Boston Gear - Norfolk Bearings and Supply Company, Inc.

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Boston Gear - Norfolk Bearings and Supply Company, Inc.
Altra Industrial Motion
A L T R A
I N D U S T R I A L
M O T I O N
All Customer Service phone numbers shown in bold
Engineered Couplings
Heavy Duty
Clutches and Brakes
Asia Pacific Sales Offices
Warner Electric
Ameridrives Couplings
Wichita Clutch
Australia
Electromagnetic Clutches
and Brakes
Mill Spindles, Ameriflex,
Ameridisc
Pneumatic Clutches
and Brakes
New Hartford, CT - USA
1-800-825-6544
Erie, PA - USA
1-814-480-5000
For application assistance:
1-800-825-9050
Gear Couplings
Wichita Falls, TX - USA
1-800-964-3262
Bedford, England
+44 (0) 1234 350311
Unit 51/9, Hoyle Avenue
Castle Hill, NSW 2154
+61 2 9894 0133
+61 2 9894 0368 (Fax)
St Barthelemy d’Anjou, France
+33 (0) 2 41 21 24 24
San Marcos, TX - USA
1-512-353-4000
Precision Electric Coils and
Electromagnetic Clutches and
Brakes
Bibby Transmissions
Columbia City, IN - USA
1-260-244-6183
Dewsbury, England
+44 (0) 1924 460801
Boksburg, South Africa
+27 11 918 4270
Matrix International
Electromagnetic Clutches
and Brakes, Pressure Operated
Clutches and Brakes
Brechin, Scotland
+44 (0) 1356 602000
New Hartford, CT - USA
1-800-825-6544
Inertia Dynamics
Spring Set Brakes; Power On and
Wrap Spring Clutch/Brakes
New Hartford, CT - USA
1-800-800-6445
Overrunning Clutches
Formsprag Clutch
Overrunning Clutches
and Holdbacks
Warren, MI - USA
1-800-348-0881– Press #1
For application assistance:
1-800-348-0881 – Press #2
Marland Clutch
Roller Ramp and Sprag Type
Overrunning Clutches
and Backstops
Burr Ridge, IL - USA
1-800-216-3515
Stieber Clutch
Overrunning Clutches
and Holdbacks
Heidelberg, Germany
+49 (0) 6221 30 47 0
Disc, Gear, Grid Couplings,
Overload Clutches
TB Wood’s
www.warnerelectric.com.au
China - Hong Kong
Twiflex Limited
Room 304A, 3rd Floor
Join-In Hang Sing Centre
71-75 Container Port Rd.
Kwai Chung, Hong Kong
+852 2615 9313
+852 2615 9162 (Fax)
Caliper Brakes and Thrusters
Twickenham, England
+44 (0) 20 8894 1161
Industrial Clutch
www.warnerelectric.com.hk
Pneumatic and Oil Immersed
Clutches and Brakes
China - Shanghai
Waukesha, WI - USA
1-262-547-3357
Shanghai Universal Mansion
Suite 703, 168 Yuyuan Road,
Shanghai 200040
+86 21 5169-9255
+86 21 6248 5387 (Fax)
Elastomeric Couplings
Chambersburg, PA - USA
1-888-829-6637– Press #5
For application assistance:
1-888-829-6637 – Press #7
General Purpose
Disc Couplings
San Marcos, TX - USA
1-512-353-4000
Ameridrives Power
Transmission
Universal Joints, Drive Shafts,
Mill Gear Couplings
Green Bay, WI - USA
1-920-593-2444
Gearing
Boston Gear
www.altramotion.com.cn
Enclosed and Open Gearing,
Electrical and Mechanical
P.T. Components
China - Taiwan
3rd Fl., No. 35, Lane 32
Kwang-Fu, South Road
10562 Taipei
+886 2 2577 8156
+886 2 2570 6358 (Fax)
Charlotte, NC - USA
1-800-825-6544
For application assistance:
1-800-816-5608
www.warnerelectric.com.tw
Nuttall Gear and
Delroyd Worm Gear
Singapore
Worm Gear and
Helical Speed Reducers
39 Benoi Road
Singapore 627725
+65 6487 4464
+65 6487 6674 (Fax)
Niagara Falls, NY - USA
1-716-298-4100
Huco Dynatork
www.warnerelectric.com.sg
Precision Couplings
and Air Motors
Belted Drives and Sheaves
Hertford, England
+44 (0) 1992 501900
Charlotte, NC - USA
1-800-825-6544
TB Wood’s
Thailand
Belted Drives
Chambersburg, PA - USA
1-888-829-6637 – Press #5
Linear Products
For application assistance:
1-888-829-6637 – Press #7
Warner Linear
Engineered
Bearing Assemblies
Linear Actuators and
Guideways
Belvidere, IL - USA
1-800-825-6544
For application assistance:
1-800-825-9050
178 Soi Anamai Srinakarin Rd.,
Suanluang Bangkok 10250
+66 2 322 5527
+66 2 320 2380 (Fax)
www.warnerelectric.co.th
For more information, or to contact
authorized agents in Japan, Korea, India,
or elsewhere in Asia Pacific, send an email
to: [email protected]
Kilian Manufacturing
Engineered Bearing Assemblies
Syracuse, NY - USA
1-315-432-0700
St Barthelemy d’Anjou, France
+33 (0) 2 41 21 24 24
www.bostongear.com
701 Carrier Drive
Charlotte, NC 28216 - USA
704-588-5610
Fax: 704-588-7181
P-1930-BG
4 /10
Printed in USA
BOSTON GEAR Gears, Bearings, Couplings and Shaft Accessories
Electromagnetic
Clutches and Brakes
Rotary Drive Products
Gears, Bearings, Couplings and Shaft Accessories
Altra
Industrial Motion
Boston Gear
Boston Gear is a global supplier of quality power
transmission products to most major industrial markets. With
unparalleled delivery programs and superior customer service,
the power transmission consumer, distributor and OEMs who
demand the best, count on Boston Gear.
Boston Gear provides an extensive off-the-shelf product
offering of more than 20,000 products combined with the
ability to custom engineer unique solutions when required.
Products are designed to perform in an unlimited array of
industrial applications from unit handling to food processing
and everything in between including solutions for paper
converting, corrugated, mixers, hoists, pumps and steel.
Altra is a leading multinational
designer, producer and marketer
of a wide range of mechanical
power transmission products.
We sell our products in over 70
countries throughout the world.
Boston Gear
Boston Gear is a leading global supplier of quality power transmission products to most major industrial markets
including food processing, packaging machinery, material handling and many others. Along with unparalleled delivery
programs and superior customer service, the power transmission consumer, distributor, and OEM who demand the
best, count on Boston Gear.
Centric Products
Mechanical & Pneumatic
Overload Clutches
The full family of Centric overload clutches includes
Trig-O-Matic™, Trig-O-Matic Lite™, Model H units,
pneumatic disconnect models, and VariTorque
pneumatic models. Centric centrifugal clutches are
also offered. Bore ranges from 1/2" to 4-11/16".
Torque ranges from 35 in.lb. to 88,500 in.lb.
Our products are frequently used
in critical applications, such as
fail-safe brakes for elevators,
wheelchairs and forklifts as well
as in a wide range of highvolume manufacturing processes,
where reliability and accuracy are
important for both avoiding costly
downtime and enhancing the
overall efficiency of manufacturing
operations.
See Catalog P-1500-BG
Altra products are marketed
under a variety of well recognized
and established manufacturing
brand names including Warner
Electric, Boston Gear, TB Wood’s,
and Formsprag Clutch.
High Precision
Planetary Gearheads
The Boston Gear line of servo gearheads has
been designed for direct attachment to popular
servomotors. In-line and right angle units are offered
in a variety of single and double reduction ratios.
See Catalog P-1603-BG
Worm, Helical and Bevel
Gear Drives
Boston Gear’s comprehensive line of enclosed gear
drives includes worm, in-line and parallel-shaft helical,
miter, and spiral bevel. Flanged and non-flanged
models, single and double reduction units, and right
90 drives are available. And with our Reducer
Express™ service, we'll ship any of our 15 million
different speed reducer combinations, in stock or not,
by air within 24 hours - or we'll pay the freight.
bostongear.com
See Catalog P-1485-BG
Check out BostSpec2™, the online product
configurator at bostongear.com. Just input your
application’s requirements using the drop down
menus to identify performance criteria.
The right product will power its way up to the top.
• Download 2D and 3D CAD formats and dimensional line drawings.
• Submit an online RFQ to the local distributor of your choice.
P-1930-BG
4 /10
Boston Gear 800-825-6544
225
Table Of Contents
A
B
C
D
E
F
G
Stock Altered and Custom Worm and Worm Gears ...............................................................................................3-5
Selection and Reference Guide...............................................................................................................................6-12
Product Descriptions..............................................................................................................................................13-16
SPUR GEARS
Section Contents ................................................................................................................................................17
Pinions and Spur Gears ....................................................................................................................18-27, 37-46
Change Gears ................................................................................................................................................28-32
Stem Pinions .......................................................................................................................................................33
Drawn Pinion Wire ..............................................................................................................................................34
Rack ...............................................................................................................................................................35, 47
Internal Gears................................................................................................................................................36, 48
Selection.........................................................................................................................................................49-62
Gear Gauge Sets.................................................................................................................................................62
HELICAL GEARS
Section Contents ................................................................................................................................................63
Helical Gears..................................................................................................................................................64-65
Selection.........................................................................................................................................................66-68
Stock Altered and Custom Helical Gears .......................................................................................................3-5
MITER AND BEVEL GEARS
Section Contents ................................................................................................................................................69
Miter Gears ....................................................................................................................................................70-73
Bevel Gears....................................................................................................................................................74-78
Selection.........................................................................................................................................................79-83
Stock Altered and Custom Miter & Bevel Gears............................................................................................3-5
WORMS AND WORM GEARS
Section Contents ................................................................................................................................................85
Worms and Worm Gears ..............................................................................................................................86-95
Selection.........................................................................................................................................................96-98
SHAFT ACCESSORIES
Selection Contents .............................................................................................................................................99
Shaft Couplings .........................................................................................................................................100-106
Universal Joints .........................................................................................................................................107-113
Shaft Collars, Set Screw and Clamping Collars ....................................................................................114-117
Washers and Bushings .............................................................................................................................118-119
Pulleys, Round Belt...........................................................................................................................................120
Miniature Timing Belt & Pulley Selection................................................................................................121-134
BEARINGS
Selection Contents ...........................................................................................................................................135
BOST-BRONZ (Oil-Impregnated Sintered Bronze) .............................................................................136-144
BEAR-N-BRONZ (660 Cast Bronze) .....................................................................................................145-153
Bronze Bearing Emergency Bank ................................................................................................................154
BOStonE F-1 (Glass Filled Teflon) ........................................................................................................155-157
RULON® 641 Bearings ..........................................................................................................................158-159
BOStonE Molded Plastic .......................................................................................................................160-171
BOStonE Molded Nylon .........................................................................................................................172-173
Sleeve Bearing Engineering ..................................................................................................................174-182
Anti-Friction (Ball Bearings) ..................................................................................................................183-197
Self-Aligning (Rod End & Spherical Bearings).....................................................................................198-206
Engineering.............................................................................................................................................207-211
Mounted Bearings..................................................................................................................................212-232
Rolling Element Bearing Engineering ..................................................................................................233-239
CHAINS
Section Contents ...........................................................................................................................................241
Roller Chains .............................................................................................................................................242-252
Block Chains .....................................................................................................................................................253
Continued on next page
P-1930-BG
04/10
Boston Gear 800-825-6544
1
Table Of Contents Continued
G CHAINS (continued) ......................................................................................................................................................
Leaf (Cable) Chains ..........................................................................................................................................253
Ladder Chains ...................................................................................................................................................254
Miniature Roller Chains....................................................................................................................................255
Chain Pullers/Chain Breaking Tools...............................................................................................................256
H SPROCKETS
Section Contents ...........................................................................................................................................257
Roller Chain Drives ................................................................................................................................258-265
Miniature Chain Sprockets ...........................................................................................................................266
Roller Chain Sprockets..........................................................................................................................267-289
Block Chain Sprockets .................................................................................................................................290
Ladder Chain Sprockets........................................................................................................................291-292
Roller Chain Drive Tensioners ..............................................................................................................293-296
Idler Sprockets ..............................................................................................................................................293
I ENGINEERING INFORMATION
SPUR GEARS
Nomenclature.......................................................................................................................................298-299
Involute Form ...............................................................................................................................................300
Diametral Pitch / Pressure Angle / Tooth Dimensions............................................................................301
Backlash / Undercut / Formulas ................................................................................................................302
Lewis Formula..............................................................................................................................................303
HELICAL GEARS
Nomenclature / Helix Angle........................................................................................................................304
Formulas.......................................................................................................................................................305
Thrust Loads................................................................................................................................................306
MITER & BEVEL GEARS
Nomenclature ..............................................................................................................................................307
Mounting Distance ......................................................................................................................................308
Tooth Strength / Thrust ..............................................................................................................................309
WORMS & WORM GEARS
Hand / Efficiency / Thrust Loads ...............................................................................................................310
Formulas / Self-Locking .............................................................................................................................311
COUPLING / UNIVERSAL JOINTS ..................................................................................................................312
GENERAL INFORMATION
How To Figure Horsepower & Torque ......................................................................................................313
Mountings / Alterations / Lubrication .......................................................................................................314
Materials / Styles / Keyways & Setscrews ...............................................................................................315
Sprockets, Sprocket Diameters .........................................................................................................316-318
Horsepower & Torque Capacity Of Shafting ............................................................................................319
Temperature Conversion Table .................................................................................................................320
Equivalent Table ..........................................................................................................................................321
Metric Conversion Chart ............................................................................................................................322
Application Classifications .................................................................................................................323-324
INDEX TO CATALOG NUMBERS .............................................................................................................325-328
2
Boston Gear 800-825-6544
P-1930-BG
04/10
Modified Stock Gearing
With thousands of stock gears available, chances
are we’ve got just what you’re looking for. If you
find a stock gear that’s close to what you need,
but not precisely right, that’s not a problem.
We can modify most stock gears to meet your
requirements and ship it within 24 hours.
The full range of modifications we can provide
are shown below.
MO
DI
FIE
D
24 HO
UR
ST
OC
K
SHIP
MEN
Face Width Reduced
T
GE
AR
IN
G
Keyway(s) Added
Tapped Holes Added
(for set screws)
Hub Projection Reduced
Bore Enlarged
Hub Diameter Reduced
With Boston Gear, stock
gear modifications are quick
and easy. Give us a call at
800-825-6544.
Keyways and bores
available in common
metric sizes.
Custom Gearing
Not every job is alike and not every job requires the same solution.
That’s why Boston Gear will configure a custom gear to suit you.
Even though we have built our reputation on supplying a breadth of
standard products for virtually any industry, we have forged a name
for ourselves as makers of quality custom gears. Custom doesn’t
have to mean expensive and it doesn’t have to mean that it requires
long lead times.
Depending on the amount of tooling required and the complexity of
the job, your custom gear solution can be delivered in days, not
weeks. No matter how small or how large your job is, contact our
custom engineering team for a customized quote.
To request a quote for a custom gear solution from Boston Gear,
simply fill out the “Request For Quotation Form” on page 5, and
FAX to 800-387-0130. Or give us a call at 800-816-5608.
P-1930-BG
4/10
Boston Gear 800-825-6544
3
Custom Gearing Capabilities
Gear Types
Tolerances
• Spur
• Helical
• Miter & Bevel
• Worm & Worm Gear
AGMA Classes
AGMA 9
Non-Heat Treated,
Spur & Helical Gears only
AGMA 8 Heat Treated & Non-Heat Treated,
all other gears
Bore Diameter
.0005"
.0010"
Ground O.D.
.0005"
.0010"
Turned O.D.
.0020"
.0020"
Bore Length
.0020"
.0020"
Keyway Width
.0020"
.0020"
Keyway Depth
.0100"
.0100"
≤ 2"
Diameter
≥ 2"
Diameter
Perpendicularity
.0010"
.0010"
Parallelism
.0010"
.0010"
Circular Runout
.0010"
.0010"
Features
Diametral
Pitch
Pitch
Diameter
Face
Max.
Spur
64DP-3DP
.250"-36.000"
5.000"
Helical
64DP-3DP
.337"-24.000"
5.000"
64DP-3DP
1.000"-24.000"
Bevel & Miter
64DP-3DP
.500"-24.000"
3.000"
Worm
48DP-3DP
.333"-4.000"
12.000"
Worm Gear
48DP-3DP
.420"-24.000"
5.000"
Shaved Gear
24DP-3DP
1.000"-24.000"
5.000"
Splines
2B Thread
Geometric Dimensioning
Capacities
Internal Spur
≥ 2"
Diameter
Tapped Holes
Note: Worm & Worm Gears do not have AGMA Class
listings, however Boston Gear manufacturing
tolerances relate to AGMA 8.
Gear
Type
≤ 2"
Diameter
Features
5.000"
Consult Engineering
Module
Diametral
Pitch
Circular
Pitch (in.)
.4
.5
.6
.8
1
1.25
1.5
2
2.5
3
4
5
6
63.500
50.800
42.333
31.750
25.400
20.320
16.933
12.700
10.160
8.467
6.350
5.080
4.233
.0495
.0618
.0742
.0989
.1237
.1546
.1855
.2474
.3092
.3711
.4947
.6184
.7422
8
3.175
.9895
Note: Circular Pitch (.0491”-1.0472”) or Module Pitch
(.4mm-8mm) within the Diametral Pitch Limits are
optional (refer to page 302).
Flatness
.0010"
.0010"
Concentricity
.0005"
.0010"
Backlash
Refer to Engineering Information found on pages 301
and 309.
Refer to engineering for backlash related to helical and
worm gearing.
Lot Sizes
25 pcs
Minimum Quantity on 6" OD and less
Finishes
63 RMS Minimum on gear teeth
32 RMS Minimum on Bores, Shaved Gear Teeth, Ground
Worms, and Machined Surfaces
Material
Description
Designation
Low Carbon Steels
11L17, 12L14, 12L15
Medium Carbon Steels
11L41, 1045
Low Carbon Alloy Steels
86(L)20* (*86L20 or 8620)
Medium Carbon Alloy Steels
41(L)30, 41(L)40, 41(L)50
Preheat Treated Steels
4140, 4150
Stainless Steels
17-4PH, 303, 304
Cast Iron
Grade 25, Grade 30
Brass
Free Cutting, Half Hard
Bronze
Non-Metallic
4
Boston Gear 800-825-6544
Phenolic (NEMA“C”), Delron, Nylon
P-1930-BG
4/10
Custom Gearing “Request For Quotation” Form
Company Name
Date
Address
Ref.
City/State
Zip
Tel. No.
Quantity Req.
Fax No.
P.O. No.
Contact Name
email
Gear Type
Spur
Helical
Miter
Bevel
Worm
Worm Gear
No. of Teeth
Pitch (DP, CP MOD)
Pressure Angle
Helix Angle
Hand (LH, RH)
Material
Face Width
Length Through Bore
Hub Diameter
Hub Projection
Bore Diameter
Keyway
Setscrew(s)
Teeth in Mating Gear
Center Distance
Mounting Distance
No. of Starts (Thread)
Outside Diameter
Heat Treat — Yes/No
Depth of Hardness
Special Information
FAX to 800-387-0130. Or give us a call at 800-816-5608.
P-1930-BG
4/10
Boston Gear 800-825-6544
5
Modified Stock Gearing
With thousands of stock gears available, chances
are we’ve got just what you’re looking for. If you
find a stock gear that’s close to what you need,
but not precisely right, that’s not a problem.
We can modify most stock gears to meet your
requirements and ship it within 24 hours.
The full range of modifications we can provide
are shown below.
MO
DI
FIE
D
24 HO
UR
ST
OC
K
SHIP
MEN
Face Width Reduced
T
GE
AR
IN
G
Keyway(s) Added
Tapped Holes Added
(for set screws)
Hub Projection Reduced
Bore Enlarged
Hub Diameter Reduced
With Boston Gear, stock
gear modifications are quick
and easy. Give us a call at
800-825-6544.
Keyways and bores
available in common
metric sizes.
Custom Gearing
Not every job is alike and not every job requires the same solution.
That’s why Boston Gear will configure a custom gear to suit you.
Even though we have built our reputation on supplying a breadth of
standard products for virtually any industry, we have forged a name
for ourselves as makers of quality custom gears. Custom doesn’t
have to mean expensive and it doesn’t have to mean that it requires
long lead times.
Depending on the amount of tooling required and the complexity of
the job, your custom gear solution can be delivered in days, not
weeks. No matter how small or how large your job is, contact our
custom engineering team for a customized quote.
To request a quote for a custom gear solution from Boston Gear,
simply fill out the “Request For Quotation Form” on page 5, and
FAX to 800-387-0130. Or give us a call at 800-816-5608.
P-1930-BG
04/10
Boston Gear 800-825-6544
3
Custom Gearing Capabilities
Gear Types
Tolerances
• Spur
• Helical
• Miter & Bevel
• Worm & Worm Gear
AGMA Classes
Non-Heat Treated,
Spur & Helical Gears only
AGMA 8 Heat Treated & Non-Heat Treated,
all other gears
AGMA 9
Bore Diameter
.0005"
.0010"
Ground O.D.
.0005"
.0010"
Turned O.D.
.0020"
.0020"
Bore Length
.0020"
.0020"
Keyway Width
.0020"
.0020"
Keyway Depth
.0100"
.0100"
≤ 2"
Diameter
≥ 2"
Diameter
Perpendicularity
.0010"
.0010"
Parallelism
.0010"
.0010"
Circular Runout
.0010"
.0010"
Features
Diametral
Pitch
Pitch
Diameter
Face
Max.
Spur
64DP-3DP
.250"-36.000"
5.000"
Helical
64DP-3DP
.337"-24.000"
5.000"
64DP-3DP
1.000"-24.000"
Bevel & Miter
64DP-3DP
.500"-24.000"
3.000"
Worm
48DP-3DP
.333"-4.000"
12.000"
Worm Gear
48DP-3DP
.420"-24.000"
5.000"
Shaved Gear
24DP-3DP
1.000"-24.000"
5.000"
Splines
2B Thread
Geometric Dimensioning
Capacities
Internal Spur
≥ 2"
Diameter
Tapped Holes
Note: Worm & Worm Gears do not have AGMA Class
listings, however Boston Gear manufacturing
tolerances relate to AGMA 8.
Gear
Type
≤ 2"
Diameter
Features
5.000"
Consult Engineering
Module
Diametral
Pitch
Circular
Pitch (in.)
.4
.5
.6
.8
1
1.25
1.5
2
2.5
3
4
5
6
63.500
50.800
42.333
31.750
25.400
20.320
16.933
12.700
10.160
8.467
6.350
5.080
4.233
.0495
.0618
.0742
.0989
.1237
.1546
.1855
.2474
.3092
.3711
.4947
.6184
.7422
8
3.175
.9895
Note: Circular Pitch (.0491”-1.0472”) or Module Pitch
(.4mm-8mm) within the Diametral Pitch Limits are
optional (refer to page 302).
Flatness
.0010"
.0010"
Concentricity
.0005"
.0010"
Backlash
Refer to Engineering Information found on pages 301
and 309.
Refer to engineering for backlash related to helical and
worm gearing.
Lot Sizes
25 pcs
Minimum Quantity on 6" OD and less
Finishes
63 RMS Minimum on gear teeth
32 RMS Minimum on Bores, Shaved Gear Teeth, Ground
Worms, and Machined Surfaces
Material
Description
Designation
Low Carbon Steels
11L17, 12L14, 12L15
Medium Carbon Steels
11L41, 1045
Low Carbon Alloy Steels
86(L)20* (*86L20 or 8620)
Medium Carbon Alloy Steels
41(L)30, 41(L)40, 41(L)50
Preheat Treated Steels
4140, 4150
Stainless Steels
17-4PH, 303, 304
Cast Iron
Grade 25, Grade 30
Brass
Free Cutting, Half Hard
Bronze
Non-Metallic
4
Boston Gear 800-825-6544
Phenolic (NEMA“C”), Delron, Nylon
P-1930-BG
04/10
Custom Gearing “Request For Quotation” Form
Company Name
Date
Address
Ref.
City/State
Zip
Tel. No.
Quantity Req.
Fax No.
P.O. No.
Contact Name
email
Gear Type
Spur
Helical
Miter
Bevel
Worm
Worm Gear
No. of Teeth
Pitch (DP, CP MOD)
Pressure Angle
Helix Angle
Hand (LH, RH)
Material
Face Width
Length Through Bore
Hub Diameter
Hub Projection
Bore Diameter
Keyway
Setscrew(s)
Teeth in Mating Gear
Center Distance
Mounting Distance
No. of Starts (Thread)
Outside Diameter
Heat Treat — Yes/No
Depth of Hardness
Special Information
FAX to 800-387-0130. Or give us a call at 800-816-5608.
P-1930-BG
04/10
Boston Gear 800-825-6544
5
Gear Selection
Stock Gears
Spur
Gears
Description
Miter
and
Bevel
Gears
Worms
and
Worm
Gears
6
Boston Gear 800-825-6544
Pressure
Angle (PA)
Material
Pinions
and
Gears
Parallel
Shafts
14-1/2°
20°
14-1/2°
20°
Brass
Brass
Steel
Delrin
Pinions
and
Gears
Parallel
Shafts
14-1/2°
14-1/2°
20°
Non-Metallic
Steel, Iron
Steel, Iron
Change
Gears
Parallel
Shafts
14-1/2°
Steel, Iron
Stem
Pinions
Parallel
Shafts
14-1/2°
Steel
Drawn
Pinion
Wire
Parallel
Shafts
Brass
14-1/2°
Steel
Use with
Spur Gears
14-1/2°
14-1/2°
20°
Nylon
Steel
Steel
Internal
Gears
Parallel
Shafts
14-1/2°
20°
Brass
Brass
Helical
Gears
Parallel
and 90°
Non-Intersecting
Shafts
14-1/2°
Steel
Bronze
Straight
Miter
Gears
90°
Intersecting
Shafts
20°
Nylon
Brass
Steel
Iron
Spiral
Miter
Gears
90°
Intersecting
Shafts
20°
Steel
Straight
Bevel
Gears
90°
Intersecting
Shafts
20°
Brass
Steel
Iron
Spiral
Bevel
Gears
90°
Intersecting
Shafts
20°
Steel
Rack
Helical
Gears
Application
(PA)
90°
Non-Intersecting
Shafts
14-1/2°
Thread
Worm
Gear
Worms/
Worm Gears
Single
Acetal
Nylon
Acetal
Minlon
Bronze
Worms/
Worm Gears
90°
14-1/2°
Non-Intersecting
20°
Shafts
25°
Single
Double
Quad
Steel
Bronze
Worms/
Worm Gears
90°
14-1/2°
Non-Intersecting
20°
Shafts
25°
Single
Double
Quad
Steel
Iron
P-1930-BG
04/10
Reference Guide
Gear Catalog Reference Pages
Horsepower
Catalog
Selection
and Torque
Number
Procedure
Ratings
Selection
Diametrical
Pitch
Pitch
Diameter
Face Width
48DP – 16DP
64DP – 24DP
32DP – 24DP
48DP – 24DP
.208" – 5.000"
.250" – 6.000"
.500" – 6.000"
.375" – 2.500"
.062" – .313"
.125" – .250"
.187" – .250"
.125" – .250"
49
49
49
49
50 – 52
–
50
–
18 – 21
37 – 42
19 – 20
37 – 42
16DP – 8DP
20DP – 3DP
20DP – 5DP
1.000" – 3.500"
.750" – 36.000"
.600" – 36.000"
.500" – 1.250"
.500" – 3.000"
.500" – 2.500"
49
49
49
52 – 55
51 – 57
58 – 62
22 – 24
20 – 27
42 – 46
20DP – 8DP
1.000" – 12.500"
.375" – 1.250"
49
51 – 55
28 – 32
20DP – 6DP
.287" – 1.750"
1.125" – 3.000"
49
51 – 56
33
48DP – 24DP
48DP – 24DP
.125" – .667"
.125" – .667"
48" Lengths
48" Lengths
49
49
50
50
34
34
48DP – 24DP
48DP – 3DP
20DP – 4DP
.104" – .208"
.104" – 1.167"
.450" – 1.750"
.125" – .250"
.125" – 3.000"
.500" – 3.500"
49
49
49
50
50 – 57
58 – 62
35
35
47
48DP – 16DP
64DP – 24DP
1.000" – 6.000"
1.000" – 6.000"
.125" – .312"
.125" – .250"
49
49
50
–
36
48
24TDP – 6TDP
8TDP – 6TDP
.333" – 6.000"
1.000" – 6.000"
.250" – 1.250"
.750" – 1.250"
66
66
67 – 68
68
64 – 65
65
48DP – 16DP
48DP – 24DP
48DP – 4DP
8DP – 4DP
.312" – 2.000"
.312" – 1.500"
.375" – 7.000"
3.500" – 8.000"
.070" – .390"
.080" – .230"
.080" – 1.430"
.750" – 1.333"
79
79
79
79
80
80
80 – 81
80 – 81
70 – 71
70
70 – 72
72
18DP – 5DP
1.000" – 5.000"
.220" – 1.150"
79
83
73
48DP – 24DP
20DP – 6DP
16DP – 4DP
.250" – 2.000"
.500" – 6.000"
1.000" – 9.000"
.090" – .260"
.180" – 1.070"
.420" – 1.400"
79
79
79
82
82
82
74
74 – 77
75 – 77
30DP – 8DP
.430" – 4.250"
.140" –.710"
79
83
78
96
–
86 – 88
Worm
Gear
Worm
Gear
.333"
to
1.500"
.417"
to
4.167"
.562"
to
.812"
.156"
to
.219"
48DP – 4DP
.333"
to
3.000"
.417"
to
6.000"
.562"
to
5.250"
.156"
to
1.500"
96
97 – 98
86 – 94
16DP – 3DP
.625"
to
4.000"
1.250"
to
18.000"
1.000"
to
5.250"
.312"
to
2.000"
96
97 – 98
89 – 95
48DP – 32DP
24DP – 32DP
48DP – 24DP
P-1930-BG
04/10
Tooth Gauge
Boston Gear 800-825-6544
7
Product Selection / Reference Guide
BOST-BRONZ®
OIL
IMPREGNATED
SINTERED
BRONZE
PLAIN CYLINDRICAL
FLANGED TYPE
THRUST TYPE
Pages 138–140
Pages 141–142
Page 143
PLATE STOCK
CORED BARS
SOLID BARS
Page 143
PLAIN CYLINDRICAL
Page 144
CORED BARS
Page 144
SOLID BARS
Pages 146–150
Pages 151–153
BEAR-N-BRONZ®
660 CAST
BRONZE
Page 153
BOST-BRONZ & BEAR-N-BRONZ
PLAIN CYLINDRICAL
BOSTONE® F-1
GLASS FILLED
TEFLON
BRONZE
EMERGENCY
BEARING BANKS
Page 154
Page 156
FLANGED
THRUST TYPE
SOLID BARS
(EXTRUDED)
Page 156
Page 157
Page 157
BOStonE® F-1
GLASS FILLED
TEFLON
RULON® 641 BEARINGS
PLAIN CYLINDRICAL
BOSTONE®
MOLDED
PLASTIC
Rulon®
Pages 158–159
BOStonE®
MOLDED
PLASTIC
8
FLANGED
Page 161
Page 161
ROLL END FOR TUBING
& STANDARD PIPE
EXTRA LENGTH BLIND
BORE INSERTS
ROLL END ADAPTER
FOR HEX SHAFT
GUIDE ROLL
Pages 162–168
ROLLERS
Page 169
SHAFT CLIP
Page 169
STUB SHAFT FOR
ROLLERS
Page 170
Page 170
Page 171
Page 171
Boston Gear 800-825-6544
P-1930-BG
04/10
Product Selection / Reference Guide
PLAIN CYLINDRICAL
FLANGED
THRUST TYPE
CABLE PULLEYS
Page 172
Page 172
Page 173
Page 173
1600 SERIES
7500 SERIES
7600 SERIES
6900 SERIES
Pages 185–186
Page 187
Page 188
Page 189
3000 SERIES
400F SERIES FLANGED
BOStonE®
MOLDED
NYLON
RADIAL
BALL
BEARINGS
Pages 190–191
Page 192
GROUND, UNBANDED
600 SERIES
THRUST
BALL
BEARINGS
Page 193
Page 194
2000 SERIES
2100 SERIES
BALL
BEARING
WHEELS
BALL
BEARING
SHEAVES
ROD
END
BEARINGS
P-1930-BG
04/10
2200 SERIES
Page 195
Page 196
KF FEMALE SERIES
HM-C SERIES
HF-C FEMALE SERIES
CMHD MALE SERIES
CFHD FEMALE SERIES
HM MALE SERIES
HF FEMALE SERIES
Page 200
Page 201
Page 198
Page 199
HME MALE SERIES
HFE FEMALE SERIES
HMX MALE SERIES
HFX FEMALE SERIES
Page 202
Page 203
Page 197
Boston Gear 800-825-6544
9
Product Selection / Reference Guide
LHA-LHB-LHSS
SERIES
LHSSE-LHSSVV
SERIES
LS SERIES
Page 206
SPHERICAL
BEARINGS
REPLACEMENT
BEARINGS
& LOCKING
COLLAR SERIES
PILLOW
BLOCKS
FLANGED
UNITS
Page 204
Page 205
L, H, F, T, A
SERIES
PS/XL-S-MB SERIES
Page 213
Page 214
PPB SERIES
PS SERIES
XL SERIES
L-SERIES
H-SERIES
Page 215
Page 216
Page 217
Pages 218–219
SL/SH SERIES
MB SERIES
Pages 220–221
Page 222
PS2/PS3 SERIES
XL2/XL3 SERIES
F SERIES
T-SERIES
SF/ST SERIES
Pages 225–226
Pages 227–228
Page 223
Page 224
MBF SERIES
MBP SERIES
Page 229
Page 230
A SERIES
SHAFT
SUPPORTS
TAKE-UP
FRAMES
Page 231
10
TU SERIES
Boston Gear 800-825-6544
Page 232
P-1930-BG
04/10
Product Selection / Reference Guide
COUPLINGS
INSERT (3 JAW)
SPIDER RING
SHEAR
FC Type – Pages 100-101
BF Type – Page 102
BG Type – Page 103
CLAMP
MULTI-JAW
RIGID
SLEEVE
SCC Type – Page 104
FA Type – Page 105
CR Type – Page 105
FCP Type – Page 106
PIN & BLOCK
FORGED
MOLDED
MOLDED WITH
SLIDE EXTENSION
J Type – Pages 107–108
UJN Type – Pages 109–111
JP Type – Page 112
JPE Type – Page 113
UNIVERSAL
JOINTS
SETSCREW
CLAMPING–THREADED
CLAMPING – 1 PIECE
CLAMPING – 2 PIECE
SC Type – Page 114
CSC Type – Page 115
CS Type – Page 116
2CS Type – Page 117
COLLARS
HARDENED STEEL WASHERS
WASHERS
SOFT STEEL BUSHINGS
BUSHINGS
Page 118
Page 119
GROOVED
PULLEYS
Page 120
TIMING BELTS
PULLEYS
Pages 121-124 & 130
Pages 125–129 & 131–134
MINIATURE
TIMING BELTS
& PULLEYS
P-1930-BG
04/10
Boston Gear 800-825-6544
11
Product Selection / Reference Guide
ROLLER,
BLOCK &
LEAF CHAINS
MULTIPLE WIDTHS
ANSI STANDARD
TRANSMISSION
SERIES
CONVEYOR SERIES
HEAVY SERIES
Page 243–244
Page 245
Page 245
Page 245
ATTACHMENTS
HOLLOW PIN
BLOCK
LEAF (CABLE)
Page 251
LADDER
Page 252
MINIATURE ROLLER
CHAIN
Page 253
CHAIN PULLERS &
CHAIN BREAKING
TOOLS
Page 253
Page 254
Page 255
Page 256
PLASTIC & STAINLESS
STEEL
ROLLER CHAIN
BLOCK CHAIN
LADDER CHAIN
SPROCKETS
Page 266
Pages 267–289
Page 290
Pages 291–292
SCREW/SPRING ADJUSTABLE SHAFT MOUNTED DRIVE TENSIONS
TYPE LG
TYPE BG
Page 294
Pages 294-295
TYPE HG &UG
DRIVE
TENSIONERS
12
Boston Gear 800-825-6544
Page 296
P-1930-BG
04/10
Boston Gear
Spur Gears
■
■
■
■
■
Parallel Shaft Applications
Reliability from Steel, Cast Iron
and Brass
More Cost Effective, Quieter Running
and Corrosion-Resistant Operation
from Non-Metallic Options
Higher Load Carrying Capacity with
20° PA (Pressure Angle)
Higher Contact Ratio for a Smoother,
Quieter Operation with 14-1/2° PA
Selections From Stock
• Pinions and Gears (Steel, Cast
Iron, Brass, Non-Metallic)
• Change Gears (Steel or Cast
Iron)
• Stem Pinions (Steel)
• Drawn Pinion Wire (Brass,
Steel)
• Rack (Steel, Nylon)
• Internal (Brass)
• Diametral Pitch 64 DP to 3 DP
• Pitch Diameter .208" to
36.000"
• Diametral Pitch System
Standardized on Stock Gears
• 14-1/2° and 20° Pressure
Angles
Boston spur gears are designed to transmit motion and power between
parallel shafts. Configurations include spur, rack, pinion wire, stem
pinions and internal gears; most with a selection of bores, keyways and
set screws. Fine-pitch gears are available in plastic, brass, stainless steel
and steel. Heavier pitch spurs are available in steel and cast iron. Styles
include plain, web, web with lightening holes or spoked. Change gears
have consecutive numbers of teeth for a variety of ratios.
Boston Gear manufactures both 14-1/2° and 20°PA, involute, full depth
system gears. While 20°PA is generally recognized as having higher load
carrying capacity, 14-1/2°PA gears have extensive use. The lower
Pressure Angle results in less change in backlash due to center distance
variation and concentricity errors. It also provides a higher contact ratio
and is consequently a smoother, quieter operation provided that the
undercut of the teeth is not present.
P-1930-BG
04/10
Boston Gear 800-825-6544
13
Boston Gear
Helical Gears
■
■
■
■
■
Parallel and 90° Non-Intersecting Shaft
Applications
Improved Tooth Strength
Greater Load Carrying Capacity
Increased Contact Ratio
Smoother Operating Characteristics
Selections From Stock
• Helicals, 45° Helix Angle
• Transverse Diametral Pitch (TDP)
System
• Hardened Steel (24 TDP – 6 TDP)
• Bronze (8 TDP – 6 TDP)
• Pitch Diameter .333" to 6.000"
• 14-1/2° Pressure Angle
Boston helical gears are stocked both right and left hand, made with a 45°
helix angle. They are designed to transmit motion and power between
non-intersecting shafts which are positioned either parallel (opposing hand)
or at 90° to each other (same hand). Because these gears are top-hobbed,
there is extremely close concentricity between the pitch diameter and the
outside diameter.
Helical gears offer additional benefits relative to Spur Gears, those being:
– Improved tooth strength due to the elongated helical wrap-around.
– Increased contact ratio due to the axial tooth overlap.
– Helical Gears tend to have greater load carrying capacity than Spur Gears
of similar size.
– Because of the above, smoother operating characteristics are apparent.
All Boston Helicals are cut to the Transverse Diametral Pitch System, resulting
in a higher Normal Diametral Pitch Number.
14
Boston Gear 800-825-6544
P-1930-BG
04/10
Boston Gear
Miter and Bevel Gears
■
■
■
■
■
■
90° Intersecting Shaft Applications
Coniflex® Tooth Form for Increased Life and
Smoother, Quieter Operation
Spiral Miter and Bevel for Higher Speed, Greater
Torque Load, and Quieter Operating Applications
Miter Gears for 1:1 Ratio Applications
Bevel Gears for 1.5:1 to 6:1 Ratio Applications
Soft Bores for Customized Alterations
Selections from Stock
• Straight Miter Gears
– Nylon (48 DP – 16 DP)
– Brass (48 DP – 24 DP)
– Steel (48 DP – 4 DP)
– Iron (8 DP – 4 DP)
• Spiral Miter Gears (35° Spiral Angle)
– Steel (18 DP – 5 DP)
• Straight Bevel Gears
– Brass (48 DP – 24 DP)
– Steel (20 DP – 6 DP)
– Iron (16 DP – 4 DP)
• Spiral Bevel Gears (35° Spiral Angle)
– Steel (30 DP – 8 DP)
• Diametral Pitch – 48 DP to 4 DP
• Pitch Diameter – 0.250" to 9.000"
• 20° Pressure Angle
• Hardened or Unhardened Teeth (Steel)
• Made in Accordance with AGMA
Specifications for the Basic Tooth
Form
Boston miter and bevel gears are designed for transmission of motion and
power between intersecting shafts positioned at a right angle. Straight tooth
miter and bevel gears are cut with a generated tooth form having a localized
lengthwise tooth bearings known as the “Coniflex”® tooth form. The superiority
of these gears over straight bevels with full length tooth bearing lies in the
control of tooth contact. The localization of contact permits minor adjustment
of the gears in assembly and allows for some displacement due to deflection
under operating loads, without concentration of the load on the end of the
tooth. This results in increased life and quieter operation.
Spiral tooth form miter and bevel gears are suited for higher speed and larger
torque applications.
®Registered
P-1930-BG
trademark of The Gleason Works.
04/10
Boston Gear 800-825-6544
15
Boston Gear
Worms and Worm Gears
■
■
■
■
■
■
90° Non-Intersecting Shaft Applications
Smoothest, Quietest Form of Gearing
High Ratio Speed Reduction
Minimal Space Requirements
Resistance to Back Driving with
Some Ratios
Increased Efficiency with Lower Ratios
Selections from Stock
• Worms
– Acetal (48 DP – 24 DP)
– Steel (48 DP – 3 DP)
• Worm Gears
– Acetal (48 DP – 24 DP)
– Bronze (48 DP – 4 DP)
– Cast Iron (16 DP – 3 DP)
• Pressure Angle
– 14-1/2°, 20°, 25°
• Thread
– Single, Double, Quadruple
• Diametral Pitch – 48 DP to 3 DP
• Center Distances – 0.375" to
11.000"
Boston Gear worms and worm gears provide an effective answer for such
power transmission applications as high-ratio speed reduction, limited space,
right-angle shafts and non-intersecting shafts. When properly applied, they
are the smoothest and quietest form of gearing. Steel worms and cast iron or
bronze worm gears having throated teeth are available in single or multiple
threads, 48 to 3 diametral pitch or up to 85" pitch diameter. Acetal worms
and worm gears are available in 48, 32 and 24 diametral pitches.
The efficiency of a worm gear drive depends on the lead angle and number of
starts on the worm. The angle generally decreases with increasing ratio and
worm pitch diameter. For increased efficiency the ratio should be kept low.
16
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Section Contents
A
14-1/2° PRESSURE ANGLE – CATALOG NUMBER / DIMENSIONS
Spur Gears ................................................................................................................................. 18-27
Change Gears ............................................................................................................................. 28-32
Stem Pinions..................................................................................................................................... 33
Drawn Pinion Wire ........................................................................................................................... 34
Rack .................................................................................................................................................. 35
Internal Gears................................................................................................................................... 36
20° PRESSURE ANGLE – CATALOG NUMBER / DIMENSIONS
Spur Gears .................................................................................................................................. 37-46
Rack .................................................................................................................................................. 47
Internal Gears................................................................................................................................... 48
Selection Procedure................................................................................................................................. 49
Horsepower & Torque Ratings .......................................................................................................... 50-62
Gear Gauges ............................................................................................................................................. 62
Stock Altered/Custom Spur Gears........................................................................................................ 3-5
Spur Gear Engineering Information .............................................................................................. 298-303
P-1930-BG
04/10
Boston Gear 800-825-6544
17
Spur Gears
48 and 32 Diametral Pitch (Brass)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Hub
Pitch
Dia.
Bore
Dia.
Proj.
DIAMETRAL PITCH
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
.208
.250
.292
.312
.333
.375
.417
.458
.500
.542
.667
.750
.833
.917
1.000
1.125
1.250
1.375
1.500
1.750
2.000
2.083
2.500
3.000
4.000
.0935
–
BRASS
–
.125
–
–
.1875
–
–
.250
.50
.25
.3125
.62
.31
32
STANDARD TOLERANCES
48 D.P.
TOLERANCE
±.0005
32 D.P.
A
D
G127
G129
G130
G131
G132
G133
G134
G135
G136
G137
G138
G139
G140
G141
G142
G143
G144
G145
G146
G147
G148
G154
G149
G150
G151
09322
09324
09326
09328
09330
09332
09334
09336
09338
09340
09342
09344
09346
09348
09350
09352
09354
09356
09358
09360
09362
09364
09366
09368
09370
Face = .062"
Outside Dia. = Pitch Dia. + .062"
DIAMETRAL PITCH
DIMENSION
BORE
All
Without Keyway
or Setscrew
Catalog
Item
Number
Code
Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.
48
10
12
14
15
16
18
20
22
24
26
32
36
40
44
48
54
60
66
72
84
96
100
120
144
192
Style
See
Page
315
BRASS
10
14
16
20
24
28
32
40
48
64
80
96
112
128
.312
.438
.500
.625
.750
.875
1.000
1.250
1.500
2.000
2.500
3.000
3.500
4.000
8
10
12
14
15
16
18
20
22
24
26
28
30
32
36
40
44
48
52
56
.250
.312
.375
.438
.469
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.125
1.250
1.375
1.500
1.625
1.750
.125
–
–
.1875
–
–
.250
–
–
.3125
–
–
.375
–
–
A
G96
G98
G99
G101
G102
G103
G104
G105
G106
G110
G111
G112
G113
G114
09234
09238
09240
09244
09246
09248
09250
09252
09254
09256
09258
09260
09262
09264
G159
G161
G163
G165
G166
G167
G168
G169
G170
G171
G172
G173
G174
G175
G176
G177
G178
G179
G180
G181
09266
09268
09270
09272
09274
09276
09278
09280
09282
09284
09286
09288
09290
09292
09294
09296
09298
09300
09302
09304
Face = .188"
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
18
Boston Gear 800-825-6544
.125
–
–
.1875
–
–
.250
–
–
.3125
–
–
A
P-1930-BG
04/10
Spur Gears
32 and 24 Diametral Pitch (Brass & Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Hub
Pitch
Dia.
Bore
Dia.
Proj.
Style Without Keyway
or Setscrew
See
Page Catalog Item
315 Number Code
DIAMETRAL PITCH
2.000
2.250
2.500
3.000
3.500
4.000
16
20
22
24
28
32
40
48
56
64
80
96
16
18
20
22
24
26
28
30
32
40
48
56
64
80
96
128
160
192
.500
.625
.688
.750
.875
1.000
1.250
1.500
1.750
2.000
2.500
3.000
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.250
1.500
1.750
2.000
2.500
3.000
4.000
5.000
6.000
.25
.3125
A
Face = .188"
Outside Dia. = Pitch Dia. + .062"
Overall Length = .187" + Hub Proj.
32
64
72
80
96
112
128
With
Setscrew
Catalog Item
Number Code
BRASS
B
C
.62
.31
D
.75
G182
G183
G184
G185
G186
G187
09306
09308
09310
09312
09314
09316
–
–
–
–
–
–
–
–
–
–
–
–
STEEL
.1875
–
–
.250
–
–
.3125
.375
.3125
–
–
–
–
.375
–
–
.1875
.39
.45
.52
.58
.64
.70
.75
.75
.75
.250
.3125
.88
.375
.31
.31
A
.31
.38
.38
1.00
.38
1.12
1.25
1.88
2.12
2.12
.38
.50
.50
.50
.50
24
DIAMETRAL PITCH
S3216
09572
–
–
S3220
09574
–
–
S3222
09576
–
–
S3224
09578
–
–
S3228
09580
–
–
S3232
09582
–
–
S3240
09584
–
–
S3248
09586
–
–
S3256
09588
–
–
S3264
09590
–
–
S3280
09592
–
–
S3296
09594
–
–
–
–
H3216
09536
–
–
H3218
09538
–
–
H3220
09540
–
–
H3222
09542
–
–
H3224
09544
–
–
H3226
09546
–
–
H3228
09548
–
–
H3230
09550
–
–
H3232
09552
–
–
H3240
09554
–
–
H3248
09556
–
–
H3256
09558
–
–
H3264
09560
–
–
H3280
09562
–
–
H3296
09564
–
–
H32128 09566
–
–
H32160 09568
–
–
H32192 09570
Face = .250"
Outside Dia. = Pitch Dia. + .083"
Overall Length = .250" + Hub Proj.
HUB
PROJ.
FACE
PITCH
DIA.
BORE
HUB
DIA.
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
32 D.P.
TOLERANCE
±.0005
24 D.P.
BRASS
12
16
18
24
30
36
42
48
54
60
66
72
84
96
120
144
P-1930-BG
.500
.667
.750
1.000
1.250
1.500
1.750
2.000
2.250
2.500
2.750
3.000
3.500
4.000
5.000
6.000
04/10
.38
.50
.50
.25
.62
.25
.62
.25
B
.3125
.69
.31
C
.375
.75
.75
.75
.88
.88
.31
.31
.31
.38
.38
D
.1875
.250
A
G254
G256
G257
G258
G259
G261
G263
G264
G265
G266
G267
G268
G269
G270
G272
G274
09202
09204
09206
09208
09210
09212
09214
09216
09218
09220
09222
09224
09226
09228
09230
09232
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 50
Lubrication — 314
Materials — 315
Selection Procedure — 49
Boston Gear 800-825-6544
19
Spur Gears
24 and 20 Diametral Pitch (Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
No.
of
Teeth
A
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
Pitch
Dia.
Bore
Dia.
With Keyway
& Setscrew†
Catalog
Item
Number
Code
Face = .250"
Outside Dia. = Pitch Dia. + .083"
Overall Length = .250" + Hub Proj.
24
DIAMETRAL PITCH
STEEL
FACE
HUB
PROJ.
KEYWAY
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
12
15
16
18
21
24
30
36
42
48
60
72
12
14
15
16
18
20
21
24
30
36
42
48
60
72
96
120
144
.500
.625
.667
.750
.875
1.000
1.250
1.500
1.750
2.000
2.500
3.000
.500
.583
.625
.667
.750
.833
.875
1.000
1.250
1.500
1.750
2.000
2.500
3.000
4.000
5.000
6.000
.375
–
–
–
–
–
–
–
–
–
–
.500
–
–
.250
.3125
.250
.3125
.375
.500
.36
.46
.50
.54
.62
.70
.74
.87
1.00
1.12
1.12
1.25
1.25
1.38
2.00
2.25
2.25
.31
A
.31
.31
.38
.50
20
DIAMETRAL PITCH
S2412
09630
–
–
S2415
09632
–
–
S2416
09634
–
–
S2418
09636
–
–
S2421
09638
–
–
S2424
09640
–
–
S2430
09642
–
–
S2436
09644
–
–
S2442
09646
–
–
S2448
09648
–
–
S2460
09650
–
–
S2472
09652
–
–
–
–
H2412†
09596
–
–
H2414†
09598
–
–
H2415‡
09600
–
–
H2416
09602
–
–
H2418
09604
–
–
H2420
09606
–
–
H2421
09608
–
–
H2424
09610
–
–
H2430
09612
–
–
H2436
09614
–
–
H2442
09616
–
–
H2448
09618
–
–
H2460
09620
–
–
H2472
09622
–
–
H2496
09624
–
–
H24120
09626
–
–
H24144
09628
Face = .375"
Outside Dia. = Pitch Dia. + .100"
Overall Length = .375" + Hub Proj.
STEEL
11
12
13
14
15
16
18
.600*
.600
.650
.700
.750
.800
.900
20
1.000
22
1.100
24
1.200
25
1.250
28
1.400
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.
30
1.500
†H2412 & H2414 have #35 (.110) drilled hole through
one wall, no keyway.
32
1.600
35
1.750
36
1.800
40
2.000
48
50
60
64
2.400
2.500
3.000
3.200
24 D.P.
20 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 50, 51
Lubrication — 314
Materials — 315
Selection Procedure — 49
‡H2415-H24144 has one setscrew, no keyway.
**NA11B-5/16"-NA14B-5/16 bore has #35 (.110) drilled
hole through one wall, no keyway.
††3/8" & 1/2" bores have one setscrew, no keyway.
NA40-5/8" & NA40-3/4" bores have standard keyway
at 90° to setscrew. See Page 315.
20
Boston Gear 800-825-6544
.3125
.375
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.375
.500
.625
.750
.375
.46
.46
.50
.56
.60
.66
.74
.38
.38
.84
.38
.82
.38
.92
.38
.97
.38
1.12
.38
1.22
.38
1.32
.50
1.47
.50
1.52
.50
1.72
.50
1.33
1.42
1.92
2.12
.50
A
NA11B
NA12B
NA13B
NA14B
NA15B
NA16B
NA18B
NA20B
–
NA22B
–
NA24
–
NA25B
–
NA28B
–
NA30B
–
NA32
–
NA35
–
NA36
–
NA40
–
–
–
NA48A
NA50A
NA60A
NA64A
09662
09664
09666
09668
09670
09672
09674
09676
–
09678
–
09680
–
09682
–
09684
–
09686
–
09688
–
09690
–
09692
–
09694
–
–
–
10208
10210
10212
10214
NA11B-5/16** 46000
NA12B-5/16** 46001
NA13B-5/16** 46002
NA14B-5/16** 46003
NA15B-3/8†† 46004
NA16B-3/8†† 46005
NA18B-3/8†† 46006
NA20B-3/8†† 46007
NA20B-1/2†† 46008
NA22B-3/8†† 46009
NA22B-1/2†† 46010
NA24-3/8†† 46011
NA24-1/2†† 46012
NA25B-3/8†† 46013
NA25B-1/2†† 46014
NA28B-3/8†† 46015
NA28B-1/2†† 46016
NA30B-3/8†† 46017
NA30B-1/2†† 46018
NA32-3/8†† 46019
NA32-1/2†† 46020
NA35-3/8†† 46021
NA35-1/2†† 46022
NA36-3/8†† 46023
NA36-1/2†† 46024
NA40-3/8†† 46025
NA40-1/2†† 46026
NA40-5/8
46027
NA40-3/4
46028
–
–
–
–
–
–
–
–
P-1930-BG
04/10
Spur Gears
20 and 16 Diametral Pitch (Cast Iron, Brass & Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Pitch
Dia.
Bore
Dia.
DIAMETRAL PITCH
3.500
3.600
4.000
4.200
4.500
4.800
5.000
5.600
6.000
7.000
7.200
8.000
9.000
10.000
.375
1.25
.500
1.25
.500
1.50
2.25
16
DIAMETRAL PITCH
8
9
10
12
14
16
18
20
24
28
32
40
48
56
64
80
.500
.563
.625
.750
.875
1.000
1.125
1.250
1.500
1.750
2.000
2.500
3.000
3.500
4.000
5.000
11
12
13
14
15
16
18
.750*
.750
.813
.875
.938
1.000
1.125
20
1.250
22
1.375
24
1.500
26
1.625
28
1.750
30
1.875
P-1930-BG
.1875
–
.250
–
.3125
–
–
.3125
.75
.375
.88
1.00
1.00
.375
.500
.500
.625
.500
.625
.500
.625
.750
.500
.625
.750
.500
.625
.750
.875
.500
.625
.750
.875
1.000
04/10
With Keyway
and Setscrew†
Catalog
Item
Number
Code
A
Face = .375”
Outside Dia. = Pitch Dia. + .100”
Overall Length = .375” + Hub Proj.
20
70
72
80
84
90
96
100
112
120
140
144
160
180
200
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
No.
of
Teeth
.56
.56
.63
.69
.75
.81
.94
.96
1.08
1.20
1.33
1.45
1.58
CAST IRON
NA70
10216
–
–
.50
NA72
10218
–
–
B
NA80
10220
–
–
NA84
10222
–
–
.50
NA90
10224
–
–
C
NA96
10226
–
–
NA100
10228
–
–
NA112
10230
–
–
NA120
10232
–
–
.50
NA140
10234
–
–
D
NA144
10236
–
–
NA160
10238
–
–
.62
NA180
10240
–
–
NA200B 10242
–
–
Face = .313"
Outside Dia. = Pitch Dia. + .125"
Overall Length = Face + Hub Proj.
BRASS
G226
09168
–
–
–
G227
09170
–
–
G228
09172
–
–
G229
09174
–
–
A
G230
09176
–
–
–
G231
09178
–
–
G232
09180
–
–
G233
09182
–
–
–
G235
09184
–
–
–
G236
09186
–
–
B
G237
09188
–
–
.31
G238
09190
–
–
G239
09192
–
–
D
G240
09194
–
–
.38
G241
09196
–
–
G242
09198
–
–
STEEL
Face = .500"
NB11B 09704 NB11B-3/8† 46029
NB12B 09706 NB12B-3/8† 46030
.44
NB13B 09708 NB13B-3/8† 46031
NB14B 09710 NB14B-3/8† 46032
NB15B 09712 NB15B-1/2† 46033
.44
NB16B 09714 NB16B-1/2† 46034
NB18B 09716 NB18B-1/2† 46035
NB20B
09718 NB20B-1/2† 46036
.44
–
–
NB20B-5/8 46037
NB22B 09720 NB22B-1/2† 46038
.44
–
–
NB22B-5/8 46039
NB24B 09722 NB24B-1/2† 46040
.44
A
–
–
NB24B-5/8 46041
–
–
NB24B-3/4 46042
NB26B 09724 NB26B-1/2† 46043
.44
–
–
NB26B-5/8 46044
–
–
NB26B-3/4 40645
NB28B 09726 NB28B-1/2† 46046
–
–
NB28B-5/8 46047
.50
–
–
NB28B-3/4 46048
–
–
NB28B-7/8 46049
NB30B 09728 NB30B-1/2† 46050
–
–
NB30B-5/8 46051
.50
–
–
NB30B-3/4 46052
–
–
NB30B-7/8 46053
–
–
NB30B-1
46054
HUB
PROJ.
FACE
KEYWAY
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
20 D.P.
TOLERANCE
±.0005
16 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 51, 52
Lubrication — 314
Materials — 315
Selection Procedure — 49
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.
†3/8" and 1/2" bores have one setscrew, no keyway.
5/8" bore and larger have standard keyway at 90° to
setscrew. See Page 315.
Boston Gear 800-825-6544
21
Spur Gears
16 and 12 Diametral Pitch (Steel, Non-Metallic & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
Pitch
Dia.
Bore
Dia.
With Keyway
and Setscrew†
Catalog
Item
Number
Code
Face = .500"
Outside Dia. = Pitch Dia. + .125"
Overall Length = .500" + Hub Proj.
16
DIAMETRAL PITCH
STEEL
HUB
PROJ.
FACE
KEYWAY
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
32
2.000
.500
.625
.750
.875
1.000
36
40
48
2.250
2.500
3.000
.500
16
20
24
32
40
48
64
1.000
1.250
1.500
2.000
2.500
3.000
4.000
54
56
60
64
72
80
84
96
112
120
128
144
160
192
3.375
3.500
3.750
4.000
4.500
5.000
5.250
6.000
7.000
7.500
8.000
9.000
10.000
12.000
.375
.500
.500
.625
.625
1.70
1.95
1.69
2.19
.81
1.06
1.31
1.81
–
–
–
1.25
1.25
1.38
1.38
1.38
1.50
1.50
1.50
1.50
1.50
1.50
1.75
1.75
2.00
12
DIAMETRAL PITCH
16 D.P.
12 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 52, 53
Lubrication — 314
Materials — 315
Selection Procedure — 49
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.
11
12
13
14
15
16
18
1.000*
1.000
1.083
1.167
1.250
1.333
1.500
20
1.667
21
1.750
22
1.833
24
2.000
30
32
36
40
42
2.500
2.667
3.000
3.333
3.500
†1/2" bore has one setscrew, no keyway.
5/8" bore and larger have standard keyway at 90° to
setscrew. See Page 315.
22
Boston Gear 800-825-6544
.500
.625
.625
.750
.625
.750
.875
.625
.750
.875
1.000
.625
.750
.875
1.000
.625
.75
.75
.83
.92
1.00
.99
1.15
1.32
1.40
1.49
1.65
2.15
1.92
2.25
2.34
2.50
NB32
09730 NB32-1/2 46055
–
–
NB32-5/8 46056
.50
–
–
NB32-3/4 46057
A
–
–
NB32-7/8 46058
–
–
NB32-1
46059
NB36
09732
–
–
.50
NB40A 10244
–
–
NB48A 10246
–
–
NON-METALLIC
QBH16 09014
–
–
.50
QBH20 09018
–
–
.50
QBH24 09022
–
–
.50
A
QBH32 09024
–
–
–
QB40
09000
–
–
–
QB48
09002
–
–
–
QB64
09006
–
–
CAST IRON
.50
NB54
10248
–
–
.50
B
NB56
10250
–
–
.62
NB60
10252
–
–
NB64
10254
–
–
NB72
10256
–
–
C
NB80
10258
–
–
.62
NB84
10260
–
–
NB96
10262
–
–
NB112 10264
–
–
NB120 10266
–
–
D
NB128 10268
–
–
NB144 10270
–
–
.75
NB160B 10272
–
–
NB192B 10274
–
–
Face = .750"
Outside Dia. = Pitch Dia. + .167"
Overall Length = .750" + Hub Proj.
STEEL
ND11B 09744 ND11B-1/2† 46060
ND12B
09746 ND12B-1/2† 46061
.50
ND13B 09748 ND13B-1/2† 46062
ND14B 09750 ND14B-1/2† 46063
ND15B 09752 ND15B-5/8 46064
.50
ND16B 09754 ND16B-5/8 46065
ND18B 09756 ND18B-5/8 46066
ND20B 09758 ND20B-5/8 46067
.50
–
–
ND20B-3/4 46068
ND21B 09760 ND21B-5/8 46069
.50
–
–
ND21B-3/4 46070
A
–
–
ND21B-7/8 46071
ND22B 09762 ND22B-5/8 46072
–
–
ND22B-3/4 46073
.50
–
–
ND22B-7/8 46074
–
–
ND22B-1
46075
ND24B 09764 ND24B-5/8 46076
–
–
ND24B-3/4 46077
.50
–
–
ND24B-7/8 46078
.62
–
ND30
ND32A
ND36A
ND40A
ND42A
–
ND24B-1
09766
–
10276
–
10278
–
10280
–
10282
–
P-1930-BG
46079
–
–
–
–
–
04/10
Spur Gears
12 and 10 Diametral Pitch (Steel, Non-Metallic & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
Pitch
Dia.
Bore
Dia.
12
DIAMETRAL PITCH
15
18
21
24
30
36
48
60
1.250
1.500
1.750
2.000
2.500
3.000
4.000
5.000
48
54
60
64
72
84
96
108
112
120
144
168
4.000
4.500
5.000
5.333
6.000
7.000
8.000
9.000
9.333
10.000
12.000
14.000
.500
.625
.750
.750
1.00
1.25
1.50
1.75
2.25
–
–
–
1.75
.750
2.00
.875
2.00
With Keyway
and Setscrew†
Catalog
Item
Number
Code
Face = .750"
Outside Dia. = Pitch Dia. + .167"
Overall Length = .750" + Hub Proj.
NON-METALLIC
QDH15 09038
–
–
.50
QDH18 09042
–
–
QDH21 09046
–
–
QDH24 09050
–
–
.50
A
QDH30 09052
–
–
–
QD36
09026
–
–
–
QD48
09030
–
–
–
QD60
09034
–
–
CAST-IRON
ND48
10284
–
–
C
ND54
10286
–
–
ND60
10288
–
–
.75
ND64
10290
–
–
ND72
10292
–
–
ND84
10294
–
–
ND96
10296
–
–
D
ND108 10298
–
–
.75
ND112 10300
–
–
A
FACE
PITCH
DIA.
BORE
ND120
ND144
ND168
10302
–
–
10304
–
–
10306
–
–
Face = 1.000"
Outside Dia. = Pitch Dia. + .200"
Overall Length = 1.000" + Hub Proj.
1.00
10
DIAMETRAL PITCH
HUB
PROJ.
HUB
DIA.
OVERALL
LENGTH
STEEL
11
12
14
15
16
1.200*
1.200
1.400
1.500
1.600
18
1.800
20
2.000
24
2.400
25
28
30
32
35
36
2.500
2.800
3.000
3.200
3.500
3.600
15
18
20
25
30
1.500
1.800
2.000
2.500
3.000
.625
.750
.750
.875
.750
.875
1.000
.750
.875
1.000
.750
.750
.625
.750
.92
.92
1.02
1.12
1.22
1.42
1.62
2.02
2.12
1.81
2.02
2.22
2.52
2.61
1.20
1.50
1.70
2.20
2.70
NF11B
NF12B
NF14B
NF15B
.62
NF16B
NF18B
.62
–
NF20B
.62
–
A
–
NF24B
.62
–
–
.62
NF25
NF28A
NF30A
.88
NF32A
NF35A
NF36A
NON-METALLIC
QFH15
.62
QFH18
A
QFH20
.62
QFH25
QFH30
.62
09778
09780
09782
09784
09786
09788
–
09790
–
–
09792
–
–
09794
10310
10312
10314
10316
10318
NF11B-5/8
NF12B-5/8
NF14B-5/8
NF15B-3/4
NF16B-3/4
NF18B-3/4
NF18B-7/8
NF20B-3/4
NF20B-7/8
NF20B-1
NF24B-3/4
NF24B-7/8
NF24B-1
–
–
–
–
–
–
46080
46081
46082
46083
46084
46085
46086
46087
46088
46089
46090
46091
46092
–
–
–
–
–
–
09062
09066
09068
09070
09072
–
–
–
–
–
–
–
–
–
–
STANDARD TOLERANCES
DIMENSION
BORE
All
12 D.P.
TOLERANCE
±.0005
10 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 53, 54
Lubrication — 314
Materials — 315
Selection Procedure — 49
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.
†All gears have standard keyway at 90° to setscrew.
See Page 315.
P-1930-BG
04/10
Boston Gear 800-825-6544
23
Spur Gears
10 and 8 Diametral Pitch (Cast Iron, Steel & Non-Metallic)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Pitch
Dia.
Bore
Dia.
DIAMETRAL PITCH
HUB
PROJ.
FACE
KEYWAY
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
4.000
4.200
4.500
4.800
5.000
5.400
5.500
6.000
6.400
7.000
7.200
8.000
8.400
9.000
9.600
10.000
11.000
12.000
14.000
14.400
16.000
18.000
2.12
.875
2.25
2.25
1.00
2.50
2.75
8
DIAMETRAL PITCH
STANDARD TOLERANCES
DIMENSION
BORE
All
10 D.P.
TOLERANCE
±.0005
11
12
14
15
1.500*
1.500
1.750
1.875
16
2.000
18
2.250
20
2.500
22
2.750
24
28
30
32
3.000
3.500
3.750
4.000
16
18
20
24
28
2.000
2.250
2.500
3.000
3.500
8 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 54, 55
Lubrication — 314
Materials — 315
Selection Procedure — 49
.750
.875
.875
1.000
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
.750
.875
With Keyway
and Setscrew†
Catalog
Item
Number
Code
Face = 1.000"
Outside Dia. = Pitch Dia. + .200"
Overall Length = 1.000" + Hub Proj.
10
40
42
45
48
50
54
55
60
64
70
72
80
84
90
96
100
110
120
140
144
160
180
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
1.12
1.12
1.31
1.43
1.56
1.81
2.06
2.31
2.06
2.56
2.75
3.00
1.62
1.88
2.12
2.62
3.12
CAST IRON
NF40
10320
–
–
NF42
10322
–
–
B
NF45
10324
–
–
NF48
10326
–
–
NF50
10328
–
–
C
NF54
10330
–
–
.88
NF55
10332
–
–
NF60
10334
–
–
NF64
10336
–
–
NF70
10338
–
–
NF72
10340
–
–
NF80
10342
–
–
NF84
10344
–
–
D
NF90
10346
–
–
NF96
10348
–
–
.88
NF100
10350
–
–
NF110
10352
–
–
NF120
10356
–
–
NF140
10358
–
–
1.00
NF144
10360
–
–
NF160
10362
–
–
NF180
10364
–
–
Face = 1.250"
Outside Dia. = Pitch Dia. + .250"
Overall Length = 1.250" + Hub Proj.
STEEL
NH11B 09806 NH11B-3/4 46093
.75
NH12B 09808 NH12B-3/4 46094
NH14B 09810 NH14B-3/4 46095
.75
NH15B 09812 NH15B-7/8 46096
NH16B 09814 NH16B-7/8 46097
.75
–
–
NH16B-1
46098
NH18B 09816 NH18B-7/8 46099
.75
–
–
NH18B-1
46100
–
–
NH18B-1-1/8 46101
A
NH20B 09818 NH20B-7/8 46102
.75
–
–
NH20B-1
46103
–
–
NH20B-1-1/8 46104
NH22B 09820 NH22B-7/8 46105
.75
–
–
NH22B-1
46106
–
–
NH22B-1-1/8 46107
NH24A 10368
–
–
.88
NH28A 10370
–
–
NH30A 10372
–
–
.88
NH32A 10374
–
–
NON-METALLIC
QHH16 09082
–
–
.75
QHH18 09084
–
–
A
QHH20 09086
–
–
.75
QHH24 09088
–
–
QHH28 09090
–
–
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.
†All gears have standard keyway, at 90° to setscrew.
See Page 315.
24
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
8 and 6 Diametral Pitch (Cast Iron & Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Pitch
Dia.
Bore
Dia.
DIAMETRAL PITCH
4.500
5.000
5.250
5.500
6.000
6.750
7.000
7.500
8.000
9.000
10.000
10.500
11.000
12.000
14.000
15.000
16.000
18.000
20.000
1.000
1.125
1.125
2.50
3.00
3.25
6
DIAMETRAL PITCH
11
12
14
15
16
18
20
21
24
27
30
2.000* 1.000
2.000
1.000
2.333 1.125
1.000
2.500 1.125
1.1875
1.250
1.000
2.667 1.125
1.1875
1.250
1.000
3.000 1.125
1.1875
1.250
1.000
3.333 1.125
1.1875
1.250
3.500 1.000
4.000
4.500 1.125
5.000
With Keyway
and Setscrew†
Catalog
Item
Number
Code
A
Face = 1.250"
Outside Dia. = Pitch Dia. + .250"
Overall Length = 1.250" + Hub Proj.
8
36
40
42
44
48
54
56
60
64
72
80
84
88
96
112
120
128
144
160
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
No.
of
Teeth
1.46
1.79
1.96
2.13
2.46
2.79
2.96
3.00
3.50
4.00
CAST IRON
NH36
10376
–
–
NH40
10378
–
–
B
NH42
10380
–
–
NH44
10382
–
–
NH48
10384
–
–
1.00
C
NH54
10386
–
–
NH56
10388
–
–
NH60
10390
–
–
NH64
10392
–
–
NH72
10394
–
–
NH80
10396
–
–
NH84
10398
–
–
D
NH88
10400
–
–
NH96
10402
–
–
1.12
NH112 10404
–
–
NH120 10406
–
–
NH128 10408
–
–
NH144 10410
–
–
1.25
NH160B 10412
–
–
Face = 1.500"
Outside Dia. = Pitch Dia + .333"
Overall Length = 1.500" + Hub Proj.
STEEL
NJ11B
09830 NJ11B-1
46108
.88
NJ12B
09832 NJ12B-1
46109
NJ14B
09834
NJ14B-1
46110
.88
–
–
NJ14B-1-1/8 46111
NJ15B
09836 NJ15B-1
46112
–
–
NJ15B-1-1/8 46113
.88
–
–
NJ15B-1-3/16 46114
–
–
NJ15B-1-1/4 46115
NJ16B
09838 NJ16B-1
46116
–
–
NJ16B-1-1/8 46117
.88
A
–
–
NJ16B-1-3/16 46118
–
–
NJ16B-1-1/4 46119
NJ18B
09840 NJ18B-1
46120
–
–
NJ18B-1-1/8 46121
.88
–
–
NJ18B-1-3/16 46122
–
–
NJ18B-1-1/4 46123
NJ20
09842 NJ20-1
46124
–
–
NJ20-1-1/8 46125
.88
–
–
NJ20-1-3/16 46126
–
–
NJ20-1-1/4 46127
.88
NJ21B
09844
–
–
NJ24A
10414
–
–
.88
NJ27A
10416
–
–
NJ30A
10418
–
–
FACE
PITCH
DIA.
HUB
PROJ.
BORE
HUB
DIA.
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
8 D.P.
TOLERANCE
±.0005
6 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 55, 56
Lubrication — 314
Materials — 315
Selection Procedure — 49
*Special Pitch Diameter, used for calculating Center
Distance only, not Ratio.
†All gears have standard keyway, at 90° to setscrew.
See Page 315.
P-1930-BG
04/10
Boston Gear 800-825-6544
25
Spur Gears
6 and 5 Diametral Pitch (Steel & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Hub
Pitch
Dia.
Bore
Dia.
Proj.
Style
See
Page
315
Without Keyway
or Setscrew
Catalog
Item
Number
Code
Face = 1.500˝
Outside Dia. = Pitch Dia + .333˝
Overall Length = 1.500˝ + Hub Proj.
6
DIAMETRAL PITCH
CAST IRON
FACE
PITCH
DIA.
32
33
36
40
42
48
54
60
64
66
72
84
96
108
120
144
HUB
PROJ.
HUB
DIA.
BORE
5.333
5.500
6.000
6.667
7.000
8.000
9.000
10.000
10.667
11.000
12.000
14.000
16.000
18.000
20.000
24.000
B
1.125
2.50
1.00
C
1.25
D
3.00
1.250
3.25
3.50
3.75
1.50
STANDARD TOLERANCES
DIMENSION
BORE
All
6 D.P.
TOLERANCE
±.0005
5 D.P.
11
12
14
15
16
18
20
2.400*
2.400
2.800
3.000
3.200
3.600
4.000
24
25
30
35
40
45
50
55
60
70
80
100
4.800
5.000
6.000
7.000
8.000
9.000
10.000
11.000
12.000
14.000
16.000
20.000
10420
10422
10424
10426
10428
10430
10432
10434
10436
10438
10440
10442
10444
10446
10448
10452
Face = 1.750"
Outside Dia. = Pitch Dia. + .400"
Overall Length = 1.750" + Hub Proj.
5
DIAMETRAL PITCH
OVERALL
LENGTH
NJ32
NJ33
NJ36
NJ40
NJ42
NJ48
NJ54
NJ60
NJ64
NJ66
NJ72
NJ84
NJ96
NJ108
NJ120B
NJ144B
1.0625
STEEL
1.78
1.78
2.18
2.38
.88
2.58
2.98
3.38
CAST IRON
1.0625
3.00
1.25
1.1875
3.00
1.25
1.1875
3.50
1.25
1.3125
3.75
1.50
A
A
B
D
NK11B
NK12B
NK14B
NK15B
NK16B
NK18B
NK20B
09846
09848
09850
09852
09854
09856
09858
NK24B
NK25B
NK30B
NK35B
NK40B
NK45B
NK50B
NK55B
NK60B
NK70B
NK80B
NK100B
10454
10456
10458
10460
10462
10464
10466
10468
10470
10472
10474
10478
*Special Pitch Diameter, used for calculating Center Distance only, not Ratio.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 56
Lubrication — 314
Materials — 315
Selection Procedure — 49
26
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
4 and 3 Diametral Pitch (Steel & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Hub
Pitch
Dia.
Bore
Dia.
Proj.
DIAMETRAL PITCH
3.000*
3.000
3.500
3.750
4.000
4.500
5.000
5.500
24
28
30
32
36
40
42
44
48
54
56
60
64
72
80
84
88
96
6.000
7.000
7.500
8.000
9.000
10.000
10.500
11.000
12.000
13.500
14.000
15.000
16.000
18.000
20.000
21.000
22.000
24.000
1.125
1.125
1.250
1.375
3
DIAMETRAL PITCH
11
12
14
15
16
18
20
21
4.000*
4.000
4.667
5.000
5.333
6.000
6.667
7.000
24
30
36
42
48
54
60
72
84
96
108
8.000
10.000
12.000
14.000
16.000
18.000
20.000
24.000
28.000
32.000
36.000
Without Keyway
or Setscrew
Catalog
Item
Number
Code
1.3125
1.4375
1.5625
1.6875
1.9375
STEEL
2.27
2.27
2.77
3.02
.88
3.27
3.77
4.27
4.77
CAST IRON
A
A
04/10
NL11B
NL12B
NL14B
NL15B
NL16B
NL18B
NL20B
NL22B
09860
09862
09864
09866
09868
09870
09872
09874
NL24B
10484
NL28B
10486
3.50
NL30
10488
B
NL32B
10490
NL36B
10492
NL40B
10494
C
NL42
10496
1.50
NL44B
10498
NL48B
10500
4.00
NL54
10502
NL56B
10504
NL60
10506
D
NL64B
10508
NL72B
10510
NL80B
10512
1.50
NL84
10514
4.50
NL88B
10516
1.75
NL96B
10518
Face = 3.000"†
Outside Dia. = Pitch Dia. + .667"
Overall Length = Face + Hub Proj.
STEEL
NO11B†
09876
NO12B†
09878
NO14B
09880
NO15B
09882
–
–
A
NO16B
09884
NO18B
09886
NO20
09888
NO21B
09890
CAST IRON
4.50
NO24B
10524
1.25
B
NO30B
10526
5.25
NO36B
10528
1.75
C
NO42
10530
NO48B
10532
5.25
1.75
NO54
10534
NO60B
10536
5.50
D
NO72B
10538
1.75
5.75
NO84B
10540
NO96B
10542
5.75
1.75
NO108B
10544
*Special Pitch Diameter, used for calculating Center Distance only, not Ratio.
†NO11B and NO12B have 4" Face.
P-1930-BG
A
Face = 2.000"
Outside Dia. = Pitch Dia. + .500"
Overall Length = 2.000" + Hub Proj.
4
11
12
14
15
16
18
20
22
Style
See
Page
315
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
4 D.P.
TOLERANCE
±.0005
3 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 56, 57
Lubrication — 314
Materials — 315
Selection Procedure — 49
Boston Gear 800-825-6544
27
Change Gears
20 Diametral Pitch (Steel & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
No.
of
Teeth
A
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
No.
of
Teeth
20
DIAMETRAL PITCH
.375 FACE
PITCH
DIA.
1
1
(2) 8 × 16 KEYWAYS
180° APART
HUB
DIA.
.625 BORE
REFERENCE PAGES
20 D.P.
Alterations — 314
Horsepower Ratings — 51
Lubrication — 314
Materials — 315
Selection Procedure — 49
COMPOUND
STEEL BUSHINGS
These steel bushings have 2 keys, 180°
apart and fit bores of GA series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.4370
.4380
.125
.737
.733
.625
.750
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
STEEL
1.000
GA20
1.050
GA21
1.100
GA22
1.150
GA23
1.200
GA24
1.250
GA25
1.300
GA26
1.350
GA27
1.400
GA28
1.450
GA29
1.500
GA30
1.550
GA31
1.600
GA32
1.650
GA33
1.700
–
GA34
1.750
GA35
1.800
GA36
1.850
GA37
1.900
GA38
1.950
GA39
2.000
GA40
2.050
GA41
2.100
GA42
2.150
GA43
2.200
GA44
2.250
GA45
2.300
GA46
2.350
GA47
2.400
GA48
2.450
GA49
2.500
GA50
CAST IRON
2.550
GA51B
2.600
GA52B
2.650
GA53B
2.700
GA54B
2.750
GA55B
2.800
GA56B
2.850
GA57B
2.900 1.38
GA58B
2.950
GA59B
3.000
GA60B
3.050
GA61B
3.100
GA62B
3.150
GA63B
3.200
GA64B
3.250
GA65B
3.300
GA66B
3.350 1.56
GA67B
3.400
GA68B
3.450
GA69B
3.500
GA70B
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
Outside Dia. = Pitch Dia. +.100"
10038
10040
10042
10044
10046
10048
10050
10052
10054
10056
10058
10060
10062
10064
10066
10068
10070
10072
10074
10076
10078
10080
10082
10084
10086
10088
10090
10092
10094
10096
10098
10802
10804
10806
10808
10810
10812
10814
10816
10818
10820
10822
10824
10826
10828
10830
10832
10834
10836
10838
10840
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CAST IRON
3.550
GA71B
3.600
GA72B
3.650
GA73B
3.700
GA74B
3.750 1.56 GA75B
3.800
GA76B
3.850
GA77B
3.900
GA78B
3.950
GA79B
4.000
GA80B
4.050
GA81B
4.100
GA82B
4.150
GA83B
4.200
GA84B
4.250
GA85B
4.300
GA86B
4.350
GA87B
4.400
GA88B
4.450
GA89B
4.500
GA90B
4.550
GA91B
4.600
GA92B
4.650
GA93B
4.700
GA94B
4.750
GA95B
4.800
GA96B
4.850
GA97B
4.900 1.69 GA98B
4.950
GA99B
5.000
GA100B
5.050
GA101B
5.100
GA102B
5.150
GA103B
5.200
GA104B
5.250
GA105B
5.300
GA106B
5.350
GA107B
5.400
GA108B
5.450
GA109B
5.500
GA110B
5.550
GA111B
5.600
GA112B
5.650
GA113B
5.700
GA114B
5.750
GA115B
5.800
GA116B
5.850
GA117B
5.900
GA118B
5.950
GA119B
6.000
GA120B
Style
See
Page
315
10842
10844
10846
10848
10850
10852
10854
10856
10858
10860
10862
10864
10866
10868
10870
10872
10874
10876
10878
10880
10882
10884
10886
10888
10890
10892
10894
10896
10898
10900
10902
10904
10906
10908
10910
10912
10914
10916
10918
10920
10922
10924
10926
10928
10930
10932
10934
10936
10938
10940
20 – 78 Teeth – A
79 – 120 Teeth – C
ORDER BY CATALOG NUMBER
OR ITEM CODE
28
CATALOG NO.
ITEM CODE
GAB20A
18500
Boston Gear 800-825-6544
P-1930-BG
04/10
Change Gears
16 Diametral Pitch (Steel & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
No.
of
Teeth
16
DIAMETRAL PITCH
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
STEEL
1.250
GB20
1.313
GB21
1.375
GB22
1.438
GB23
1.500
GB24
1.563
GB25
1.625
GB26
1.688
GB27
1.750
GB28
1.813
GB29
1.875
–
GB30
1.938
GB31
2.000
GB32
2.063
GB33
2.125
GB34
2.188
GB35
2.250
GB36
2.313
GB37
2.375
GB38
2.438
GB39
2.500
GB40
CAST IRON
2.563
GB41B
2.625
GB42B
2.688
GB43B
2.750
GB44B
2.913
GB45B
2.875
GB46B
2.938 1.56 GB47B
3.000
GB48B
3.063
GB49B
3.125
GB50B
3.188
GB51B
3.250
GB52B
3.313
GB53B
3.375
GB54B
3.438
GB55B
3.500
GB56B
3.563
GB57B
3.625
GB58B
3.688
GB59B
3.750
GB60B
3.813
GB61B
3.875
GB62B
3.938
GB63B
4.000 1.81 GB64B
4.063
GB65B
4.125
GB66B
4.188
GB67B
4.250
GB68B
4.313
GB69B
4.375
GB70B
4.438
GB71B
4.500
GB72B
4.563
GB73B
4.625
GB74B
4.688
GB75B
Pitch
Dia.
Hub Catalog
Dia. Number
A
Item
Code
Outside Dia. = Pitch Dia. +.125"
10100
10102
10104
10106
10108
10110
10112
10114
10116
10118
10120
10122
10124
10126
10128
10130
10132
10134
10136
10138
10140
10942
10944
10946
10948
10950
10952
10954
10956
10958
10960
10962
10964
10966
10968
10970
10972
10974
10976
10978
10980
10982
10984
10986
10988
10990
10992
10994
10996
10998
11000
11002
11004
11006
11008
11010
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
CAST IRON
4.750
GB76B
4.813
GB77B
4.875
GB78B
4.938
GB79B
5.000
GB80B
5.063
GB81B
5.125
GB82A
5.188
GB83A
5.250
GB84A
5.313
GB85A
5.375
GB86A
5.438
GB87A
5.500
GB88A
5.563
GB89A
5.625
GB90A
5.688
GB91A
5.750
GB92A
5.813
GB93A
5.875
GB94A
5.938
GB95A
6.000
GB96A
6.063
GB97A
6.125
GB98A
6.188
GB99A
6.250
GB100A
6.313 1.81 GB101A
6.375
GB102A
6.438
GB103A
6.500
GB104A
6.563
GB105A
6.625
GB106A
6.688
GB107A
6.750
GB108A
6.913
GB109A
6.975
GB110A
6.938
GB111A
7.000
GB112A
7.063
GB113A
7.125
GB114A
7.188
GB115A
7.250
GB116A
7.313
GB117A
7.375
GB118A
7.438
GB119A
7.500
GB120A
7.563
GB121A
7.625
GB122A
7.688
GB123A
7.750
GB124A
7.813
GB125A
7.875
GB126A
7.938
GB127A
8.000
GB128A
Style
See
Page
315
11012
11014
11016
11018
11020
11022
11024
11026
11028
11030
11032
11034
11036
11038
11040
11042
11044
11046
11048
11050
11052
11054
11056
11058
11060
11062
11064
11066
11068
11070
11072
11074
11076
11078
11080
11082
11084
11086
11088
11090
11092
11094
11096
11098
11100
11102
11104
11106
11108
11110
11112
11114
11116
20 – 79 Teeth – A
3
3
×
KEYWAYS
16 32
180° APART
.500 FACE
PITCH
DIA.
(2)
HUB
DIA.
.750 BORE
REFERENCE PAGES
16 D.P.
Alterations — 314
Horsepower Ratings — 52
Lubrication — 314
Materials — 315
Selection Procedure — 49
COMPOUND
STEEL BUSHINGS
These steel bushings have 2 keys, 180°
apart and fit bores of GB series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.4995
.5005
.188
.914
.910
.750
1.000
80 – 128 Teeth – C
ORDER BY CATALOG NUMBER
OR ITEM CODE
P-1930-BG
04/10
CATALOG NO.
ITEM CODE
GBB16A
18502
Boston Gear 800-825-6544
29
Change Gears
12 Diametral Pitch (Steel & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
A
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
No.
of
Teeth
12
DIAMETRAL PITCH
1 1
(2) – × – KEYWAYS
4 8
180° APART
.750 FACE
PITCH
DIA.
HUB
DIA.
1.000 BORE
REFERENCE PAGES
12 D.P.
Alterations — 314
Horsepower Ratings — 53
Lubrication — 314
Materials — 315
Selection Procedure — 49
Compound
Steel Bushings
These steel bushings have 2 keys, 180°
apart and fit bores of GD series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.7495
.7505
.250
1.217
1.213
1.000
1.50
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
STEEL
1.667
GD20
1.750
GD21
1.833
GD22
1.917
GD23
2.000
GD24
2.083
GD25
2.167
GD26
2.250
GD27
2.333
–
GD28
2.417
GD29
2.500
GD30
2.583
GD31
2.667
GD32
2.750
GD33
2.833
GD34
2.971
GD35
3.000
GD36
CAST IRON
3.083
GD37A
3.167
GD38A
3.250
GD39A
3.333
GD40A
3.417
GD41A
3.500 1.76 GD42A
3.583
GD43A
3.667
GD44A
3.750
GD45A
3.833
GD46A
3.917
GD47A
4.000
GD48A
4.083
GD49A
4.167
GD50A
4.250
GD51A
4.333
GD52A
4.417
GD53A
4.500
GD54A
4.583
GD55A
4.667
GD56A
4.750
GD57A
4.833
GD58A
4.917
GD59A
5.000
GD60A
5.083 2.19 GD61A
5.167
GD62A
5.250
GD63A
5.333
GD64A
5.417
GD65A
5.500
GD66A
5.583
GD67A
5.667
GD68A
5.750
GD69A
5.833
GD70A
5.917
GD71A
6.000
GD72A
6.083
GD73A
6.167
GD74A
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
Outside Dia. = Pitch Dia. +.167"
10142
10144
10146
10148
10150
10152
10154
10156
10158
10160
10162
10164
10166
10168
10170
10172
10174
11118
11120
11122
11124
11126
11128
11130
11132
11134
11136
11138
11140
11142
11144
11146
11148
11150
11152
11154
11156
11158
11160
11162
11164
11166
11168
11170
11172
11174
11176
11178
11180
11182
11184
11186
11188
11190
11192
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CAST IRON
6.250
GD75A
6.333
GD76A
6.417
GD77A
6.500
GD78A
6.583 2.19 GD79A
6.667
GD80A
6.750
GD81A
6.833
GD82A
6.917
GD83A
7.000
GD84A
7.083
GD85A
7.167
GD86A
7.250
GD87A
7.333
GD88A
7.417
GD89A
7.500
GD90A
7.583
GD91A
7.667
GD92A
7.750
GD93A
7.833
GD94A
7.917
GD95A
8.000
GD96A
8.083
GD97A
8.167
GD98A
8.250
GD99A
8.333 2.44 GD100A
8.417
GD101A
8.500
GD102A
8.583
GD103A
8.667
GD104A
8.750
GD105A
8.833
GD106A
8.917
GD107A
9.000
GD108A
9.083
GD109A
9.167
GD110A
9.250
GD111A
9.333
GD112A
9.417
GD113A
9.500
GD114A
9.583
GD115A
9.667
GD116A
9.750
GD117A
9.833
GD118A
9.917
GD119A
10.000
GD120A
Style
See
Page
315
11194
11196
11198
11200
11202
11204
11206
11208
11210
11212
11214
11216
11218
11220
11222
11224
11226
11228
11230
11232
11234
11236
11238
11240
11242
11244
11246
11248
11250
11252
11254
11256
11258
11260
11262
11264
11266
11268
11270
11272
11274
11276
11278
11280
11282
11284
20 – 60 Teeth – A
61 – 120 Teeth – C
ORDER BY CATALOG NUMBER
OR ITEM CODE
30
CATALOG NO.
ITEM CODE
GDB12A
18504
Boston Gear 800-825-6544
P-1930-BG
04/10
Change Gears
10 Diametral Pitch (Steel & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
No.
of
Teeth
10
DIAMETRAL PITCH
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
STEEL
2.000
GF20
2.100
GF21
2.200
GF22
2.300
GF23
2.400
GF24
2.500
–
GF25
2.600
GF26
2.700
GF27
2.800
GF28
2.900
GF29
3.000
GF30
CAST IRON
3.100
GF31B
3.200
GF32B
3.300
GF33B
3.400
GF34B
3.500
GF35B
3.600 1.94 GF36B
3.700
GF37B
3.800
GF38B
3.900
GF39B
4.000
GF40B
4.100
GF41B
4.200
GF42B
4.300
GF43B
4.400
GF44B
4.500
GF45B
4.600
GF46B
4.700
GF47B
4.800 2.68 GF48B
4.900
GF49B
5.000
GF50B
5.100
GF51B
5.200
GF52A
5.300
GF53A
5.400
GF54A
5.500
GF55A
5.600
GF56A
5.700 3.12 GF57A
5.800
GF58A
5.900
GF59A
6.000
GF60A
Pitch
Dia.
Hub Catalog
Dia. Number
A
Item
Code
Outside Dia. = Pitch Dia. +.200"
10176
10178
10180
10182
10184
10186
10188
10190
10192
10194
10196
11286
11288
11290
11292
11294
11296
11298
11300
11302
11304
11306
11308
11310
11312
11314
11316
11318
11320
11322
11324
11326
11328
11330
11332
11334
11336
11338
11340
11342
11344
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
CAST IRON
6.100
GF61A
6.200
GF62A
6.300
GF63A
6.400
GF64A
6.500
GF65A
6.600
GF66A
6.700
GF67A
6.800
GF68A
6.900
GF69A
7.000
GF70A
7.100
GF71A
7.200
GF72A
7.300
GF73A
7.400
GF74A
7.500
GF75A
7.600
GF76A
7.700
GF77A
7.800
GF78A
7.900
GF79A
8.000
GF80A
8.100 3.12 GF81A
8.200
GF82A
8.300
GF83A
8.400
GF84A
8.500
GF85A
8.600
GF86A
8.700
GF87A
8.800
GF88A
8.900
GF89A
9.000
GF90A
9.100
GF91A
9.200
GF92A
9.300
GF93A
9.400
GF94A
9.500
GF95A
9.600
GF96A
9.700
GF97A
9.800
GF98A
9.900
GF99A
10.000
GF100A
Style
See
Page
315
11346
11348
11350
11352
11354
11356
11358
11360
11362
11364
11366
11368
11370
11372
11374
11376
11378
11380
11382
11384
11386
11388
11390
11392
11394
11396
11398
11400
11402
11404
11406
11408
11410
11412
11414
11416
11418
11420
11422
11424
20 – 60 Teeth – A
61 – 66 Teeth – B
67 – 100 Teeth – C
5
5
×
KEYWAYS
16 32
180° APART
1.000" FACE
PITCH
DIA.
(2)
HUB
DIA.
1.250 BORE
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 54
Lubrication — 314
Materials — 315
Selection Procedure — 49
10 D.P.
Compound
Steel Bushings
These steel bushings have 2 keys, 180°
apart and fit bores of GF series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
.9995
1.0005
.313
1.523
1.519
1.250
2.000
ORDER BY CATALOG NUMBER
OR ITEM CODE
P-1930-BG
04/10
CATALOG NO.
ITEM CODE
GFB10A
18506
Boston Gear 800-825-6544
31
Change Gears
8 Diametral Pitch (Steel & Cast Iron)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
A
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
No.
of
Teeth
8
DIAMETRAL PITCH
20
21
22
23
24
3 3
(2) 8 × 16 KEYWAYS
180° APART
1.250 FACE
PITCH
DIA. HUB
DIA.
1.375 BORE
REFERENCE PAGES
8 D.P.
Alterations — 314
Horsepower Ratings — 55
Lubrication — 314
Materials — 315
Selection Procedure — 49
Compound
Steel Bushings
These steel bushings have 2 keys, 180°
apart and fit bores of GH series change
gears with a slip fit. They are used to
mount two gears on one shaft (or stud)
and drive one from the other.
1.1245
1.1255
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
STEEL
2.500
–
GH20
2.625
–
GH21
2.750
–
GH22
2.875
–
GH23
3.000
–
GH24
CAST IRON
3.125
GH25B
3.250
GH26B
3.375
GH27B
3.500
GH28B
3.625
GH29B
3.750 2.06 GH30B
3.875
GH31B
4.000
GH32B
4.125
GH33B
4.250
GH34B
4.375
GH35B
4.500
GH36B
4.625
GH37B
4.750
GH38B
4.875
GH39B
5.000
GH40B
5.125 2.69 GH41A
5.250
GH42A
5.375
GH43A
5.500
GH44A
5.625
GH45A
5.750
GH46A
5.875
GH47A
6.000
GH48A
6.125
GH49A
6.250
GH50A
6.375
GH51A
6.500 3.12 GH52A
6.625
GH53A
6.750
GH54A
6.875
GH55A
7.000
GH56A
7.125
GH57A
7.250
GH58A
7.375 3.25 GH59A
7.500
GH60A
Pitch
Dia.
Hub Catalog
Dia. Number
Item
Code
Outside Dia. = Pitch Dia. +.250"
10198
10200
10202
10204
10206
11426
11428
11430
11432
11434
11436
11438
11440
11442
11444
11446
11448
11450
11452
11454
11456
11458
11460
11462
11464
11466
11468
11470
11472
11474
11476
11478
11480
11482
11484
11486
11488
11490
11492
11494
11496
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
CAST IRON
7.625
GH61A
7.750
GH62A
7.875
GH63A
8.000
GH64A
8.125
GH65A
8.250
GH66A
8.375
GH67A
8.500
GH68A
8.625
GH69A
8.750 3.25 GH70A
8.875
GH71A
9.000
GH72A
9.125
GH73A
9.250
GH74A
9.375
GH75A
9.500
GH76A
9.625
GH77A
9.750
GH78A
9.875
GH79A
10.000
GH80A
10.125
GH81A
10.250
GH82A
10.375
GH83A
10.500
GH84A
10.625
GH85A
10.750
GH86A
10.875
GH87A
11.000
GH88A
11.125 3.75 GH89A
11.250
GH90A
11.375
GH91A
11.500
GH92A
11.625
GH93A
11.750
GH94A
11.875
GH95A
12.000
GH96A
12.125
GH97A
12.250
GH98A
12.375
GH99A
12.500
GH100A
Style
See
Page
315
11498
11500
11502
11504
11506
11508
11510
11512
11514
11516
11518
11520
11522
11524
11526
11528
11530
11532
11534
11536
11538
11540
11542
11544
11546
11548
11550
11552
11554
11556
11558
11560
11562
11564
11566
11568
11570
11572
11574
11576
20 – 49 Teeth – A
50 – 57 Teeth – B
58 – 68 Teeth – C
69 – 100 Teeth – D
.375
1.698
1.694
1.375
2.50
ORDER BY CATALOG NUMBER
OR ITEM CODE
32
CATALOG NO.
ITEM CODE
GHB8A
18508
Boston Gear 800-825-6544
P-1930-BG
04/10
Stem Pinions
20 through 6 Diametral Pitch (Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
Boston Gear Stem Pinions feature small numbers of teeth cut integral on a steel
shaft. Undercutting of the teeth is minimized by the use of special enlarged
Pitch Diameters. When run with standard stock spur gears, they provide high
ratios not normally found in spur gear drives. They are not intended to be operated with each other, with internal gears or with 11 tooth pinions, but will run
satisfactorily with all other standard 141⁄2° Pressure Angle spur gears.
A
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.*
Stem
Dia.
Stem
Length
Overall
Length
Catalog
Number
.375
.375
.500
.625
2.875
2.875
3.375
3.375
4.500
4.500
5.000
5.000
NAR5
NAR6
NAR8
NAR10
20
DIAMETRAL PITCH
5
6
8
10
.287
.335
.430
.525
FACE = 1.125"
16
DIAMETRAL PITCH
5
6
8
10
.359
.419
.537
.656
.4375
.500
.625
.750
3.125
3.125
3.375
3.375
5.000
5.000
5.250
5.250
.479
.558
.637
.716
.875
.625
.625
.750
.875
1.000
4.375
4.375
4.375
4.375
4.375
7.250
7.250
7.250
7.250
7.250
.750
.750
.875
1.000
1.125
4.375
4.375
4.375
4.375
4.375
7.500
7.500
7.500
7.500
7.500
.875
1.000
1.125
1.125
1.500
4.375
4.375
4.375
4.375
4.375
7.750
7.750
7.750
7.750
7.750
DIAMETRAL PITCH
.575
.670
.765
.860
1.050
OVERALL LENGTH
FACE
STEM LENGTH
STEM
DIA
09696
09698
09700
09702
DIAMETRAL PITCH
.718
.837
.956
1.075
1.312
09734
09736
09738
09740
09742
TOLERANCE
+.0000 – .0015
NFR5
NFR6
NFR7
NFR8
NFR10
09768
09770
09772
09774
09776
FACE = 2.500"
6
DIAMETRAL PITCH
.958
1.116
1.433
1.750
NDR5
NDR6
NDR7
NDR8
NDR10
DIMENSION
STEM DIA.
All
FACE = 2.250"
8
5
6
8
10
NBR5
NBR6
NBR8
NBR10
FACE = 2.000"
10
5
6
7
8
10
PITCH
DIA
(SPL)
STANDARD TOLERANCES
DIAMETRAL PITCH
5
6
7
8
10
09654
09656
09658
09660
FACE = 1.375"
12
5
6
7
8
10
Item
Code
NHR5
NHR6
NHR7
NHR8
NHR10
09796
09798
09800
09802
09804
FACE = 3.000"
1.250
1.375
1.625
2.000
4.375
4.375
5.000
5.375
8.500
8.500
9.000
9.500
NJR5
NJR6
NJR8
NJR10
09822
09824
09826
09828
*Used for calculating Center Distance, not ratio.
P-1930-BG
04/10
Boston Gear 800-825-6544
33
Drawn Pinion Wire
48, 32 and 24 Diametral Pitch (Brass & Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ORDER BY CATALOG NUMBER
OR ITEM CODE
No. of
Teeth
A
Pitch
Dia.
Catalog
Number
Item
Code
48
DIAMETRAL PITCH
Drawn Pinion Wire, teeth not generated.
All Pinion Wire is stocked in 4 foot
pieces. Other lengths can be furnished
on special order. Price on application.
6
8
9
10
12
14
15
16
18
.125
.167
.188
.208
.250
.292
.312
.333
.375
6
8
9
10
12
14
15
16
18
.125
.167
.188
.208
.250
.292
.312
.333
.375
BRASS
G24
G25
G26
G27
G29
G30
G31
G32
G33
STEEL
GS24
GS25
GS26
GS27
GS29
GS30
GS31
GS32
GS33
36900
36902
36904
36906
36908
36910
36912
36914
36916
36954
36956
36958
36960
36962
36964
36966
36968
36970
32
DIAMETRAL PITCH
6
8
9
10
11
12
14
15
16
.188
.250
.281
.312
.344
.375
.438
.469
.500
6
8
9
10
11
12
14
15
16
.188
.250
.281
.312
.344
.375
.438
.469
.500
BRASS
G39
G40
G41
G42
G43
G44
G45
G46
G47
STEEL
GS39
GS40
GS41
GS42
GS43
GS44
GS45
GS46
GS47
36918
36920
36922
36924
36926
36928
36930
36932
36934
36972
36974
36976
36978
36980
36982
36984
36986
36988
24
DIAMETRAL PITCH
34
Boston Gear 800-825-6544
6
9
10
12
14
15
16
.250
.375
.417
.500
.583
.625
.667
6
8
9
10
11
12
14
15
16
.250
.333
.375
.417
.458
.500
.583
.625
.667
BRASS
G54
G56
G57
G59
G60
G61
G62
STEEL
GS54
GS55
GS56
GS57
GS58
GS59
GS60
GS61
GS62
36936
36940
36942
36946
36948
36950
36952
36990
36992
36994
36996
36998
37000
37002
37004
37006
P-1930-BG
04/10
Rack
48 through 3 Diametral Pitch (Nylon & Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Pitch Nom- Mating
Nylon
Steel
Overall Line
inal
Spur
Thick- to Back Length Gear Catalog Item Catalog Item
ness
(B)
(Feet) Page # Number Code Number Code
48 DIAMETRAL PITCH
FACE WIDTH = .125"
1
18
2
32 DIAMETRAL PITCH
.125
.104
A
GP586-1 53899
–
–
–
–
L501-2 12726
FACE WIDTH = .188"
1
GP583-1 53900
–
–
2
18, 19
–
–
L503-2 12728
4
–
–
L503-4 12730
24 DIAMETRAL PITCH
FACE WIDTH = .250"
.188
.156
1
GP579-1 53901
–
–
2
19, 20
–
–
L505-2 12732
4
–
–
L505-4 12734
20 DIAMETRAL PITCH
FACE WIDTH = .375"
.250
.208
2
.375
.325
4
20, 21
6
16 DIAMETRAL PITCH
–
–
–
–
L509-2 12736
–
L509-4 12738
–
L509-6 12740
*FACE WIDTH = .313"
2
4
21, 22
4
.500
.438
6
12 DIAMETRAL PITCH
–
–
–
–
–
L510-2 12742
–
L510-4 12744
–
L512-4 12746
–
L512-6 12748
FACE WIDTH = .750"
4
6
22, 23
.750
.667
4
6
10 DIAMETRAL PITCH
–
–
–
–
–
L514-4 12750
–
L514-6 12752
–
L515-4 12754
–
L515-6 12756
FACE WIDTH = 1.000"
4
6
23, 24
4
1.000
.900
6
8 DIAMETRAL PITCH
–
–
–
–
–
L516-4 37324
–
L516-6 37326
–
L517-4 37328
–
L517-6 37330
FACE WIDTH = 1.250"
4
6
24, 25
4
1.250 1.125
6
6 DIAMETRAL PITCH
–
–
–
–
–
L518-4 37332
–
L518-6 37334
–
L519-4 37336
–
L519-6 37338
FACE WIDTH = 1.500"
4
6
25, 26
4
1.500 1.333
6
5 DIAMETRAL PITCH
–
–
–
–
–
L520-4 37340
–
L520-6 37342
–
L521-4 37344
–
L521-6 37346
FACE WIDTH = 1.750"
4
1.250 1.050
26
6
4 DIAMETRAL PITCH
–
–
–
L522-4 37348
–
L522-6 37350
FACE WIDTH = 2.000"
4
27
6
DIAMETRAL PITCH
–
–
–
L523-4 37352
–
L523-6 37354
FACE WIDTH = 3.000"
–
–
–
–
.312
.500
.625
.750
1.000
1.500
3
1.500
.250
.417
.525
.625
.833
1.250
1.167
4
6
27
*Face Width of L512-4 and L512-6 = 1/2".
P-1930-BG
04/10
L524-4
L524-6
37356
37358
PITCH LINE
TO BACK
(B)
WIDTH
OVERALL
THICKNESS
LENGTH
STANDARD TOLERANCES ‡
DIMENSION
LENGTH†
All
1/8 – 3/4
FACE
1 – 1-1/2
WIDTH
1-3/4 – 2
3
TOLERANCE
+ 1.00 – .000
+ .000 – .002
+ .000 – .003
+ .000 – .004
+ .000 – .006
†Ends not machined. Tolerance allows for cutting and
matching. Nylon Rack is molded in proper lengths to
permit end to end butting without interruption of tooth
spacing.
‡Steel only.
PITCH DIA
OF GEAR
(D)
GEAR
CENTER LINE
TO BACK OF RA
B+D
2
FACE
WIDTH
CK
OVERALL
THICKNESS
LENGTH
PITCH LINE
TO BACK
(B)
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
Boston Gear 800-825-6544
35
Internal Gears
48 through 16 Diametral Pitch (Brass)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ORDER BY CATALOG NUMBER
OR ITEM CODE
No. of
Teeth
A
Pitch
Dia.
O.D.
I.D.
Catalog
Number
1.500
2.000
2.750
3.750
.986
1.486
1.986
2.986
G632
G633
G635
G637
2.000
2.750
3.750
4.750
6.750
1.480
1.980
2.980
3.980
5.980
G664
G666
G668
G669
G670
2.250
2.750
3.750
4.750
6.750
1.474
1.974
2.974
3.974
5.974
G675
G677
G679
G680
G681
2.750
3.750
4.750
6.750
1.962
2.962
3.962
5.962
G689
G691
G692
G693
Item
Code
48
DIAMETRAL PITCH
48
72
96
144
1.000
1.500
2.000
3.000
FACE = .125"
12066
12068
12070
12072
32
DIAMETRAL PITCH
48
64
96
128
192
FACE
1.500
2.000
3.000
4.000
6.000
FACE = .188"
12056
12058
12060
12062
12064
24
DIAMETRAL PITCH
PITCH
DIA.
INSIDE
DIA.
OUTSIDE
DIA.
36
48
72
96
144
1.500
2.000
3.000
4.000
6.000
FACE = .250"
12046
12048
12050
12052
12054
16
DIAMETRAL PITCH
STANDARD TOLERANCES
DIMENSION
48 Pitch
I.D. 32 Pitch
24 Pitch
16 Pitch
O.D.
All
All
All
All
All
TOLERANCE
+.004 – .000
+.005 – .000
+.006 – .000
+.008 – .000
+.001 + .003
32
48
64
96
2.000
3.000
4.000
6.000
FACE = .313"
12038
12040
12042
12044
PINION
PITCH DIA.
(d)
CENTER DISTANCE
GEAR
PITCH DIA.
(D)
CENTER = D – d
DISTANCE
2
NOTE: The difference in tooth numbers between Gear and Pinion
should not be less than 15.
36
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
64 and 48 Diametral Pitch (Delrin & Brass)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Style
See
Page
315
Hub
Pitch
Dia.
Bore
Dia.
Proj.
Without Keyway
or Setscrew
Catalog
Item
Number
Code
A
Face = .125"
Outside Dia. = Pitch Dia. + .033"
Overall Length = .125" + Hub Proj.
64
DIAMETRAL PITCH
BRASS
16
18
20
24
28
32
36
40
44
48
52
56
60
64
72
80
88
96
112
128
144
160
192
.250
.281
.312
.375
.438
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.125
1.250
1.375
1.500
1.750
2.000
2.250
2.500
3.000
.125
.1875
.250
.3125
.19
.22
.25
.28
.34
.38
.44
.44
.50
.50
.56
.56
.62
.62
.69
.69
.75
.75
.81
.88
.75
.75
.88
.19
.25
A
.25
.31
C
Y6416
Y6418
Y6420
Y6424
Y6428
Y6432
Y6436
Y6440
Y6444
Y6448
Y6452
Y6456
Y6460
Y6464
Y6472
Y6480
Y6488
Y6496
Y64112
Y64128
Y64144
Y64160
Y64192
09482
09484
09486
09488
09490
09492
09494
09496
09498
09500
09502
09504
09506
09508
09510
09512
09514
09516
09518
09520
09522
09524
09526
Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.
48
DIAMETRAL PITCH
MOLDED DELRIN
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
42
P-1930-BG
.375
.396
.417
.438
.458
.479
.500
.521
.542
.562
.583
.604
.625
.646
.667
.688
.708
.729
.750
.771
.792
.813
.833
.875
04/10
.31
.34
.38
.1562
.41
.25
.45
.48
.50
.1875
.55
A
.25
YP4818
YP4819
YP4820
YP4821
YP4822
YP4823
YP4824
YP4825
YP4826
YP4827
YP4828
YP4829
YP4830
YP4831
YP4832
YP4833
YP4834
YP4835
YP4836
YP4837
YP4838
YP4839
YP4840
YP4842
53902
53903
53904
53905
53906
53907
53908
53909
53910
53911
53912
53913
53914
53915
53916
53917
53918
53919
53920
53921
53922
53923
53924
53925
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
48 D.P.
TOLERANCE
±.0005
64 D.P.
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
Boston Gear 800-825-6544
37
Spur Gears
48 Diametral Pitch (Delrin)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Style
See
Page
315
Hub
Pitch
Dia.
Bore
Dia.
Proj.
Without Keyway
or Setscrew †
Catalog
Item
Number
Code
Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.
48
DIAMETRAL PITCH
MOLDED DELRIN
HUB
PROJ.
FACE
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD
TOLERANCES*
DIMENSION
BORE
All
TOLERANCE
+.001 – .000
*Gears with Brass Inserts only.
48 D.P.
REFERENCE PAGES
Alterations — 314
Materials — 315
†All YPB gears have setscrews.
38
BORE
SETSCREW
1/8
#2-56
3/16
#4-40
1/4
#6-32
Boston Gear 800-825-6544
44
45
48
52
54
56
60
64
66
72
80
84
96
100
108
120
.917
.938
1.000
1.083
1.125
1.168
1.250
1.333
1.375
1.500
1.667
1.750
2.000
2.083
2.250
2.500
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
42
44
45
48
52
54
56
60
64
66
72
80
84
96
100
108
120
.375
.396
.417
.438
.458
.479
.500
.521
.542
.562
.583
.604
.625
.646
.667
.688
.708
.729
.750
.771
.792
.813
.833
.875
.917
.938
1.000
1.083
1.125
1.168
1.250
1.333
1.375
1.500
1.667
1.750
2.000
2.083
2.250
2.500
YP4844
YP4845
YP4848
YP4852
YP4854
YP4856
YP4860
YP4864
.250
.61
.25
B
YP4866
YP4872
YP4880
YP4884
YP4896
YP48100
YP48108
YP48120
MOLDED DELRIN WITH BRASS INSERTS
.188
.55
.31
.34
.125
.38
.40
.45
.48
.50
A
.188
.55
.250
.61
.25
B
YPB4818
YPB4819
YPB4820
YPB4821
YPB4822
YPB4823
YPB4824
YPB4825
YPB4826
YPB4827
YPB4828
YPB4829
YPB4830
YPB4831
YPB4832
YPB4833
YPB4834
YPB4835
YPB4836
YPB4837
YPB4838
YPB4839
YPB4840
YPB4842
YPB4844
YPB4845
YPB4848
YPB4852
YPB4854
YPB4856
YPB4860
YPB4864
YPB4866
YPB4872
YPB4880
YPB4884
YPB4896
YPB48100
YPB48108
YPB48120
53926
53927
53928
53929
53930
53931
53932
53933
53934
53935
53936
53937
53938
53939
53940
53941
53942
53943
53944
53945
53946
53947
53948
53949
53950
53951
53952
53953
53954
53955
53956
53957
53958
53959
53960
53961
53962
53963
53964
53965
53966
53967
53968
53969
53970
53971
53972
53973
53974
53975
53976
53977
53978
53979
53980
53981
P-1930-BG
04/10
Spur Gears
48 and 32 Diametral Pitch (Delrin & Brass)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Style
See
Page
315
Hub
Pitch
Dia.
Bore
Dia.
Proj.
Without Keyway
or Setscrew
Catalog
Item
Number
Code
A
Face = .125"
Outside Dia. = Pitch Dia. + .042"
Overall Length = .125" + Hub Proj.
48
DIAMETRAL PITCH
BRASS
12
15
18
21
24
27
30
36
42
48
54
60
66
72
84
96
120
144
192
.250
.312
.375
.438
.500
.562
.625
.750
.875
1.000
1.125
1.250
1.375
1.500
1.750
2.000
2.500
3.000
4.000
.125
.1875
.250
.3125
.18
.22
.28
.35
.38
.44
.44
.50
.57
.63
.69
.69
.75
.75
.82
.88
.75
.88
1.00
.19
.25
A
.25
.31
C
Y4812
Y4815
Y4818
Y4821
Y4824
Y4827
Y4830
Y4836
Y4842
Y4848
Y4854
Y4860
Y4866
Y4872
Y4884
Y4896
Y48120
Y48144
Y48192
09444
09446
09448
09450
09452
09454
09456
09458
09460
09462
09464
09466
09468
09470
09472
09474
09476
09478
09480
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
Face = .188"
Outside Dia. = Pitch Dia. + .062"
Overall Length = .188" + Hub Proj.
32
DIAMETRAL PITCH
MOLDED DELRIN
12
14
15
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
48
52
56
64
72
80
96
P-1930-BG
.375
.438
.469
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.062
1.125
1.187
1.250
1.312
1.375
1.500
1.625
1.750
2.000
2.250
2.500
3.000
04/10
.1562
.28
.31
.31
.31
.34
.47
A
.50
.1875
.250
.56
.50
.56
.63
.61
.31
.31
.63
B
.67
.3125
.31
.81
YP3212
YP3214
YP3215
YP3216
YP3218
YP3220
YP3222
YP3224
YP3226
YP3228
YP3230
YP3232
YP3234
YP3236
YP3238
YP3240
YP3242
YP3244
YP3248
YP3252
YP3256
YP3264
YP3272
YP3280
YP3296
53982
53983
53984
53985
53986
53987
53988
53989
53990
53991
53992
53993
53994
53995
53996
53997
53998
53999
54000
54001
54002
54003
54004
54005
54006
STANDARD TOLERANCES*
DIMENSION
BORE
All
TOLERANCE
±.0005˜
*Brass only.
48 D.P.
32 D.P.
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
Boston Gear 800-825-6544
39
Spur Gears
32 Diametral Pitch (Delrin & Brass)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Hub
Pitch
Dia.
Bore
Dia.
Proj.
Without Keyway
or Setscrew †
Catalog
Item
Number
Code
Style
See
Page
315
Face = .188"
Outside Dia. = Pitch Dia. + .062"
Overall Length = .188" + Hub Proj.
32
DIAMETRAL PITCH
MOLDED DELRIN with BRASS INSERTS
HUB
PROJ.
FACE
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
TOLERANCE
Brass
BORE
All
± .0005
Delrin with Brass Inserts
BORE
All
+ .001 – .000
32 D.P.
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
†All YPB gears have setscrew and spot drill.
40
BORE
SETSCREW
1/8
#2-56
3/16
#4-40
1/4
#6-32
5/16
#8-32
Boston Gear 800-825-6544
12
14
15
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
48
52
56
64
72
80
96
.375
.438
.469
.500
.562
.625
.688
.750
.812
.875
.938
1.000
1.062
1.125
1.187
1.250
1.312
1.375
1.500
1.625
1.750
2.000
2.250
2.500
3.000
12
14
16
18
20
24
28
32
36
40
48
56
64
72
80
96
112
128
160
.375
.438
.500
.562
.625
.750
.875
1.000
1.125
1.250
1.500
1.750
2.000
2.250
2.500
3.000
3.500
4.000
5.000
.125
.1875
.250
.3125
.125
.1875
.250
.3125
.28
.31
.31
.34
.34
.47
.50
.50
.56
.50
.56
.63
.31
.61
.61
.61
.61
.61
.61
.63
.67
.67
.67
.81
.81
.81
BRASS
.28
.34
.40
.43
.47
.53
.59
.66
.72
.72
.78
.84
.90
.88
.88
1.00
1.00
1.00
1.00
A
B
.25
.25
A
.25
.25
.31
C
YPB3212
YPB3214
YPB3215
YPB3216
YPB3218
YPB3220
YPB3222
YPB3224
YPB3226
YPB3228
YPB3230
YPB3232
YPB3234
YPB3236
YPB3238
YPB3240
YPB3242
YPB3244
YPB3248
YPB3252
YPB3256
YPB3264
YPB3272
YPB3280
YPB3296
54007
54008
54009
54010
54011
54012
54013
54014
54015
54016
54017
54018
54019
54020
54021
54022
54023
54024
54025
54026
54027
54028
54029
54030
54031
Y3212
Y3214
Y3216
Y3218
Y3220
Y3224
Y3228
Y3232
Y3236
Y3240
Y3248
Y3256
Y3264
Y3272
Y3280
Y3296
Y32112
Y32128
Y32160
09406
09408
09410
09412
09414
09416
09418
09420
09422
09424
09426
09428
09430
09432
09434
09436
09438
09440
09442
P-1930-BG
04/10
Spur Gears
24 Diametral Pitch (Delrin)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Style
See
Page
315
Hub
Pitch
Dia.
Bore
Dia.
Proj.
Without Keyway
or Setscrew†
Catalog
Item
Number
Code
A
Face = .250"
Outside Dia. = Pitch Dia. + .083"
Overall Length = .250" + Hub Proj.
24
DIAMETRAL PITCH
MOLDED DELRIN
12
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
30
32
33
34
36
39
40
42
44
45
48
50
52
54
56
60
.500
.583
.625
.667
.709
.750
.791
.833
.875
.917
.959
1.000
1.041
1.083
1.125
1.167
1.250
1.333
1.375
1.416
1.500
1.625
1.666
1.750
1.833
1.875
2.000
2.083
2.166
2.250
2.333
2.500
12
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
30
32
33
34
36
39
40
42
.500
.583
.625
.667
.709
.750
.791
.833
.875
.917
.959
1.000
1.041
1.083
1.125
1.167
1.250
1.333
1.375
1.416
1.500
1.625
1.666
1.750
P-1930-BG
04/10
.38
.44
YP2412
YP2414
YP2415
.48
YP2416
YP2417
.188
A
YP2418
YP2419
.55
YP2420
YP2421
YP2422
YP2423
.63
YP2424
.61
YP2425
YP2426
YP2427
.63
.250
YP2428
.31
YP2430
YP2432
.61
YP2433
YP2434
.63
YP2436
B
YP2439
YP2440
YP2442
YP2444
YP2445
.313
.67
YP2448
YP2450
YP2452
YP2454
YP2456
YP2460
MOLDED DELRIN WITH BRASS INSERTS
.38
.44
.48
.188
A
.55
.31
.63
.61
.250
.63
B
.61
.63
.313
.67
YPB2412
YPB2414
YPB2415
YPB2416
YPB2417
YPB2418
YPB2419
YPB2420
YPB2421
YPB2422
YPB2423
YPB2424
YPB2425
YPB2426
YPB2427
YPB2428
YPB2430
YPB2432
YPB2433
YPB2434
YPB2436
YPB2439
YPB2440
YPB2442
54032
54033
54034
54035
54036
54037
54038
54039
54040
54041
54042
54043
54044
54045
54046
54047
54048
54049
54050
54051
54052
54053
54054
54055
54056
54057
54058
54059
54060
54061
54062
54063
54064
54065
54066
54067
54068
54069
54070
54071
54072
54073
54074
54075
54076
54077
54078
54079
54080
54081
54082
54083
54084
54085
54086
54087
HUB
PROJ.
FACE
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES*
DIMENSION
BORE
All
TOLERANCE
+.001 – .000
*Gears with Brass Inserts only.
24 D.P.
REFERENCE PAGES
Alterations — 314
Materials — 315
†All YPB gears have setscrew and spot drill.
BORE
SETSCREW
3/16
#4-40
1/4
#6-32
5/16
#8-32
Boston Gear 800-825-6544
41
Spur Gears
24 and 20 Diametral Pitch (Delrin, Brass, Steel & Cast Iron)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
Pitch
Dia.
Bore
Dia.
With Keyway
and Setscrew†
Catalog
Item
Number
Code
Face = .250"
Outside Dia. = Pitch Dia. + .083"
DIAMETRAL PITCH
Overall Length = .250" + Hub Proj.
MOLDED DELRIN WITH BRASS INSERTS
44
1.833
YPB2444 54088
–
–
45
1.875
YPB2445 54089
–
–
48
2.000
YPB2448 54090
–
–
50
2.083
YPB2450 54091
–
–
.3125
.67
.31
B
52
2.166
YPB2452 54092
–
–
54
2.250
YPB2454 54093
–
–
56
2.333
YPB2456 54094
–
–
60
2.500
YPB2460 54095
–
–
BRASS
12
.500
.38
Y2412
09372
–
–
15
.625
.50
Y2415
09374
–
–
.1875
.25
18
.750
.54
Y2418
09376
–
–
21
.875
.60
Y2421
09378
–
–
A
24
1.000
.66
Y2424
09380
–
–
27
1.125
.73
Y2427
09382
–
–
.250
.25
30
1.250
.73
Y2430
09384
–
–
36
1.500
.79
Y2436
09386
–
–
42
1.750
.86
.25
Y2442
09388
–
–
48
2.000
.92
Y2448
09390
–
–
.3125
54
2.250
.88
.31
Y2454
09392
–
–
60
2.500
.88
Y2460
09394
–
–
72
3.000
Y2472
09396
–
–
84
3.500
.31
C Y2484
09398
–
–
96
4.000
.375
1.00
Y2496
09400
–
–
120
5.000
Y24120 09402
–
–
.38
144
6.000
Y24144 09404
–
–
24
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
TOLERANCE
Brass, Steel and Cast Iron
BORE
All
± .0005
Delrin with Brass Inserts
BORE
All
+ .001 – .000
24 D.P.
20 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 58
Lubrication — 314
Materials — 315
Selection Procedure — 49
†YPB gears have one setscrew (#8-32), no keyway.
*5/16" bore have #35 (.110) drilled hole
through one wall, no keyway.
‡3/8" bore have one setscrew.
No keyway.
1/2" bore and larger have standard
keyway at 90° to setscrew.
See Page 315.
42
Boston Gear 800-825-6544
Face = .500"
Outside Dia. = Pitch Dia. + .100"
Overall Length = .500" + Hub Proj.
20
DIAMETRAL PITCH
STEEL
12
14
15
16
18
20
24
25
30
35
.600
.700
.750
.800
.900
1.000
1.200
1.250
1.500
1.750
40
2.000
.500
.625
.750
1.72
45
50
60
70
2.250
2.500
3.000
3.500
.500
1.97
1.62
2.12
2.38
80
84
90
100
120
140
160
180
200
4.000
4.200
4.500
5.000
6.000
7.000
8.000
9.000
10.000
.625
1.38
.625
1.50
.625
1.75
.3125
.375
.500
.46
.56
.60
.66
.74
.84
.92
.97
1.22
1.47
YA12
YA14
YA15
.44
YA16
YA18
YA20
YA24
.44
A YA25
YA30
.50
YA35
YA40
.50
–
–
YA45
YA50A
.50
YA60A
YA70A
CAST IRON
C YA80
.62
B YA84
YA90
C YA100
YA120
.62
YA140
D YA160
YA180
.75
YA200
.44
09892
09894
09896
09898
09900
09902
09914
09904
09906
09908
09910
–
–
09912
10548
10550
10552
YA12-5/16*
YA14-5/16*
YA15-3/8‡
YA16-3/8‡
YA18-3/8‡
YA20-1/2
YA24-1/2
YA25-1/2
YA30-1/2
YA35-1/2
YA40-1/2
YA40-5/8
YA40-3/4
–
–
–
–
46128
46129
46130
46131
46132
46133
46134
46135
46136
46137
46138
46139
46140
–
–
–
–
10554
10556
10558
10560
10562
10564
10566
10568
10570
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
P-1930-BG
04/10
Spur Gears
16 and 12 Diametral Pitch (Steel & Cast Iron)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
No.
of
Teeth
Pitch
Dia.
Bore
Dia.
With Keyway
and Setscrew†
Catalog
Item
Number
Code
A
Face = .750"
Outside Dia. = Pitch Dia. + .125"
Overall Length = .750" + Hub Proj.
16
DIAMETRAL PITCH
STEEL
12
14
.750
.875
.375
.56
.69
.50
15
.938
.375
.500
.75
.50
16
18
20
1.000
1.125
1.250
.500
.81
.94
1.05
.50
24
1.500
1.20
.50
28
1.750
1.45
.50
30
1.875
1.58
.50
32
2.000
36
40
48
56
60
64
72
80
2.250
2.500
3.000
3.500
3.750
4.000
4.500
5.000
.625
.625
.750
.625
.750
.625
.750
.875
.625
.750
.875
1.000
.625
.750
.50
A
1.70
.50
1.95
2.20
2.00
2.50
2.75
2.88
3.38
3.88
.50
.62
.75
YB12
YB14
YB15
–
YB16
YB18
YB20
YB24
–
YB28
–
YB30
–
–
YB32
–
–
–
YB36
YB40
YB48A
YB56A
YB60A
YB64A
YB72A
YB80A
09916
09918
09920
–
09922
09924
09926
09928
–
09930
–
09932
–
–
09934
–
–
–
09936
09938
10572
10574
10576
10578
10580
10582
YB12-3/8†
YB14-3/8†
YB15-3/8†
YB15-1/2
YB16-1/2
YB18-1/2
YB20-5/8
YB24-5/8
YB24-3/4
YB28-5/8
YB28-3/4
YB30-5/8
YB30-3/4
YB30-7/8
YB32-5/8
YB32-3/4
YB32-7/8
YB32-1
–
–
–
–
–
–
–
–
46141
46142
45991
46143
46144
46145
46146
46147
46148
46149
46150
46151
46152
46153
46154
46155
46156
46157
–
–
–
–
–
–
–
–
CAST IRON
96
128
144
160
192
6.000
8.000
9.000
10.000
12.000
.750
1.75
2.00
2.00
.75
.875
2.00
.75
1.00
D
12
DIAMETRAL PITCH
YB96
10584
–
–
YB128 10588
–
–
YB144 10590
–
–
YB160 10592
–
–
YB192 10594
–
–
Face = 1.000"
Outside Dia. = Pitch Dia. + .167"
Overall Length = 1.000" + Hub Proj.
STEEL
12
13
14
15
16
18
20
1.000
1.083
1.167
1.250
1.333
1.500
1.667
.500
21
1.750
24
2.000
28
2.333
.750
.875
.750
.875
1.000
.750
.875
1.000
30
36
42
48
54
2.500
3.000
3.500
4.000
4.500
P-1930-BG
04/10
.625
.750
.750
.875
.75
.83
.92
.99
1.07
1.24
1.32
.62
.62
1.40
.62
1.65
.62
1.99
.62
2.15
1.94
2.44
2.88
3.38
.62
.88
.62
.88
A
YD12
YD13
YD14
YD15
YD16
YD18
YD20
YD21
–
YD24
–
–
YD28
–
–
YD30
YD36A
YD42A
YD48A
YD54A
09940
09942
09944
09946
09948
09950
09952
09954
–
09956
–
–
09958
–
–
09960
10596
10598
10600
10602
YD12-1/2*
YD13-5/8‡
YD14-5/8
YD15-5/8
YD16-5/8
YD18-3/4
YD20-3/4
YD21-3/4
YD21-7/8
YD24-3/4
YD24-7/8
YD24-1
YD28-3/4
YD28-7/8
YD28-1
–
–
–
–
–
46158
46159
46160
46161
46162
46163
46164
46165
46166
46167
46168
46169
46170
46171
46172
–
–
–
–
–
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
16 D.P.
TOLERANCE
±.0005
12 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 58, 59
Lubrication — 314
Materials — 315
Selection Procedure — 49
†3/8" bore have one setscrew.
No keyway.
YB15-1/2 and larger have standard
keyway at 90° to setscrew.
See page 315.
*YD12-1/2 has one setscrew.
No keyway.
‡YD13-5/8 has one setscrew.
No keyway.
YD14-5/8 bore and larger have standard
keyway at 90° to setscrew.
Boston Gear 800-825-6544
43
Spur Gears
12 and 10 Diametral Pitch (Cast Iron & Steel)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Pitch
Dia.
Bore
Dia.
DIAMETRAL PITCH
FACE
HUB
PROJ.
5.000
5.500
6.000
7.000
8.000
9.000
10.000
11.000
12.000
14.000
16.000
18.000
.875
2.12
2.25
2.25
1.000
2.50
2.75
10
PITCH
DIA.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
12 D.P.
TOLERANCE
±.0005
10 D.P.
DIAMETRAL PITCH
12
14
15
16
1.200
1.400
1.500
1.600
.625
18
1.800
1.42
20
2.000
24
2.400
25
2.500
28
2.800
.750
.875
.875
1.000
.875
1.000
.875
1.000
.875
1.000
30
35
40
45
48
50
3.000
3.500
4.000
4.500
4.800
5.000
.875
2.00
2.50
2.95
3.45
3.75
3.95
55
60
70
80
90
100
120
140
160
200
5.500
6.000
7.000
8.000
9.000
10.000
12.000
14.000
16.000
20.000
.750
1.000
1.000
1.125
With Keyway
and Setscrew†
Catalog
Item
Number
Code
Face = 1.000"
Outside Dia. = Pitch Dia. + .166"
Overall Length = 1.000" + Hub Proj.
12
60
66
72
84
96
108
120
132
144
168
192
216
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
.92
1.12
1.22
1.32
1.62
2.02
2.12
2.42
2.50
3.00
3.25
CAST IRON
B
YD60
10604
–
–
YD66
10606
–
–
.88
YD72
10608
–
–
YD84
10610
–
–
YD96
10612
–
–
YD108 10614
–
–
.88
D
YD120 10616
–
–
YD132 10618
–
–
YD144 10620
–
–
1.00
YD168 10622
–
–
YD192 10624
–
–
YD216 10626
–
–
Face = 1.250"
Outside Dia. = Pitch Dia. + .200"
Overall Length = 1.250" + Hub Proj.
STEEL
YF12
09962 YF12-5/8
46173
.62
YF14
09964 YF14-5/8
46174
YF15
09966 YF15-3/4
46175
.62
YF16
09968 YF16-3/4
46176
YF18
09970
YF18-3/4
46177
.62
–
–
YF18-7/8
46178
YF20
09972 YF20-7/8
46179
.62
–
–
YF20-1
46180
A
YF24
09974 YF24-7/8
46181
.62
–
–
YF24-1
46182
YF25
09976 YF25-7/8
46183
.62
–
–
YF25-1
46184
YF28
09978
YF28-7/8
46185
.62
–
–
YF28-1
46186
YF30A 10630
–
–
.88
YF35A 10632
–
–
YF40A 10634
–
–
YF45A 10636
–
–
.88
YF48A 10638
–
–
YF50A 10640
–
–
CAST IRON
YF55
10642
–
–
B
YF60
10644
–
–
1.00
YF70
10646
–
–
YF80
10648
–
–
YF90
10650
–
–
D
YF100 10652
–
–
YF120 10656
–
–
1.12
YF140 10658
–
–
YF160 10660
–
–
1.25
YF200B 10664
–
–
†All gears have standard keyway at 90° to setscrew. See Page 315.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 59, 60
Lubrication — 314
Materials — 315
Selection Procedure — 49
44
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
8 and 6 Diametral Pitch (Steel & Cast Iron)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
No.
of
Teeth
Pitch
Dia.
Bore
Dia.
With Keyway
and Setscrew†
Catalog
Item
Number
Code
A
Face = 1.500"
Outside Dia. = Pitch Dia. + .250"
Overall Length = 1.500" + Hub Proj.
8
DIAMETRAL PITCH
STEEL
12
14
1.500
1.750
.750
1.12
1.31
15
1.875
1.43
16
2.000
18
2.250
20
2.500
22
2.750
.750
.875
.875
1.000
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
1.125
.875
1.000
1.125
.875
24
3.000
28
32
36
3.500
4.000
4.500
40
44
48
56
60
64
72
80
88
96
112
120
128
5.000
5.500
6.000
7.000
7.500
8.000
9.000
10.000
11.000
12.000
14.000
15.000
16.000
1.56
1.81
2.06
2.31
2.56
1.000
3.06
3.00
3.50
1.000
2.50
3.00
1.125
3.25
6
DIAMETRAL PITCH
YH12
09980 YH12-3/4
46187
YH14
09982 YH14-3/4
46188
YH15
09984
YH15-3/4
46189
.75
–
–
YH15-7/8
46190
YH16
09986 YH16-7/8
46191
.88
–
–
YH16-1
46192
YH18
09988 YH18-7/8
46193
.88
A
–
–
YH18-1
46194
–
–
YH18-1-1/8 46195
YH20
09990 YH20-7/8
46196
.88
–
–
YH20-1
46197
–
–
YH20-1-1/8 46198
YH22
09992 YH22-7/8
46199
.88
–
–
YH22-1
46200
–
–
YH22-1-1/8 46201
YH24
09994 YH24-7/8
46202
.88
–
–
YH24-1
46203
–
–
YH24-1-1/8 46204
.88
YH28
09996
–
–
YH32C 10666
–
–
.88
YH36C 10668
–
–
CAST IRON
YH40B 10670
–
–
B
YH44B 10672
–
–
YH48B 10674
–
–
1.00
YH56B 10676
–
–
C
YH60
10678
–
–
YH64B 10680
–
–
YH72B 10682
–
–
YH80B 10684
–
–
D
YH88B 10686
–
–
YH96B 10688
–
–
1.25
YH112B 10690
–
–
YH120 10692
–
–
YH128B 10694
–
–
Face = 2.000"
Outside Dia. = Pitch Dia. + .333"
Overall Length = 2.000" + Hub Proj.
.75
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
STEEL
12
2.000
14
2.333
15
2.500
1.000
1.000
1.125
1.000
1.125
1.1875
1.250
1.46
.88
1.79
.88
1.96
.88
A
YJ12
YJ14
–
YJ15
–
–
–
09998
10000
–
10002
–
–
–
YJ12-1
YJ14-1
YJ14-1-1/8
YJ15-1
YJ15-1-1/8
YJ15-1-3/16
YJ15-1-1/4
46205
46206
46207
46208
46209
46210
46211
8 D.P.
6 D.P.
†All gears have standard keyway at 90° to setscrew. See Page 315.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 60, 61
Lubrication — 314
Materials — 315
Selection Procedure — 49
P-1930-BG
04/10
Boston Gear 800-825-6544
45
Spur Gears
6 and 5 Diametral Pitch (Steel & Cast Iron)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
No.
of
Teeth
Style Without Keyway
or Setscrew
See
Page Catalog Item
Proj. 315 Number Code
Hub
Pitch
Dia.
Bore
Dia.
With Keyway
and Setscrew†
Catalog
Item
Number
Code
Face = 2.000"
Outside Dia. = Pitch Dia. + .333"
Overall Length = 2.000" + Hub Proj.
6
DIAMETRAL PITCH
STEEL
FACE
PITCH
DIA.
HUB
PROJ.
HUB
DIA.
BORE
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
16
2.667
18
3.000
21
3.500
24
27
30
4.000
4.500
5.000
33
36
42
48
54
60
66
72
84
96
108
120
5.500
6.000
7.000
8.000
9.000
10.000
11.000
12.000
14.000
16.000
18.000
20.000
1.000
1.125
1.1875
1.250
1.000
1.125
1.1875
1.250
1.000
1.125
1.1875
1.250
2.13
2.46
2.96
1.125
3.00
3.50
4.00
1.125
3.00
3.50
1.250
3.50
1.250
4.00
1.375
4.50
5
DIAMETRAL PITCH
YJ16
10004 YJ16-1
46212
–
–
YJ16-1-1/8 46213
–
–
YJ16-1-3/16 46214
–
–
YJ16-1-1/4 46215
YJ18
10006 YJ18-1
46216
–
–
YJ18-1-1/8 46217
.88
–
–
YJ18-1-3/16 46218
–
–
YJ18-1-1/4 46219
A
YJ21
10008 YJ21-1
46220
–
–
YJ21-1-1/8 46221
.88
–
–
YJ21-1-3/16 46222
–
–
YJ21-1-1/4 46223
YJ24A
10704
–
–
.88
YJ27A
10706
–
–
YJ30C
10708
–
–
CAST IRON
B
YJ33B
10710
–
–
1.50
A
YJ36B
10712
–
–
YJ42B
10714
–
–
1.50
B
YJ48B
10716
–
–
YJ54B
10718
–
–
YJ60B
10720
–
–
C
YJ66B
10722
–
–
YJ72B
10724
–
–
1.50
YJ84B
10726
–
–
D
YJ96B
10728
–
–
YJ108B 10730
–
–
1.50
YJ120B 10732
–
–
Face = 2.500"
Outside Dia. = Pitch Dia. + .400"
Overall Length = 2.500" + Hub Proj.
.88
STEEL
6 D.P.
5 D.P.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 61, 62
Lubrication — 314
Materials — 315
Selection Procedure — 49
12
14
15
16
18
20
2.400
2.800
3.000
3.200
3.600
4.000
24
25
28
30
35
40
45
50
60
70
80
100
110
120
140
160
180
4.800
5.000
5.600
6.000
7.000
8.000
9.000
10.000
12.000
14.000
16.000
20.000
22.000
24.000
28.000
32.000
36.000
1.125
1.78
2.18
2.38
2.58
2.98
3.38
1.125
3.75
1.250
3.75
4.00
1.375
4.38
1.500
4.75
5.00
5.00
5.00
5.50
1.625
YK12
YK14
YK15
.88
A
YK16
YK18
YK20
CAST IRON
YK24
YK25B
1.25
A
YK28
YK30B
YK35B
B
YK40B
1.25
YK45B
C
YK50
YK60
1.50
YK70B
YK80B
YK100
1.75
D
YK110
YK120
YK140B
2.00
YK160B
YK180B
10010
10012
10014
10016
10018
10020
–
–
–
–
–
–
–
–
–
–
–
–
10738
10740
10742
10744
10746
10748
10750
10752
10754
10756
10758
10762
10764
10766
10768
10770
10772
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
†All gears have standard keyway at 90° to setscrew. See Page 315.
46
Boston Gear 800-825-6544
P-1930-BG
04/10
Rack
20 through 4 Diametral Pitch (Steel)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Overall
Thickness
Pitch Line Nominal Mating
to Back
Length Spur Gear
(B)
(Feet)
Page No.
Steel
Catalog Item
Number Code
A
20
DIAMETRAL PITCH
.500
.450
FACE WIDTH - .500”
4
6
42
L2020-4 12758
L2020-6 12760
16
DIAMETRAL PITCHFACE WIDTH - .750”
4
.750
.688
43
6
L2016-4 12762
L2016-6 12764
12
DIAMETRAL PITCH
1.000
.917
FACE WIDTH - 1.000”
4
6
43 – 44
L2012-4 37320
L2012-6 37322
10
DIAMETRAL PITCH
1.250
1.150
PITCH LINE
TO BACK
(B)
WIDTH
FACE WIDTH - 1.250”
4
6
44
L2010-4 37316
L2010-6 37318
8
DIAMETRAL PITCH
1.500
1.375
FACE WIDTH - 1.500”
4
6
45
L208-4
L208-6
OVERALL
THICKNESS
LENGTH
37312
37314
6
DIAMETRAL PITCH
1.500
1.333
FACE WIDTH - 2.000”
4
6
45 – 46
L206-4
L206-6
37308
37310
5
DIAMETRAL PITCH
1.500
1.300
FACE WIDTH - 2.500”
4
6
46
L205-4
L205-6
37304
37306
4
DIAMETRAL PITCH
2.000
1.750
FACE WIDTH - 3.500”
4
6
–
L204-4
L204-6
37300
37302
STANDARD TOLERANCES
DIMENSION
LENGTH†
All
1/2 – 3/4
FACE
1 – 1-1/2
WIDTH
2 – 2-1/2
3-1/2
TOLERANCE
+1.000 – .000
+.000 – .002
+.000 – .003
+.000 – .004
+.000 – .006
†Ends not machined. Tolerance allows for cutting and
matching.
PITCH DIA
OF GEAR
(D)
GEAR
CENTER LINE
TO BACK OF RA
B+D
2
FACE
WIDTH
CK
OVERALL
THICKNESS
LENGTH
PITCH LINE
TO BACK
(B)
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
P-1930-BG
04/10
Boston Gear 800-825-6544
47
Internal Gears
64 through 24 Diametral Pitch (Brass)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No. of
Teeth
A
Pitch
Dia.
O.D.
I.D.
DIAMETRAL PITCH
64
1.000
96
1.500
128
2.000
192
3.000
1.500
2.000
2.750
3.750
.980
1.480
1.980
2.980
FACE WIDTH - .125”
YI6464
12030
YI6496
12032
YI64128
12034
YI64192
12036
1.500
2.000
2.750
3.750
4.750
.974
1.474
1.974
2.974
3.974
FACE WIDTH - .125”
YI4848
12020
YI4872
12022
YI4896
12024
YI48144
12026
YI48192
12028
2.000
2.750
3.750
4.750
6.750
1.461
1.961
2.961
3.961
5.961
FACE WIDTH - .188”
YI3248
12010
YI3264
12012
YI3296
12014
YI32128
12016
YI32192
12018
2.250
2.750
3.750
4.750
6.750
1.450
1.950
2.950
3.950
5.950
FACE WIDTH - .250”
YI2436
12000
YI2448
12002
YI2472
12004
YI2496
12006
YI24144
12008
64
48
DIAMETRAL PITCH
48
1.000
72
1.500
96
2.000
144
3.000
192
4.000
32
FACE
PITCH
DIA.
INSIDE
DIA.
OUTSIDE
DIA.
DIAMETRAL PITCH
48
1.500
64
2.000
96
3.000
128
4.000
192
6.000
24
DIAMETRAL PITCH
36
1.500
48
2.000
72
3.000
96
4.000
144
6.000
Catalog
Number
Item
Code
NOTE: The difference in tooth numbers between Gear and Pinion should not be less than 12.
STANDARD TOLERANCES
DIMENSION
64 Pitch
48 Pitch
I.D.
32 Pitch
24 Pitch
O.D.
All
All
All
All
All
TOLERANCE
+.004 – .000
+.005 – .000
+.006 – .000
+.008 – .000
+.001 + .003
PINION
PITCH DIA.
(d)
CENTER DISTANCE
GEAR
PITCH DIA.
(D)
CENTER = D – d
DISTANCE
2
48
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Boston spur gears are designed to transmit motion or power between
parallel shafts. Configurations include spur, rack, pinion wire, stem pinions
and internal gears; most with a selection of bores, keyways and setscrews.
Styles include plain, web, web with lightening holes or spoked. Change
gears have consecutive numbers of teeth for reduction uses.
A
Boston fine-pitch spur gears are available in Delrin and Brass.
Configurations include spur, rack, pinion wire and internal gears; most
with a selection of bores, keyways, and setscrews. Styles include plain,
web with lightening holes or spoked.
Selection Procedure
Selection Hints
1. Determine service factor.
a.
Using application Classification Chart, pages 322323, determine service factor or
b. With knowledge of operating conditions and load
classification, select service factor from Table 1
below.
A. Select pinion having pitch diameter at least twice the
shaft diameter.
B. Pinion number of teeth should be greater than 16 for
141⁄2°PA and 13 for 20°PA to avoid excessive undercutting.
C. For tooth numbers or RPMs not on Chart, interpolation
of horsepower is adequate.
Design HP = Application Load X Service Factor (Table 1)
3. Select spur gear pinion with horsepower capacity equal to
(or greater than) design horsepower determined in Step 2.
141⁄2° Pressure Angle Spur Gears—Page 50 to Page 57.
20° Pressure Angle Spur Gears— Page 58 to Page 62.
4. Select a driven spur gear with a catalog rating equal to or
greater than the horsepower determined in Step 2. All
ratings are predicated on gears properly lubricated and
maintained.
D.Pitchline velocities above 1000 FPM are not
recommended for metallic spur gears. The Selection
Chart reflects this in the lack of ratings for larger numbers
of teeth at higher RPM’s. Ratings to the right of heavy line
are not recommended, as suggested maximum velocity
is exceeded, and should be used for interpolation
purposes only.
TABLE 1
Service
Factor
.8
1.0
1.25
1.50
1.75
2.0
Operating Conditions
Uniform — not more than 15 minutes in 2 hours.
Moderate Shock — not more than 15 minutes in 2 hours.
Uniform — not more than 10 hours per day.
Moderate Shock — not more than 10 hours per day.
Uniform — more than 10 hours per day.
Heavy Shock — not more than 15 minutes in 2 hours.
Moderate Shock — more than 10 hours per day.
Heavy Shock — not more than 10 hours per day.
Heavy Shock — more than 10 hours per day.
Heavy shock loads and/or severe wear conditions may
require the use of higher service factors. Consultation with
factory is recommended in these applications.
P-1930-BG
04/10
Boston Gear 800-825-6544
49
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
32 DIAMETRAL PITCH STEEL
A
25 RPM
50 RPM
100 RPM
141⁄2° PRESSURE ANGLE
200 RPM
300 RPM
3/16" FACE
600 RPM
900 RPM
REFERENCE PAGE 19.
1200 RPM
1800 RPM
3600 RPM
No.
Teeth
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
H.P.
Torque
16
18
20
22
24
26
28
30
32
40
48
56
64
80
96
128
160
192
.003
7.4
.003
8.9
.004 10.2
.005 11.7
.01
13.0
.01
14.5
.01
15.9
.01
17.3
.01
18.9
.01
24.5
.01
29.9
.01
35.7
.02
41.4
.02
52.4
.02
62.6
.03
83.9
.04 106
.05 126
.24
.27
.30
.32
.34
.37
.39
.40
.43
.48
.52
.55
.58
4.2
4.7
5.2
5.7
6.0
6.4
6.8
7.0
7.4
8.4
9.0
9.7
10.2
.01
7.3
.01
8.8
.01 10.2
.01 11.6
.01 12.9
.01 14.4
.01 15.1
.01 17.0
.01 18.7
.02 24.2
.02 29.4
.03 35
.03 40.6
.04 51
.05 60.6
.06 80.6
.08 101
.09 119
.01
7.3
.01
8.7
.02 10.1
.02 11.4
.02 12.7
.02 14.1
.02 15.5
.03 16.7
.03 18.3
.04 23.6
.05 28.5
.05 33.8
.06 38.9
.08 48.5
.09 57.1
.12 74.6
.15 92.1
.17 107
24 DIAMETRAL PITCH STEEL
25 RPM
.03
.04
.05
.05
.06
.06
.07
.07
.08
.10
.12
.14
.16
.19
.22
.27
.32
.36
7.0
8.3
9.6
10.8
11.9
13.3
14.5
15.5
16.9
21.3
25.4
29.6
33.5
40.6
46.4
57.5
67.8
75.4
.06
.07
.08
.09
.10
.12
.12
.13
.14
.18
.21
.24
.26
.31
.34
.41
.46
.50
6.6
7.8
8.9
9.9
10.9
12.0
13.1
13.9
15.2
18.7
21.8
24.9
27.8
32.5
36.2
42.7
48.6
52.4
141⁄ 2° PRESSURE ANGLE
.11
.13
.15
.16
.18
.20
.21
.22
.24
.29
.32
.36
.39
.44
.48
.54
5.9
6.9
7.8
8.7
9.4
10.2
11.0
11.7
12.6
15
17
18.9
20.7
23.3
25.1
28.3
1/4" FACE
REFERENCE PAGE 20.
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
H.P. Torque
H.P.
Torque
.22
.28
.31
.33
.38
.42
.45
.50
.60
.68
.74
.80
.89
.96
.35
.43
.46
.49
.55
.61
.63
.69
.80
.89
.94
.99
6.1
7.5
8.0
8.6
9.7
10.6
11.0
12.0
13.9
15.5
16.5
17.4
.05
.06
.07
.08
.09
.11
.11
.13
.17
.21
.24
.27
.33
.39
.48
.56
.62
10.3
13.3
14.7
16.2
19.2
22.1
23.6
27.5
35.5
43.5
50.3
57
69.6
81
100
118
131
.09
.12
.13
.14
.17
.19
.20
.23
.30
.36
.40
.45
.53
.60
.71
.80
.86
9.7
12.4
13.7
15
17.6
20.1
21.4
24.6
31.1
37.3
42.4
47.2
55.9
63.2
74.7
84.3
90.8
900 RPM
5.4
6.1
6.9
7.6
8.3
8.9
9.5
10.0
10.7
12.5
13.9
15.3
16.5
18.2
19.2
.004
.01
.01
.01
.01
.01
.01
.01
.02
.02
.02
.03
.04
.04
.06
.07
.09
.03
10.5
.04
13.6
.05
15.1
.05
16.7
.06
19.8
.07
22.9
.08
24.5
.09
28.5
.12
37.2
.15
46
.17
53.6
.19
61.3
.24
75.9
.28
89.5
.36 113
.43 135
.49 153
600 RPM
.15
.18
.20
.22
.24
.26
.27
.29
.31
.36
.40
.44
.47
.52
.55
12
14
15
16
18
20
21
24
30
36
42
48
60
72
96
120
144
.02
10.7
.02
13.9
.02
15.5
.03
17.2
.03
20.4
.04
23.7
.04
25.4
.05
29.7
.06
39.2
.08
48.8
.09
59.5
.11
66.2
.13
83.3
.16
99.8
.21 130
.25 159
.29 185
300 RPM
6.3
7.3
8.3
9.3
10.1
11.1
12.0
12.7
13.7
16.7
19.1
21.6
23.7
27.2
29.6
34
37.9
40.1
1800 RPM
10.8
14.1
15.7
17.4
20.7
24.1
25.8
30.4
40.2
50.4
59.6
68.9
87.7
106
141
175
207
200 RPM
.09
.10
.12
.13
.14
.16
.17
.18
.20
.24
.27
.31
.34
.39
.42
.49
.54
.57
No.
Teeth
.01
.01
.01
.01
.02
.02
.02
.02
.03
.04
.05
.05
.07
.08
.11
.14
.16
100 RPM
7.1
8.5
9.8
11.1
12.3
13.7
14.9
16.1
17.6
22.4
26.8
31.5
36
44.2
51.2
64.9
78.2
88.4
1200 RPM
10.9
14.2
15.8
17.5
20.9
24.3
26.1
30.7
40.7
51.2
60.7
70.4
90
109
147
185
219
50 RPM
.02
.03
.03
.04
.04
.04
.05
.05
.06
.07
.09
.10
.11
.14
.16
.21
.25
.28
.13
.17
.18
.20
.23
.26
.28
.32
.40
.47
.52
.58
.67
.74
.85
.94
.99
9.2
11.6
12.8
14
16.3
18.5
19.6
22.3
27.7
32.7
36.6
40.3
46.6
51.8
59.5
65.7
69.6
.17
.21
.23
.25
.29
.33
.34
.39
.48
.55
.61
.67
.76
.84
.94
1.07
8.7
10.9
12
13.1
15.1
17.1
18.1
20.4
24.9
29.1
32.3
35.1
40
43.9
49.5
56.4
7.9
9.8
10.7
11.6
13.3
14.8
15.6
17.4
20.8
23.9
26
28
31.2
33.6
3600 RPM
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
* Torque Ratings (Lb. Ins.).
Ratings for brass gears are approximately 50% of steel ratings with same face width.
50
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
20 DIAMETRAL PITCH STEEL
No.
Teeth
11
12
13
14
15
16
18
20
22
24
25
28
30
32
35
36
40
48
50
60
64
25 RPM
50 RPM
141⁄2° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
3/8" FACE
600 RPM
900 RPM
REFERENCE PAGE 20.
1200 RPM
1800 RPM
3600 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
H.P.
Torque
.01
.01
.01
.01
.01
.02
.02
.02
.02
.03
.03
.03
.03
.04
.04
.04
.05
.06
.06
.08
.08
.66
.70
.77
.84
.90
.97
1.08
1.18
1.26
1.33
1.38
1.47
1.52
1.59
1.66
1.68
1.75
11.6
12.2
13.4
14.7
15.8
16.9
18.9
20.6
22.1
23.3
24.0
25.7
26.6
27.8
29.1
29.3
30.7
21.6
23.5
26.9
30.7
34.2
37.8
45.1
52.4
59.5
66.3
70.5
81.2
87.8
96.3
107
110
124
151
158
193
209
.02
.02
.02
.02
.03
.03
.04
.04
.05
.05
.06
.06
.07
.08
.08
.09
.10
.12
.12
.15
.16
21.4
23.4
26.8
30.5
33.9
37.5
44.7
51.9
58.8
65.4
69.5
80
86.4
94.7
105
108
122
148
154
187
203
.03
.04
.04
.05
.05
.06
.07
.08
.09
.10
.11
.12
.13
.15
.16
.17
.19
.22
.23
.28
.30
21.2
23
26.4
30
33.4
36.8
43.8
50.8
57.5
63.8
67.7
77.7
83.7
91.6
101
104
117
141
146
176
190
.07
.07
.08
.09
.10
.11
.13
.15
.17
.19
.20
.23
.25
.27
.30
.31
.34
.41
.42
.50
.54
20 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
20.7
22.5
25.7
29.1
32.3
35.7
42.3
48.7
54.9
60.8
64.4
73.4
78.9
86
94.7
97.1
108
128
133
158
169
.10
.10
.12
.13
.15
.16
.19
.22
.25
.28
.29
.33
.36
.39
.42
.43
.48
.56
.58
.68
.73
20.2 .18 18.9
21.9 .19 20.5
25
.22 23.2
28.3 .25 26.1
31.4 .27 28.8
34.5 .30 31.6
40.8 .35 36.9
46.9 .40 42
52.7 .45 46.8
58
.49 51.1
61.4 .51 53.8
69.7 .57 60.3
74.6 .61 64
81
.66 69.1
88.9 .71 74.9
91
.73 76.4
101
.79 83.5
118
.91 95.4
122
.93 98
143
1.06 112
153
1.12 118
.25
.27
.31
.35
.38
.41
.48
.54
.60
.65
.68
.76
.80
.86
.92
.94
1.02
1.14
1.17
1.31
1.37
141⁄2° PRESSURE ANGLE
200 RPM
300 RPM
600 RPM
17.8
19.2
21.6
24.2
26.6
29
33.7
38
42
45.6
47.9
53.2
56.1
60.2
64.7
65.8
71.2
80
81.7
91.6
96
.32
.34
.39
.43
.47
.51
.59
.66
.73
.78
.82
.91
.95
1.02
1.09
1.10
1.18
1.31
1.34
1.48
1.54
16.8
18
20.3
22.6
24.7
26.9
31
34.8
38.2
41.2
43.1
47.5
50
53.3
57
57.8
62.1
69.8
70.1
77.6
80.9
3/8" FACE
900 RPM
.43
.46
.51
.57
.62
.67
.76
.85
.92
.99
1.03
1.12
1.17
1.24
1.31
1.33
1.41
1.54
1.56
1.70
15.1
16.1
17.9
20
21.7
23.4
26.7
29.7
32.3
34.6
36
39.2
40.9
43.4
46
46.5
49.4
53.8
54.6
59.5
REFERENCE PAGE 21.
1200 RPM
1800 RPM
No.
Teeth
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
70
72
80
84
90
96
100
112
120
140
144
160
180
200
.05
.06
.06
.07
.07
.07
.08
.09
.09
.11
.11
.13
.14
.15
137
140
158
166
177
189
196
222
237
273
281
317
353
388
.10
.11
.12
.13
.13
.14
.15
.17
.18
.20
.21
.23
.26
.28
132
136
152
159
169
180
186
210
223
255
262
294
324
354
.20
.20
.22
.23
.25
.26
.27
.30
.32
.36
.37
.41
.44
.48
123
126
141
147
155
164
170
189
200
225
230
256
278
300
.35
.35
.39
.40
.42
.44
.46
.50
.53
.58
.59
.64
.69
.73
109
111
123
127
133
140
144
158
166
183
186
203
217
230
.46
.47
.52
.53
.56
.58
.59
.65
.67
.73
.74
.80
.85
.89
97.5
99.4
108
112
117
122
125
136
141
153
156
168
178
187
.71
.72
.77
.79
.81
.84
.85
.91
.93
.99
1.00
1.06
1.10
1.13
74.2 .86
75.3 .87
80.7 .92
82.7 .94
85.4 .96
87.9 .98
89.5 1.00
95.5 1.05
98.1 1.07
104
105
111
115
119
60
60.6
64.3
65.5
67.2
68.8
69.7
73.6
75.1
.96
.97
1.02
1.03
3600 RPM
H.P. Torque
50.2
50.7
53.4
54.3
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
P-1930-BG
04/10
Boston Gear 800-825-6544
51
A
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
16 DIAMETRAL PITCH STEEL
No.
Teeth
A
11
12
13
14
15
16
18
20
22
24
26
28
30
32
36
40
48
25 RPM
50 RPM
141⁄ 2° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
1/2" FACE
600 RPM
900 RPM
REFERENCE PAGE 21 & 22.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
H.P.
Torque
.02
.02
.02
.03
.03
.03
.04
.04
.05
.05
.06
.07
.07
.08
.09
.10
.12
1.24
1.29
1.42
1.55
1.66
1.77
1.96
2.13
2.27
2.38
2.51
2.62
2.69
2.81
21.7
22.6
24.9
27.1
29.0
30.9
34.3
37.2
39.7
41.7
43.9
45.8
47.1
49.3
44.9
48.9
56.1
63.8
71.1
78.7
93.8
109
124
138
154
168
182
200
228
258
314
.04
.04
.04
.05
.06
.06
.07
.09
.10
.11
.12
.13
.14
.16
.18
.20
.24
44.5
48.5
55.6
63.2
70.3
77.8
99.6
107
122
135
151
165
179
196
223
251
304
.07
.08
.09
.10
.11
.12
.14
.17
.19
.21
.23
.25
.27
.30
.34
.38
.45
43.9
47.8
54.7
62
68.9
76.2
90.5
105
118
131
146
160
172
188
213
239
286
.14
.15
.17
.19
.21
.23
.27
.32
.36
.39
.43
.47
.51
.55
.62
.69
.81
16 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
42.7 .20
46.3 .21
52.9 .24
59.8 .28
66.4 .30
73.1 .33
86.5 .39
99
.45
112
.51
124
.56
137
.61
149
.66
160
.71
174
.77
196
.86
217
.95
257
1.11
41.5
44.9
51.2
57.8
63.9
70.3
82.8
94.9
106
117
129
140
149
162
181
200
232
.36
.39
.44
.50
.55
.60
.70
.79
.88
.96
1.04
1.12
1.19
1.28
1.40
1.52
1.73
38.3
41.2
46.7
52.4
57.6
63
73.4
83.2
92.3
100
110
118
125
134
147
160
181
.51
.54
.61
.68
.75
.82
.94
1.06
1.16
1.26
1.36
1.45
1.53
1.63
1.77
1.91
2.12
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
35.6
38.1
42.9
47.9
52.5
57.1
65.9
74.1
81.5
88
95.4
102
107
114
124
134
149
.63
33.2
.67
35.4
.76
39.7
.84
44.2
.92
48.1
.99
52.2
1.14 59.8
1.27 66.7
1.39 72.9
1.49 78.3
1.61 84.4
1.71 89.6
1.79 93.8
1.90 99.7
2.05 107
2.18 115
2.40 126
1/2" FACE
600 RPM
900 RPM
.84
.89
.99
1.09
1.18
1.27
1.44
1.59
1.72
1.83
1.96
2.06
2.15
2.27
2.42
2.55
2.76
29.4
31
34.6
38.2
41.3
44.5
50.4
55.7
60.3
64.2
68.6
72.3
75.1
79.4
84.6
89.4
96.5
REFERENCE PAGE 22.
1200 RPM
1800 RPM
No.
Teeth
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
54
56
60
64
72
80
84
96
112
120
128
144
160
192
.09
.09
.10
.10
.12
.13
.14
.15
.18
.19
.20
.23
.26
.307
217
224
239
260
290
327
342
388
455
486
516
574
648
762
.17
.17
.18
.20
.22
.25
.26
.29
.34
.36
.38
.42
.47
.54
209
216
231
249
277
311
325
365
425
452
477
527
590
683
.31
.32
.34
.37
.40
.45
.47
.52
.60
.63
.66
.72
.79
.90
196
202
214
231
255
283
294
327
376
396
415
453
500
566
.55
.57
.60
.64
.69
.76
.79
.86
.97
1.01
1.05
1.12
1.22
1.34
16 DIAMETRAL PITCH NON-METALLIC
No.
Teeth
3600 RPM
25 RPM
50 RPM
100 RPM
173
178
188
201
219
240
248
271
304
318
330
353
384
421
.74
.76
.80
.85
.91
.99
1.02
1.10
1.22
1.26
1.30
1.38
1.48
1.60
156
160
167
178
192
208
214
231
256
265
274
289
311
335
1.13
1.16
1.20
1.26
1.33
1.42
1.45
1.53
1.65
1.69
1.72
1.79
1.89
119
121
126
132
140
149
152
161
173
177
181
188
198
1.38
1.40
1.44
1.50
1.57
1.66
1.69
1.76
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
600 RPM
96.6
98.1
100
105
110
116
118
123
1.54
1.57
1.60
1.67
.06
.09
.11
.14
.18
.21
.26
19
28
34
44
57
63
82
.09
.12
.15
.19
.24
.28
.34
19
30
31
40
50
58
71
.15
.20
.24
.31
.38
.44
.54
16
21
25
32
40
46
57
.20
.26
.31
.40
.49
.60
.72
14
18
22
28
34
40
50
.25
.32
.38
.49
.62
.72
.88
Torque
REFERENCE PAGE 22.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
16
20
24
32
40
48
64
H.P.
81.1
82.2
84.2
87.5
1/2" FACE
900 RPM
3600 RPM
13
17
20
26
32
37
46
.32
.42
.50
.65
.82
.96
1.20
11
15
17
23
29
33
42
3600 RPM
H.P.
Torque
.56
.69
.82
1.12
1.41
1.65
9
12
14
20
25
29
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: 1. Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
2. Non-metallic gears are most commonly used for the driving pinion of a pair of gears, with mating gear made of Cast Iron or Steel, where pitch line velocities
exceed 1000 FPM and are not subjected to shock loads.
*Torque Ratings (Lb. Ins.).
52
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
12 DIAMETRAL PITCH STEEL
No.
Teeth
11
12
13
14
15
16
18
20
21
22
24
30
32
36
40
42
25 RPM
50 RPM
141⁄ 2° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
3/4" FACE
600 RPM
900 RPM
REFERENCE PAGE 22.
1200 RPM
1800 RPM
H.P. Torque
H.P. Torque H.P. Torque
H.P. Torque
H.P. Torque
H.P. Torque
H.P. Torque H.P. Torque H.P. Torque
H.P.
Torque
.05
.05
.06
.07
.07
.08
.10
.11
.12
.13
.14
.19
.21
.24
.27
.28
.09
.10
.12
.13
.15
.16
.19
.23
.24
.26
.28
.37
.41
.46
.52
.55
.35
.38
.44
.49
.55
.60
.71
.82
.87
.92
1.01
1.29
1.40
1.57
1.74
1.80
.51
.55
.63
.71
.78
.86
1.01
1.15
1.22
1.28
1.41
1.78
1.92
2.13
2.34
2.42
.93
.99
1.12
1.25
1.37
1.50
1.73
1.95
2.06
2.15
2.33
2.85
3.05
3.33
3.59
3.69
1.27
1.35
1.51
1.68
1.83
1.99
2.28
2.54
2.67
2.78
2.98
3.57
3.80
4.09
4.37
4.46
2.82
2.92
3.19
3.46
3.69
3.91
4.31
4.65
4.81
4.93
5.14
49.4
51.1
55.9
60.6
64.6
68.5
75.4
81.4
84.3
86.2
90.0
119
130
149
169
189
209
249
289
310
328
365
483
529
605
682
715
118
129
147
167
186
206
245
284
304
322
357
470
514
586
659
689
.18
.20
.23
.26
.29
.32
.38
.44
.47
.49
.54
.71
.77
.88
.98
1.02
116
126
144
163
181
200
237
274
293
310
343
447
488
552
617
644
12 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
112
120
138
156
172
190
224
257
274
288
317
407
442
495
547
568
108
116
132
149
164
180
242
215
257
270
296
373
403
448
492
509
97
104
118
131
144
157
182
205
216
226
245
299
320
349
377
387
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
88.6
94.4
106
118
128
139
159
178
187
195
209
250
266
286
306
312
1.55
1.64
1.83
2.03
2.20
2.38
2.70
2.99
3.14
3.25
3.47
4.09
4.32
4.62
4.90
4.99
81.5
86.3
96.3
107
116
125
142
157
164
171
182
215
227
243
257
262
3/4" FACE
600 RPM
900 RPM
2.00
2.10
2.33
2.56
2.76
2.96
3.32
3.64
3.80
3.92
4.14
4.78
5.02
5.31
70
73.6
81.6
89.6
96.6
103
116
127
133
137
145
167
176
186
REFERENCE PAGE 23.
1200 RPM
1800 RPM
No.
Teeth
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
48
54
60
64
72
84
96
108
112
120
144
168
.20
.23
.25
.27
.30
.36
.40
.46
.47
.50
.59
.69
497
571
631
683
762
896
1014
1148
1187
1264
1487
1745
.38
.43
.48
.51
.57
.66
.74
.84
.86
.91
1.06
1.22
477
545
600
647
718
837
938
1054
1087
1150
1333
1541
.70 441
.79 500
.87 546
.93 586
1.02 644
1.17 739
1.30 817
1.44 906
1.47 929
1.55 975
1.75 1103
1.98 1248
1.22
1.36
1.47
1.56
1.69
1.90
2.06
2.24
2.29
2.37
2.61
2.87
12 DIAMETRAL PITCH NON-METALLIC
No.
Teeth
3600 RPM
25 RPM
50 RPM
100 RPM
384
430
463
493
533
598
649
706
720
748
821
905
1.62
1.79
1.91
2.02
2.17
2.40
2.56
2.76
2.80
2.89
3.11
3.38
340
377
402
425
455
503
538
579
588
607
654
710
2.41
2.62
2.74
2.87
3.01
3.24
3.39
3.58
3.62
3.69
3.86
253
275
288
301
316
340
356
376
379
387
406
2.88
3.09
3.21
3.33
3.46
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
600 RPM
201
216
224
233
242
3.19
3.40
REFERENCE PAGE 23.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
15
18
21
24
30
36
48
60
.13
.19
.23
.27
.34
.40
.51
.60
41
60
72
85
107
126
161
189
.20
.26
.31
.36
.44
.52
.66
.80
42
54
65
76
92
109
138
168
.34
.43
.50
.58
.73
.82
1.05
1.29
36
45
52
60
76
86
110
135
.45
.56
.66
.76
.95
1.13
1.39
1.72
31
39
46
53
66
79
97
120
.56
.68
.81
.92
1.14
1.36
1.70
2.13
Torque
167
178
3/4" FACE
900 RPM
3600 RPM
H.P.
29
36
42
48
60
71
89
112
.72
.90
1.06
1.22
1.56
1.83
2.33
2.95
25
31
37
42
54
64
81
103
3600 RPM
H.P.
Torque
1.15
1.44
1.80
2.07
2.64
3.18
20
25
31
36
46
56
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: 1. Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
2. Non-metallic gears are most commonly used for the driving pinion of a pair of gears, with mating gear made of Cast Iron or Steel, where pitch line velocities
exceed 1000 FPM and are not subjected to shock loads.
*Torque Ratings (Lb. Ins.).
P-1930-BG
04/10
Boston Gear 800-825-6544
53
A
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
10 DIAMETRAL PITCH STEEL
No.
Teeth
A
11
12
14
15
16
18
20
24
25
28
30
32
35
36
25 RPM
50 RPM
141⁄ 2° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
1" FACE
600 RPM
900 RPM
REFERENCE PAGE 23.
1200 RPM
1800 RPM
H.P.
Torque
.09
.10
.13
.14
.16
.19
.22
.28
.29
.34
.37
.40
.45
.46
4.85
5.00
5.89
6.25
6.62
7.25
7.79
85
88
103
109
116
127
136
229
249
325
362
400
447
553
698
742
854
922
1010
1123
1153
.18
226
.20
246
.25
320
.28
356
.31
393
.37
468
.43
542
.54
681
.57
722
.66
829
.71
893
.78
977
.86 1083
.88 1111
.35
221 .67
.38
240 .73
.49
311 .93
.55
345 1.03
.60
381 1.13
.72
451 1.33
.83
520 1.53
1.03
648 1.88
1.09
687 1.98
1.24
784 2.24
1.34
842 2.39
1.46
917 2.59
1.60 1011 2.83
1.64 1036 2.89
10 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
211
229
294
325
357
420
481
592
625
707
754
817
893
912
.96
1.04
1.33
1.46
1.60
1.87
2.13
2.59
2.73
3.06
3.25
3.51
3.80
3.88
202
218
279
307
337
394
448
545
574
644
683
737
799
815
1.71
1.83
2.30
2.51
2.73
3.15
3.53
4.19
4.38
4.83
5.07
5.41
5.79
5.87
179
192
241
264
287
330
371
440
460
507
533
569
608
617
2.31
2.45
3.04
3.30
3.57
4.07
4.52
5.26
5.49
5.98
6.24
6.61
7.01
7.09
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
162
172
213
231
250
285
317
369
384
419
437
463
491
496
2.80
2.95
3.62
3.92
4.22
4.76
5.26
6.04
6.28
6.79
7.05
7.44
7.83
7.91
147
155
190
206
221
250
276
317
330
357
370
391
411
415
1" FACE
600 RPM
900 RPM
3.55
3.71
4.49
4.82
5.15
5.75
6.28
7.09
7.34
7.85
8.10
124
130
157
169
180
201
220
248
257
275
283
REFERENCE PAGE 24.
1200 RPM
1800 RPM
No.
Teeth
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
40
42
45
48
50
54
55
60
64
70
72
80
84
90
96
100
110
120
140
144
160
180
.31
.32
.35
.38
.39
.43
.44
.48
.51
.56
.57
.64
.67
.72
.76
.79
.87
.94
1.08
1.11
1.24
1.37
780
818
889
946
983
1083
1105
1199
1297
1410
1447
1623
1697
1807
1916
1988
2203
2380
2724
2791
3132
3459
.59
.62
.67
.71
.74
.82
.83
.90
.97
1.04
1.07
1.19
1.24
1.32
1.39
1.44
1.58
1.69
1.91
1.95
2.16
2.36
749
783
850
901
935
1029
1046
1130
1217
1316
1349
1502
1565
1659
1750
1810
1990
2133
2405
2457
2727
2971
1.10
1.15
1.24
1.31
1.35
1.48
1.50
1.61
1.72
1.84
1.88
2.07
2.15
2.26
2.37
2.44
2.64
2.80
3.09
3.15
3.44
3.68
693
722
780
823
851
931
945
1013
1084
1162
1187
1308
1355
1425
1492
1535
1667
1766
1949
1983
2166
2318
1.92
1.99
2.13
2.23
2.29
2.48
2.51
2.66
2.82
2.99
3.04
3.30
3.39
3.53
3.65
3.74
3.99
4.17
4.48
4.54
4.87
5.11
10 DIAMETRAL PITCH NON-METALLIC
No.
Teeth
3600 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
25 RPM
50 RPM
100 RPM
603
626
670
701
722
782
791
839
890
942
958
1039
1069
1111
1152
1177
1258
1314
1413
1430
1535
1609
2.54
2.63
2.79
2.91
2.98
3.21
3.24
3.41
3.59
3.77
3.82
4.10
4.10
4.34
4.46
4.54
4.81
4.98
5.27
5.33
5.66
5.87
534
552
587
611
626
674
681
716
755
792
803
861
882
911
938
955
1011
1047
1108
1119
1188
1233
3.79
3.88
4.08
4.20
4.27
4.53
4.57
4.73
4.93
5.10
5.15
5.43
5.51
5.63
5.73
5.80
6.05
6.18
398
407
428
441
449
476
480
497
518
535
541
570
579
591
602
609
636
650
4.52
4.61
4.81
4.92
4.99
5.26
5.29
5.43
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
600 RPM
317
323
337
345
350
368
371
381
5.01
5.09
.27
.33
.40
.51
.62
85
104
126
161
195
.38
.47
.54
.67
.81
80
99
113
140
170
.63
.78
.88
1.09
1.29
66
82
92
114
135
.83
58
1.02
71
1.15
80
1.42
99
1.69 118
1.00
1.24
1.39
1.73
2.07
Torque
REFERENCE PAGE 23.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
15
18
20
25
30
H.P.
263
267
1" FACE
900 RPM
3600 RPM
52
65
73
90
109
1.31
1.63
1.85
2.32
2.80
46
57
65
81
98
3600 RPM
H.P.
Torque
2.08
2.60
3.12
4.00
4.89
36
45
55
70
86
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: 1. Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
2. Non-metallic gears are most commonly used for the driving pinion of a pair of gears, with mating gear made of Cast Iron or Steel, where pitch line velocities
exceed 1000 FPM and are not subjected to shock loads.
*Torque Ratings (Lb. Ins.).
54
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
8 DIAMETRAL PITCH STEEL
No.
Teeth
11
12
14
15
16
18
20
22
24
28
30
32
25 RPM
50 RPM
141⁄ 2° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
1-1/4" FACE
600 RPM
900 RPM
REFERENCE PAGE 24.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.18
.19
.25
.28
.31
.37
.43
.48
.54
.66
.71
.78
446
485
632
703
778
927
1075
1219
1355
1655
1786
1957
.35
.38
.49
.55
.60
.72
.83
.94
1.04
1.27
1.36
1.49
439
478
620
690
762
905
1047
1184
1313
1596
1718
1878
.68
.73
.95
1.05
1.16
1.37
1.58
1.78
1.96
2.37
2.53
2.76
427
463
599
664
731
865
996
1121
1237
1490
1598
1738
1.28
1.38
1.77
1.96
2.15
2.52
2.88
3.21
3.52
4.18
4.44
4.80
8 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
404
436
559
617
677
794
907
1012
1109
1316
1400
1513
1.82
1.96
2.49
2.74
3.00
3.49
3.96
4.39
4.78
5.61
5.93
6.38
383
412
524
576
630
734
832
923
1004
1178
1247
1340
3.16
3.37
4.21
4.58
4.97
5.69
6.35
6.95
7.46
8.53
8.93
9.49
332 4.19 294
5.00
354 4.43 310
5.26
442 5.45 382
6.40
481 5.90 413
6.89
522 6.36 445
7.39
598 7.20 504
8.30
667 7.96 557
9.10
730 8.62 603
9.79
783 9.17 642 10.36
896 10.33 723 11.54
938 10.73 752 11.94
997 11.34 794 12.56
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
600 RPM
263 6.21
276 6.47
336 7.75
362 8.29
388 8.83
436 9.80
478 10.64
514 11.34
544 11.90
606
627
660
1-1/4" FACE
900 RPM
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.53
.60
.63
.67
.72
.83
.86
.92
.99
1.10
1.23
1.29
1.34
1.45
1.69
1.79
1.89
2.09
2.33
1279
1434
1498
1591
1719
1958
2021
2145
2307
2548
2828
2943
3056
3277
3757
3960
4155
4528
4980
1.86
2.07
2.16
2.28
2.44
2.75
2.83
2.98
3.19
3.47
3.81
3.94
4.06
4.31
4.83
5.04
5.24
5.60
6.07
1174
1305
1358
1437
1540
1735
1784
1880
2008
2188
2398
2481
2561
2713
3045
3176
3300
3532
3828
3.20
3.51
3.63
3.82
4.05
4.48
4.59
4.79
5.06
5.42
5.84
5.99
6.13
6.41
7.01
7.22
7.42
7.78
8.28
8 DIAMETRAL PITCH NON-METALLIC
No.
Teeth
25 RPM
50 RPM
100 RPM
884
961
989
1036
1088
1192
1215
1259
1323
1399
1492
1523
1553
1608
1731
1773
1811
6.14
6.55
6.69
6.95
7.19
7.72
7.83
8.01
8.33
8.64
9.06
9.18
9.30
9.50
645
688
703
730
756
811
822
842
875
908
952
965
976
998
7.25
7.66
7.78
8.05
8.27
300 RPM
600 RPM
25 RPM
50 RPM
176
192
233
283
334
.76
.88
.99
1.19
1.38
160
185
208
250
290
1.23
1.41
1.59
1.90
2.20
129
148
167
200
231
141⁄ 2° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
900 RPM
1200 RPM
1.61
1.84
2.08
2.50
2.91
112
129
146
175
204
1.96
2.25
2.54
3.06
3.57
103
118
133
160
187
1-1/2" FACE
600 RPM
946
1030
1340
1491
1648
1962
2273
2436
2860
3335
3761
.74
.80
1.04
1.15
1.27
1.51
1.74
1.86
2.18
2.53
2.84
928
1008
1308
1452
1603
1902
2196
2349
2745
3186
3576
1.42
1.54
1.98
2.19
2.41
2.84
3.26
3.48
4.03
4.64
5.17
893
968
1247
1381
1519
1792
2057
2194
2541
2924
3255
2.64
2.84
3.62
3.99
4.37
5.10
5.79
6.15
7.02
7.97
8.76
832 3.70 778
896 3.97 834
1142 5.01 1053
1257 5.49 1154
1376 5.98 1257
1606 6.92 1455
1825 7.81 1640
1937 8.25 1734
2212 9.32 1958
2512 10.48 2201
2761 11.41 2396
6.20
6.57
8.12
8.81
9.51
10.80
11.97
12.56
13.87
15.29
16.35
652
691
853
925
999
1135
1258
1319
1457
1606
1717
900 RPM
8.01
8.41
10.24
11.03
11.83
13.28
14.57
15.20
16.57
18.05
19.10
H.P. Torque
REFERENCE PAGE 24.
1800 RPM
2.60
3.00
3.40
4.13
4.86
91
105
119
144
170
561
589
717
773
828
930
1020
1065
1160
1264
1338
9.37
9.78
11.77
12.62
13.47
15.00
16.33
16.99
18.35
3600 RPM
H.P. Torque
4.39
4.71
5.84
7.22
77
82
102
126
REFERENCE PAGE 25.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.38
.41
.53
.59
.65
.78
.90
.97
1.13
1.32
1.49
3600 RPM
507
536
545
564
579
141⁄ 2° PRESSURE ANGLE 1-1/4" FACE
200 RPM
.56
.61
.74
.90
1.06
6 DIAMETRAL PITCH STEEL
11
12
14
15
16
18
20
21
24
27
30
4.21
4.57
4.71
4.93
5.18
5.67
5.78
5.99
6.30
6.66
7.10
7.25
7.39
7.65
8.24
8.44
8.62
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
16
18
20
24
28
No.
Teeth
1009
1107
1145
1204
1275
1413
1446
1508
1595
1707
1839
1887
1933
2019
2207
2275
2339
2452
2610
143
147
172
182
192
REFERENCE PAGE 25.
36
40
42
44
48
54
56
60
64
72
80
84
88
96
112
120
128
144
160
1.01
1.14
1.19
1.26
1.36
1.55
1.60
1.70
1.83
2.02
2.24
2.34
2.42
2.60
2.98
3.14
3.30
3.59
3.95
H.P. Torque
217 8.17
226 8.39
271 9.81
290 10.39
309 10.96
343
372
397
417
No.
Teeth
1339
1508
1579
1681
1824
2092
2164
2307
2492
2775
3107
3246
3384
3656
4256
4517
4773
5272
5868
3600 RPM
492
514
618
663
708
788
858
892
964
11.29
11.69
13.85
14.75
15.65
17.23
3600 RPM
H.P. Torque
395 14.19 249
409 14.51 254
485
517
548
603
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
P-1930-BG
04/10
Boston Gear 800-825-6544
55
A
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
6 DIAMETRAL PITCH CAST IRON
A
25 RPM
50 RPM
100 RPM
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
600 RPM
1-1/2" FACE
900 RPM
REFERENCE PAGE 26.
1200 RPM
1800 RPM
No.
Teeth
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
32
33
36
40
42
48
54
60
64
66
72
84
96
108
120
144
.98 2470
1.01 2543
1.12 2813
1.25 3163
1.31 3310
1.51 3814
1.73 4364
1.90 4801
2.05 5177
2.11 5322
2.28 5750
2.66 6695
2.98 7510
3.35 8436
3.65 9205
4.23 10664
1.86
1.91
2.10
2.35
2.45
2.80
3.18
3.47
3.72
3.81
4.09
4.69
5.19
5.75
6.19
7.01
2341 3.36
2406 3.45
2650 3.77
2962 4.17
3090 4.33
3530 4.88
4005 5.46
4371 5.88
4688 6.26
4807 6.39
5153 6.77
5912 7.60
6538 8.24
7246 8.97
7806 9.50
8831 10.43
2120
2173
2375
2628
2728
3073
3440
3706
3944
4027
4267
4790
5193
5652
5987
6571
5 DIAMETRAL PITCH STEEL
No.
Teeth
11
12
14
15
16
18
20
25 RPM
50 RPM
45
50
55
60
70
80
100
1583
1723
2241
2491
2754
3275
3793
1.23
1.33
1.73
1.92
2.11
2.50
2.89
25 RPM
100 RPM
1546
1680
2176
2415
2664
3156
3640
2.35
2.54
3.26
3.61
3.97
4.67
5.35
50 RPM
1479
1600
2057
2275
2501
2942
3370
100 RPM
10.38
10.51
11.09
11.76
11.97
12.75
13.59
14.00
14.50
14.62
14.94
200 RPM
300 RPM
4.31
4.64
5.89
6.47
7.07
8.22
9.31
1360 5.99 1258
1462 6.40 1345
1855 8.04 1689
2039 8.79 1847
2227 9.56 2008
2590 11.01 2313
2934 12.36 2597
1-3/4" FACE
600 RPM
9.79
10.33
12.68
13.71
14.76
16.68
18.40
1028
1085
1332
1441
1550
1752
1933
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
900 RPM
REFERENCE PAGE 26.
1200 RPM
1800 RPM
600 RPM
12.41
12.99
15.70
16.86
18.03
20.13
21.98
869
910
1099
1181
1262
1410
1539
14.33
14.91
17.82
19.05
20.27
22.46
24.34
753
783
936
1000
1065
1179
1279
1-3/4" FACE
900 RPM
16.96
17.49
20.60
21.88
REFERENCE PAGE 26.
1200 RPM
1800 RPM
3.95
4.17
5.03
5.95
6.70
2.16
2.29
2.80
3.37
3.85
2723
2885
3534
4246
4852
2487 6.73
2626 7.07
3168 8.32
3749 9.64
4224 10.65
5459 7.44 4689 11.60
5956 8.01 5051 12.29
6612 8.79 5539 13.27
7089 9.31 5870 13.86
8135 10.46 6592 15.16
9153 11.54 7270 16.35
10745 13.08 8241 17.84
25 RPM
50 RPM
2120 8.79 1847 12.69
2227 9.20 1933 13.19
2623 10.66 2238 14.80
3038 12.15 2554 16.44
3356 13.25 2783 17.53
1333 14.88 1042
1385 15.41 1079
1554 17.00 1191
1727
1841
3657
3874
4182
4368
4779
5152
5620
1945
2005
2112
2159
14.27
14.95
15.99
16.56
17.84
18.99
2997
3142
3359
3478
3748
3989
18.52
19.08
20.11
20.55
141⁄ 2° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
600 RPM
2" FACE
900 RPM
2810
3057
3971
4414
4876
5794
6703
7579
2.17
2.35
3.04
3.37
3.71
4.39
5.06
5.69
2730 4.10
2963 4.43
3831 5.67
4247 6.26
4680 6.87
5535 8.06
6373 9.21
7173 10.28
2584
2792
3577
3948
4332
5080
5802
6478
7.41
7.94
10.02
10.98
11.97
13.85
15.61
17.22
2334
2502
3158
3461
3772
4364
4920
5427
10.13
10.79
13.46
14.67
15.90
18.20
20.33
22.23
2128
2266
2827
3081
3339
3824
4271
4670
16.01
16.83
20.48
22.06
23.66
26.56
29.13
31.33
1682
1768
2151
2318
2485
2790
3060
3291
19.86
20.69
24.79
26.52
28.26
31.35
34.04
36.29
1391
1449
1736
1857
1979
2196
2384
2541
22.57
23.37
27.70
29.50
31.30
3600 RPM
H.P. Torque
REFERENCE PAGE 27.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
1.11
1.21
1.58
1.75
1.93
2.30
2.66
3.01
3600 RPM
H.P. Torque
594
613
721
766
1.13
1.20
1.49
1.80
2.08
2859
3034
3752
4548
5242
H.P. Torque
1090 12.06 844
1104
1165
1235
1257
1339
1427
1471
1523
1536
1569
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
4 DIAMETRAL PITCH STEEL
11
12
14
15
16
18
20
22
1539
1567
1678
1811
1858
2025
2199
2305
2411
2442
2528
2724
2849
3006
H.P. Torque H.P. Torque
2.36 5947 4.33
2.60 6543 4.73
2.90 7321 5.25
3.14 7910 5.62
3.65 9213 6.45
4.17 10514 7.26
5.03 12671 8.52
No.
Teeth
7.32
7.46
7.99
8.62
8.85
9.64
10.47
10.97
11.48
11.62
12.03
12.96
13.56
14.31
141⁄ 2° PRESSURE ANGLE
5 DIAMETRAL PITCH CAST IRON
24
25
30
35
40
1783
1821
1967
2144
2211
2441
2683
2842
2993
3040
3175
3473
3680
3924
4083
4347
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.63
.68
.89
.99
1.09
1.30
1.50
No.
Teeth
5.66
5.78
6.24
6.80
7.02
7.75
8.52
9.02
9.50
9.65
10.08
11.02
11.68
12.45
12.96
13.79
3600 RPM
3600 RPM
H.P.
Torque
1185 26.14 915
1228 26.85 940
1455
1550
1644
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
56
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
4 DIAMETRAL PITCH CAST IRON
No.
Teeth
24
28
30
32
36
40
42
44
48
54
56
60
64
72
80
84
88
96
25 RPM
50 RPM
100 RPM
11
12
14
15
16
18
20
21
200 RPM
5042
6129
6599
7211
8187
9177
9588
10181
10999
12530
12933
13727
14763
16305
18101
18838
19561
20970
3.77
4.54
4.87
5.30
5.96
6.63
6.90
7.29
7.82
8.81
9.06
9.55
10.20
11.11
12.18
12.60
13.00
13.78
4750
5723
6135
6675
7514
8354
8694
9195
9858
11104
11419
12034
12852
14005
15350
15877
16387
17365
6.75
8.02
8.53
9.22
10.24
11.24
11.63
12.22
12.95
14.35
14.68
15.32
16.20
17.33
18.68
19.17
19.63
20.50
4257
5053
5378
5811
6454
7085
7328
7703
8163
9045
9253
9652
10209
10923
11772
12079
12372
12922
24
30
36
42
48
54
60
72
84
96
108
600 RPM
25 RPM
50 RPM
11.19
12.99
13.69
14.65
15.98
17.24
17.69
18.46
19.28
20.94
21.29
21.94
22.95
24.07
25.48
25.93
26.35
27.13
3525
4094
4314
4616
5034
5433
5575
5816
6074
6598
6708
6915
7233
7585
8029
8170
8304
8548
14.32
16.38
17.14
18.22
19.64
20.97
21.42
22.24
23.02
24.72
25.04
25.65
26.66
27.65
3008
3441
3601
3829
4126
4406
4499
4672
4837
5193
5261
5388
5601
5810
19.88
22.16
22.92
24.11
25.49
26.77
27.12
27.97
28.58
2" FACE
900 RPM
REFERENCE PAGE 27.
1200 RPM
1800 RPM
100 RPM
200 RPM
300 RPM
3" FACE
7421 5.67 7146 10.56
8067 6.14 7743 11.37
10462 7.92 9979 14.49
11618 8.76 11046 15.96
12825 9.64 12156 17.47
15214 11.37 14333 20.38
17570 13.05 16454 23.16
18795 13.92 17549 24.59
6652
7167
9134
10056
11008
12845
14599
15495
25 RPM
50 RPM
100 RPM
18.55
19.80
24.79
27.06
29.38
33.75
37.80
39.84
5846
6239
7812
8528
9259
10637
11913
12556
24.82
26.30
32.48
35.24
38.03
43.20
47.89
50.24
5213
5524
6824
7403
7989
9076
10062
10554
600 RPM
37.47
39.14
47.09
50.49
53.89
60.00
65.33
67.96
3936
4111
4947
5304
5661
6303
6863
7139
141⁄ 2° PRESSURE ANGLE
200 RPM
300 RPM
900 RPM
1200 RPM
1800 RPM
600 RPM
45.15
46.74
55.40
59.01
62.60
68.93
13175
17164
21199
24721
28241
32043
34965
41223
47293
52300
57968
9.67
12.40
15.07
17.32
19.50
21.83
23.52
27.08
30.40
32.96
35.87
12195
15626
18998
21828
24586
27523
29651
34136
38322
41545
45212
16.84
21.03
24.96
28.06
30.99
34.06
36.08
40.30
44.08
46.71
49.81
10617
13251
15732
17687
19530
21466
22740
25402
27782
29437
31395
26.76
32.25
37.15
40.69
43.91
47.30
49.22
53.32
56.87
59.02
61.84
8433
10162
11707
12822
13838
14906
15509
16803
17923
18597
19486
33.30
39.23
44.37
47.87
51.00
54.35
3600 RPM
H.P. Torque
3162 50.30 2642
3273 51.78 2719
3880
4132
4383
4827
3" FACE
900 RPM
REFERENCE PAGE 27.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
5.23
6.81
8.41
9.81
11.20
12.71
13.87
16.35
18.76
20.75
22.99
H.P. Torque
REFERENCE PAGE 27.
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
2.94
3.20
4.15
4.61
5.09
6.03
6.97
7.46
3600 RPM
2089 22.84 1600
2328
2408
2534
2677
2812
2849
2938
3002
141⁄ 2° PRESSURE ANGLE
3 DIAMETRAL PITCH CAST IRON
No.
Teeth
300 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
2.00
2.43
2.62
2.86
3.25
3.64
3.80
4.04
4.36
4.97
5.13
5.44
5.86
6.47
7.18
7.47
7.76
8.32
3 DIAMETRAL PITCH STEEL
No.
Teeth
141⁄ 2° PRESSURE ANGLE
3600 RPM
H.P. Torque
6995 44.05 4627
8241 50.07 5259
9322 55.08 5786
10056
10715
11417
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
P-1930-BG
04/10
Boston Gear 800-825-6544
57
A
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
20 DIAMETRAL PITCH STEEL
No.
Teeth
A
12
14
15
16
18
20
24
25
30
35
40
45
50
60
70
25 RPM
50 RPM
20° PRESSURE ANGLE
100 RPM
80
84
90
100
120
140
160
180
200
900 RPM
REFERENCE PAGE 42.
1200 RPM
1800 RPM
3600 RPM
H.P. Torque
1.08
1.32
1.42
1.49
1.64
1.78
2.00
2.04
2.28
2.55
2.73
36.5
48.0
53.8
58.6
68.6
79.2
99.5
105
132
165
194
224
248
306
365
.03
.04
.04
.05
.05
.06
.08
.08
.10
.13
.15
.17
.19
.24
.28
36.3
47.7
53.3
58.1
67.9
78.4
98.3
103
130
162
190
219
242
296
352
.06
.07
.08
.09
.11
.12
.15
.16
.20
.25
.29
.33
.37
.44
.52
35.8
46.9
52.5
57.1
66.7
76.8
95.8
101
126
156
182
209
230
279
329
25 RPM
50 RPM
100 RPM
.11
.14
.16
.18
.20
.23
.29
.30
.38
.46
.53
.61
.66
.79
.92
34.9 .16
45.6 .21
50.9 .23
55.2 .25
64.2 .29
73.7 .34
91.3 .41
95.6 .43
119
.53
145
.65
168
.75
192
.84
210
.92
250 1.08
291 1.24
34.1
44.3
49.3
53.5
62.0
70.8
87.1
91.1
112
136
157
177
192
227
260
.30
.39
.43
.46
.53
.60
.73
.76
.92
1.09
1.24
1.38
1.47
1.68
1.88
31.8
40.9
45.3
48.8
56.1
63.5
76.7
79.9
96.4
115
130
145
154
177
198
20° PRESSURE ANGLE
200 RPM
300 RPM
.42
.54
.60
.64
.73
.82
.98
1.02
1.21
1.42
1.58
1.74
1.84
2.07
2.28
29.7
37.9
41.9
44.9
51.2
57.5
68.5
71.1
84.5
99.4
111
122
129
145
160
.53
.67
.74
.79
.90
1.00
1.18
1.22
1.43
1.67
1.84
2.01
2.10
2.34
2.55
28.0
35.4
38.9
41.6
47.1
52.6
61.9
64.1
75.2
87.5
96.6
105
111
123
134
1/2" FACE
600 RPM
900 RPM
.71
.89
.97
1.04
1.16
1.28
1.48
1.53
1.76
2.02
2.20
2.37
2.46
2.69
25.0
31.2
34.1
36.3
40.6
44.9
51.9
53.5
61.6
70.6
77.0
83.0
86.1
94.0
256
269
287
317
387
447
520
579
637
.20
.20
.22
.24
.29
.33
.38
.42
.46
246
257
274
302
365
418
481
532
580
.36
.38
.40
.44
.52
.59
.66
.72
.78
228
237
252
275
327
369
419
457
492
25 RPM
50 RPM
.63
.65
.69
.74
.86
.95
1.06
1.13
1.20
198
206
216
233
271
299
333
356
377
.84
.86
.90
.96
1.10
1.20
1.31
1.39
1.46
176
181
189
202
231
251
276
292
306
1.24
1.27
1.32
1.38
1.53
1.62
1.74
1.80
1.86
131
134
138
145
161
170
183
189
195
20° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
1.49
1.51
1.55
1.61
1.76
1.83
104
106
109
113
123
128
1.65
1.67
1.71
1.76
1800 RPM
900 RPM
3600 RPM
H.P.
Torque
86.5
87.8
89.7
92.4
3/4" FACE
600 RPM
18.9
23.0
24.9
26.2
28.7
31.2
34.9
35.8
40.0
44.7
47.8
REFERENCE PAGE 42.
1200 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
16 DIAMETRAL PITCH STEEL
12
14
15
16
18
20
24
28
30
32
36
40
48
56
60
64
72
80
1/2" FACE
600 RPM
.01
.02
.02
.02
.03
.03
.04
.04
.05
.07
.08
.09
.10
.12
.14
.10
.11
.11
.13
.15
.18
.21
.23
.25
No.
Teeth
300 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
20 DIAMETRAL PITCH CAST IRON
No.
Teeth
200 RPM
REFERENCE PAGE 43.
1200 RPM
1800 RPM
3600 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
H.P.
Torque
.03
.04
.05
.05
.06
.07
.09
.11
.12
.13
.16
.18
.22
.26
.28
.31
.35
.39
2.26
2.73
2.93
3.07
3.35
3.62
4.02
4.40
4.55
4.79
5.09
5.37
39.5
47.7
51.3
53.8
58.6
63.3
70.4
77.0
79.7
83.9
89.1
94.1
85.5
112
126
136
160
185
233
283
308
340
395
452
556
665
711
779
872
991
.07
.09
.10
.11
.13
.14
.18
.22
.24
.26
.31
.35
.43
.51
.54
.59
.66
.75
84.7
111
124
135
158
183
229
278
302
333
385
440
539
642
684
748
833
943
.13
.17
.19
.21
.25
.28
.35
.43
.46
.51
.58
.66
.81
.95
1.01
1.10
1.21
1.36
83.4
109
122
133
155
178
222
268
291
320
368
418
508
599
636
692
764
858
.26
.33
.37
.40
.47
.54
.66
.79
.86
.94
1.07
1.21
1.44
1.68
1.77
1.91
2.08
2.31
80.9
105
117
127
148
169
209
250
270
296
338
381
455
529
557
602
656
728
.37
.48
.54
.58
.67
.77
.94
1.12
1.20
1.31
1.49
1.66
1.96
2.25
2.36
2.54
2.74
3.01
78.4
102
113
122
142
161
198
235
253
275
312
349
412
474
496
533
575
632
.69
.88
.97
1.04
1.19
1.35
1.62
1.88
2.01
2.17
2.42
2.67
3.06
3.43
3.55
3.78
4.00
4.31
72.0
92.2
102
110
125
141
170
198
211
228
254
280
322
360
373
397
420
653
.95
1.20
1.33
1.42
1.61
1.80
2.12
2.44
2.59
2.78
3.06
3.34
3.76
4.15
4.27
4.51
4.72
5.04
66.5
84.4
92.8
99.4
113
126
149
171
181
195
215
234
264
291
299
316
330
353
1.18
1.48
1.62
1.73
1.94
2.16
2.52
2.87
3.02
3.23
3.53
3.82
4.25
4.64
4.75
5.00
61.8
77.7
85.2
90.8
102
113
132
151
159
170
186
201
223
244
250
263
1.55
1.92
2.09
2.21
2.46
2.70
3.10
3.47
3.63
3.86
4.17
4.47
4.88
54.2
67.2
73.1
77.5
86.2
94.7
108
122
127
135
146
156
171
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
58
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
16 DIAMETRAL PITCH CAST IRON
No.
Teeth
96
128
144
160
192
25 RPM
50 RPM
100 RPM
12
13
14
15
16
18
20
21
24
28
30
36
42
48
54
200 RPM
300 RPM
3/4" FACE
600 RPM
REFERENCE PAGE 43.
900 RPM
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.28
.38
.42
.47
.56
707 .53 666
949 .70 879
1057 .77 970
1195 .86 1088
1406 1.00 1260
.95 597
1.21 765
1.32 833
1.46 923
1.66 1044
12 DIAMETRAL PITCH STEEL
No.
Teeth
20° PRESSURE ANGLE
25 RPM
50 RPM
1.57
1.93
2.06
2.25
2.46
494
608
650
707
777
2.01
2.40
2.54
2.73
2.94
421
504
533
574
618
2.79
3.17
3.29
3.49
3.65
293
333
346
366
384
3.20
3.56
20° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
224
249
1" FACE
600 RPM
900 RPM
REFERENCE PAGE 43.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.08
.09
.11
.12
.13
.15
.17
.19
.22
.26
.29
.37
.44
.52
.60
202 .16 200
233 .18 230
265 .21 262
297 .23 293
323 .25 319
379 .30 373
437 .34 429
468 .36 459
548 .43 537
667 .52 651
720 .56 707
928 .71 899
1112 .85 1073
1304 .99 1252
1505 1.14 1437
.31
196
.36
225
.41
256
.45
285
.49
310
.57
361
.66
415
.70
443
.82
515
.99
621
1.07
673
1.34
847
1.59 1001
1.84 1159
2.09 1319
12 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
.60 188 .86
.68 215 .98
.77 244 1.11
.86 271 1.23
.93 294 1.33
1.08 340 1.53
1.23 389 1.74
1.31 413 1.84
1.51 477 2.11
1.80 568 2.49
1.94 612 2.68
2.41 759 3.27
2.81 884 3.77
3.20 1009 4.25
3.60 1133 4.73
181
206
233
259
279
322
365
388
444
524
562
688
792
893
993
1.54
1.75
1.96
2.16
2.31
2.63
2.95
3.11
3.50
4.04
4.29
5.11
5.73
6.33
6.90
162
183
206
227
243
276
310
327
368
425
451
537
602
665
724
20° PRESSURE ANGLE
200 RPM
300 RPM
2.09
2.36
2.63
2.88
3.07
3.46
3.84
4.03
4.48
5.10
5.37
6.28
6.94
7.56
8.14
147
165
184
202
215
242
269
282
314
357
376
440
486
529
570
2.55
2.86
3.18
3.46
3.68
4.10
4.52
4.73
5.21
5.86
6.15
7.09
7.76
8.37
134
150
167
182
193
215
238
249
274
308
323
373
407
440
1" FACE
600 RPM
900 RPM
3.27
3.63
4.00
4.34
4.58
5.04
5.50
5.73
6.22
6.89
7.19
8.15
114
127
140
152
160
177
193
201
218
241
252
285
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
60
66
72
84
96
108
120
132
144
168
192
216
.40
.45
.48
.58
.65
.75
.82
.89
.97
1.13
1.27
1.41
.75
.84
.91
1.07
1.21
1.37
1.49
1.61
1.73
2.00
2.22
2.42
949
1064
1150
1354
1519
1725
1882
2034
2181
2526
2794
3045
1.37
1.53
1.64
1.90
2.10
2.35
2.53
2.70
2.87
3.25
3.52
3.77
864
961
1031
1196
1322
1482
1596
1704
1806
2047
2219
2375
2.32
2.56
2.71
3.07
3.33
3.67
3.88
4.08
4.26
4.71
4.99
5.23
733
805
853
969
1050
1156
1224
1287
1344
1484
1573
1649
3.03
3.30
3.47
3.88
4.15
4.51
4.73
4.92
5.09
5.54
5.80
6.01
636
693
728
814
871
947
993
1033
1070
1164
1218
1263
4.34
4.65
4.81
5.24
5.49
5.85
6.03
6.19
6.32
456
488
506
551
576
615
634
650
664
5.07
5.38
5.53
3600 RPM
H.P. Torque
4.53
4.97
5.42
5.80
6.05
6.55
7.02
7.26
7.72
79.4
87.1
94.8
102.0
106.0
115.0
123.0
127.0
135.0
REFERENCE PAGE 44.
1200 RPM
No.
Teeth
998
1125
1221
1450
1641
1879
2068
2252
2433
2861
3209
3545
3600 RPM
H.P. Torque
3600 RPM
H.P.
Torque
355
377
387
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
P-1930-BG
04/10
Boston Gear 800-825-6544
59
A
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
10 DIAMETRAL PITCH STEEL
No.
Teeth
A
12
14
15
16
18
20
24
25
28
30
35
40
45
48
50
25 RPM
50 RPM
20° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
1-1/4" FACE
600 RPM
900 RPM
REFERENCE PAGE 44.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.14
.19
.21
.23
.27
.31
.39
.41
.47
.52
.64
.75
.87
.92
.96
363
477
533
580
679
784
983
1032
1195
1300
1615
1896
2190
2328
2420
.28
.37
.42
.45
.53
.61
.76
.80
.92
1.00
1.24
1.44
1.66
1.76
1.83
358
469
525
571
667
768
958
1005
1161
1260
1558
1820
2092
2218
2301
.55
.72
.81
.88
1.02
1.17
1.45
1.52
1.74
1.88
2.31
2.67
3.05
3.21
3.32
349
456
509
552
642
737
913
956
1097
1187
1454
1685
1920
2026
2095
10 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
1.06
1.37
1.52
1.64
1.90
2.16
2.65
2.76
3.14
3.38
4.08
4.65
5.23
5.48
5.64
333
431
479
518
599
682
834
870
990
1064
1284
1467
1649
1727
1777
1.51
1.95
2.16
2.32
2.67
3.02
3.65
3.80
4.29
4.59
5.47
6.18
6.88
7.16
7.34
318 2.66 280 3.57
409 3.37 354 4.46
453 3.70 389 4.87
488 3.96 416 5.18
561 4.48 471 5.79
635 5.00 526 6.41
767 5.89 619 7.41
799 6.10 641 7.64
901 6.76 710 8.37
964 7.16 752 8.80
1150 8.33 875 10.08
1299 9.20 966 10.99
1445 10.04 1054 11.85
1504 10.33 1085 12.12
1542 10.52 1105 12.29
20° PRESSURE ANGLE
200 RPM
300 RPM
250 4.30 226 5.40 189 7.27
312 5.31 279 6.58 230 8.63
341 5.78 303 7.10 249 9.22
363 6.12 321 7.47 262 9.60
406 6.79 356 8.19 287 10.33
449 7.45 391 8.90 311 11.04
519 8.50 447 9.98 349
535 8.74 459 10.21 358
586 9.50 499 10.99 385
616 9.94 522 11.42 400
706 11.27 592
770 12.17 639
830
849
861
1-1/4" FACE
600 RPM
900 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
55
60
70
80
90
100
120
140
160
200
.65
.71
.84
.98
1.09
1.20
1.45
1.66
1.91
2.30
1.23
1.33
1.57
1.81
2.00
2.18
2.59
2.93
3.32
3.90
1550
1675
1974
2279
2517
2746
3271
3688
4191
4920
2.22
2.38
2.77
3.15
3.43
3.70
4.30
4.74
5.28
5.99
1400
1501
1743
1984
2162
2329
2709
2989
3329
3773
8 DIAMETRAL PITCH STEEL
No.
Teeth
12
14
15
16
18
20
22
24
28
32
36
25 RPM
50 RPM
3.72
3.94
4.48
5.00
5.35
5.67
6.40
6.88
7.49
8.17
1173
1243
1413
1576
1686
1786
2016
2167
2359
2573
4.80
5.05
5.65
6.22
6.58
6.89
7.64
8.09
8.69
1009
1061
1187
1307
1382
1448
1605
1699
1826
6.77
7.01
7.65
8.23
8.54
8.80
9.48
711
737
803
865
897
924
996
20° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
7.84
8.06
678
890
996
1084
1268
1462
1651
1831
2224
2664
3082
.53
.69
.77
.84
.98
1.13
1.27
1.41
1.70
2.03
2.34
667
874
976
1061
1238
1424
1604
1775
2145
2557
2944
1.03
1.34
1.49
1.62
1.88
2.15
2.41
2.65
3.18
3.76
4.29
647
843
939
1018
1183
1354
1518
1672
2003
2367
2703
1.93
2.50
2.77
2.99
3.44
3.91
4.35
4.75
5.61
6.54
7.37
609
787
873
943
1086
1233
1371
1498
1768
2060
2321
2.74
3.51
3.88
4.18
4.77
5.39
5.95
6.46
7.54
8.68
9.68
576
738
816
877
1003
1131
1250
1357
1583
1824
2034
4.71
5.92
6.49
6.92
7.78
8.64
9.41
10.08
11.47
12.92
14.13
495
622
681
727
817
908
989
1059
1204
1358
1484
3600 RPM
H.P. Torque
900 RPM
REFERENCE PAGE 45.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.27
.35
.39
.43
.50
.58
.66
.73
.88
1.06
1.22
127
151
161
168
181
193
549
564
1-1/2" FACE
600 RPM
Torque
REFERENCE PAGE 44.
1200 RPM
No.
Teeth
1638
1778
2114
2462
2742
3016
3650
4177
4814
5802
3600 RPM
H.P.
6.19 434
7.68 537
8.35 585
8.85 620
9.84 689
10.82 758
11.67 817
12.39 868
13.88 972
15.44 1081
16.68 1168
7.35
9.01
9.76
10.30
11.35
12.38
13.27
14.00
15.51
17.10
386
473
513
541
596
650
698
735
815
898
9.03
10.91
11.73
12.30
13.40
14.47
15.36
16.08
316
382
411
431
469
507
538
563
3600 RPM
H.P.
Torque
11.72
13.81
14.70
205
242
257
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
60
Boston Gear 800-825-6544
P-1930-BG
04/10
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
8 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
20° PRESSURE ANGLE
200 RPM
300 RPM
1-1/2" FACE
600 RPM
900 RPM
REFERENCE PAGE 45.
1200 RPM
1800 RPM
No.
Teeth
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
40
44
48
56
60
64
72
80
88
96
112
120
128
.84
.95
1.03
1.22
1.30
1.42
1.59
1.79
1.96
2.11
2.49
2.64
2.79
2111
2384
2587
3080
3283
3588
3997
4525
4929
5325
6266
6651
7028
1.59
1.79
1.93
2.28
2.42
2.64
2.91
3.27
3.53
3.79
4.39
4.63
4.85
2007
2256
2437
2876
3052
3322
3669
4119
4451
4772
5533
5830
6118
2.90
3.23
3.47
4.03
4.25
4.59
5.00
5.54
5.92
6.27
7.11
7.42
7.71
1928 4.92 1550 6.40
2038 5.42 1707 6.99
2184 5.74 1809 7.35
2539 6.53 2057 8.23
2676 6.81 2146 8.53
2892 7.29 2297 9.07
3151 7.80 2458 9.59
3493 8.50 2679 10.34
3729 8.93 2816 10.76
3952 9.33 2941 11.15
4483 10.31 3250 12.13
4677 10.63 3351 12.43
4860 10.93 3444 12.69
6 DIAMETRAL PITCH STEEL
No.
Teeth
12
14
15
16
18
21
24
27
30
25 RPM
50 RPM
1345
1469
1543
1729
1792
1905
2014
2173
2262
2341
2549
2610
2667
9.18
9.86
10.20
11.14
11.40
12.00
12.44
13.20
13.54
13.83
964 10.72 751
1035 11.41 799
1072 11.72 821
1170
1198
1260
1307
1386
1422
1453
20° PRESSURE ANGLE
100 RPM
200 RPM
300 RPM
2" FACE
600 RPM
900 RPM
REFERENCE PAGE 45 & 46.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
.63
.83
.93
1.01
1.18
1.46
1.70
1.98
2.25
1559
2097
2345
2551
2981
3671
4294
4986
5660
1.24
1.62
1.81
1.97
2.29
2.81
3.27
3.78
4.27
1565
2046
2284
2480
2889
3541
4122
4763
5381
2.38
3.10
3.45
3.73
4.32
5.25
6.05
6.94
7.77
1502 4.41 1391 6.16
1951 5.67 1786 7.84
2171 6.27 1977 8.64
2351 6.76 2129 9.26
2722 7.74 2440 10.52
3306 9.26 2919 12.44
3815 10.54 3322 14.00
4372 11.92 3755 15.66
4899 13.18 4155 17.17
6 DIAMETRAL PITCH CAST IRON
25 RPM
50 RPM
100 RPM
1294
1647
1814
1945
2210
2613
2941
3241
3607
10.20
12.70
13.85
14.71
16.41
18.93
20.83
22.85
24.60
1072
1334
1455
1545
1724
1988
2188
2400
2584
20° PRESSURE ANGLE
200 RPM
300 RPM
13.06
16.02
17.35
18.30
20.18
22.91
24.88
26.98
28.75
915
1122
1215
1282
1413
1605
1743
1889
2013
15.19
18.42
19.85
20.85
22.79
25.61
27.56
798
967
1043
1095
1197
1345
1448
2" FACE
600 RPM
900 RPM
18.14
21.67
23.20
24.21
26.18
REFERENCE PAGE 46.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
33
36
42
48
54
60
66
72
84
96
108
120
1.53
1.71
2.04
2.38
2.74
3.01
3.38
3.65
4.30
4.82
5.47
5.97
2.89
3.23
3.81
4.41
5.02
5.48
6.10
6.54
7.59
8.39
9.40
10.13
3641
4066
4807
5563
6333
6910
7691
8245
9566
10579
11583
12770
5.22
5.78
6.73
7.68
8.63
9.30
10.22
10.83
12.30
13.33
14.67
15.54
3288
3644
4244
4843
5440
5860
6443
6827
7752
8404
9245
9793
8.74
9.58
10.91
12.21
13.46
14.26
15.44
16.12
17.83
18.90
20.37
21.20
2755
3018
3439
3847
4243
4494
4864
5080
5620
5955
6420
6680
11.28
12.26
13.76
15.19
16.55
17.35
18.60
19.26
20.98
21.95
23.41
2370
2575
2891
3191
3477
3645
3907
4045
4407
4611
4917
15.90
17.02
18.62
20.09
21.48
22.14
23.39
23.90
3600 RPM
H.P. Torque
635
759
812
848
917
No.
Teeth
3847
4316
5148
6009
6899
7591
8515
9200
10835
12152
13800
15059
3600 RPM
H.P. Torque
3600 RPM
H.P. Torque
1670 18.42 1290
1788 19.56 1370
1955
2111
2256
2326
2457
2511
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
P-1930-BG
04/10
Boston Gear 800-825-6544
61
A
Spur Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
5 DIAMETRAL PITCH STEEL
No.
Teeth
A
12
14
15
16
18
20
25 RPM
50 RPM
20° PRESSURE ANGLE
100 RPM
2865
3756
4198
4565
5332
6141
2.22
2.89
3.23
3.50
4.08
4.68
2794
3647
4069
4416
5138
5894
4.22
5.47
6.08
6.58
7.60
8.66
2662
3449
3833
4146
4789
5456
5 DIAMETRAL PITCH CAST IRON
24
25
28
30
35
40
45
50
60
70
80
100
110
120
140
160
180
300 RPM
600 RPM
900 RPM
REFERENCE PAGE 46.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
1.14
1.49
1.67
1.81
2.12
2.44
No.
Teeth
200 RPM
2-1/2" FACE
25 RPM
50 RPM
100 RPM
7.71
9.87
10.90
11.72
13.38
15.07
2431
3110
3435
3693
4216
4750
10.65
13.48
14.81
15.85
17.92
20.02
2237
2832
3112
3329
3766
4205
17.19
21.25
23.11
24.47
27.15
29.79
1805
2233
2427
2570
2852
3129
20° PRESSURE ANGLE
200 RPM
300 RPM
21.61
26.31
28.41
29.89
32.77
35.58
1513
1843
1990
2093
2295
2492
24.80
29.87
32.09
33.61
36.56
39.41
1302 29.09 1019
1569 34.53 1209
1686 36.87 1291
1765
1920
2070
2-1/2" FACE
600 RPM
900 RPM
REFERENCE PAGE 46.
1200 RPM
1800 RPM
H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque
1.82
1.91
2.21
2.40
2.97
3.47
3.98
4.38
5.32
6.27
7.23
8.71
9.68
10.38
11.70
13.30
14.49
4599
4826
5571
6050
7477
8737
10040
11046
13399
15794
18229
21969
24409
26168
29508
33526
36534
3.48
3.64
4.18
4.52
5.54
6.42
7.31
7.98
9.53
11.06
12.59
14.78
16.22
17.19
18.97
21.13
22.61
4381
4588
5267
5700
6982
8087
9216
10056
12008
13945
15869
18630
20449
21669
23910
26631
28495
6.35
6.63
7.54
8.10
9.78
11.17
12.56
13.53
15.78
17.93
20.00
22.67
24.50
25.58
27.50
29.94
31.40
4002
4177
4750
5108
6164
7040
7916
8528
9944
11300
12605
14288
15439
16125
17334
18870
19787
10.82
11.24
12.60
13.42
15.85
17.75
19.59
20.75
23.48
26.00
28.34
30.92
32.88
33.85
35.49
37.83
38.97
3411
3542
3970
4230
4995
5593
6174
6540
7400
8192
8932
9745
10362
10666
11182
11921
12281
14.15
14.64
16.23
17.18
19.98
22.08
24.09
25.25
28.05
30.58
32.92
2972
3075
3410
3609
4199
4639
5060
5304
5892
6425
6916
20.41
20.97
22.81
23.86
27.04
29.21
31.26
32.22
34.81
2144
2203
2396
2506
2840
3068
3284
3384
3657
23.95
24.51
26.37
27.41
3600 RPM
H.P. Torque
3600 RPM
H.P. Torque
1677
1716
1847
1920
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute.
They should be used for interpolation purposes only.
*Torque Ratings (Lb. Ins.).
Gear Gauge Set
14-1/2° and 20° Pressure Angles
This handy, steel gear gauge set consists of 16 leaves — 24 gauges — to
measure both 14-1/2° and 20° Pressure Angle tooth form, in diametral pitch
sizes 64, 48, 32, 24, 20, 16, 12, 10, 8, 6, 5 and 4. Pitch sizes 8, 6, 5 and 4 both
14-1/2° and 20° are cut on individual leaves. Pitch sizes 64 through 10 inclusive,
have both 14-1/2° and 20° Pressure Angles on a single leaf.
SOLD ONLY AS A COMPLETE SET
ORDER BY CATALOG NUMBER OR ITEM CODE
62
Boston Gear 800-825-6544
Catalog Number
Item Code
Gear Gauge
06000
P-1930-BG
04/10
Helical Gears
Section Contents
B
CATALOG NUMBER / DIMENSIONS................................................................................................. 64-65
SELECTION PROCEDURE ....................................................................................................................... 66
HORSEPOWER & TORQUE RATINGS............................................................................................... 67-68
STOCK ALTERED / CUSTOM HELICAL GEARS .................................................................................. 3-5
HELICAL GEAR ENGINEERING INFORMATION .......................................................................... 304-306
P-1930-BG
04/10
Boston Gear 800-825-6544
63
Helical Gears
24 through 10 Transverse Diametral Pitch (Steel – Hardened)
14-1/2° Normal Pressure Angle – 45° Helix Angle
These gears are hardened all over, except as noted. Teeth on all steel gears are
polished.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Keyway
Style
See
Page
315
24
B
FACE
KEYWAY
TRANSVERSE DIAMETRAL PITCH
8
.333
.1875
*
10
.417
.250
12
.500
**
15
.625
.375
18
.750
20
.833
.500
24
1.000
30
1.250
1/8 x 1/16
36
1.500
48
2.000
.625
60
2.500
72
3.000
A
20
PITCH
DIA.
BORE
TRANSVERSE DIAMETRAL PITCH
8
.400
.250
10
.500
.3125
**
12
.600
.375
15
.750
.4375
20
1.000
.500
1/8 x 1/16
25
1.250
.625
30
1.500
40
2.000
.750
3/16 x 3/32
50
2.500
60
3.000
A
16
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
Alterations — 314
Horsepower Ratings — 67
Lubrication — 314
Materials — 315
Selection Procedure — 66
NOTE: Normal Diametral Pitch is equal to the
Transverse Diametral Pitch divided by the cosine
of the Helix Angle.
Face: 8-15 Teeth = .375"
18-72 Teeth = .250"
H2408R 18268 H2408L
H2410R 18272 H2410L
H2412R 18276 H2412L
H2415R 18280 H2415L
H2418R 18284 H2418L
H2420R 18288 H2420L
H2424R 18292 H2424L
H2430R 18296 H2430L
H2436R† 18300 H2436L†
H2448R† 18304 H2448L†
H2460R† 18308 H2460L†
H2472R† 18312 H2472L†
18270
18274
18278
18282
18286
18290
18294
18298
18302
18306
18310
18314
Face: 8-15 Teeth = .563"
18-72 Teeth = .375"
H2008R 18228 H2008L
H2010R 18232 H2010L
H2012R 18236 H2012L
H2015R 18240 H2015L
H2020R 18244 H2020L
H2025R 18248 H2025L
H2030R† 18252 H2030L†
H2040R† 18256 H2040L†
H2050R† 18260 H2050L†
H2060R† 18264 H2060L†
18230
18234
18238
18242
18246
18250
18254
18258
18262
18266
A
H1612R
H1616R
H1620R
H1624R†
H1632R†
H1640R†
H1648R†
18200
18204
18208
18212
18216
18220
18224
H1612L
H1616L
H1620L
H1624L†
H1632L†
H1640L†
H1648L†
18202
18206
18210
18214
18218
18222
18226
H1212L
H1215L
H1218L†
H1224L†
H1230L†
H1236L†
18168
18172
18176
18180
18184
18188
H1008L
H1010L
H1012L
H1015L†
H1020L†
H1025L†
H1030L†
H1040L†
18128
18132
18136
18140
18144
18150
18152
18156
Face = .750"
TRANSVERSE DIAMETRAL PITCH
12
1.000
15
1.250
18
1.500
.625
1/8 x 1/16
24
2.000
30
36
LEFT HAND
Catalog
Item
Number Code
Face = .500"
TRANSVERSE DIAMETRAL PITCH
12
.750
.375
1/16 x 1/32
16
1.000
20
1.250
24
1.500
.500
1/8 x 1/16
32
2.000
40
2.500
48
3.000
12
REFERENCE PAGES
RIGHT HAND
Catalog
Item
Number Code
A
2.500
3.000
10
TRANSVERSE DIAMETRAL PITCH
8
.800
.375
1/16 x 1/32
10
1.000
.500
1/8 x 1/16
12
1.200
.625
15
1.500
20
2.000
25
2.500
.750
3/16 x 3/32
30
3.000
40
4.000
H1212R
H1215R
H1218R†
H1224R†
H1230R†
H1236R†
18170
18174
18178
18182
18186
18190
Face = .875"
A
H1008R
H1010R
H1012R
H1015R†
H1020R†
H1025R†
H1030R†
H1040R†
18130
18134
18138
18142
18146
18148
18154
18158
*1/16" wide x .04" deep slot cut on end of gear for drive pin, not key.
**3/32" wide x .06" deep slot cut on end of gear for drive pin, not key.
†Teeth only hardened.
64
Boston Gear 800-825-6544
P-1930-BG
04/10
Helical Gears
8 and 6 Transverse Diametral Pitch (Bronze & Steel – Hardened)
14-1/2° Normal Pressure Angle – 45° Helix Angle
All gears with hubs have setscrew at 90° to keyway. Steel gears have teeth only
hardened, except as noted. Teeth on all steel gears are polished.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Hub
No.
of
Pitch
Teeth Dia. Bore Dia. Proj.
Keyway
Style
RIGHT HAND
See
Page Catalog Item
315 Number Code
LEFT HAND
Catalog Item
Number Code
Face without Hubs = 1.000"
–with Hubs = .750"
TRANSVERSE DIAMETRAL PITCH
Overall Length = Face + Hub Proj.
STEEL–HARDENED
8 1.000 .500 –
–
H808R* 18066 H808L* 18064
1/8 x 1/16
10 1.250 .625 –
–
H810R* 18070 H810L* 18068
12 1.500 .750 –
–
H812R
18074 H812L 18072
16 2.000
A
H816R
18078 H816L 18076
H820R
18082 H820L 18080
20 2.500 .875 –
3/16 x 3/32
–
24 3.000
H824R
18086 H824L 18084
32 4.000
H832R
18090 H832L 18088
8 1.000 .500 .75 .50 1/8 x 1/16
HS808R* 18092 HS808L* 18094
10 1.250 .625 1.00 .50
HS810R* 18096 HS810L* 18098
12 1.500 .750 1.25 .50 3/16 x 3/32
HS812R* 18100 HS812L* 18102
16 2.000
1.62
HS816R 18104 HS816L 18106
20 2.500
A
HS820R 18108 HS820L 18110
24 3.000 1.000 2.00 .50 1/4 x 1/8
HS824R 18112 HS824L 18114
32 4.000
HS832R 18116 HS832L 18118
40 5.000
HS840R 18120 HS840L 18122
48 6.000
2.25
HS848R 18124 HS848L 18126
BRONZE
8 1.000 .500 .75 .50 1/8 x 1/16
HB808R 18356 HB808L 18358
10 1.250 .625 1.00 .50
HB810R 18360 HB810L 18362
12 1.500 .750 1.24 .50 3/16 x 3/32 A
HB812R 18364 HB812L 18366
16 2.000
1.62
HB816R 18368 HB816L 18370
20 2.500
HB820R 18372 HB820L 18374
24 3.000 1.000 2.00 .50 1/4 x 1/8
HB824R 18376 HB824L 18378
32 4.000
HB832R 18380 HB832L 18382
40 5.000
B
HB840R 18384 HB840L 18386
48 6.000
2.25
HB848R 18388 HB848L 18390
Face without Hubs = 1.250"
6
–with Hubs = 1.000"
TRANSVERSE DIAMETRAL PITCH
Overall Length = Face + Hub Proj.
STEEL–HARDENED
8 1.333 .625 –
–
1/8 x 1/16
H608R
18000 H608L 18002
10 1.667 .750 –
–
3/16 x 3/32
H610R
18004 H610L 18006
12 2.000
A
H612R
18010 H612L 18008
15 2.500 1.000 –
H615R
18014 H615L 18012
–
1/4
x
1/8
18 3.000
H618R
18018 H618L 18016
24 4.000
H624R
18022 H624L 18020
8 1.333 .625 1.00 .75 1/8 x 1/16
HS608R 18024 HS608L 18026
9 1.500
1.18
HS609R 18028 HS609L 18030
10 1.667 .750 1.34 .75 3/16 x 3/32
HS610R 18032 HS610L 18034
12 2.000 1.000 1.62 .75 1/4 x 1/8
HS612R 18036 HS612L 18038
15 2.500
2.00
HS615R 18040 HS615L 18042
18 3.000
2.25
A
HS618R 18044 HS618L 18046
20 3.333 1.250
HS620R 18048 HS620L 18050
.75
5/16
x
5/32
24 4.000
HS624R 18052 HS624L 18054
2.50
30 5.000
HS630R 18056 HS630L 18058
36 6.000
HS636R 18060 HS636L 18062
BRONZE
12 2.000 1.000 1.62 .75 1/4 x 1/8
HB612R 18328 HB612L 18330
15 2.500
2.00
HB615R 18332 HB615L 18334
A
18 3.000
2.25
HB618R 18336 HB618L 18338
20 3.333 1.250
HB620R 18340 HB620L 18342
.75
5/16
x
5/32
24 4.000
HB624R 18344 HB624L 18346
2.50
30 5.000
B
HB630R 18348 HB630L 18350
36 6.000
HB636R 18352 HB636L 18354
8
FACE
B
HUB
PROJ.
KEYWAY
PITCH
DIA.
BORE
HUB
DIA.
SETSCREW
OVERALL
LENGTH
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 67, 68
Lubrication — 314
Materials — 315
Selection Procedure — 66
NOTE: Normal Diametral Pitch is equal to the
Transverse Diametral Pitch divided by the cosine
of the Helix Angle.
*Hardened all over.
P-1930-BG
04/10
Boston Gear 800-825-6544
65
Helical Gears
Boston standard stock helical gears are made with a 45° helix angle to transmit
motion and/or power between non-intersecting shafts that are parallel or at 90°
to each other. They are stocked both right and left-handed. For parallel shaft
operation, helical gears having opposite hand helix angles are required, while for
shafts at 90° the same hand helix must be used.
For parallel shaft applications, helical gears provide overlapping tooth contact.
This results in a smoother, quieter operation and higher horsepower capacity
than afforded by spur gears of comparable size.
For 90° shaft applications, the tooth contact area is very small which
considerably limits the load capacity. Horsepower ratings are not tabulated in this
catalog, for 90° applications.
Boston helical gears are top hobbed, resulting in extremely close concentricity
between the pitch diameter and the outside diameter.
B
Selection Procedure
Approximate horsepower and torque ratings for selected
sizes (numbers of teeth) at various operating speeds (RPM)
are given for hardened steel helical gears. The ratings are
based on the beam strength of the gear tooth. These ratings
are for parallel shaft applications under normal operating
conditions, that is: properly mounted and lubricated, carrying
a smooth load for not more than 10 hours per day or a
moderate shock load not more than 15 minutes in two hours
(Service Factor 1.0). Refer to Table 1, below, for other types
of service.
Ratings for gear sizes or speeds not listed may be
interpolated from the values indicated. Pitchline velocities are
limited as reflected by the lack of ratings for larger numbers
of teeth at higher RPM’s in the selection chart. Application in
this area is not recommended.
Horsepower ratings for bronze gears are approximately 33%
of these ratings.
1. Determine service factor.
a. Using Application Classification Chart I, pages 323-324
determine service factor or
b. With knowledge of operating conditions and load
classification, select service factor from Table 1.
2. Determine Design Horsepower.
Design HP = Application Load × Service Factor (Table 1)
3. Select pinion with horsepower capacity equal to (or
greater than) design horsepower determined in Step 2.
Reference Rating Pages 67, 68.
4. Select a driven gear with a catalog rating equal to (or
greater than) the horsepower determined in Step 2.
Ref. Parallel shafts are approximately 98% efficient
90° shafts are approximately 50% efficient
TABLE 1
Service
Factor
.8
1.0
1.25
1.50
1.75
2.0
Operating Conditions
Uniform – not more than 15 minutes in 2 hours.
Moderate Shock – not more than 15 minutes in 2 hours.
Uniform – not more than 10 hours per day.
Moderate Shock – not more than 10 hours per day.
Uniform – more than 10 hours per day.
Heavy Shock – not more than 15 minutes in 2 hours.
Moderate Shock – more than 10 hours per day.
Heavy Shock – not more than 10 hours per day.
Heavy Shock – more than 10 hours per day.
Heavy shock loads and/or severe wear conditions may require the use of
higher service factors. Consultation with factory is recommended in these
applications.
66
Boston Gear 800-825-6544
P-1930-BG
04/10
Helical Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
No.
Teeth
25 RPM
H.P. Torque
50 RPM
H.P. Torque
100 RPM
H.P. Torque
200 RPM
300 RPM
H.P. Torque H.P. Torque
600 RPM
H.P. Torque
900 RPM
H.P. Torque
1200 RPM
1800 RPM
3600 RPM
H.P. Torque H.P. Torque H.P. Torque
24 DIAMETRAL PITCH – 33.94 NORMAL DIAMETRAL PITCH HARDENED STEEL
8
10
12
15
18
20
24
30
36
48
60
72
.01
13.5
.01
13.5 .02
13.4 .04
13.2 .06
13.0 .12
12.5 .17
.01
18.0
.01
17.9 .03
17.8 .06
17.4 .08
17.1 .16
16.3 .22
.01
22.5
.02
22.3 .04
22.1 .07
21.6 .10
21.1 .19
20.0 .27
.01
29.1
.02
28.9 .05
28.5 .09
27.8 .13
27.1 .24
25.2 .34
.01
23.6
.02
23.4 .04
23.1 .07
22.4 .10
21.7 .19
19.9 .26
.01
26.8
.02
26.5 .04
26.1 .08
25.2 .12
24.3 .21
22.2 .29
.01
32.6
.03
32.3 .05
31.6 .10
30.3 .14
29.2 .25
26.1 .34
.02
41.3
.03
40.8 .06
39.7 .12
37.8 .17
36.0 .30
31.6 .40
.02
49.9
.04
49.1 .08
47.6 .14
44.9 .20
42.4 .35
36.4 .46
.03
67.0
.05
65.6 .10
63.0 .19
58.3 .26
54.3 .43
45.0 .55
.03
83.8
.06
81.6 .12
77.6 .22
70.7 .31
64.9 .50
52.0 .62
.04
101
.08
97.7 .15
92.1 .26
82.5 .36
74.8 .56
58.3 .68
20 DIAMETRAL PITCH – 28.28 NORMAL DIAMETRAL PITCH HARDENED STEEL
8
.01
29.2
.02
29.1 .05
28.8 .09
28.4 .13
27.9 .25
26.6 .36
10
.01
37.7
.03
37.5 .06
37.1 .12
36.3 .17
35.6 .32
33.5 .45
12
.02
48.5
.04
48.2 .08
47.5 .15
46.4 .22
45.2 .40
42.2 .56
15
.02
62.7
.05
62.2 .10
61.2 .19
59.3 .27
51.6 .50
52.8 .70
20
.02
57.7
.05
57.1 .09
55.9 .17
53.7 .25
51.6 .44
46.2 .60
25
.03
73.8
.06
72.8 .11
70.9 .21
67.4 .31
64.3 .54
56.4 .72
30
.04
89.1
.07
87.6 .13
85.0 .25
80.0 .36
75.7 .62
65.0 .81
40
.05
120
.09
118
.18 113
.33 104
.46
97.2 .77
80.5 .98
50
.06
151
.12
147
.22 139
.40 127
.55
117
.89
93.4 1.11
60
.07
180
.14
175
.26 165
.47 147
.64
134
.99 104
1.22
16 DIAMETRAL PITCH – 22.63 NORMAL DIAMETRAL PITCH HARDENED STEEL
12
.03
67.2
.05
66.6 .10
65.6 .20
63.6 .29
61.7 .54
56.6 .75
16
.04
93.4
.07
92.4 .14
90.5 .28
86.9 .40
83.5 .71
74.8 .97
20
.05
120
.09
118
.18 115
.35 110
.50
104
.87
91.5 1.16
24
.06
146
.11
144
.22 139
.42 131
.59
124
1.00 107
1.33
32
.08
197
.15
193
.29 185
.54 172
.76
160
1.26 132
1.61
40
.10
249
.19
242
.37 230
.67 210
.92
193
1.47 154
1.84
48
.12
298
.23
289
.43 273
.77 244 1.05
221
1.64 173
2.02
12 DIAMETRAL PITCH – 16.97 NORMAL DIAMETRAL PITCH HARDENED STEEL
12
.07
179
.14
177
.27 173
.53 166
.76
160
1.36 143.2 1.85
15
.09
231
.18
228
.35 222
.67 211
.96
201
1.68 176
2.24
18
.11
281
.22
277
.43 268
.80 253 1.14
239
1.95 205
2.57
24
.15
387
.30
379
.58 364
1.07 337 1.49
313
2.47 260
3.16
30
.19
489
.38
477
.72 453
1.31 413 1.80
379
2.89 304
3.62
36
.23
589
.45
571
.85 538
1.53 482 2.08
437
3.24 341
3.99
10 DIAMETRAL PITCH – 14.14 NORMAL DIAMETRAL PITCH HARDENED STEEL
8
.07
181
.14
179
.28 176
.54 171
.79
165
1.44 151
1.78
10
.10
240
.19
238
.37 233
.71 223 1.02
215
1.83 193
2.49
12
.12
300
.23
296
.46 288
.87 275 1.25
262
2.20 231
2.95
15
.15
387
.30
381
.59 369
1.10 348 1.56
329
2.69 282
3.53
20
.21
533
.41
522
.79 501
1.47 464 2.05
432
3.40 357
4.35
25
.27
680
.53
662
1.00 630
1.82 573 2.50
526
4.01 422
5.03
30
.32
818
.63
793
1.19 747
2.12 669 2.89
606
4.50 473
5.54
40
.44 1097
.84 1053
1.55 975
2.69 849 3.58
751
5.32 559
6.36
8 DIAMETRAL PITCH – 11.31 NORMAL DIAMETRAL PITCH HARDENED STEEL
8
.10
242
.19
239
.37 234
.71 225 1.03
216
1.85 194
2.51
10
.13
321
.25
317
.49 309
.93 293 1.33
280
2.53 245
3.12
12
.16
400
.31
394
.61 382
1.14 360 1.62
340
2.78 292
3.65
16
.22
555
.43
543
.83 521
1.53 483 2.14
447
3.54 372
4.53
20
.28
710
.55
692
1.04 658
1.90 599 2.62
550
4.20 441
5.26
24
.34
862
.66
836
1.25 787
2.24 706 3.04
639
4.75 499
5.84
32
.46 1160
.88 1113
1.64 1031
2.85 897 3.78
794
5.63 591
6.72
40
.58 1454
1.10 1383
2.00 1259
3.39 1068 4.41
927
6.32 664
7.39
48
.69 1137
1.30 1636
2.33 1466
3.85 1214 4.93 1036
6.85 719
7.87
.250-.375" FACE
12.0
15.5
18.9
23.5
18.4
20.4
23.7
28.1
31.9
38.4
43.4
47.8
.22
.28
.34
.42
.33
.36
.41
.48
.54
.64
.71
.77
11.6
14.8
17.9
22.0
17.1
18.8
21.6
25.3
28.4
33.5
37.3
40.5
25.4
31.7
39.5
48.8
41.9
50.2
56.9
68.7
78.0
85.4
.46
.57
.71
.86
.73
.86
.96
1.14
1.27
1.38
24.3
30.1
37.1
45.4
38.3
45.2
50.7
59.9
66.9
72.3
52.3
67.8
81.5
93.3
113
129
141
.93
1.18
1.40
1.58
1.87
2.11
2.28
48.6
62.0
73.4
83.0
98.4
111
120
130
157
180
222
254
279
2.26
2.69
3.05
3.68
4.14
4.50
119
142
160
193
218
237
139
174
206
247
305
352
388
445
2.45
3.03
3.55
4.19
5.06
5.75
6.25
7.04
129
159
186
220
266
302
328
370
176
218
256
318
368
409
471
517
551
3.06
3.74
4.34
5.27
6.01
6.59
7.44
8.07
8.50
160
197
228
277
316
346
391
424
447
.31
.39
.46
.56
.43
.47
.53
.60
.66
.76
.83
.89
10.8 .51
8.9
13.6 .62 10.9
16.2 .72 12.6
19.6 .84 14.8
15.0 .62 10.9
16.3 .67 11.7
18.5 .73 12.8
21.1 .81 14.1
23.3 .86 15.1
26.6 .94 16.5
29.0 1.00 17.5
31.0 1.00 18.2
.375-.563" FACE
.64 22.3 1.00 18.0
.78 27.2 1.20 21.2
.95 33.2 1.44 25.1
1.14 39.8 1.66 29.0
.93 32.7 1.30 22.7
1.08 37.7 1.44 25.2
1.19 41.5 1.54 27.0
1.36 47.7 1.69 29.6
1.49 52.1 1.79 31.4
1.58 55.4 1.86 32.5
.500" FACE
1.20 42.6 1.80 31.1
1.51 52.9 2.10 36.7
1.75 61.3 2.34 41.0
1.94 68.1 2.52 44.2
2.24 78.4 2.78 48.7
2.46 86.2 3.00 51.8
2.62 91.8 3.08 53.9
.750" FACE
2.89 101
4.01 70.2
3.37 118
4.51 79.0
3.75 131
4.86 85.1
4.39 154
5.45 95.5
4.84 170
5.82 102
5.17 181
6.08 106
.875" FACE
3.20 112
4.62 80.9
3.88 136
5.39 94.4
4.46 156
6.01 105
5.16 181
6.69 117
6.05 212
7.51 131
6.72 235
8.09 142
7.18 252
8.44 148
7.89 276
8.97 157
.750" FACE
3.91 137
5.43 95
4.69 164
6.27 110
5.33 187
6.92 121
6.30 221
7.82 137
7.03 246
8.45 148
7.57 265
8.90 156
8.34 292
8.88 311
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line exceed 1500 Feet per Minute and should be used for interpolation purposes only.
*Torque Rating (Lb. Ins.)
P-1930-BG
04/10
Boston Gear 800-825-6544
67
B
Helical Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
No.
Teeth
25 RPM
H.P. Torque
50 RPM
H.P. Torque
100 RPM
H.P. Torque
200 RPM
300 RPM
H.P. Torque H.P. Torque
600 RPM
900 RPM
H.P. Torque H.P. Torque
1200 RPM
1800 RPM
3600 RPM
H.P. Torque H.P. Torque H.P. Torque
8 DIAMETRAL PITCH – 11.31 NORMAL DIAMETRAL PITCH HARDENED STEEL
8
10
12
16
20
24
32
B
.13
323
.25
319
.50 313
.95 300 1.4
288
2.5
258
3.3
234
.17
428
.34
422
.65 412
1.20 391 1.8
373
3.1
327
4.2
291
.21
534
.42
525
.81 509
1.50 480 2.2
453
3.7
389
4.9
341
.29
740
.57
725
1.1
696
2.00 644 2.9
599
4.7
496
6.1
423
.38
947
.73
923
1.4
877
2.50 799 3.5
733
5.6
588
7.0
491
.46 1150
.88 1114
1.7 1050
3.00 941 4.1
852
6.3
665
7.7
545
.61 1547
1.20 1485
2.2 1374
3.80 1196 5.0
1059
7.5
788
9.0
628
8 DIAMETRAL PITCH – 11.31 NORMAL DIAMETRAL PITCH BRONZE
8
.04
97
.08
95.8 .15
93.8 .29
90.0 .41
86.5 .74
77.5 1.00
70.2
10
.05
128
.10
127
.20 123
.37 117
.53
112
.93
98.1 1.25
87.3
12
.06
160
.12
158
.24 153
.46 144
.65
136
1.11 117
1.46 102
16
.09
222
.17
217
.33 209
.61 193
.86
180
1.42 149
1.81 127
20
.11
284
.22
277
.42 263
.76 240 1.05
220
1.68 176
2.10 147
24
.14
345
.27
334
.50 315
.90 282 1.22
256
1.90 199
2.33 163
32
.18
464
.35
445
.65 412
1.14 359 1.51
318
2.75 236
2.69 188
40
.23
582
.44
553
.80 504
1.36 427 1.76
371
2.53 266
2.95 207
48
.28
695
.52
655
.93 587
1.54 486 1.97
414
2.74 288
3.15 220
6 DIAMETRAL PITCH – 8.48 NORMAL DIAMETRAL PITCH HARDENED STEEL
8
.01
572
.45
564
.87 548
1.65 520 2.35
494
4.09 430
5.44 381
9
.26
664
.52
653
1.00 633
1.89 597 2.68
564
4.61 484
6.06 424
10
.30
758
.59
745
1.14 720
2.14 674 3.02
634
5.11 537
6.66 466
12
.37
944
.73
924
1.41 887
2.61 821 3.64
764
6.02 633
7.71 540
15
.48 1217
.94 1185
1.79 1127
3.26 1026 4.48
942
7.19 755
9.00 630
18
.59 1478
1.14 1433
2.14 1350
3.84 1210 5.22 1096
8.14 855 10.00 700
20
.66 1670
1.28 1613
2.40 1511
4.25 1340 5.73 1204
8.79 924 10.69 749
24
.80 2024
1.54 1942
2.85 1798
4.97 1565 6.60 1386
9.82 1031 11.72 821
30
1.01 2546
1.92 2420
3.50 2203
5.93 1868 7.72 1622 11.06 1162 12.92 905
36
1.21 3048
2.28 2872
4.08 2573
6.76 2131 8.65 1818 12.02 1262 13.81 967
6 DIAMETRAL PITCH – 8.48 NORMAL DIAMETRAL PITCH HARDENED STEEL
8
.28
715
.56
705
1.09 685
2.06 650 2.94
617
5.12 537
6.79 476
10
.38
948
.74
931
1.43 899
2.67 842 3.77
792
6.39 672
8.32 583
12
.47 1180
.92 1155
1.76 1109
3.26 1026 4.55
955
7.53 791
9.64 675
15
.60 1521
1.18 1482
2.24 1409
4.07 1282 5.60 1177
8.99 944 11.25 788
18
.73 1848
1.42 1791
2.68 1687
4.80 1512 6.52 1370 10.17 1068 12.50 876
24
1.00 2529
1.93 2428
3.57 2247
6.21 1956 8.24 1732 12.27 1289 14.65 1026
6 DIAMETRAL PITCH – 8.48 NORMAL DIAMETRAL PITCH BRONZE
12
.15
378
.29
370
.56 355
1.04 328 1.46
306
2.41 253
3.08 216
15
.19
487
.38
474
.72 451
1.30 410 1.79
377
2.88 302
3.60 252
18
.23
591
.45
513
.86 540
1.54 484 2.09
439
3.25 342
4.00 280
20
.26
668
.51
645
.96 604
1.70 536 2.29
482
3.52 369
4.28 300
24
.32
810
.62
777
1.14 719
1.99 626 2.64
554
3.93 412
4.69 328
30
.40 1018
.77
968
1.40 881
2.37 747 3.09
649
4.42 465
5.17 362
36
.48 1219
.91 1149
1.63 1029
2.70 852 3.46
727
4.81 505
5.52 387
1.000" FACE
4.1
5.0
5.8
7.0
8.0
8.8
9.9
1.22
1.50
1.73
2.11
2.41
2.64
2.98
3.23
3.40
6.50
7.19
7.84
8.97
10.30
11.30
11.99
12.98
14.11
14.92
8.13
9.80
11.21
12.87
14.12
16.23
3.59
4.12
4.52
4.80
5.19
5.65
5.97
214
262
304
370
421
462
521
5.2
6.3
7.1
8.4
9.3
10.1
11.1
183
219
249
294
328
352
389
7.2
8.4
9.2
10.4
11.1
11.9
12.7
.750" FACE
64.2 1.56 54.8 2.17
78.7 1.88 65.7 2.51
91.1 2.13 74.7 2.77
111
2.52 88.2 3.13
126
2.81 98.4 3.38
138
3.03 106
3.56
156
3.34 117
169
3.55 124
179
1.000" FACE
342
8.09 283
10.70
378
8.84 310
11.47
412
9.54 334
12.17
471 10.71 375
13.29
541 12.04 421
14.48
593 12.98 454
15.25
630 13.65 478
682 14.55 510
741 15.54 544
783
1.250" FACE
427 10.11 354
13.37
515 11.93 418
15.22
589 13.38 469
16.61
676 15.04 527
18.10
742 16.22 568
19.06
852 18.19 637
1.000" FACE
188
4.28 150
5.32
216
4.81 169
5.79
237
5.19 182
6.10
252
5.46 191
273
5.82 204
296
6.22 218
313
127
146
162
182
197
208
221
38.0
43.9
48.4
54.7
59.2
62.3
187
201
213
233
253
267
234
266
291
317
334
93.1
101
107
Ratings are based on strength calculation. Basic static strength rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line exceed 1500 Feet per Minute and should be used for interpolation purposes only.
*Torque Rating (Lb. Ins.)
68
Boston Gear 800-825-6544
P-1930-BG
04/10
Miter & Bevel Gears
Section Contents
C
CATALOG NUMBER / DIMENSIONS
MITER GEARS............................................................................................................................ 70-72
SPIRAL MITER GEARS .................................................................................................................... 73
BEVEL GEARS ............................................................................................................................ 74-77
SPIRAL BEVEL GEARS.................................................................................................................... 78
SELECTION PROCEDURE .......................................................................................................................79
HORSEPOWER AND TORQUE RATINGS
MITER GEARS............................................................................................................................ 80-81
BEVEL GEARS .................................................................................................................................. 82
SPIRAL MITER GEARS .................................................................................................................... 83
SPIRAL BEVEL GEARS.................................................................................................................... 83
STOCK ALTERED / CUSTOM MITER AND BEVEL GEARS................................................................. 3-5
MITER / BEVEL GEAR ENGINEERING INFORMATION ............................................................... 307-309
P-1930-BG
04/10
Boston Gear 800-825-6544
69
Miter Gears
48 through 20 Diametral Pitch (Nylon, Brass, Stainless Steel & Steel – Unhardened)
1:1 Ratio 20° Pressure Angle
All gears have “Coniflex”® tooth form, except as noted.
MOUNTING
DISTANCE
FACE
PITCH
DIA.
D
HUB
PROJ.
BORE
HUB
DIA.
STANDARD TOLERANCES*
REFERENCE PAGES
DIMENSION
Alterations — 314
Lubrication — 314
Materials — 315
BORE
TOLERANCE
All
±.0005
*Brass and Steel only.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
C
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Hub
Dia. Proj.
48
DIAMETRAL PITCH
15
.312
.07
.125
.312
.215
Catalog
Number
Item
Code
Catalog Item
Number Code
BRASS
G460Y† 12126
—
—
G461Y† 12128
—
—
STAINLESS
STEEL
STEEL
UNHARDENED
GSS460Y† 49984
—
—
—
—
—
—
GSS461Y† 49985 L94Y† 12140
—
—
—
—
.13
.19
.16
.25
MOLDED
NYLON
GP4815†‡ 54096
GP4818Y† 54097
—
—
GP4824Y† 54098
Catalog
Number
Item
Code
Catalog Item
Number Code
18
.375
.08
.125
.406
.286
24
.500
.08
.1875
.531
.375
.25
.33
.31
.38
DIAMETRAL PITCH
16
.500
.12
.1875
.500
24
.1875
.688
.349
.406
.427
.41
.50
.50
.19
.19
.25
GP3216Y†
GP3224Y†
—
54099
54100
—
G462Y†
—
G463Y†
12114
—
12116
GSS462Y†
—
GSS463Y†
49986
—
49987
L97Y†
—
L95Y†
12146
—
12142
.1875
.500
.349
.41
.19
—
—
—
—
—
—
L93Y
12138
GP2424Y†
—
GP2430Y†
GP2436Y†
54101
—
54102
54103
—
G464Y
G465Y
G466Y
—
12100
12102
12104
—
—
—
—
—
—
—
—
—
L96Y
—
—
—
12144
—
—
—
—
—
—
—
—
L98Y
12148
32
.750
.14
30
DIAMETRAL PITCH
15
.500
.12
24
DIAMETRAL PITCH
24
1.000
.20
.250
.906
.567
.62
30
36
1.250
1.500
.23
.23
.250
.3125
1.031
1.188
.590
.620
.62
.69
.19
.28
.31
.31
.250
.672
.489
.50
.31
20
DIAMETRAL PITCH
12
.600
.13
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
†Not “Coniflex” tooth form. Can be furnished with “Coniflex” tooth on special order.
‡Acetal.
70
Boston Gear 800-825-6544
P-1930-BG
04/10
Miter Gears
16 through 10 Diametral Pitch (Nylon & Steel – Unhardened & Hardened)
1:1 Ratio 20° Pressure Angle
All gears have “Coniflex”® tooth form, except as noted.
All hardened steel gears have teeth only hardened, except as noted,
and are equipped with standard keyways and setscrews
MOUNTING
DISTANCE
KEYWAY
FACE
PITCH
DIA.
D
SETSCREW
HUB
PROJ.
BORE
HUB
DIA.
REFERENCE PAGES
STANDARD TOLERANCES*
DIMENSION
BORE
Alterations — 314
Horsepower Ratings — 80, 81
Lubrication — 314
Materials — 315
Selection Procedure — 79
TOLERANCE
All
±.0005
*Steel only.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Dia.
Hub
Proj.
16
DIAMETRAL PITCH
12
.750
.16
16
1.000
.23
20
1.250
.28
24
1.500
.32
32
2.000
.39
.3125
.375
.4375
.500
.500
.812
1.062
1.250
1.375
1.562
.583
.755
.849
.880
.875
.62
.75
1.00
1.00
1.25
.38
.44
.50
.50
.38
.375
.4375
1.062
.739
.88
.50
1.250
.864
1.00
.50
1.500
1.021
1.25
.63
1.750
1.192
1.38
.69
1.875
2.312
1.224
1.489
1.31
1.62
.69
.84
2.000
1.364
1.62
.81
2.438
1.630
2.00
.94
Catalog
Number
Item
Code
MOLDED
NYLON
—
—
GP1616Y† 54104
—
—
—
—
GP1632Y†‡ 54105
Catalog
Number
Item
Code
STEEL
UNHARDENED
L99Y
12150
L110Y
12174
L111Y
12176
L112Y
12156
—
—
Catalog
Number
C
Item
Code
STEEL
HARDENED
—
—
HLK110Y**
12326
—
—
—
—
—
—
14
DIAMETRAL PITCH
14
1.000
.20
—
—
—
—
L124Y
L100Y
12202
12152
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
L125Y
L126Y
L101Y
L127Y
L102Y
L119Y
L120Y
L121Y
L133Y
L113Y
L114Y
12204
12206
12154
12208
12158
12190
12192
12194
12218
12178
12180
—
—
HLK101Y**
—
HLK102Y
—
—
HLK121Y
—
—
HLK114Y
—
—
12328
—
12330
—
—
12334
—
—
12332
—
—
—
—
—
—
—
—
—
—
—
—
L128Y
L129Y
L103Y
L130Y
L104Y
L131Y
12210
12212
12160
12214
12162
12216
—
HLK129Y
HLK103Y
HLK130Y
HLK104Y
HLK131Y
—
12348
12344
12350
12346
12352
12
DIAMETRAL PITCH
15
1.250
.29
18
1.500
.33
21
1.750
.40
24
30
2.000
2.500
.44
.55
.375
.4375
.500
.500
.625
.500
.5625
.625
.750
.500
.625
10
DIAMETRAL PITCH
20
2.000
.45
25
2.500
.56
.500
.625
.750
.750
.875
1.000
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
†Not “Coniflex” tooth form.
**Hardened all over.
‡Nylon (Mineral Filled).
P-1930-BG
04/10
Boston Gear 800-825-6544
71
Miter Gears
8 through 4 Diametral Pitch (Steel – Unhardened, Hardened & Cast Iron)
1:1 Ratio 20° Pressure Angle
All gears have “Coniflex”® tooth form, except as noted.
All hardened steel gears have teeth only hardened, except as
noted, and are equipped with standard keyways and
setscrews. All unhardened steel gears have no keyway and no
setscrew.
MOUNTING
DISTANCE
KEYWAY
FACE
PITCH
DIA.
D
SETSCREW
HUB
PROJ.
BORE
HUB
DIA.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 80, 81
Lubrication — 314
Materials — 315
Selection Procedure — 79
STANDARD TOLERANCES
DIMENSION
BORE
All
Catalog
Number
Item
Code
TOLERANCE
±.0005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
C
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Dia.
Hub
Proj.
8
DIAMETRAL PITCH
.66
24
3.000
.68
28
32
3.500
.77
4.000
.77
.85
.85
.750
1.000
1.250
1.000
1.1875
1.250
.875
1.000
.875
2.562
1.583
1.75
.81
2.750
1.786
2.50
1.00
3.250
2.099
2.50
1.25
2.875
3.625
3.438
1.724
2.286
2.098
2.00
3.00
2.25
.88
1.13
1.12
1.250
1.500
1.250
1.500
1.000
1.125
3.625
2.317
3.00
1.31
4.125
2.630
3.25
1.50
4.250
4.625
2.640
2.605
2.50
2.88
1.38
1.19
4.625
3.005
3.50
1.75
5.500
2.660
3.75
1.00
5.500
3.567
4.00
1.94
6.000
3.630
5.00
1.94
Catalog
Number
Item
Code
Catalog
Number
Item
Code
STEEL
UNHARDENED
L115Y
12182
L105Y-A 12164
L116Y
12184
L117Y
12186
L132Y
12196
L106Y
12166
—
—
L123Y
12200
—
—
STEEL
HARDENED
HLK115Y
12366
HLK105YA 12362
HLK116Y
12368
HLK117Y
12370
HLK132Y
12374
HLK106Y
12364
—
—
HLK123Y
12372
—
—
CAST IRON
—
—
—
—
—
—
—
—
—
—
—
—
OA828Y-1 12418
—
—
OA832Y-1 12420
L118Y
L107Y
L134Y
L135Y
—
—
12188
12168
12220
12222
—
—
HLK118Y
HLK107Y
—
—
—
—
12386
12384
—
—
—
—
OA624Y†
—
—
—
OA630Y-1
OA636Y-1
12412
—
—
—
12414
12416
L122Y
L136Y
L108Y
—
12198
12224
12170
—
HLK122Y
—
HLK108Y
—
12398
—
12396
—
—
OA525Y
—
OA540Y-1
—
12408
—
12410
L137Y
L109Y
L138Y
12226
12172
12228
—
HLK109Y
—
—
12404
—
—
OA424Y**
—
—
12406
—
6
DIAMETRAL PITCH
24
4.000
.87
27
4.500
.96
30
36
5.000
6.000
1.16
1.28
5
DIAMETRAL PITCH
25
5.000
1.12
40
8.000
1.50
1.375
1.500
1.750
1.375
4
DIAMETRAL PITCH
24
6.000
1.35
28
7.000
1.43
1.500
1.750
2.000
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
†Hub Dia. — 2.750"
**Hub Proj. — 2.000"
72
Boston Gear 800-825-6544
P-1930-BG
04/10
Spiral Miter Gears
18 through 5 Diametral Pitch (Steel – Unhardened & Hardened)
1:1 Ratio 20° Pressure Angle – 35° Spiral Angle
All hardened steel gears have teeth only hardened, except as
noted, and are equipped with standard keyways and
setscrews
MOUNTING
DISTANCE
FACE
PITCH
DIA.
D
HUB
PROJ.
BORE
HUB
DIA.
STANDARD TOLERANCES
DIMENSION
BORE
REFERENCE PAGES
TOLERANCE
All
Alterations — 314
Horsepower Ratings — 83
Lubrication — 314
Materials — 315
Selection Procedure — 79
±.0005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Dia.
Hub
Proj.
18
DIAMETRAL PITCH
18
1.000
.22
.375
1.062
.739
.75
.44
Catalog
Number
Item
Code
Catalog
Number
C
Item
Code
STEEL
UNHARDENED
LSA110Y-R
12310
LSA110Y-L
12312
STEEL
HARDENED
HLSK110Y-R†
12322
HLSK110Y-L†
12324
LSA101Y-R
LSA101Y-L
LSA102Y-R
LSA102Y-L
12282
12284
12286
12288
HLSK101Y-R†
HLSK101Y-L†
HLSK102Y-R
HLSK102Y-L
12336
12338
12340
12342
12290
12292
12294
12296
HLSK103Y-R
HLSK103Y-L
HLSK104Y-R
HLSK104Y-L
12354
12356
12358
12360
12
DIAMETRAL PITCH
15
1.250
.30
.500
1.250
.864
1.00
.50
18
1.500
.34
.625
1.500
1.021
1.25
.56
10
DIAMETRAL PITCH
20
2.000
.47
.750
2.000
1.364
1.62
.78
25
2.500
.58
.875
2.438
1.630
2.00
.91
LSA103Y-R
LSA103Y-L
LSA104Y-R
LSA104Y-L
1.1875
3.250
2.099
2.50
1.25
LSA106Y-R
LSA106Y-L
12302
12304
HLSK106Y-R
HLSK106Y-L
12376
12378
1.000
2.750
1.786
2.50
.88
LSA105YA-R
LSA105YA-L
12298
12300
HLSK105YA-R
HLSK105YA-L
12380
12382
12314
12316
12306
12308
HLSK118Y-R
HLSK118Y-L
HLSK107Y-R
HLSK107Y-L
12392
12394
12388
12390
12318
12320
HLSK122Y-R
HLSK122Y-L
12400
12402
8
DIAMETRAL PITCH
28
3.500
.78
7
DIAMETRAL PITCH
21
3.000
.69
6
DIAMETRAL PITCH
3.625
2.317
3.00
1.31
LSA118Y-R
LSA118Y-L
LSA107Y-R
LSA107Y-L
4.625
3.005
3.50
1.75
LSA122Y-R
LSA122Y-L
1.250
24
4.000
.89
1.500
5
DIAMETRAL PITCH
25
5.000
1.15
1.375
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
†Hardened all over.
P-1930-BG
04/10
Boston Gear 800-825-6544
73
Bevel Gears
48 through 20 Diametral Pitch (Brass, Stainless Steel & Steel – Hardened & Unhardened)
20° Pressure Angle
All gears have “Coniflex”® tooth form, except as noted. All
hardened steel gears have teeth only hardened and are
equipped with standard keyways and setscrews, except as
noted.
MOUNTING
DISTANCE
KEYWAY
D
FACE
PITCH
DIA.
MOUNTING
DISTANCE
D
BORE
HUB
DIA.
SETSCREW
HUB
PROJ.
PITCH
DIA.
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
STANDARD TOLERANCES
DIMENSION
BORE
TOLERANCE
All
±.0005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
C
Ratio
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Hub
Dia.
Proj.
Catalog
Number
Item
Code
48
DIAMETRAL PITCH
36
.750
2:1
18
.375
36
.750
3:1
12
.250
Item
Code
12136
12134
12132
12130
STAINLESS
STEEL
GSS479Y-G†
49991
GSS479Y-P†
49990
GSS478Y-G†
49989
GSS478Y-P†
49988
12120
12118
12108
12106
GSS481Y-G†
GSS481Y-P†
GSS486Y-G†
GSS486Y-P†
49993
49992
49995
49994
—
—
—
—
—
—
—
—
.09
.1875
.125
.1875
.125
.438
.594
.375
.562
.257
.335
.257
.285
.44
.28
.44
.22
.19
.19
.19
.17
BRASS
G479Y-G†
G479Y-P†
G478Y-G†
G478Y-P†
.14
.1875
.24
.3125
.1875
.594
.719
.688
1.250
.382
.365
.445
.500
.56
.38
1.00
.38
.25
.17
.31
.22
G481Y-G†
G481Y-P†
G486Y-G†
G486Y-P†
.24
.250
.1875
.3125
.250
.781
1.062
.938
1.375
.460
.540
.507
.630
.88
.56
1.12
.69
.31
.25
.31
.28
G485Y-G
12124
G485Y-P
12122
G487Y-G
12112
G487Y-P
12110
STEEL
UNHARDENED
L147Y-G
12234
L147Y-P
12236
—
—
—
—
.12
Catalog
Number
32
DIAMETRAL PITCH
32
1.000
2:1
16
.500
64
2.000
4:1
16
.500
24
DIAMETRAL PITCH
36
1.500
18
.750
2:1
48
2.000
24
1.000
.26
20
DIAMETRAL PITCH
20
1.000
10
.500
2:1
20
1.000
10
.500
.18
.18
.375
.1875
.375
.1875
.688
.750
.688
.750
.460
.425
.460
.425
.75
.41
.75
.41
.31
.25
.31
.25
STEEL
HARDENED
—
—
—
—
HL147Y-G‡
11854
HL147Y-P‡
11856
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
†Not “Coniflex” tooth form. Can be furnished with “Coniflex” tooth on special order.
‡These gears have No. 47 (.0785) drilled hole in hub. No keyway or setscrew.
74
Boston Gear 800-825-6544
P-1930-BG
04/10
Bevel Gears
16 through 12 Diametral Pitch (Steel – Unhardened, Hardened & Cast Iron)
20° Pressure Angle
All gears have “Coniflex”® tooth form.
All Hardened steel gears have teeth only hardened and are
equipped with standard keyways and setscrews.
MOUNTING
DISTANCE
D
FACE
PITCH
DIA.
D
BORE
HUB
DIA.
MOUNTING
DISTANCE
HUB
PROJ.
PITCH
DIA.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 82
Lubrication — 314
Materials — 315
Selection Procedure — 79
STANDARD TOLERANCES
DIMENSION
BORE
TOLERANCE
All
±.0005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Ratio
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Hub
Dia.
Proj.
16
DIAMETRAL PITCH
24
1.500
16
1.000
1-1/2:1
24
1.500
16
1.000
24
1.500
12
.750
2:1
32
2.000
16
1.000
48
3.000
3:1
16
1.000
64
4.000
4:1
16
1.000
96
6.000
6:1
16
1.000
.26
.26
.20
.19
.36
.42
.49
.62
.500
.375
.500
.375
.500
.375
.500
.375
.625
.4375
.625
.500
.625
.500
1.188
1.250
1.188
1.250
1.000
1.125
1.188
1.500
1.312
2.000
1.375
2.500
1.688
3.750
.760
.740
.750
.740
.625
.575
.775
.845
.882
.920
.898
.990
1.257
1.375
1.12
.81
1.12
.81
1.00
.66
1.12
.81
1.50
.88
2.25
.81
1.75
.94
.56
.44
.56
.44
.44
.34
.50
.44
.56
.47
.56
.47
.88
.72
.500
.375
.500
1.375
.945
1.62
.66
1.625
.965
.81
.56
1.750
1.135
1.50
.78
1.875
1.875
2.375
1.875
1.130
1.275
1.385
1.275
1.25
2.12
1.31
2.12
.66
.88
.81
.88
2.375
1.375
1.31
.81
Catalog Item
Number Code
Catalog Item
Number Code
STEEL
UNHARDENED
L146Y-G 12230
L146Y-P 12232
—
—
—
—
L148Y-G 12238
L148Y-P 12240
L149Y-G 12242
L149Y-P 12244
—
—
—
—
—
—
—
—
—
—
—
—
STEEL
HARDENED
—
—
—
—
HL146Y-G 11850
HL146Y-P 11852
HL148Y-G 11858
HL148Y-P 11860
HL149Y-G 11862
HL149Y-P 11864
—
—
—
—
—
—
—
—
—
—
—
—
Catalog
Number
C
Item
Code
CAST IRON GEARS
STEEL PINIONS
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
PA3316Y-G 12484
PA3316Y-P 12486
PA4416Y-G 12492
PA4416Y-P 12494
PA6616Y-G 12516
PA6616Y-P 12518
14
DIAMETRAL PITCH
28
2.000
2:1
14
1.000
.36
.35
L150Y-G 12246 HL150Y-G 11866
—
—
HL150Y-P 11868
L150Y-P 12248
—
—
—
—
—
—
—
—
L151Y-G
—
L151Y-P
L152BY-G
L152BY-P
L152Y-G
—
L152Y-P
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
12
DIAMETRAL PITCH
1-1/2:1
27
2.250
.42
2:1
18
36
18
36
1.500
3.000
1.500
3.000
.41
.54
.54
.54
18
1.500
.53
.500
.750
.500
.625
.500
1.000
.625
.750
12250
—
12254
12260
12262
12256
—
12258
—
HL151Y-G
HL151Y-P
—
—
HL152Y-G
HL152Y-P
—
—
11870
11872
—
—
11874
11876
—
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
P-1930-BG
04/10
Boston Gear 800-825-6544
75
Bevel Gears
12 and 10 Diametral Pitch (Steel – Unhardened, Hardened & Cast Iron)
20° Pressure Angle
All gears have “Coniflex”® tooth form.
All Hardened steel gears have teeth only hardened and are
equipped with standard keyways and setscrews.
MOUNTING
DISTANCE
D
FACE
PITCH
DIA.
MOUNTING
DISTANCE
D
BORE
HUB
DIA.
HUB
PROJ.
PITCH
DIA.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 82
Lubrication — 314
Materials — 315
Selection Procedure — 79
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
C
Ratio
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Hub
Dia. Proj.
Catalog Item
Number Code
Catalog Item
Number Code
STEEL
UNHARDENED
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
STEEL
HARDENED
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
12
DIAMETRAL PITCH
36
3.000
18
1.500
2:1
48
4.000
24
2.000
54
4.500
3:1
18
1.500
72
6.000
4:1
18
1.500
72
6.000
6:1
12
1.000
.625
.500
.625
.500
.625
.500
.750
.500
.750
.500
1.500
2.250
2.000
2.875
1.750
3.000
2.000
3.750
1.750
3.750
.882
1.205
1.180
1.440
1.063
1.350
1.320
1.365
1.320
1.495
1.44
1.25
1.63
1.50
1.75
1.25
2.00
1.25
2.00
.94
.50
.69
2.250
1.445
2.50
1.00
.72
.750
1.000
.750
.875
.750
1.250
.875
.71
.750
.79
1.000
.875
.875
.750
.875
.625
1.000
.625
2.500
2.500
3.125
2.500
3.125
2.625
3.375
2.750
4.375
2.750
4.375
2.250
3.875
2.500
5.500
1.525
1.695
1.805
1.695
1.805
1.600
1.555
1.865
2.155
1.913
2.155
1.632
1.610
1.820
1.870
1.75
3.00
1.75
3.00
1.75
2.00
2.00
3.00
1.75
3.00
1.75
2.50
1.44
2.75
1.44
.91
1.19
1.06
1.19
1.06
1.00
.75
1.38
1.31
1.38
1.31
1.13
.84
1.31
.97
.47
.59
.60
.61
.74
.75
.75
.69
.95
.72
.95
.72
Catalog
Number
Item
Code
CAST IRON GEARS
STEEL PINIONS
PA3212Y-G 12480
PA3212Y-P 12482
PA4212Y-G 12488
PA4212Y-P 12490
PA45312Y-G 12532
PA45312Y-P 12534
PA6412Y-G 12508
PA6412Y-P 12510
PA6612Y-G 12512
PA6612Y-P 12514
10
DIAMETRAL PITCH
1 1/2:1
2:1
3:1
4:1
6:1
30
3.000
.58
20
40
20
40
20
50
25
60
20
60
20
60
15
90
15
2.000
4.000
2.000
4.000
2.000
5.000
2.500
6.000
2.000
6.000
2.000
6.000
1.500
9.000
1.500
.58
.72
.79
.73
.86
L153Y-G
—
L153Y-P
L155Y-G
L155Y-P
—
—
—
—
L157Y-G
L157Y-P
—
—
—
—
—
—
12264
—
12266
12268
12270
—
—
—
—
12274
12276
—
—
—
—
—
—
—
HL153Y-G
HL153Y-P
—
—
HL155Y-G
HL155Y-P
—
—
—
—
—
—
—
—
—
—
—
11878
11880
—
—
11882
11884
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
PA5210Y-G
PA5210Y-P
—
—
PA6310Y-G
PA6310Y-P
PA6410Y-G
PA6410Y-P
PA9610Y-G
PA9610Y-P
—
—
—
—
—
—
—
12496
12498
—
—
12500
12502
12504
12506
12524
12526
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
76
Boston Gear 800-825-6544
P-1930-BG
04/10
Bevel Gears
8 through 4 Diametral Pitch (Steel – Unhardened, Hardened & Cast Iron)
20° Pressure Angle
All gears have “Coniflex”® tooth form.
All Hardened steel gears have teeth only hardened and are
equipped with standard keyways and setscrews.
MOUNTING
DISTANCE
KEYWAY
D
FACE
PITCH
DIA.
D
BORE
HUB
DIA.
SETSCREW
MOUNTING
DISTANCE
HUB
PROJ.
PITCH
DIA.
REFERENCE PAGES
STANDARD TOLERANCES
DIMENSION
BORE
Alterations — 314
Horsepower Ratings — 82
Lubrication — 314
Materials — 315
Selection Procedure — 79
TOLERANCE
All
±.0005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Ratio
No. of
Teeth
Pitch
Dia.
Face
Bore
MD
*
D
Dia.
Hub
Proj.
8
2:1
3:1
4:1
5.000
20
40
20
48
16
64
16
72
18
2.500
5.000
2.500
6.000
2.000
8.000
2.000
9.000
2.250
Catalog Item
Number Code
Catalog
Number
Item
Code
1.000
1.500
1.000
1.000
.875
.875
.750
1.000
.875
1.125
.875
2.875
1.850
3.00
1.25
4.000
2.875
4.000
2.375
4.250
2.750
5.250
3.250
5.750
2.290
1.850
2.290
1.632
2.085
1.882
2.105
2.320
2.470
2.12
3.00
2.12
2.75
1.75
2.75
1.88
3.00
2.13
1.41
1.25
1.41
1.00
1.19
1.25
1.22
1.69
1.22
STEEL
STEEL
CAST IRON GEARS
UNHARDENED
HARDENED
STEEL PINIONS
L156Y-G 12252
—
—
—
—
—
—
HL156Y-G 11886
—
—
L156Y-P 12272 HL156Y-P 11888
—
—
—
—
—
—
PA528Y-G 12424
—
—
—
—
PA528Y-P 12426
—
—
—
—
PA638Y-G 12436
—
—
—
—
PA638Y-P 12438
—
—
—
—
PA848Y-G 12452
—
—
—
—
PA848Y-P 12454
—
—
—
—
PA948Y-G 12460
—
—
—
—
PA948Y-P 12462
1.125
1.750
1.125
1.125
1.000
1.125
1.000
1.125
1.000
1.125
.875
3.500
4.750
3.500
4.750
3.500
4.750
3.750
5.000
3.438
5.438
3.000
5.250
2.260
2.765
2.260
2.765
2.260
2.765
2.305
2.515
1.898
2.560
2.132
2.575
3.25
2.50
3.25
2.50
3.25
2.50
3.50
2.50
3.25
2.62
3.25
2.12
1.50
1.59
1.50
1.59
1.50
1.59
1.50
1.25
1.00
1.25
1.25
1.44
L158Y-G 12278
—
—
—
L158Y-P 12280
—
—
—
—
—
HL158Y-G 11890
—
—
—
HL158Y-P 11892
—
—
—
—
—
PA626Y-G
—
—
—
—
PA626Y-P
—
—
—
—
PA726Y-G
—
—
—
—
PA726Y-P
—
—
—
—
PA826Y-G
—
—
—
—
PA826-Y-P
—
—
—
—
PA7536Y-G
—
—
—
—
PA7536Y-P
1.32
1.125
1.000
1.250
1.000
3.500
4.375
3.750
5.875
2.257
2.390
2.507
2.685
3.25
2.62
3.75
2.62
1.38
1.28
1.69
1.31
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
PA625Y-G
PA625Y-P
PA935Y-G
PA935Y-P
12428
12430
12456
12458
1.40
1.125
1.125
4.250
6.000
2.695
3.350
3.75
3.25
1.56
1.81
—
—
—
—
—
—
—
—
PA824Y-G
PA824Y-P
12444
12446
DIAMETRAL PITCH
40
Catalog Item
Number Code
.83
.83
.83
.84
.85
1.23
6
DIAMETRAL PITCH
36
6.000
18
3.000
36
6.000
18
3.000
36
6.000
2:1
18
3.000
42
7.000
21
3.500
48
8.000
24
4.000
45
7.500
3:1
15
2.500
1.07
1.06
1.07
1.06
1.07
1.06
1.18
1.08
—
—
—
—
12432
12434
12440
12442
12448
12450
12520
12522
5
DIAMETRAL PITCH
30
6.000
2:1
15
3.000
45
9.000
3:1
15
3.000
1.05
4
DIAMETRAL PITCH
32
8.000
2:1
16
4.000
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
P-1930-BG
04/10
Boston Gear 800-825-6544
77
C
Spiral Bevel Gears
30 through 8 Diametral Pitch (Steel – Unhardened & Hardened)
20° Pressure Angle – 35° Spiral Angle
All Hardened steel gears have teeth only hardened and are
equipped with standard keyways and setscrews, except as
noted. All pinions are left hand.
MOUNTING
DISTANCE
D
FACE
PITCH
DIA.
D
BORE
HUB
DIA.
MOUNTING
DISTANCE
HUB
PROJ.
PITCH
DIA.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 83
Lubrication — 314
Materials — 315
Selection Procedure — 79
Ratio
C
No. of
Teeth
Pitch
Dia.
STANDARD TOLERANCES
DIMENSION
BORE
±.0005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Face
Bore
MD
*
D
Dia.
Hub
Proj.
30
DIAMETRAL PITCH
26
.87
13
.43
2:1
26
.87
13
.43
All
TOLERANCE
.14
.14
Catalog
Number
Item
Code
Catalog
Number
Item
Code
.250
.1875
.375
.1875
.688
.750
.688
.750
.480
.453
.480
.453
.75
.38
.75
.38
.38
.30
.38
.30
STEEL
UNHARDENED
SS302-G
11938
SS302-P
11940
—
—
—
—
STEEL
HARDENED
—
—
—
—
SH302-G
11914
SH302-P†
11916
.500
.3125
.625
.3125
1.000
1.062
1.000
1.062
.730
.623
.730
.623
1.12
.62
1.12
.62
.42
.33
.42
.33
SS192-G
SS192-P
—
—
11934
11936
—
—
—
—
SH192-G
SH192-P†
—
—
11910
11912
.625
.4375
.750
.4375
.750
.500
.875
.500
1.188
1.250
1.188
1.250
1.375
1.625
1.375
1.625
.760
.625
.760
.625
.855
.848
.855
.848
1.38
.81
1.38
.81
1.62
1.00
1.62
1.00
.50
.30
.50
.30
.56
.45
.56
.45
SS142-G
SS142-P
—
—
SS142-1G
SS142-1P
—
—
11926
11928
—
—
11930
11932
—
—
—
—
SH142-G
SH142-P
—
—
SH142-1G
SH142-1P
—
—
11902
11904
—
—
11906
11908
1.000
.625
1.1875
.625
1.875
2.375
1.875
2.375
1.135
1.219
1.135
1.219
2.00
1.50
2.00
1.50
.75
.63
.75
.63
SS102-G
SS102-P
—
—
11922
11924
—
—
—
—
SH102-G
SH102-P
—
—
11898
11900
1.250
.750
1.500
.750
2.500
3.125
2.500
3.125
1.575
1.677
1.575
1.677
2.88
1.88
2.88
1.88
1.06
.94
1.06
.94
SS82-G
SS82-P
—
—
11918
11920
—
—
—
—
SH82-G
SH82-P
—
—
11894
11896
19
DIAMETRAL PITCH
26
1.37
13
.68
2:1
26
1.37
13
.68
.25
.25
14
DIAMETRAL PITCH
26
1.86
13
.93
26
1.86
13
.93
2:1
32
2.29
16
1.14
32
2.29
16
1.14
.31
.31
.38
.38
10
DIAMETRAL PITCH
34
3.40
17
1.70
2:1
34
3.40
17
1.70
.57
.57
8
DIAMETRAL PITCH
34
4.250
17
2.125
2:1
34
4.250
17
2.125
.71
.71
*Mounting Distance (MD) must not be made less than dimension shown, see Page 308.
†No keyway or setscrew.
78
Boston Gear 800-825-6544
P-1930-BG
04/10
Miter & Bevel Gears
Boston stock miter and bevel gears are designed for transmission of power
and/or motion between intersecting shafts at a right angle (90°). Miter gears are
a special type of bevel gear designed to operate as pairs being identical in
number of teeth and pitch (1 to 1 ratio only). Other Boston stock bevel gear sets
are available with ratios from 1-1/2:1 to 6:1.
All Boston standard stock bevels and miters are manufactured with a 20°
pressure angle. These bevel gears are made in accordance with AGMA
specifications for a long and short addendum system for gears and pinions,
which serves to reduce the amount of pinion tooth undercut and to nearly
equalize the strength and durability of the gear and pinion. Boston straight tooth
bevel and miter gears have generated teeth with “Coniflex”® tooth form, unless
otherwise specified.
INTERCHANGE
Stock miter and bevel gears having identical diametral pitch, number of teeth
and mounting distance (and spiral angle for spiral bevels) are interchangeable.
SPIRAL VS. STRAIGHT TOOTH
Boston standard stock straight bevel gears can be used for all applications
requiring transmission of power and motion between intersecting shafts. Boston
standard stock spiral bevel gears have an overlapping tooth action which
results in a smoother gear action, lower noise, and higher load capacity than a
straight bevel of equal size.
®Trademark of the Gleason Works.
Selection Procedure
Approximate horsepower ratings for selected sizes (number
of teeth) at various operating speeds (RPM) are given for
Boston standard stock Bevel and Miter gears.
For straight tooth Miter gears, refer to Pages 80, 81.
For straight tooth Bevel gears, refer to Page 82.
For spiral tooth Miter gears, refer to Page 83.
For spiral tooth Bevel gears, refer to Page 83.
1. Determine service factor.
a. Using Application Classification Chart I, pages 323-324
determine service factor or
b. With knowledge of operating conditions and load
classification, select service factor from Table 1.
2. Determine Design Horsepower.
Design HP = Application Load x Service Factor (Table 1)
All ratings are based on normal operating conditions, that is:
properly mounted and lubricated, carrying a smooth load for
not more than 10 hours (Service Factor = 1.0). Refer to Table 1
for service factors in other service conditions.
3. Select a gear set with horsepower capacity equal to (or
greater than) design horsepower determined in Step 2.
TABLE 1
Service
Factor
.8
1.0
1.25
1.50
1.75
2.0
Operating Conditions
Uniform — not more than 15 minutes in 2 hours.
Moderate Shock — not more than 15 minutes in 2 hours.
Uniform — not more than 10 hours per day.
Moderate Shock — not more than 10 hours per day.
Uniform — more than 10 hours per day.
Heavy Shock — not more than 15 minutes in 2 hours.
Moderate Shock — more than 10 hours per day.
Heavy Shock — not more than 10 hours per day.
Heavy Shock — more than 10 hours per day.
Heavy shock loads and/or severe wear conditions may
require the use of higher service factors. Consultation with
factory is recommended in these applications.
P-1930-BG
04/10
Boston Gear 800-825-6544
79
C
Miter Gears
Steel & Iron – Straight Tooth (1:1 Ratio)
L-Series – Unhardened Steel
HLK Series – Hardened Steel (Teeth only)
OA Series – Cast Iron
APPROXIMATE HP & TORQUE* RATINGS FOR CLASS I SERVICE (Service Factor = 1.0)
Catalog
Number Pitch
50 RPM
100 RPM
200 RPM
300 RPM
600 RPM
900 RPM
1200 RPM 1800 RPM
HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque
L110Y
L111Y
L101Y
L125Y
L126Y
HLK110Y
L112Y
L102Y
L127Y
L119Y
L120Y
L121Y
L133Y
HLK101Y
L113Y
HLK102Y
L103Y
L128Y
L129Y
L114Y
HLK121Y
L130Y
L104Y
L131Y
HLK103Y
HLK129Y
OA828Y-1
L105Y-A
L115Y
L116Y
HLK114Y
OA832Y-1
HLK104Y
HLK130Y
HLK131Y
16
.02
.03
24.7
37.1
.03
.05
18.5
30.9
.06
.10
18.5
30.9
.09
.13
18.5
26.8
.15
.24
15.4
24.7
.21
.32
14.4
22.0
.26
.38
13.4
19.6
.33
.48
11.3
16.5
12
.03
37.1
.06
37.1
.12
37.1
.17
35.0
.29
29.9
.40
27.5
.47
24.2
.59
20.2
16
.04
49.4
.06
.07
37.1
43.2
.12
.14
37.1
43.2
.18
.20
37.1
41.2
.30
.30
30.9
30.9
.42
.44
28.8
30.2
.52
.52
26.8
26.8
.66
.64
22.6
22.0
12
.05
61.8
.09
55.6
.18
55.6
.25
51.5
.42
43.2
.56
38.4
.66
34.0
.81
27.8
12
.07
86.5
.14
86.5
.25
77.2
.35
72.1
.60
61.8
.77
52.8
.90
46.3 1.1
37.7
12
.06 74.1
.09 111
.10 124
.12 74.1
.17 105
.18 111
.24 74.1
.33 102
.36 111
.34 70.0
.45 92.6
.50 103
.58
.75
.84
59.7
77.2
86.5
.96
.96
1.1
65.9 1.1
65.9 1.1
75.5 1.3
56.6 1.3
56.6 1.3
66.9 1.6
44.6
44.6
54.9
10
.11 136
.20 124
.37 114
.52 107
.87
89.6
1.1
75.5 1.3
66.9 1.5
51.5
12
.15 185
.14 173
.29 179
.28 173
.52 161
.50 154
.71 146
.70 144
1.1
1.2
113
124
1.4
1.5
96.1 1.6
103
1.8
82.4 1.9
92.6 2.2
65.2
75.5
10
.18 222
.33 204
.61 188
.83 171
1.3
134
1.6
110
1.7
87.5 2.2
75.5
10
.20 247
.40 247
.74 229
1.0
206
1.7
175
2.2
151
2.6
134
3.1
8
.28 346
.53 327
.93 287
1.2
247
1.9
196
2.3
158
—
—
—
8
.30 371
.56 346
1.0
309
1.4
288
2.1
216
2.6
178
3.0
154
3.4
116
12
8
.29 358
.37 457
.58 358
.68 420
1.0
1.2
309
371
1.4
1.6
288
329
2.3
2.4
237
247
2.8
2.8
192
192
3.2
—
165
—
3.9
—
133
—
10
.33 408
.66 408
1.2
371
1.7
350
2.6
268
3.3
226
3.8
196
4.5
154
C
106
—
Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute. Use for interpolation purposes only.
*Torque (Lb. Ins.) Output Rating
HP (Input)
80
Boston Gear 800-825-6544
P-1930-BG
04/10
Miter Gears
Steel & Iron – Straight Tooth (1:1 Ratio)
L-Series – Unhardened Steel
HLK Series – Hardened Steel (Teeth only)
OA Series – Cast Iron
APPROXIMATE HP & TORQUE* RATINGS FOR CLASS I SERVICE (Service Factor = 1.0)
Catalog
Number
50 RPM
100 RPM
200 RPM
300 RPM
600 RPM
900 RPM 1200 RPM
1800 RPM
Pitch HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque
L106Y
L117Y
L132Y
OA624Y
L123Y
HLK105YA
HLK115Y
HLK116Y
L107Y
L118Y
OA630Y-1
OA525Y
L134Y
L135Y
HLK106Y
HLK117Y
HLK132Y
OA636Y-1
HLK123Y
L108Y
L122Y
L136Y
HLK107Y
HLK118Y
OA424Y
OA540Y-1
L109Y
L137Y
L138Y
HLK108Y
HLK122Y
HLK109Y
8
.42
519
.79
488
1.4
432
1.9
391
2.8
288
3.4
233
3.8
196
—
—
6
8
.46
.55
568
679
.87
1.0
537
618
1.5
1.8
463
556
2.0
2.4
412
494
3.0
3.5
309
360
3.5
4.2
240
288
—
4.6
—
237
—
—
—
—
8
.55
679
1.1
679
2.0
618
2.7
556
4.3
443
5.3
364
5.9
304
6.9
237
6
.69
852
1.3
803
2.2
679
3.0
618
4.5
463
5.3
364
5.8
299
—
—
6
5
.82 1013
.90 1112
1.5
1.6
926
988
2.5
2.7
772
834
3.2
3.5
659
721
4.7
5.1
484
525
—
—
—
—
—
—
—
—
—
—
—
—
6
.90 1112
1.6
988
2.8
865
3.7
762
5.4
556
6.4
439
7.0
360
—
—
8
.80
988
1.6
988
2.8
865
3.7
762
5.7
587
6.8
467
7.6
391
—
—
6
8
1.1
1.0
1359
1235
1.9
2.0
1174
1235
3.2
3.6
988
1112
4.1
4.7
844
968
5.8
7.0
597
721
—
8.4
—
576
—
9.2
—
474
—
—
—
—
5
1.3
1606
2.4
1482
4.1
1266
5.3
1091
7.6
782
9.0
618
—
—
—
—
6
1.3
1606
2.6
1606
4.5
1390
6.0
1235
8.0
824
11.0
755
12.0
618
—
—
4
5
1.6
2.0
1976
2471
2.8
3.5
1729
2162
4.6
5.6
1421
1729
5.9
7.0
1215
1441
8.2
—
844
—
—
—
—
—
—
—
—
—
—
—
—
—
4
2.3
2841
4.2
2594
7.0
2162
8.7
1791
12.4 1276
14.3
981
—
—
—
—
4
3.0
3706
5.3
3274
8.6
2656
10.8
2224
14.6 1503
16.6 1139
—
—
—
—
5
2.4
2965
4.9
3026
8.2
2532
10.0
2059
15.0 1544
18.0 1235
—
—
—
—
4
4.2
5188
8.3
5126 14.0
4324
17.0
3500
25.0 2574
28.0 1922
—
—
—
—
C
Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute. Use for interpolation purposes only.
*Torque (Lb. Ins.) Output Rating
HP (Input)
P-1930-BG
04/10
Boston Gear 800-825-6544
81
Bevel Gears
Steel & Iron – Straight Tooth
L-Series/PA Series Pinions – Unhardened Steel
PA Series – Cast Iron
HL Series – Hardened Steel (Teeth Only)
APPROXIMATE HP & TORQUE* RATINGS FOR CLASS I SERVICE (Service Factor = 1.0)
Catalog
50 RPM†
100 RPM
Number Pitch Ratio HP Torque HP Torque
C
L146Y
HL146Y
L151Y
HL151Y
L153Y
HL153Y
L148Y
HL148Y
L149Y
L150Y
HL150Y
HL149Y
PA3212Y
PA4212Y
L152Y
PA5210Y
HL152Y
L155Y
PA528Y
L156Y
HL155Y
PA626Y
PA625Y
PA726Y
L158Y
PA826Y
HL156Y
PA824Y
HL158Y
PA3316Y
PA45312Y
PA6310Y
PA638Y
L157Y
PA7536Y
PA935Y
PA4416Y
PA6412Y
PA6410Y
PA848Y
PA948Y
PA6616Y
PA6612Y
16
.03 55.6 .06 55.6
16
.04 74.1 .08 74.1
12 1-1/2:1 .10 185 .20 185
12
.14 259 .27 250
10
.24 445 .45 417
10
.33 611 .63 584
16
.02 49.4 .03 37.1
16
.02 49.4 .04 49.4
16
2:1 .04 98.8 .09 111
14
.05 124 .09 111
14
.07 173 .13 161
16
.06 148 .12 148
12
.04 99 .09 111
12
.08 198 .16 198
12
2:1 .14 346 .27 334
10
.15 371 .28 346
12
.19 469 .37 457
10
.30 741 .58 716
8
.20 494 .38 469
8
.54 1334 1.03 1272
10
2:1 .42 1038 .81 1001
6
.40 988 .75 926
5
.43 1062 .82 1013
6
.48 1186 .89 1099
6
1.07 2644 2.02 2495
6
.63 1556 1.20 1482
8
2:1 .76 1878 1.44 1779
4
.98 2421 1.80 2224
6
1.49 3681 2.80 3459
16
.05 185 .11 204
12
.16 593 .31 574
10
.34 1260 .66 1223
8
3:1 .43 1594 .82 1519
10
.34 1260 .66 1223
6
.88 3261 1.66 3076
5
1.53 5670 2.88 5336
16
.06 296 .12 296
12
.17 840 .32 791
10
4:1 .22 1087 .42 1038
8
.43 2125 .83 2051
8
.75 3706 1.43 3533
16
6:1 .09 667 .17 630
12
.12 889 .23 852
200 RPM
HP Torque
.11
.16
.37
.52
.84
1.16
.06
.09
.17
.18
.25
.23
.16
.29
.50
.51
.70
1.08
.70
1.88
1.50
1.30
1.50
1.60
3.62
2.00
2.62
3.20
5.02
.20
.59
1.21
1.52
1.21
3.03
5.16
.24
.61
.80
1.54
2.62
.33
.44
51.0
74.1
171
241
389
537
37.1
55.6
105
111
154
142
99
179
309
315
432
667
432
1161
926
803
926
988
2236
1235
1618
1976
3101
185
547
1121
1408
1121
2807
4781
296
754
988
1902
3236
611
815
300 RPM
HP Torque
.16
.23
.53
.73
1.17
1.62
.09
.12
.24
.26
.36
.33
.23
.41
.72
.70
.99
1.51
.96
2.59
2.10
1.80
2.00
2.10
4.92
2.70
3.60
4.20
6.83
.30
.84
1.70
2.12
1.70
4.17
7.01
.34
.86
1.13
2.15
3.64
.48
.63
600 RPM
HP Torque
900 RPM
HP Torque
1200 RPM
HP Torque
1800 RPM
HP Torque
49.4
.29 44.8 .40 41.2
.48 37.1
.62
71.0
.41 63.3 .55 56.6
.67 51.7
.86
164
.91 141 1.19 122 1.41 109 1.74
225 1.26 195 1.65 170 1.96 151 2.41
361 1.93 298 2.47 254 2.88 222 3.44
500 2.68 414 3.44 354 4.00 309 4.77
37.1
.17 35.0 .23 31.6
.28 28.8
.37
49.4
.23 47.4 .32 43.9
.39 40.1
.52
98.8
.43 88.5 .58 79.6
.71 73.1
.91
107
.47 96.8 .64 87.8
.77 79.3
.99
148
.65 134 .88 121 1.07 110 1.38
136
.60 124 .81 111
.99 102 1.27
95
.40
82 .52
71
.62
64
.76
169
.68 140 .87 119 1.00 103 1.20
296 1.23 253 1.62 222 1.92 198 2.36
288 1.10 226 1.40 192 1.60 165
—
408 1.71 352 2.24 307 2.66 274 3.27
622 2.50 515 3.20 439 3.73 384 4.45
395 1.50 309 1.90 261 2.20 226 —
1066 4.16 856 5.21 715 5.96 614 6.97
865 3.48 716 4.45 611 5.18 533 6.18
741 2.90 597 3.50 480 4.00 412 —
824 3.10 638 3.80 522 4.30 443 —
865 3.90
803
—
—
—
— —
2026 7.67 1579 9.43 1294 10.65 1096 12.24
— —
1112 4.00 824 4.80 659. —
1482 5.78 1190 7.24 994 8.28 852 9.68
1729 7.30 1503 7.50 1029
—
— —
2812 10.65 2193 13.10 1798 14.79 1522 17.00
185
.53 164 .72 148
.88 136 1.12
519 1.44 445 1.89 389 2.24 346 2.75
1050 2.81 868 3.60 741 4.18 645 5.00
1309 3.51 1084 4.49 924 5.22 806 6.24
1050 2.81 868 3.60 741 4.18 645 5.00
2576 6.69 2066 8.38 1725 9.59 1481 11.21
4330 10.93 3375 13.44 2767 15.19 2346 17.45
280
.61 251 .83 228 1.02 210 1.30
708 1.48 609 1.94 533 2.31 476 2.83
931 1.95 803 2.56 703 3.04 626 3.74
1771 3.56 1466 4.56 1252 5.30 1091 6.33
2998 5.92 2438 7.50 2059 8.65 1781 10.21
593
.86 531 1.17 482 1.42 439 1.82
778 1.13 698 1.54 634 1.88 581 2.40
31.9
44.3
89.6
124
177
245
25.4
35.7
62.5
67.9
94.7
87.2
52.2
82.4
162
—
224
305
—
478
424
—
—
—
840
—
664
—
1167
115
283
515
642
515
1154
1796
4178
388
513
869
1401
375
494
Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
*Torque (Lb. Ins.) Output Rating
HP (Input)
†RPM of Pinion
82
Boston Gear 800-825-6544
P-1930-BG
04/10
Steel Spiral Miter & Bevel Gears
Steel Spiral Miter Gears (1:1 Ratio)
LSA Series – Unhardened Steel
HLSK Series – Hardened Steel (Teeth Only)
APPROXIMATE HP & TORQUE* RATINGS FOR CLASS I SERVICE (Service Factor = 1.0)
Catalog
Number
Pitch
50 RPM
HP Torque
100 RPM
HP Torque
200 RPM
HP Torque
300 RPM
600 RPM
900 RPM
HP Torque HP Torque HP Torque
1200 RPM
HP Torque
1800 RPM
HP Torque
LSA110Y
LSA101Y
LSA102Y
HLSK110Y
HLSK101Y
LSA103Y
HLSK102Y
LSA104Y
LSA105YA
HLSK103Y
LSA106Y
18
12
12
18
12
10
12
10
7
10
8
.01
.02
.03
.03
.06
.07
.10
.15
.22
.23
.34
12.4
24.7
37.1
37.1
74.1
86.5
124.
185
272.
284.
420
.02
.04
.07
.07
.13
.15
.21
.30
.44
.46
.69
12.4
24.7
43.2
43.2
80.3
92.6
130.
185.
272.
284.
426.
.04
.08
.13
.14
.26
.30
.41
.57
.84
.89
1.3
12.4
24.7
40.1
43.2
80.3
92.6
127.
176.
259.
275.
401.
.07
.13
.20
.21
.39
.44
.61
.83
1.2
1.3
1.8
.25
.45
.63
.76
1.3
1.4
2.0
2.6
3.8
4.3
5.7
12.9
23.2
32.4
39.1
66.9
72.1
103
134
196
221
293
.35
.62
.95
1.0
1.8
2.0
2.8
3.6
5.1
5.9
7.8
LSA107Y
LSA118Y
HLSK104Y
HLSK105YA
LSA122Y
HLSK106Y
HLSK107Y
HLSK118Y
HLSK122Y
6
6
10
7
5
8
6
6
5
.46
.46
.45
.67
.83
1.0
1.3
1.3
2.4
568.
568
556.
828.
1025.
1235.
1606.
1606
2965.
.90
.90
.90
1.3
1.6
2.0
2.7
2.7
4.9
556.
556
556.
803.
988.
1235.
1668.
1668
3026
525.
525
525.
772.
926.
1204.
1575.
1575
2810.
2.4
2.4
2.5
3.6
4.3
5.6
7.3
7.3
13.1
7.4
7.4
7.9
11.0
12.0
17.0
22.0
22.0
38.0
381
381
407
566
618
875
1132
1132
1956
10.0
10.0
11.1
15.0
17.0
23.0
33.0
33.0
51.0
1.7
1.7
1.7
2.5
3.0
3.9
5.1
5.1
9.1
14.4
26.8
41.2
43.2
80.3
90.6
126
171
247
268
371
494
494
515
741
885
1153
1503
1503
2697
.14
.25
.38
.42
.75
.80
1.0
1.5
2.2
2.4
3.3
4.3
4.3
4.5
6.5
7.5
10.0
13.0
13.0
23.01
14.4
25.7
39.1
43.2
77.2
82.4
103
154
226
247
340
443
443
463
669
772
1029
1338
1338
2378
.20
.35
.54
.59
1.0
1.1
1.6
2.0
3.0
3.4
4.5
5.9
5.9
6.1
9.0
10.0
13.0
17.0
17.0
30.0
13.7
24.0
37.1
40.5
68.6
75.5
110
137
206
233
309
405
405
419
618
686
892
1167
1167
2059
12.0
21.3
32.6
34.3
61.8
68.6
96.1
124
175
202
268
343
343
381
515
583
789
1132
1132
1750
C
Steel Spiral Bevel Gears** (2:1 Ratio)
SS-Series – Unhardened Steel
SH Series – Hardened Steel (Teeth Only)
APPROXIMATE HP & TORQUE* RATINGS FOR CLASS I SERVICE (Service Factor = 1.0)
Catalog
Number
Pitch
SS302
SH302
SS192
SS142
SH192
SS142-1
SH142
SH142-1
SS102
SS82
SH102
SH82
30
30
19
14
19
14
14
14
10
8
10
8
50 RPM†
100 RPM†
200 RPM†
HP Torque HP Torque HP Torque
.002
4.9 .004
.005
12.4 .01
.01
24.7 .02
.02
49.4 .05
.03
74.1 .05
.04
98.8 .08
.06
148
.12
.10
247
.20
.14
346
.27
.26
642
.50
.34
840
.67
.64 1581
1.3
300 RPM†
600 RPM†
HP Torque HP Torque
4.9 .008
4.9
.013
12.4 .02
12.4
.03
24.7 .04
24.7
.06
61.8 .09
55.6
.14
61.8 .10
61.8
.16
98.8 .16
98.8
.23
148
.23
142
.34
247
.39
241
.58
334
.52
321
.78
618
.99
611
1.5
828
1.3
803
2.0
1606
2.5
1544
3.7
5.4
12.4
24.7
57.6
65.9
94.7
140
239
321
618
824
1524
.025
.06
.12
.26
.31
.45
.66
1.1
1.5
2.8
3.8
7.1
5.1
12.4
24.7
53.5
63.8
92.6
136
226
309
576
782
1462
900 RPM†
1200 RPM†
1800 RPM†
HP Torque HP Torque HP Torque
.037
5.1
.05
5.1
.07
4.8
.09
12.4
.12
12.4
.18
12.4
.18
24.7
.24
24.7
.35
24.0
.39
53.5
.51
52.5
.76
52.2
.46
63.1
.60
61.8
.88
60.4
.67
92.0
.88
90.6 1.3
89.2
.98
135
1.3
134
1.9
130
1.7
233
2.2
226
3.2
220
2.2
302
2.9
299
4.3
295
4.2
576
5.5
566
8.0
549
5.6
769
7.3
751
10.7
734
10.5
1441 13.7 1410
20.0 1373
Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating.
*Torque (Lb. Ins.) Output Rating
HP (Input)
Note: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute. Use for interpolation purposes only.
**Ratings reflect Gear and Pinion sets.
†Pinion RPM
P-1930-BG
04/10
Boston Gear 800-825-6544
83
Notes
C
84
Boston Gear 800-825-6544
P-1930-BG
04/10
Worms & Worm Gears
Section Contents
CATALOG NUMBERS / DIMENSIONS .............................................................................................. 86-95
SELECTION PROCEDURE ....................................................................................................................... 96
HORSEPOWER & TORQUE RATINGS............................................................................................... 97-98
CENTER DISTANCES & RATIOS AVAILABLE ........................................................................................ 98
STOCK ALTERED / CUSTOM WORM AND WORM GEARS ............................................................... 3-5
WORM/WORM GEAR ENGINEERING INFORMATION................................................................ 310-311
D
P-1930-BG
04/10
Boston Gear 800-825-6544
85
Worms & Worm Gears
48 Diametral Pitch (Bronze Worm Gears, Steel Worms – Unhardened & Hardened,
Acetal Worm Gears & Worms)
Pressure Angle – Single thread 14-1/2° – Double thread 20° – Quad thread 25°
RATIO = Gear Teeth ÷ Worm Threads
All Worms and Worm Gears stocked RIGHT HAND ONLY.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
48
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
HUB
PROJ.
FACE
HUB
DIA.
BORE
*
PITCH
DIA.
20
30
40
50
.417
.625
.187
.833
1.042
.34
.44
20
.417 .125
.125
.625
.188
.188
.833
.250
.188
1.042
.250
.34
.19
.44
.25
.50
.25
.50
.25
.417
.34
.625
.44
.833 .1875 .50
1.042
.50
1.250
.62
1.667
.62
.250
2.083
.69
.19
30
40
50
STANDARD TOLERANCES
DIMENSION
Bronze
and Steel
BORE
Acetal
Acetal with
Brass Insert
TOLERANCE
All
±.0005
All
+.001 –.002
All
+.001 –.000
20
30
40
50
60
80
100
FACE = .156"
*CENTER LINE WORM TO
FLUSH END = .078"
WORM
GEARS
.50
.19
.25
SINGLE Thread
DOUBLE Thread
Catalog
Item Catalog Item
Number
Code Number Code
ACETAL**
QUAD Thread
Catalog
Item
Number
Code
GP1018
54106
–
GP1019
54107
–
GP1020
54108
–
GP1021
54109
–
ACETAL WITH BRASS INSERTS**
–
–
–
–
–
–
–
–
–
–
–
–
GP1018-1/8
54118
GP1019-1/8
54119
GP1019-3/16 54120
GP1020-3/16 54121
GP1020-1/4
54122
GP1021-3/16 54123
GP1021-1/4
54124
BRONZE
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
D1118
D1119
D1120
D1121
D1124
D1122
D1123
13488
13490
13492
13494
13500
13496
13498
Q1318
Q1319
Q1320
Q1321
Q1324
Q1322
Q1323
13440
13442
13444
13446
13452
13448
13450
.25
.31
B
B
A
B
G1018
G1019
G1020
G1021
G1024
G1022
G1023
13564
13566
13568
13570
13572
13574
13576
D
WORM LEAD and LEAD ANGLE
LEAD
LEAD
ANGLE
SINGLE
.0654"
DOUBLE
.1309"
QUAD
.2618"
3°35´
7°7´
14°2´
FACE
PITCH
DIA.
BORE
REFERENCE PAGES
HUB
PROJ.
HUB
DIA.
48
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
Hub
SINGLE Thread
Catalog
Item
Number
Code
ACETAL
DOUBLE Thread
Catalog
Item
Number
Code
QUAD Thread
Catalog
Item
Number
Code
Pitch
Dia. Face
Bore
Dia.
Proj.
.333
.562
.187
.26
.19
LSHP
54141
–
UNHARDENED – STEEL
.333
.562
.1875
.26
.19
LSH-1
12920
DSH-1
HARDENED – STEEL
12928
QSH-1
12934
.333
.562
.1875
.26
.19
HLSH-1
GLSH-1
13052
13036
HQSH-1
GQSH-1
13062
13042
13026
12952
HDSH-1
GDSH-1
–
–
–
All Steel worms have .0625 drilled hole in hub.
Hxxx worms have polished threads.
Gxxx worms have ground and polished threads.
Alterations — 314
Lubrication — 314
Materials — 315
86
Boston Gear 800-825-6544
P-1930-BG
04/10
Worms & Worm Gears
32 Diametral Pitch (Bronze Worm Gears, Steel Worms – Unhardened & Hardened,
Acetal Worm Gears & Worms)
Pressure Angle – Single thread 14-1/2° – Double thread 20° – Quad thread 25°
RATIO = Gear Teeth ÷ Worm Threads
All Worms and Worm Gears stocked RIGHT HAND ONLY.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
32
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
20
30
40
50
.625
.187
.938
1.250
.250
1.562
20
.625
30
.938
40
1.250
50
1.562
20
30
40
50
60
80
96
100
.188
.250
.188
.250
.250
.313
.250
.3125
FACE = .219"
*CENTER LINE WORM TO
FLUSH END = .109"
WORM
GEARS
.50
.63
.63
.63
.25
.31
.50
.25
.63
.25
.63
.31
.63
.31
GP1026
54110
–
GP1027
54111
–
B
GP1028
54112
–
GP1029
54113
–
ACETAL WITH BRASS INSERTS**
–
–
–
–
–
–
–
–
–
–
–
–
GP1026-3/16 54125
GP1026-1/4
54126
GP1027-3/16 54127
GP1027-1/4
54128
GP1028-1/4
54129
GP1028-5/16 54130
GP1029-1/4
54131
GP1029-5/16 54132
BRONZE
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
D1126
D1127
D1128
D1129
D1132
D1130
–
D1133
13502
13504
13506
13508
13514
13510
–
13516
Q1326
Q1327
Q1328
Q1329
Q1332
Q1330
Q1331
–
13454
13456
13458
13460
13466
13462
13464
–
B
.625
.50
.1875
.938
.62
1.250
.62
1.562 .250 .62
1.875
.69
2.500
3.000 .3125 .69
3.125
SINGLE Thread
DOUBLE Thread
QUAD Thread
Catalog
Item Catalog Item
Catalog
Item
Number
Code Number Code Number
Code
ACETAL**
.25
A
.31
.31
D
G1026
G1027
G1028
G1029
G1032
G1030
G1031
G1033
13578
13580
13582
13584
13586
13588
13590
13592
HUB
PROJ.
FACE
HUB
DIA.
BORE
*
PITCH
DIA.
STANDARD TOLERANCES
DIMENSION
Bronze
and Steel
BORE
Acetal
Acetal with
Brass Insert
TOLERANCE
All
±.0005
All
+.001 –.002
All
+.001 –.000
D
WORM LEAD and LEAD ANGLE
32
LEAD
LEAD
ANGLE
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
Hub
SINGLE Thread
Catalog
Item
Number
Code
ACETAL
DOUBLE Thread
Catalog
Item
Number
Code
Bore
Dia.
Proj.
.438
.641
.187
.32
.19
LTHBP
54142
–
UNHARDENED – STEEL
–
.438
.688
.1875
.32
.19
LTHB-1
12922
DTH-1
HARDENED – STEEL
12930
QTH-1
12936
.438
.688
.2187
.32
.19
HLTH-1
GLTH-1
13054
13038
HQTH-1
GQTH-1
13064
13044
04/10
QUAD
.3927"
4°5´
8°8´
15°57´
FACE
HDTH-1
GDTH-1
–
–
All Steel worms have .0625 drilled hole in hub.
Hxxx worms have polished threads.
Gxxx worms have ground and polished threads.
**These are in effect Helical Gears with a Helix Angle compatible with the worms. When in mesh they
operate as a worm pair at right angles. Face Width is 3/16".
P-1930-BG
DOUBLE
.1963"
QUAD Thread
Catalog
Item
Number
Code
Pitch
Dia. Face
13028
12954
SINGLE
.0982"
PITCH
DIA.
BORE
HUB
PROJ.
HUB
DIA.
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
Boston Gear 800-825-6544
87
Worms & Worm Gears
24 Diametral Pitch (Bronze Worm Gears, Steel Worms – Unhardened & Hardened,
Minlon® Worm Gears – Nylon Worms)
Pressure Angle – Single thread 14-1/2° – Double thread 20° – Quad thread 25°
RATIO = Gear Teeth ÷ Worm Threads
All Worms and Worm Gears stocked RIGHT HAND ONLY.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
24
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
HUB
DIA.
BORE
*
PITCH
DIA.
20
30
40
50
20
30
40
50
STANDARD TOLERANCES
DIMENSION
Bronze
and Steel
BORE Minlon/Nylon
Minlon/Nylon
w/Brass Insert
D
SINGLE Thread
DOUBLE Thread
QUAD Thread
Catalog
Item Catalog Item
Catalog
Item
Number
Code Number Code Number
Code
MINLON**
HUB
PROJ.
FACE
FACE = .250"
*CENTER LINE WORM TO
FLUSH END = .125"
WORM
GEARS
TOLERANCE
All
±.0005
All
+.001 –.002
All
+.001 –.000
20
30
40
50
60
72
80
96
100
.833
.187 .63
1.250
1.667
.3125 .75
2.083
.1875
.250
.63
.1875
1.250
.250
.250
1.667
.3125
.75
.250
2.083
.3125
.31
GP1034
54114
–
GP1035
54115
–
B
GP1036
54116
–
GP1037
54117
–
MINLON WITH BRASS INSERTS**
–
–
–
–
–
–
–
–
–
–
–
–
GP1034-3/16 54133
GP1034-1/4
54134
GP1035-3/16 54135
GP1035-1/4
54136
GP1036-1/4
54137
GP1036-5/16 54138
GP1037-1/4
54139
GP1037-5/16 54140
BRONZE
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
D1134
D1135
D1136
D1137
D1140
D1138
D1141
D1139
D1149
13518
13520
13522
13524
13530
13526
13532
13528
13534
Q1334
Q1335
Q1336
Q1337
Q1340
Q1338
Q1341
–
–
13470
13472
13474
13476
13482
13478
13484
–
–
.833
.833
1.250
1.667
2.083
2.500
3.000
3.333
4.000
4.167
.31
.1875 .62
.31
.250
.62
.31
.75
.31
.88
.38
.88
.38
.3125
.375
B
A
B
C
D
G1034
G1035
G1036
G1037
G1040
G1038
G1041
G1039
G1049
13594
13596
13598
13600
13602
13604
13606
13608
13610
WORM LEAD and LEAD ANGLE
LEAD
LEAD
ANGLE
SINGLE
.1309"
DOUBLE
.2618"
QUAD
.5236"
4°46´
9°28´
18°26´
24
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
FACE
PITCH
DIA.
BORE
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
88
Boston Gear 800-825-6544
Hub
HUB
PROJ.
Pitch
Dia. Face
Bore
Dia.
Proj.
HUB
DIA.
.500
.643
.187
.38
.25
.500
.812
.1875
.38
.25
.500
.812
.25
.38
.25
SINGLE Thread
Catalog
Item
Number
Code
NYLON
DOUBLE Thread
Catalog
Item
Number
Code
LUHBP
54143
–
UNHARDENED – STEEL
QUAD Thread
Catalog
Item
Number
Code
–
–
–
LUHB
12924
DUH
HARDENED – STEEL
12932
QUH
12938
HLUH
GLUH
13056
13040
HQUH
GQUH
13066
13060
13030
12956
HDUH
GDUH
All Steel worms have .0938 drilled hole in hub.
Hxxx worms have polished threads.
Gxxx worms have ground and polished threads.
MINLON® is a registered trademark of E.I. DuPont.
** These are in effect Helical Gears with a Helix Angle compatible with the worms. When in mesh they
operate as a worm pair at right angles.
P-1930-BG
04/10
Worms & Worm Gears
16 Diametral Pitch (Bronze & Cast Iron Worm Gears,
Steel Worms – Unhardened & Hardened)
Pressure Angle – Single thread 14-1/2° – Double thread 14-1/2° – Quad thread 25°
RATIO = Gear Teeth ÷ Worm Threads
All Worms and Worm Gears stocked RIGHT HAND ONLY.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
16
FACE = .313"
*CENTER LINE WORM TO
FLUSH END = .156"
WORM
GEARS
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
SINGLE Thread
DOUBLE Thread
Catalog
Item Catalog Item
Number
Code Number Code
QUAD Thread
Catalog
Item
Number
Code
BRONZE
20
30
40
50
60
80
100
1.250 .250
1.875
.3125
2.500
3.125
3.750
.375
5.000
6.250
20
30
40
50
60
80
100
1.250 .250
1.875
.3125
2.500
3.125
3.750
.375
5.000
6.250
.62
.31
.75
.38
.88
.44
1.00
.50
.62
.31
.75
.38
.88
.44
1.00
.50
A
B
C
D
A
B
C
CG1042
CG1043
CG1044
CG1045
CG1048
CG1046
CG1047
HUB
PROJ.
FACE
G1042
13612
G1043
13614
G1044
13616
G1045
13618
G1048
13620
G1046
13622
G1047
13624
CAST IRON
63506
63507
63508
63509
63510
63511
63512
D1142
D1143
D1144
D1145
D1148
–
–
13700
13702
13704
13706
13708
–
–
Q1342
Q1343
Q1344
Q1345
Q1348
Q1346
–
13536
13538
13540
13542
13544
13546
–
CD1142
CD1143
CD1144
CD1145
CD1148
–
–
63513
63514
63515
63516
63517
–
–
CQ1342
CQ1343
CQ1344
CQ1345
CQ1348
CQ1346
–
63518
63519
63520
63521
63522
63523
–
BORE
*
HUB
DIA.
PITCH
DIA.
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
WORM LEAD and LEAD ANGLE
LEAD
LEAD
ANGLE
16
SINGLE
.1963"
DOUBLE
.3927"
QUAD
.7854"
5°43´
11°19´
21°48´
D
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
Hub
Pitch
Dia. Face
Bore
Dia.
Proj.
.625
1.00
.250
.44
.25
.625
1.00
.3125
.44
.25
SINGLE Thread
DOUBLE Thread
Catalog
Item
Catalog
Item
Number
Code
Number
Code
UNHARDENED – STEEL
QUAD Thread
Catalog
Item
Number
Code
LVHB-1
12926
DVH-1
HARDENED – STEEL
12862
QVH-1
12940
HLVH-1
GLVH-1
13004
12950
HQVH-1
GQVH-1
13058
13046
13032
12958
HDVH-1
GDVH-1
FACE
PITCH
DIA.
BORE
HUB
PROJ.
HUB
DIA.
All worms have .0938 drilled hole in hub.
Hxxx worms have polished threads.
Gxxx worms have ground and polished threads.
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
P-1930-BG
04/10
Boston Gear 800-825-6544
89
Worms & Worm Gears
12 Diametral Pitch (Bronze & Cast Iron Worm Gears,
Steel Worms – Unhardened & Hardened)
RATIO = Gear Teeth ÷ Worm Threads
RH = RIGHT HAND — LH = LEFT HAND
All others stocked RIGHT HAND ONLY.
Pressure Angle – 14-1/2°
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
12
FACE = .500"
*CENTER LINE WORM TO
FLUSH END = .250"
WORM
GEARS
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
SINGLE Thread
Catalog
Item
Number Code
DOUBLE Thread
Catalog
Item
Number
Code
QUAD Thread
Catalog
Item
Number
Code
–
–
DB1400
–
DB1401A
–
DB1402A
–
DB1403A
–
DB1260A
–
–
–
–
13714
–
13716
–
13718
–
13720
–
13722
–
–
QB1212†
QB1216†
DB1600
–
DB1601A
–
DB1602A
–
DB1603A
–
QB1260A
–
–
13762
13764
13766
–
13768
–
13770
–
13772
–
13774
–
–
13260
13262
D1600
13352
BRONZE
12
16
20
1.000 .5625 1.00
1.333 .6875 1.25
1.667 .500 1.25
.500
2.500
1.19
.750
.625
3.333
1.44
.750
.625
4.167
1.44
.750
.625
5.000
1.69
.750
6.667 .625 1.94
8.333 .750 1.94
.62
.62
.50
.62
.62
.62
.62
.62
.62
.62
.62
.75
.75
20
1.667 .500
.50
30
2.500
30
40
50
HUB
PROJ.
FACE
60
80
100
HUB
DIA.
BORE
*
PITCH
DIA.
1.25
.500
DIMENSION
BORE
All
WORM LEAD and LEAD ANGLE
D
LEAD
LEAD
ANGLE
.62
1.44
SINGLE
.2618"
DOUBLE
.5236"
QUAD
1.0472"
4°46´
9°28´
18°26´
.62
.625
50
4.167
B
.62
1.44
.750
.625
60
5.000
80
.750
.625
6.667
.750
8.333 .750
100
A
.62
.750
TOLERANCE
±.0005
C
.62
.625
3.333
STANDARD TOLERANCES
B
1.19
.750
40
A
.62
1.69
.75
1.94
.75
1.94
.75
C
–
–
–
–
GB1050A
13626
GB1051
13628
–
–
GB1052A
13630
–
–
GB1053A
13632
–
–
GB1260A
13634
–
–
GB1054
13636
GB1055
13638
CAST IRON
G1050ARH
G1050ALH
G1051RH
G1051LH
13110 D1400RH
13112 D1400LH
13114
–
13116
D1401ARH
–
–
D1401ALH
G1052ARH 13118
–
G1052ALH 13120
D1402ARH
–
–
D1402ALH
G1053ARH 13122
–
G1053ALH 13124
D1403ARH
–
–
D1403ALH
G1260RH
13126
–
G1260LH
13128
–
–
D1260A
G1054
13130
–
–
–
D1404
G1055
13134
–
12
–
–
–
13264
13266
D1601A
13354
–
–
–
13268
13270
D1602A
13356
–
–
–
13272
13274
D1603A
13358
–
–
–
13276
–
13278
–
Q1260A
–
–
–
13360
–
–
–
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
FACE
PITCH
DIA.
BORE
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 97, 98
Lubrication — 314
Materials — 315
Selection Procedure — 96
90
Boston Gear 800-825-6544
HUB
PROJ.
HUB
DIA.
Hub
Pitch
Dia. Face
Bore
Dia.
Proj.
1.125
.625
–
–
1.000 1.625
.625
.500
–
–
–
–
1.125
.500
.75
.38
1.125
.625
–
–
1.000 1.625
.625
.500
–
–
–
–
1.125
.500
–
–
SINGLE Thread
DOUBLE Thread
Catalog
Item
Catalog
Item
Number
Code
Number
Code
UNHARDENED – STEEL
D1407KRH‡
D1407KLH‡
–
–
L1407‡
L1056‡
12900
–
GH1056RH 12884 DH1407RH
GH1056LH 12886 DH1407LH
HARDENED – STEEL
–
–
–
HL1056‡
H1056RH‡
H1056LH‡
–
H1407RH‡
H1407LH‡
–
HL1407‡
13006
–
12962
–
12960
–
–
QUAD Thread
Catalog
Item
Number
Code
12806
12808
12912
–
12838
12840
D1607KRH‡ 12822
D1607KLH‡ 12824
–
–
–
–
DH1607
12854
–
–
12980
12982
13018
–
–
–
H1607‡
–
–
–
–
–
12996
–
–
–
–
–
†.750" Face, Center Line Worm to Flush End = .375"
‡Furnished with .125" Keyway.
Hardened Worms have ground and polished threads.
P-1930-BG
04/10
Worms & Worm Gears
10 Diametral Pitch (Bronze & Cast Iron Worm Gears,
Steel Worms – Unhardened & Hardened)
RATIO = Gear Teeth ÷ Worm Threads
RH = RIGHT HAND — LH = LEFT HAND
All others stocked RIGHT HAND ONLY.
Pressure Angle – 14-1/2°
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
10
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
16
20
30
40
50
60
80
100
1.600 .750
.500
2.000
.875
.625
3.000
.875
.625
4.000
.875
.750
5.000
.875
.750
6.000
.875
8.000 .750
10.000 .750
1.50
1.25
1.62
.75
A
.62
1.69
.62
1.69
.62
1.94
.75
1.94
.75
1.94
2.00
.75
.75
B
C
.500 1.25
20
2.000
.62
A
.875 1.62
3.000
.62
–
.62
B
.875 1.69
5.000
.75
.875 1.94
60
80
100
6.000
.750 1.94
.875
.750
8.000
.875
.750
10.000
.875
1.94
1.94
1.94
1.94
1.94
–
G1063RH
G1063LH
.750 1.94
50
–
–
G1062ARH 13144
G1062ALH 13146
.625 1.69
4.000
BRONZE
–
–
GB1060A
13640
–
–
GB1061A
13648
–
–
GB1062A
13642
–
–
GB1063
13644
–
–
GB1064
13646
–
–
GB1067
13650
GB1065
13652
CAST IRON
G1060ARH 13136
G1060ALH 13138
–
.875 1.69
40
SINGLE Thread
Catalog
Item
Number Code
G1061ARH 13142
G1061ALH 13140
.625 1.69
30
FACE = .625"
*CENTER LINE WORM TO
FLUSH END = .312"
WORM
GEARS
–
.75
.75
C
.75
G1064RH
G1064LH
–
G1067
–
G1065
–
10
–
13148
13150
–
DOUBLE Thread
Catalog
Item
Number
Code
QUAD Thread
Catalog
Item
Number
Code
–
–
DB1410
–
DB1411
–
DB1412
–
DB1413A
–
DB1414A
–
–
QB1016†
–
DB1610
–
DB1611
–
DB1612
–
DB1613A
–
–
–
–
–
–
13728
–
13736
–
13730
–
13732
–
13734
–
–
–
–
D1410RH
D1410LH
13282
13284
–
D1411RH
D1411LH
–
13286
13288
–
–
D1412RH
D1412LH
13290
13292
–
–
D1413ARH 13294
D1413ALH 13296
13152
–
13154
–
D1414A
13156
–
–
D1080A
13158
–
–
D1415A
–
D1610
–
D1611
–
D1612
13780
–
13782
–
13788
–
13784
–
13786
–
–
–
–
–
HUB
PROJ.
FACE
HUB
DIA.
BORE
*
PITCH
DIA.
13366
–
13368
–
STANDARD TOLERANCES
13370
–
–
D1613A
13372
–
–
–
13298
–
13300
–
13302
D1614A
–
Q1080A
–
–
13374
–
13376
–
–
WORMS FOR ABOVE GEARS
DIMENSION
BORE
All
TOLERANCE
±.0005
WORM LEAD and LEAD ANGLE
LEAD
LEAD
ANGLE
SINGLE
.3142"
DOUBLE
.6283"
QUAD
1.2566"
4°34´
9°5´
17°45´
D
DIAMETRAL PITCH
Hub
Pitch
Dia. Face
Bore
Dia.
Proj.
1.375
.750
–
–
2.000
.750
.625
–
–
–
–
–
–
1.375
.625
1.250
.97
.50
1.375
.750
–
–
1.250 2.000
.750
.625
–
–
–
–
1.375
.625
–
–
SINGLE Thread
DOUBLE Thread
Catalog
Item
Catalog
Item
Number
Code
Number
Code
UNHARDENED – STEEL
–
–
D1418KRH‡
–
–
D1418KLH‡
–
–
L1418‡
12902
–
L1066‡
G1066KRH‡ 12864
–
G1066KLH‡ 12866
GH1066RH 12888 DH1418RH
GH1066LH 12890 DH1418LH
HARDENED STEEL
–
–
–
HL1066‡
H1066RH‡
H1066LH‡
†.875" Face, Center Line Worm to Flush End = .438"
‡Furnished with 3/16" Keyway.
Hardened Worms have ground and polished threads.
P-1930-BG
04/10
–
H1418RH‡
–
H1418LH‡
–
HL1418‡
13008
–
12966
–
12964
12810
12812
12914
–
–
QUAD Thread
Catalog
Item
Number
Code
FACE
D1618KRH‡ 12826
D1618KLH‡ 12828
–
–
–
–
–
DH1618
–
12856
–
12986
12984
13020
–
H1618‡
–
–
–
12998
–
–
–
–
BORE
HUB
DIA.
–
12842
12844
–
PITCH
DIA.
HUB
PROJ.
–
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 97, 98
Lubrication — 314
Materials — 315
Selection Procedure — 96
Boston Gear 800-825-6544
91
Worms & Worm Gears
8 Diametral Pitch (Bronze & Cast Iron Worm Gears,
Steel Worms – Unhardened & Hardened)
RATIO = Gear Teeth ÷ Worm Threads
RH = RIGHT HAND — LH = LEFT HAND
All others stocked RIGHT HAND ONLY.
Pressure Angle – 14-1/2°
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
8
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
8
12
16
20
30
40
48
50
60
80
100
HUB
PROJ.
FACE
HUB
DIA.
BORE
*
1.000 .500
1.500 .750
2.000 1.000
.750
2.500
1.000
.750
3.750
1.000
5.000 1.000
6.000 1.000
6.250 1.000
7.500 1.000
10.000 1.250
12.500 1.250
PITCH
DIA.
1.12 .88
1.50 .88
2.00 .88
1.75 .75
1.75 .75
1.69 .75
1.69 .75
2.19 .75
2.38 .88
2.31 .88
2.44 .88
2.75 .88
3.00 1.00
.750 1.75
20
TOLERANCE
±.0005
.75
48
6.000 1.000 2.38
.88
50
6.250 1.000 2.31
.88
96
100
–
.75
.75
80
BRONZE
–
–
–
–
–
–
GB1070
13654
–
–
GB1071
13656
–
–
GB1072A
13658
GB1073
13660
GB850RH 13662
GB860
13664
GB1074A
13666
GB8100
13668
CAST IRON
G1070RH
13160
G1070LH
13162
–
G1071RH
G1071LH
.75
5.000 1.000 1.69
7.500 1.000
1.000
10.000
1.250
12.000 1.250
12.500 1.250
SINGLE Thread
Catalog
Item
Number Code
.75
40
60
C
D
C
3.750
1.000 1.69
DIMENSION
BORE
All
B
A
.750 1.69
STANDARD TOLERANCES
A
2.500
1.000 1.75
30
FACE = .750"
*CENTER LINE WORM TO
FLUSH END = .375"
WORM
GEARS
B
2.44 .88
2.69 .88
2.69 .88
3.00 1.00
2.69 1.00
C
D
D
C
C
13164
13166
–
–
G1072ARH
G1072ALH
G1073RH
G1073LH
G850RH
G850LH
G860
–
G1074ARH
G1075
G8100A
13168
13170
13174
13172
13176
13178
13180
–
13182
13186
13188
DOUBLE Thread
Catalog
Item
Number
Code
QUAD Thread
Catalog
Item
Number
Code
–
–
–
–
DB1420A
–
DB1421A
DB1422
–
DB1423A
DB860A
–
–
–
–
–
–
13740
–
13742
13744
–
13746
13748
–
–
QB808†
QB812†
QB816†
–
DB1620A
–
DB1621A
DB1622
–
DB1623A
–
–
–
13790
13792
13794
–
13796
–
13798
13800
–
13802
–
–
–
–
–
–
–
D1620A
13380
–
–
D1621A
13382
D1622A
13384
D1420ARH 13304
D1420ALH 13306
–
–
D1421ARH
D1421ALH
D1422ARH
D1422ALH
13308
13310
13312
13314
–
–
–
–
D1423A
13316
D1623A
13386
D860A
D1424A
–
–
–
13320
13322
–
–
–
Q860A
D1624A
–
–
–
13388
13390
–
–
–
WORM LEAD and LEAD ANGLE
D
LEAD
LEAD
ANGLE
SINGLE
.3927"
DOUBLE
.7854"
1.5708"
QUAD
4°46´
9°28´
18°26´
8
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
FACE
PITCH
DIA.
BORE
HUB
PROJ.
Hub
Pitch
Dia. Face
Bore
Dia.
Proj.
1.750
.875
–
–
2.500
.875
.750
–
–
–
–
.750
–
–
.750
1.18
.62
1.750
.875
–
–
1.500 2.500
.875
.750
–
–
–
–
1.750
.750
–
–
HUB
DIA.
1.500
1.750
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 97, 98
Lubrication — 314
Materials — 315
Selection Procedure — 96
SINGLE Thread
DOUBLE Thread
Catalog
Item
Catalog
Item
Number
Code
Number
Code
UNHARDENED – STEEL
QUAD Thread
Catalog
Item
Number
Code
D1427KRH‡ 12814
D1427KLH‡ 12816
–
–
L1427‡
12916
12904
–
–
L1076‡
G1076KRH‡ 12868
–
–
G1076KLH‡ 12870
GH1076RH 12892 DH1427RH 12846
GH1076LH 12894 DH1427LH 12848
HARDENED STEEL
D1627KRH‡ 12830
D1627KLH‡ 12832
–
–
–
–
–
–
–
HL1076‡
H1076RH‡
H1076LH‡
–
H1427RH‡
H1427LH‡
–
HL1427‡
13010
–
12970
–
12968
–
12990
12988
13022
–
–
–
–
DH1627
12858
H1627‡
–
–
–
13000
–
–
–
–
–
†1.000" Face, Center Line Worm to Flush End = .500"
‡Furnished with .188" Keyway.
Hardened Worms have ground and polished threads.
92
Boston Gear 800-825-6544
P-1930-BG
04/10
Worms & Worm Gears
6 Diametral Pitch (Bronze & Cast Iron Worm Gears,
Steel Worms – Unhardened & Hardened)
Pressure Angle – 14-1/2°
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
6
DIAMETRAL PITCH
Style
No.
Hub
See
of
Pitch
Page
Teeth Dia. Bore Dia. Proj. 315
16
20
24
30
36
40
48
50
60
72
2.667 1.250
.750
3.333 1.000
1.250
.750
4.000
1.250
.875
5.000
1.250
6.000 1.000
1.000
6.667
1.250
8.000 1.250
8.333 1.250
10.000 1.250
12.000 1.250
2.38 1.00
2.00
2.00 .88
2.00
1.94
.88
2.19
.88
2.50
.88
2.44
.88
2.75
2.69
3.00
3.00
1.00
1.00
1.00
1.25
1.81
.88
A
B
C
.750
20
3.333
SINGLE Thread
Catalog
Item
Number Code
BRONZE
–
–
GB1077A
13670
–
–
–
–
GB1080A
13672
–
–
GB1081
13674
–
–
GB1082
13676
GB1078
13678
–
–
GB1083
13680
GB1079
13612
GB1087
13684
GB1084
13686
CAST IRON
G1077RH
13190
G1077LH
13192
1.000
–
4.000
1.94
.88
1.250
–
B
.875
30
5.000
2.19
.88
G1081RH
G1081LH
1.250
6.000 1.000 2.50
40
6.667
G1082RH
G1082LH
G1078RH
G1078LH
.88
1.000
2.44
.88
1.250
48
1.250
1.250
1.250
1.250
1.375
1.375
–
13202
13204
13206
13208
–
8.000 1.250 2.75 1.00
8.333
10.000
12.000
13.333
16.000
16.667
–
13198
13200
–
36
50
60
72
80
96
100
–
G1080ARH 13194
G1080ALH 13196
.750
24
FACE = 1.000"
*CENTER LINE WORM TO
FLUSH END = .500"
WORM
GEARS
2.69
2.69
2.94
3.00
3.00
3.00
B
1.00
1.00
1.00
1.00
1.00
1.00
C
D
G1083RH
G1083LH
G1079RH
G1087ARH
G1084ARH
G1088ARH
G1085ARH
G1089ARH
–
DOUBLE Thread
Catalog
Item
Number
Code
QUAD Thread
Catalog
Item
Number
Code
–
–
DB620A
–
–
DB1430A
–
DB1431A
–
–
DB1432A
–
–
–
–
–
–
13752
–
–
13754
–
13756
–
–
13758
–
–
–
–
QB616**
–
–
QB620A
–
DB1630A
–
DB1631A
–
–
DB1632A
–
–
–
–
13804
–
–
13806
–
13808
–
13810
–
–
13812
–
–
–
–
–
–
–
–
D620ARH
D620ALH
13326
13328
Q620A
13394
–
–
–
–
D1630A
13396
–
–
D1430ARH 13330
D1430ALH 13332
–
D1431ARH 13334
D1431ALH 13336
D1631A
13398
–
–
–
–
–
–
–
–
D1632A
13400
D1432ARH 13338
D1432ALH 13340
13212
–
13210
13214 D1433
13218 D660
13220 D1434
13224
–
13226
–
13228
–
6
–
–
–
–
13342
13344
13346
–
–
–
D1633
Q660
D1634
–
–
–
13402
13404
13406
–
–
–
Pitch
Dia. Face
Hub
Dia.
Proj.
2.500 1.000
–
–
1.000
.875
–
–
–
–
.875
–
–
.875
1.56
.75
2.500 1.000
–
–
2.000 3.500
1.000
.875
–
–
–
–
2.500
.875
–
–
3.500
2.000
Bore
2.500
P-1930-BG
04/10
SINGLE Thread
DOUBLE Thread
Catalog
Item
Catalog
Item
Number
Code
Number
Code
UNHARDENED – STEEL
QUAD Thread
Catalog
Item
Number
Code
D1438KRH† 12818
D1438KLH† 12820
–
–
L1438
12918
12906
–
–
L1086‡
G1086KRH‡ 12872
–
–
G1086KLH‡ 12874
GH1086RH 12896 DH1438RH 12850
GH1086LH 12898 DH1438LH 12852
HARDENED STEEL
D1638KRH† 12834
D1638KLH† 12836
–
–
–
–
–
–
–
HL1086‡
H1086RH‡
H1086LH‡
–
H1438RH†
H1438LH ‡
–
HL1438†
13012
–
12974
–
12972
–
12994
12992
13024
–
–
–
–
DH1638
12860
H1638 †
–
–
–
13002
–
–
–
–
–
HUB
DIA.
BORE
*
PITCH
DIA.
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
WORM LEAD and LEAD ANGLE
LEAD
LEAD
ANGLE
SINGLE
.5236"
DOUBLE
1.0472"
QUAD
2.0944"
4°46´
9°28´
18°26´
FACE
PITCH
DIA.
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
HUB
PROJ.
FACE
BORE
D
HUB
PROJ.
HUB
DIA.
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 97, 98
Lubrication — 314
Materials — 315
Selection Procedure — 96
RATIO = Gear Teeth ÷ Worm Threads
RH = RIGHT HAND — LH = LEFT HAND
All others stocked RIGHT HAND ONLY.
**1.250" Face, Center Line Worm to Flush End = .625"
‡Furnished with .188" Keyway.
†Furnished with .250" Keyway.
Hardened Worms have ground and polished threads.
Boston Gear 800-825-6544
93
Worms & Worm Gears
4 Diametral Pitch (Bronze & Cast Iron Worm Gears,
Steel Worms – Unhardened & Hardened)
RATIO = Gear Teeth ÷ Worm Threads
RH = RIGHT HAND — LH = LEFT HAND
All others stocked RIGHT HAND ONLY.
Pressure Angle – 14-1/2°
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
HUB
PROJ.
FACE
*CENTER LINE WORM TO FLUSH END = .750"
WORM
DIAMETRAL PITCH
GEARS
Style
No.
Hub
See
SINGLE Thread
of
Pitch
Page
Catalog
Item
Teeth Dia. Bore Dia. Proj. 315
Number Code
4
BORE
*
HUB
DIA.
PITCH
DIA.
STANDARD TOLERANCES
DIMENSION
BORE
All
TOLERANCE
±.0005
FACE = 1.500"
20
24
BRONZE
5.000
1.000 2.50 1.25
B
6.000
CAST IRON
20
5.000
1.000 2.50
24
6.000
32
8.000
1.25
40
48
64
B
1.250 3.00
10.000
12.000
1.500 3.50
16.000
D
GB1100
GB1101
13688
13690
G1100RH
G1100LH
G1101RH
G1101LH
G1102RH
G1102LH
G1103
G1104
G1105
13230
13232
13234
13236
13238
13240
13242
13244
13246
WORM LEAD and LEAD ANGLE
D
LEAD
LEAD ANGLE
.7854
4°46´
4
FACE
KEYWAY
PITCH
DIA.
Pitch
Dia. Face
BORE
3.000
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 97, 98
Lubrication — 314
Materials — 315
Selection Procedure — 96
94
WORMS FOR ABOVE GEARS
DIAMETRAL PITCH
Boston Gear 800-825-6544
SINGLE Thread
Catalog
Item
Bore Dia. Proj.
Number*
Code
UNHARDENED – STEEL
Hub
G1106KRH
G1106KLH
4.500 1.250
–
–
L1106
HARDENED STEEL
3.500 1.250
3.500 1.250
3.000 4.500
1.250
5.750
–
–
–
–
–
–
H1106
HL1106
HP1106
12876
12878
12908
12976
13014
13034
*All worms furnished with .313 keyway.
Hardened Worms have ground and polished threads.
P-1930-BG
04/10
Worms & Worm Gears
3 Diametral Pitch (Cast Iron Worm Gears, Steel Worms – Unhardened & Hardened)
Pressure Angle – 14-1/2°
RATIO = Gear Teeth ÷ Worm Threads
All Worm and Worm Gears stocked RIGHT HAND ONLY.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
*CENTER LINE WORM TO FLUSH END = 1.000"
WORM
DIAMETRAL PITCH
GEARS
Style
No.
Hub
See
SINGLE Thread
of
Pitch
Page Catalog
Item
Teeth Dia. Bore Dia. Proj. 315
Number
Code
18
6.000 1.000 3.00 1.50
G1110
13248
24
8.000
G1111
13250
B
30 10.000
3.50
G1112
13252
36 12.000 1.500
1.50
G1113
13254
48 16.000
C
G1114
13256
4.00
54 18.000
G1115
13258
D
3
FACE = 2.000"
WORMS FOR ABOVE GEARS †
DIAMETRAL PITCH
SINGLE Thread
Hub
Pitch
Catalog
Item
Dia. Face Bore Dia. Proj. Number
Code
UNHARDENED – STEEL
4.000
BORE
*
4.000
G1116KRH
1.500
–
–
5.500
L1116
HARDENED STEEL
12880
12910
4.000
1.500
5.500
12978
13016
–
–
H1116
HL1116
HUB
DIA.
PITCH
DIA.
STANDARD TOLERANCES
DIMENSION
BORE
All
3
4.000
HUB
PROJ.
FACE
TOLERANCE
±.0005
WORM LEAD and LEAD ANGLE
LEAD
LEAD ANGLE
1.0472"
4°46'
D
FACE
†All worms furnished with .375" keyway.
Hardened Worms have ground and polished threads.
KEYWAY
PITCH
DIA.
BORE
REFERENCE PAGES
Alterations — 314
Horsepower Ratings — 97, 98
Lubrication — 314
Materials — 315
Selection Procedure — 96
P-1930-BG
04/10
Boston Gear 800-825-6544
95
Worms & Worm Gears
Boston worms and worm gears provide an effective answer for such power
transmission applications as high-ratio speed reduction, limited space, right-angle
shafts and non-intersecting shafts. When properly applied, they are the smoothest
and quietest form of gearing. Steel worms and cast iron or bronze worm gears are
available in single, double or quadruple threads, 48 to 3 diametral pitch.
Acetal worms and worm gears are available in single thread, 48 to 24
diametral pitch.
Selection Procedure
Approximate input horsepower and output torque ratings for
Boston stock worm and worm gear combinations from 12 to
3 DP are listed on Pages 97, 98. These ratings are for
hardened, ground and polished worms operating with bronze
worm gears. For other combinations multiply the listed ratings
by the following percentages:
Hardened, ground and polished steel worms with cast iron
gears 50%. Unhardened steel worms with cast iron gears
25%.
1. Determine service factor.
a. Using Application Classification Chart I, pages 323, 324,
determine service factor or
b. With knowledge of operating conditions and load
classification, select service factor from Table 1.
2. Determine Design Horsepower.
Design HP = Application Load x Service Factor (Table 1)
3. Select worm gear set with horsepower capacity equal to [or
greater than] design horsepower determined in Step 2.
These ratings are listed at selected worm speeds. Ratings for
intermediate speeds can be interpolated from the values
indicated.
These ratings are based on gears operating with a Service
Factor of 1.0, properly mounted in accordance with good
design practice and continuously lubricated with a sufficient
supply of oil.
D
TABLE 1
Service
Factor
0.8
1.0
1.25
1.50
1.75
2.0
Operating Conditions
Uniform—not more than 15 minutes in 2 hours.
Moderate Shock—not more than 15 minutes in 2 hours.
Uniform—not more than 10 hours per day.
Moderate Shock—not more than 10 hours per day.
Uniform—more than 10 hours per day.
Heavy Shock—not more than 15 minutes in 2 hours.
Moderate Shock—more than 10 hours per day.
Heavy Shock—not more than 10 hours per day.
Heavy Shock—more than 10 hours per day.
Heavy shock loads and/or severe wear conditions may require the use of higher
service factors. Consultation with factory is recommended in these
applications.
96
Boston Gear 800-825-6544
P-1930-BG
04/10
Worms & Worm Gears
Steel-Hardened, Ground & Polished Worms
Bronze Worm Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
Worm RPM
Center
Ratio
Distance
3
1.000
1.500
1.167
1.425
4
1.750
2.333
1.333
1.625
5
2.000
2.667
6
3.000
1.750
2.125
7.5
2.625
3.500
1.333
1.625
2.000
2.167
10
2.667
2.625
3.250
4.333
12
3.000
2.583
12.5
3.125
3.875
1.750
2.125
15
2.625
3.000
3.500
18
5.000†
1.333
1.625
2.000
2.167
20
2.667
2.625
3.250
4.000
4.333
3.000
24
6.000†
4.500
2.583
3.125
25
3.875
5.167
1.750
2.125
2.625
3.000
30
3.500
3.625
4.500
7.000†
32
5.500
4.000
36
8.000†
Input
HP
.52
1.19
.78
1.11
1.77
3.01
.68
1.03
1.73
3.92
3.82
1.04
1.59
2.65
4.80
.44
.67
1.05
1.39
2.01
2.11
3.54
6.43
2.39
1.72
2.61
4.40
.64
.98
1.54
2.04
2.94
2.27
.28
.42
.65
.83
1.22
1.25
1.98
2.92
3.77
1.42
3.23
3.41
.99
1.50
2.39
2.27
.40
.59
.90
1.15
1.69
1.74
2.75
4.23
2.13
1.95
3.87
1800
Output
Torque
50
109
99
142
216
392
109
165
264
639
746
247
381
607
1174
130
196
318
441
616
672
1082
2094
882
683
1042
1681
284
436
699
966
1355
1308
140
217
343
483
665
742
1191
1667
2318
933
2218
2336
726
1112
1794
1738
294
452
725
1008
1386
1544
2489
3326
1955
1915
3990
Input
HP
.27
.66
.40
.61
.98
1.84
.34
.57
.96
2.40
2.34
.53
.87
1.47
2.94
.23
.38
.63
.71
1.26
1.16
1.96
3.94
1.50
.87
1.44
2.44
.33
.55
.92
1.03
1.84
1.38
.15
.25
.41
.43
.80
.71
1.18
1.99
2.36
.93
1.81
2.32
.52
.85
1.43
1.42
.21
.35
.57
.60
1.12
.98
1.65
2.53
1.46
1.29
1.33
600
Output
Torque
72
183
143
223
361
689
158
257
441
1124
1317
355
599
1016
2064
189
305
525
641
1071
1061
1806
3685
1537
985
1641
2810
410
678
1150
1402
2364
2373
210
336
567
693
1156
1156
1974
3025
4034
1613
4020
4235
1048
1730
2962
3028
410
693
1197
1450
2426
2395
4128
6002
3546
3366
4130
Input
HP
.06
.15
.08
.13
.22
.45
.07
.12
.22
.59
.57
.11
.19
.33
.72
.05
.09
.15
.15
.32
.25
.44
.96
.38
.18
.31
.55
.07
.13
.22
.22
.47
.41
.04
.06
.10
.09
.22
.16
.28
.64
.60
.26
.53
.75
.11
.19
.34
.36
.05
.09
.13
.13
.31
.22
.39
.76
.47
.36
.68
100
Output
Torque
83
227
166
267
454
933
180
309
551
1512
1777
411
714
1276
2789
208
366
649
756
1450
1267
2270
4980
2042
1134
1961
3466
463
804
1428
1617
3120
4198
227
391
706
794
1550
1374
2433
4663
5420
2163
7109
6504
1197
2048
3671
4018
473
831
1286
1663
3233
2836
5105
10683
5445
4470
12816
Worm
Cat.
No.
H1607
H1627
H1607
H1618
H1627
H1638
H1607
H1618
H1627
H1638
H1638
H1607
H1618
H1627
H1638
H1407
H1418
H1427
H1607
H1438
H1618
H1627
H1638
H1438
H1607
H1618
H1627
H1407
H1418
H1427
H1607
H1438
H1116
H1056
H1066
H1076
H1407
H1086
H1418
H1427
H1106
H1438
H1086
H1116
H1106
H1407
H1418
H1427
H1438
H1056
H1066
H1076
H1407
H1086
H1418
H1427
H1116
H1106
H1086
H1116
Gear
Cat.
No.
QB1212
QB812
QB1216
QB1016
QB816
QB616
DB1600
DB1610
DB1620A
QB620A
DB1630A
DB1601A
DB1611
DB1621A
DB1631A
DB1400
DB1410
DB1420A
DB1602A
DB620A
DB1612
DB1622
DB1632A
DB1430A
DB1603A
DB1613A
DB1623A
DB1401A
DB1411
DB1421A
QB1260A
DB1431A
G1110†
GB1050A
GB1060A
GB1070
DB1402A
GB1077A
DB1412
DB1422
GB1100
DB1432A
GB1080A
G1111†
GB1101
DB1403A
DB1413A
DB1423A
D1433†
GB1051
GB1061A
GB1071
DB1260A
GB1081A
DB1414A
DB860A
G1112†
G1102†
GB1082A
G1113†
DP
12
8
12
10
8
6
12
10
8
6
6
12
10
8
6
12
10
8
12
6
10
8
6
6
12
10
8
12
10
8
12
6
3
12
10
8
12
6
10
8
4
6
6
3
4
12
10
8
6
12
10
8
12
6
10
8
3
4
6
3
D
*Torque in Lb. Ins.
†Cast Iron Gear Rating with Hardened Worm shown.
All Worm and Worm Gear Ratings are based on a Hardened Steel Worm used with a Bronze Worm Gear.
1. For a Hardened Steel Worm used with a Cast Iron Gear, multiply the listed Rating by .50.
2. For an Unhardened Steel Worm used with a Cast Iron Gear, multiply the listed Rating by .25.
P-1930-BG
04/10
Boston Gear 800-825-6544
97
Worms & Worm Gears
Steel-Hardened, Ground & Polished Worms
Bronze Worm Gears
Approximate Horsepower and Torque* Ratings
For Class I Service (Service Factor = 1.0)
Worm RPM
Center
Ratio
Distance
2.167
40
2.625
3.250
4.333
3.750
48
5.000
10.000†
2.583
50
3.125
3.875
5.167
54
11.000†
3.000
60
3.625
4.500
6.000
72
7.000
3.833
80
4.625
5.750
4.667
100
5.625
7.000
Input
HP
.48
.72
1.12
2.11
1.26
2.37
4.06
.55
.83
1.30
2.43
4.34
.60
.91
1.42
2.66
2.79
.64
.96
1.49
.60
.90
1.40
1800
Output
Torque
490
742
1190
2310
1614
3110
5320
700
1068
1716
3327
5985
924
1408
2269
4370
5521
1288
1961
3165
1505
2310
3711
Input
HP
.26
.43
.71
1.39
.79
1.56
1.68
.30
.51
.82
1.60
1.79
.33
.54
.89
1.75
1.84
.35
.57
.94
.33
.54
.88
600
Output
Torque
672
1134
1974
4034
2622
5445
6608
998
1733
2836
5777
7434
1323
2142
3718
7625
9605
1849
3042
5210
2206
3571
6092
Input
HP
.06
.11
.18
.38
.20
.43
.72
.07
.12
.21
.44
.77
.08
.13
.23
.49
.51
.08
.14
.24
.08
.13
.22
100
Output
Torque
782
1361
2420
5345
3267
7260
17088
1134
1954
3498
7563
19224
1664
2571
4538
10210
12705
2118
3630
6555
2458
4223
7563
Worm
Cat.
No.
H1056
H1066
H1076
H1086
H1076
H1086
H1116
H1056
H1066
H1076
H1086
H1116
H1056
H1066
H1076
H1086
H1086
H1056
H1066
H1076
H1056
H1066
H1076
Gear
Cat.
No.
GB1052A
GB1062A
GB1072A
GB1078
GB1073
GB1083
G1114†
GB1053A
GB1063
GB850
GB1079
G1115†
GB1260A
GB1064
GB860
GB1087
GB1084
GB1054
GB1067
GB1074A
GB1055
GB1065
GB8100
DP
12
10
8
6
8
6
3
12
10
8
6
3
12
10
8
6
6
12
10
8
12
10
8
*Torque in Lb. Ins.
†Cast Iron Gear Rating with Hardened Worm shown.
All Worm and Worm Gear Ratings are based on a Hardened Steel Worm used with a Bronze Worm Gear.
1. For a Hardened Steel Worm used with a Cast Iron Gear, multiply the listed Rating by .50.
2. For an Unhardened Steel Worm used with a Cast Iron Gear, multiply the listed Rating by .25.
3. For an Unhardened Steel Worm used with a Bronze Gear, multiply the listed Rating by .35.
CENTER DISTANCES AND RATIOS AVAILABLE WITH STOCK WORM GEARING
Worm Thread
Center
No. of
Distance
Teeth Single Double Quad
(inches) Pitch in Gear
Ratio
D
.375
.479
.531
.583
.666
.688
.688
.792
.844
.875
.938
1.000
1.000
1.083
1.156
1.208
1.250
1.292
1.333
1.469
1.500
1.562
1.625
1.719
1.750
1.750
48
48
32
48
24
48
32
48
32
24
16
48
32
24
32
48
16
24
12
32
24
16
10
32
24
12
20
30
20
40
20
50
30
60
40
30
20
80
50
40
60
100
30
50
20
80
60
40
20
96
72
30
20
30
20
40
20
50
30
60
40
30
20
80
50
40
60
100
30
50
20
80
60
40
20
96
72
30
10
15
10
20
10
25
15
30
20
15
10
40
25
20
30
50
15
25
10
40
30
20
10
48
36
15
5
7.5
5
10
5
12.5
7.5
15
10
7.5
5
20
12.5
10
15
25
7.5
12.5
5
20
15
10
5
24
18
7.5
Worm Thread
Center
No. of
Distance
Teeth Single Double Quad
(inches) Pitch in Gear
Ratio
1.781
1.875
1.917
2.000
2.125
2.167
2.188
2.250
2.333
2.583
2.625
2.625
2.667
2.812
3.000
3.000
3.125
3.250
3.438
3.500
3.625
3.750
3.833
3.875
4.000
4.000
32
16
24
8
10
12
16
24
24
12
10
8
6
16
12
6
10
8
16
6
10
8
12
8
6
4
100
50
80
20
30
40
60
96
100
50
40
30
20
80
60
24
50
40
100
30
60
48
80
50
36
20
100
50
80
20
30
40
60
96
100
50
40
30
20
80
60
24
50
40
100
30
60
48
80
50
36
20
50
25
40
10
15
20
30
48
50
25
20
15
10
–
30
12
25
20
–
15
30
–
40
25
–
–
25
12.5
20
5
7.5
10
15
24
25
12.5
10
7.5
5
20
15
6
12.5
10
–
7.5
15
–
–
12.5
–
–
Worm Thread
Center
No. of
Distance
Teeth Single Double Quad
(inches) Pitch in Gear
Ratio
4.333
4.500
4.500
4.625
4.667
5.000
5.000
5.167
5.500
5.625
5.750
6.000
6.000
6.500
6.750
7.000
7.000
7.000
7.500
7.667
8.000
9.000
9.333
9.500
10.000
11.000
6
8
4
10
12
6
3
6
4
10
8
6
3
4
8
8
6
3
4
6
3
6
6
4
3
3
40
60
24
80
100
48
18
50
32
100
80
60
24
40
96
100
72
30
48
80
36
96
100
64
48
54
40
60
24
80
100
48
18
50
32
100
80
60
24
40
96
100
72
30
48
80
36
96
100
64
48
54
20
30
–
40
–
–
–
25
–
50
–
30
–
–
–
–
36
–
–
–
–
–
–
–
–
–
10
15
–
20
–
–
–
12.5
–
–
–
15
–
–
–
–
18
–
–
–
–
–
–
–
–
–
Example: Given a center distance of 2.625", Table lists Worm and Worm Gear Ratios available:
10 Pitch, 40 tooth, single = 40 to 1
8 Pitch, 30 tooth, single = 30 to 1
10 Pitch, 40 tooth, double = 20 to 1
8 Pitch, 30 tooth, double = 15 to 1
10 Pitch, 40 tooth, quad = 10 to 1
8 Pitch, 30 tooth, quad = 7.5 to 1
98
Boston Gear 800-825-6544
P-1930-BG
04/10
Shaft Accessories
SECTION CONTENTS
SHAFT COUPLINGS
Catalog Number Selections/Dimensions................................................................................100-106
Engineering .......................................................................................................................................312
UNIVERSAL JOINTS
General Description..........................................................................................................................107
Catalog Number Selections/Dimensions................................................................................108-113
Engineering .......................................................................................................................................312
SHAFT COLLARS
Set Screw Collars .............................................................................................................................114
Clamping Collars.......................................................................................................................115-117
THRUST WASHERS
Catalog Number Selections/Dimensions .......................................................................................118
BUSHINGS
Catalog Number Selections/Dimensions .......................................................................................119
PULLEYS (ROUND)
E
Catalog Number Selections/Dimensions .......................................................................................120
MINIATURE TIMING BELTS AND PULLEYS
General Description/Engineering....................................................................................................121
Timing Belt Selections/Dimensions ........................................................................................124, 130
Timing Belt Pulleys Selections/Dimensions ...........................................................................125-129
131-134
P-1930-BG
04/10
Boston Gear 800-825-6544
99
Shaft Couplings
FC Series
Insert (3-Jaw) Type
PRECISION MACHINED BORED OR SOLID HUBS
THREE TYPES OF INSERTS for different service requirements
NO LUBRICATION NEEDED
BORE SIZES FROM 3/8" TO 2-1/8"
COMPLETE WITH KEYWAY AND SETSCREW
Reference Pages
Alignment—312
Keyways and Setscrews—313
Coupling Inserts
OIL-IMPREGNATED BOST-BRONZ— Recommended for high torque loads, particularly at slower speeds.
OIL-RESISTANT SYNTHETIC RUBBER—Recommended where quietness is desired, particularly at motor speeds.
POLYURETHANE—Recommended where moderate to heavy shock loads are encountered.
Load Data
HORSEPOWER AND TORQUE RATING AT
RECOMMENDED SPEEDS FOR INSERTS INDICATED
Coupling
Size
FC12
FC15
FC20
FC25
FC30
FC38
FC45
FC12
FC15
FC20
FC25
FC30
FC38
FC45
E
FC12
FC15
FC20
FC25
FC30
FC38
FC45
Shaft
Diameter
Range
Maximum Horsepower Rating At RPM Of *
50 100 300 690 870 1150
XFCBB BOST-BRONZ INSERTS
3-8–5/8 .16 .32
.95 2.2 2.8 3.6
1/2–7/8 .40 .79
2.4 5.5 6.9 9.1
1/2-1-1/8 .79 1.6
4.8 10.9 13.8 18.2
3/4–1-3/8 1.4 2.9
8.6 19.7 24.8 —
1–1-5/8 2.5 5.1 15.2 35.0 —
—
1-1/4–1-7/8 5.6 11.1 33.3 —
—
—
1-3/4–2-1/8 8.7 17.5
—
—
—
—
XFCR RUBBER INSERTS
3/8–5/8
— .10
.31 .71 .90 1.2
1/2–7/8
— .20
.60 1.4 1.7 2.3
1/2–1-1/8 — .40
1.2 2.7 3.5 4.6
3/4–1-3/8 — .71
2.1 4.9 6.2 8.2
1–1-5/8
— 1.3
3.8 8.8 11.0 14.6
1-1/4–1-7/8 — 2.5
7.6 17.5 22.1 29.2
1-3/4–2-1/8 — 4.4 13.3 30.7 38.7 51.1
XFCA POLYURETHANE INSERTS
3/8–5/8 .09 .19
.56 1.2 1.6 2.0
1/2–7/8 .18 .37
1.1 2.5 3.1 4.0
1/2–1-1/8 .35 .70
2.1 4.6 5.7 7.5
3/4–1-3/8 .62 1.2
3.7 8.1 10.1 13.1
1–1-5/8 1.1 2.2
6.5 14.4 17.9 23.3
1-1/4–1-7/8 2.2 4.3 12.9 28.4 35.3 45.8
1-3/4–2-1/8 3.7 7.5 22.4 49.2 61.0 79.0
1750 3450
Max.
Torque
(Lb. Ins.)
5.6
13.9
—
—
—
—
—
—
—
—
—
—
—
—
200
500
1000
1800
3200
7000
11000
1.8
3.5
6.9
12.5
22.2
44.4
77.7
3.6
56.8
13.7
24.6
43.8
—
—
65
125
250
450
800
1600
2800
3.0
6.0
11.1
19.3
34.3
67.3
115.9
5.7
11.3
20.7
35.8
63.6
—
—
125
250
470
845
1500
3000
5250
Selection Procedure
1. From Table select Service Factor.
2. Determine Design Load
Design HP = Application HP x S.F.
or
Design Torque = Application Torque x S.F.
3. Select coupling size from Load Rating
Table which has a rating equal to or
greater than the design load.
COUPLING SERVICE FACTORS
Load
Classification
Service
Factor
Uniform
Moderate Shock
Heavy Shock
1.0
1.75
2.50
*For uniform load.
100
Boston Gear 800-825-6544
P-1930-BG
04/10
Shaft Couplings
FC Series Bored and Solid Hubs
Insert (3-Jaw) Type
KEYWAY
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
All
OVERALL
LENGTH
SETSCREW
O.D.
BORE
HUB
DIA.
+.001 – .000
BORE
LENGTH
HUB
PROJ.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
To order complete coupling order two coupling halves and one coupling insert
Hub
Coupling
Bore
Overall
Bore
O.D.
Size
Length+
Length++ Dia. Proj.
FC12
FC15
FC20
FC25
FC30
FC38
FC45
—
3/8
7/16
1/2
5/8
—
1/2
9/16
5/8
3/4
7/8
—
1/2
9/16
5/8
3/4
7/8
15/16
1
1-1/8
—
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
—
1
1-1/8
1-1/4
1-7/16
1-1/2
1-5/8
—
1-1/4
1-1/2
1-9/16
1-5/8
1-3/4
1-7/8
—
1-3/4
1-7/8
2
2-1/8
Coupling Halves
Bost-Bronz
Rubber
Polyurethane
Assembly
Catalog
Item
Catalog
Item
Catalog
Item
Catalog
Item
Clearance
Number
Code Number Code Number Code Number Code
—
27/32
1-1/4
2-5/16
1
5/8
3-3/16
1-1/32 1-1/2
2-3/4
1-1/4
3/4
3-3/4
—
—
1-7/16
2
3-11/16 1-3/4 1-1/8
4-13/16
—
1-19/32 2-1/2
4-1/8
2-1/4 1-1/4
5-3/8
—
2-5/32
3
5-15/32 2-3/41-11/16
7
—
2-5/8
3-3/4
6-5/16
4-1/2
7-3/16
3-1/2 1-7/8
8-3/16
—
3
4
2-1/8
9-5/16
FC12 SOLID
FC12-3/8
FC12-7/16
FC12-1/2
FC12-5/8
FC15 SOLID
FC15-1/2
FC15-9/16
FC15-5/8
FC15-3/4
FC15-7/8
FC20 SOLID
FC20-1/2
FC20-9/16
FC20-5/8
FC20-3/4
FC20-7/8
FC20-15/16
FC20-1
FC20-1-1/8
FC25 SOLID
FC25-3/4
FC25-7/8
FC25-1
FC25-1-1/8
FC25-1-3/16
FC25-1-1/4
FC25-1-3/8
FC30 SOLID
FC30-1
FC30-1-1/8
FC30-1-1/4
FC30-1-3/8
FC30-1-7/16
FC30-1-1/2
FC30-1-5/8
FC38 SOLID
FC38-1-1/4
FC38-1-1/2
FC38-1-9/16
FC38-1-5/8
FC38-1-3/4
FC38-1-7/8
FC45 SOLID
FC45-1-3/4
FC45-1-7/8
FC45-2
FC45-2-1/8
47448
08246
08248
08250
52405
47449
08252
61421
08254
08256
61422
47450
08258
66063
08260
08262
08264
08266
08268
52406
47451
08270
08272
08274
08276
08278
08280
52408
47452
08282
08284
08286
08288
08290
08292
52409
24650
08294
08296
08298
08300
08302
08304
24816
08306
08308
08310
08312
XFCBB12 08064 XFCR12 08078 XFCA12 08050
XFCBB15 08066 XFCR15 08080 XFCA15 08052
XFCBB20 08068 XFCR20 08082 XFCA20 08054
XFCBB25 08070 XFCR25 08084 XFCA25 08056
XFCBB50 08072 XFCR30 08080 XFCA30 08058
E
XFCBB38 08074 XFCR38 08088 XFCA38 08060
XFCBB45 08076 XFCR45 08090 XFCA45 08062
+Length of hole in each half. ++Total length of coupling with jaws engaged full depth. †Total length of coupling with jaws completely disengaged for insert assembly.
P-1930-BG
04/10
Boston Gear 800-825-6544
101
Shaft Couplings
BF Series Bost-Flex®
Spider Ring (3-Jaw) Type
ECONOMICAL 3-JAW COUPLING
SPIDER RING URETHANE INSERT absorbs shock
and vibration. Provides through opening for close
coupling of shafts.
BORE SIZES FROM 3/8” TO 1-1/4”
COMPLETE WITH KEYWAY AND SETSCREW.
OVERALL
LENGTH
KEYWAY
STANDARD TOLERANCES
Dimensions
Bore
O.D.
Tolerance
All
HUB
DIA.
BORE
+.001 – .000
Reference Pages
E
F
SETSCREW
Alignment—312
Keyways and Setscrews—313
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Includes two coupling halves and one coupling insert
Coupling
Size
BF7
BF10
BF13
BF18
E
Bore
A
B
3/8
1/2
1/2
1/2
1/2
5/8
3/4
5/8
5/8
3/4
3/4
3/4
3/4
3/4
7/8
1
7/8
7/8
1
1
1
1
1
1-1/8
1-1/4
1-1/8 1-1/8
1-1/4
1-1/4 1-1/4
3/8
1/2
Hub
Diameter
7/8
F
Assembly
Clearance
Approx.
Weight
(Oz.)
1/2
5/16
1-5/8
2
3/4
7/16
2-3/8
6.5
3
14
3-5/8
37
O.D.
Overall
Length
E
1-7/32
1-5/16
1-1/4
1-19/32 1-15/16
1-5/8
1-31/32
2-1/4
2-23/32 2-15/16 1-1/8 11/16
2-7/16 15/16 9/16
Replacement
Insert
Item
Code
Coupling
Catalog
Number
Item
Code
BF7 3/8–3/8
BF7 3/8–1/2
BF7 1/2–1/2
BF10 1/2–1/2
BF10 1/2–5/8
BF10 1/2–3/4
BF10 5/8–5/8
BF10 5/8–3/4
BF10 3/4–3/4
BF13 3/4–3/4
BF13 3/4–7/8
BF13 3/4–1
BF13 7/8–7/8
BF13 7/8–1
BF13 1–1
BF18 1–1
BF18 1–1-1/8
BF18 1–1-1/4
BF18 1-1/8–1-18
BF18 1-1/8–1-1/4
BF18 1-1/4–1-1/4
11730
11734
11732
11736
11742
11744
11738
11746
11740
11748
11754
11756
11750
11758
11752
11760
11766
11768
11762
11770
11764
11722
11724
11726
11728
HORSEPOWER AND TORQUE RATINGS
Selection Procedure
Size
For Service Factors and Procedures,
refer to FC Couplings (Page 100).
BF 7
BF 10
BF13
BF 18
102
Boston Gear 800-825-6544
100
.044
.11
.25
.48
300
.13
.34
.76
1.40
Revolutions per Minute
690
870
1150
.31
.39
.51
.78
1.00
1.30
1.70
2.20
2.90
3.30
4.10
5.50
1750
.78
2.00
4.40
8.30
3450
1.5
3.9
8.8
16.4
Max Torque
(Lb. Ins.)
28
72
160
300
P-1930-BG
04/10
Shaft Couplings
BG Series
Shear Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Coupling
Size
Bore
A
1/8
BG47
3/16
1/4
3/16
BG11-1
1/4
5/16
1/4
BG11-2
5/16
3/8
5/16
BG11-3
3/8
1/2
3/8
BG11-4
1/2
5/8
1/2
BG11-5
BG11-6
BG11-7
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1
B
1/8
3/16
1/4
3/16
1/4
1/4
3.16
1/4
1/4
5/16
5/16
1/4
5/16
3/8
5/16
3/8
3/8
5/16
3/8
1/2
3/8
1/2
1/2
3/8
1/2
5/8
1/2
5/8
5/8
1/2
5/8
3/4
5/8
3/4
1/2
5/8
3/4
3/4
3/4
5/8
7/8
1
Hub
O.D.
Diameter
Overall
Length
F
3/16
7/16
9/16
13/16
5/8
13/16
1-3/8 11/32
3/4
7/8
1
1-1/4
1-3/4 13/32
2-1/8 15/32
1
1-3/8
2-1/4 17/32
1-1/8
1-5/8
2-1/2 19/32
1-3/8 1-13/16 2-11/16 11/16
1-1/2
2
2-7/8
3/4
Catalog
Number
BG47-2-2
BG47-2-3
BG47-2-4
BG47-3-3
BG47-3-4
BG47-4-4
BG11-1-3-3
BG11-1-3-4
BG11-1-4-4
BG11-1-4-5
BG11-1-5-5
BG11-2-4-4
BG11-2-4-5
BG11-2-4-6
BG11-2-5-5
BG11-2-5-6
BG11-2-6-6
BG11-3-5-5
BG11-3-5-6
BG11-3-5-8
BG11-3-6-6
BG11-3-6-8
BG11-3-8-8
BG11-4-6-6
BG11-4-6-8
BG11-4-6-10
BG11-4-8-8
BG11-4-8-10
BG11-4-10-10
BG11-5-8-8
BG11-5-8-10
BG11-5-8-12
BG11-5-10-10
BG11-5-12-12
BG11-6-8-8
BG11-6-10-10
BG11-6-10-12
BG11-6-12-12
BG11-7-8-12
BG11-7-10-10
BG11-7-12-14
BG11-7-16-16
Item
Code
49887
49888
49889
49890
47891
47892
49893
49394
49395
49896
49897
49898
49899
49900
49901
49902
49903
49904
49905
49906
49907
49908
49909
49910
49911
49912
49913
49914
49915
49916
49917
49918
49919
49920
49921
49923
49924
49925
49926
49927
49930
49931
OVERALL
LENGTH
BORE
O.D. “B”
SETSCREW
BORE
“A”
HUB
DIA.
F
METAL HUBS JOINED PERMANENTLY
BONDED ELASTOMER require no
lubrication. Flexible in any direction—
accommodates misalignment up to 1/32”
parallel, 2” angular.
HIGH TORSIONAL DEFLECTION
isolates low frequency vibration.
BORE SIZES FROM 1/8” TO 1”
COMPLETE WITH STANDARD
SETSCREWS (Not installed).
Load Data
HORSEPOWER AND TORQUE RATINGS
Size
BG-47
BG11-1
BG11-2
BG11-3
BG11-4
BG11-5
BG11-6
BG11-7
100
.001
.004
.007
.014
.019
.029
.043
.057
P-1930-BG
04/10
300
.003
.011
.021
.043
.057
.086
.129
.171
Revolutions per Minute
690
870
1150
1750
.008
.010
.013
.020
.025
.031
.041
.062
.049
.062
.082
.125
.099
.124
.164
.250
.131
.166
.219
.333
.197
.248
.328
.500
.296
.313
.493
.750
.394
.497
.657
1.000
Max Torque
3450
(Lb. Ins.)
.039
.72
.123
2.25
.246
4.50
.493
9.00
.657
12.00
.985
18.00
1.478
27.00
1.971
36.00
STANDARD TOLERANCES
Dimensions
Bore
1/8 – 3/8
1/2 – 5/8
3/4 – 1
Tolerance
+.001 – .000
+.0015 – .000
+.002 – .000
Reference Pages
Alignment—312
Keyways and Setscrews—313
Boston Gear 800-825-6544
103
E
Shaft Couplings
SCC Series
Clamping Type
LOW CARBON STEEL COUPLINGS with a black oxide finish.
BORE SIZES FROM 1/4” to 2”
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
A
1/4
3/8
1/2
OUTSIDE
DIA.
LENGTH
5/8
BORE
(A)
BORE (B)
3/4
CLAMP SCREW
7/8
1
1-1/8
1-1/4
STANDARD TOLERANCES
Dimensions
Bore
All
Tolerance
+.001 – .000
1-3/8
1-1/2
1-3/4
2
B
1/4
1/4
3/8
3/8
1/2
1/2
5/8
1/2
5/8
3/4
5/8
7/8
1
1
1-1/8
1
1-1/4
1
1-3/8
1
1-1/2
1-3/4
2
O.D.
Length
13/16
1-1/4
Clamp
Screws
(4)
4-40
1-1/16
1-5/8
6-32
1-1/4
1-7/8
8-32
1-1/2
2-1/4
10-32
1-3/4
2-5/8
1/4-28
1-7/8
2-7/8
1/4-28
2
3
1/4-28
2-1/8
3-1/4
1/4-28
2-1/4
3-3/8
1/4-28
2-3/8
3-5/8
1/4-28
2-1/2
3-3/4
1/4-28
3
3-1/4
4-1/2
4-7/8
516-24
5/16-24
Catalog
Number
Item
Code
SCC1/4 x 1/4
SCC3/8 x 1/4
SCC3/8 x 3/8
SCC1/2 x 3/8
SCC1/2 x 1/2
SCC5/8 x 1/2
SCC5/8 x 5/8
SCC3/4 x 1/2
SCC3/4 x 5/8
SCC3/4 x 3/4
SCC7/8 x 5/8
SCC7/8 x 7/8
SCC1 x 1
SCC1-1/8 x 1
SCC1-1/8 x 1-1/8
SCC1-1/4 x 1
SCC1-1/4 x 1-1/4
SCC1-3/8 x 1
SCC1-3/8 x 1-3/8
SCC1-1/2 x 1
SCC1-1/2 x 1-1/2
SCC1-3/4 x 1-3/4
SCC2 x 2
49289
49290
49291
49292
49293
49294
49295
49296
49297
49298
49299
49300
49302
49303
49304
49305
49306
49307
49308
49309
49310
49312
49314
Load Data
E
Capacity is based on a standard
steel, one piece coupling
mounted with recommended
screw torque on a dry shaft.
Capacities shown are for general
guidance only. In applications
involving control of torque loads,
capacity should be determined
experimentally on actual parts
involved.
104
Boston Gear 800-825-6544
TORQUE CAPACITY
Bore
1/4
3/8
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2
Torque
Capacity
(Lb. Ins.)
72
192
480
1200
1500
1680
1920
2200
3000
3500
4000
5400
6000
4-40
6-32
8-32
10-32
Recommended
Screw Torque
(Lb. Ins.)
20
30
55
90
1/4-28
220
5/16-24
435
Screw
Size
P-1930-BG
04/10
Shaft Couplings
FA Series
Multi-Jaw Type
UNTREATED STEEL COUPLINGS for use in light duty
applications, require no lubrication.
BORE SIZES FROM 3/16” to 1/2”
COMPLETE WITH STANDARD SETWCREWS
OVERALL
LENGTH
SETSCREW
STANDARD TOLERANCES
Dimensions
HUB
DIA.
BORE
O.D.
Bore
Tolerance
All
± .0005
Reference Pages
BORE
LENGTH
Alignment—312
Keyways and Setscrews—313
HUB
PROJ.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Coupling Bore
Size
3/16
7/32
1/4
5/16
3/8
7/16
1/2
FA5
FA75
FA10
Bore
Assembly
Length++ Clearance‡
O.D.
Length†
1/2
1-1/8
1/2
3/4
1-1/2
1
2
Hub
Teeth
Dia.
Proj.
1-9/32
7/16
7/16
10
5/8
1-3/4
11/16
33/64
10
7/8
2-9/32
15/16
3/4
12
Steel
Catalog
Number
FA5 3/16-3/16
FA5 7/32-7/32
FA5 1/4-1/4
FA75 5/16-5/16
FA75 3/8-3/8
FA10 7/16-7/16
FA10 1/2-1/2
Item
Code
07900
07902
07904
07910
07912
07908
07906
†Total length of coupling with jaws engaged full depth. ++Length of hole in each half.
‡Approximate total length of coupling with jaws completely disengaged.
CR Series
Rigid (One Piece) Type
BORE SIZES FROM 1/4” TO 1-1/4”
COMPLETE WITH STANDARD SETSCREWS
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
O.D.
1/4
5/16
3/8
1/2
5/8
3/4
7/8
1
1-1/4
1/2
5/8
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
Overall
Length
3/4
1
1
1-1/2
2
2
2
3
4
A
3/16
1/4
1/4
3/8
1/2
1/2
1/2
3/4
1
Catalog
Number
CR4
CR5
CR6
CR8
CR10
CR12
CR14
CR16
CR20
Item
Code
34200
34202
34204
34206
34208
34210
34212
34214
34216
E
SETSCREW
A
O.D.
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
P-1930-BG
All
04/10
+.001 – .000
Reference Pages
Keyways and Setscrews—313
A
BORE
OVERALL
LENGTH
Boston Gear 800-825-6544
105
Shaft Couplings
FCP Series
Sleeve Type
SPLINED HUBS AND URETHANE SLEEVE accommodate
misalignment to 5°.
SLEEVE STOCK available for producing special lengths.
NO LUBRICATION NEEDED
COMPLETE WITH SETSCREWS
L
A
2
Materials
Urethane Sleeves
Delrin Hubs
Aluminum Alloy Inserts
SETSCREW
A
1
16
BORE
O.D.
H
STANDARD TOLERANCES
Dimensions
Bore
All
INSERT
E
Tolerance
HUB
+.001 – .000
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Complete
Coupling
Bore O.D.
A
E
H
L
Setscrew
Catalog
Item
Number
Code
.125
4 – 40
FCP21 – 1/8 54893
.1875 37/64 7/32 7/16 9/16 15/16 6 – 32
FCP21 – 3/16 54894
.250
FCP21 – 1/4 54895
.3125
8 – 32
FCP23 – 5/16 54899
.375 1-5/64 3/8 11/16
1
1-9/16 10 – 32 FCP23 – 3/8 54900
.4375
FCP23 – 7/16 54901
1/4 – 20 FCP23 – 1/2 54902
.500
X5R21 – 16
54913
X5R23 – 32
54915
ORDER BY CATALOG NUMBER
OR ITEM CODE
HORSEPOWER RATINGS (MAXIMUM)
AT 1750 RPM
Size
FCP21
FCP23
106
Sleeve
Only
Catalog
Item
Number
Code
Sleeve Stock
Load Data
E
Insert and Hub
Assembly
Catalog
Item
Number
Code
XFCP21 – 1/8
54903
XFCP21 – 3/16 54904
XFCP21 – 1/4
54905
XFCP23 – 5/16 54909
XFCP23 – 3/8
54910
XFCP23 – 7/16 54911
XFCP23 – 1/2
54912
Boston Gear 800-825-6544
Horsepower
1/20
1/2
O.D.
Length
(Inches)
1/2
1
12
Catalog
Number
5R21 – 16S
5R23 – 32S
Item
Code
54916
54918
P-1930-BG
04/10
Universal Joints
J/JS Series
Pin and Block Type; Steel and Stainless Steel
Boston Gear precision machined J and JS Series Universal Joints are designed for
connecting shafts at angles up to 30 degrees and speeds up to 2000 RPM. All sizes are
stocked with both solid and bored hubs.
Joints J100 and J100B and larger are equipped with self-closing, ball valve oilers,
creating an oil reservoir to provide enclosed lubrication.
The self-locking assembly ring on joints with 7/8” and larger hub diameter, fits into
recess provided in center bearing block and snaps around groove in small bearing pin
— assuring locking of entire assembly allowing for quick and easy disassembly and
reassembly.
Joints with 3/4” and smaller hub diameters are locked by riveting the small bearing pin.
Joint covers (boots) keep dirt and moisture out and lubricants in.
Selection
Example:
Torque ratings may be calculated from data in tables. The
tables indicate the Rated Static Torque (Lb. Ins.) of alloy and
stainless steel joints and Speed-Angle factors suggested for
various operating conditions.
A pair of universal joints are desired to transmit 1/2 HP from
one shaft running at 500 RPM to another located at an angle
of 10 degrees (from a straight line).
The approximate service torque rating of a particular joint
is obtained by dividing the Rated Static Torque by the
appropriate Speed-Angle factor.
The joints will be connected by an intermediate shaft and
arranged to operate at equal angles of 5 degrees.
A Speed-Angle factor of 9 is indicated in the table for an
operating angle of 5 degrees and a speed of 500 RPM.
Selecting a universal to satisfy a specified torque requirement
is also made convenient with the data provided.
Torque Load = 63025 x HP= 63025 x 1/2 = 63 Lb. Ins.
RPM
500
The designated torque load should be multiplied by the
appropriate Speed-Angle factor to obtain an equivalent static
torque load.
J100 size alloy steel or JS175 size stainless steel universals
would be suggested for this application.
A universal with a rated static torque equal to or greater than
the calculated torque load would then be selected.
SPEED-ANGLE FACTORS
Speed
In
RPM
2000
1800
1600
1400
1200
1000
900
800
700
600
500
400
300
200
100
50
25
10
0
Operating Angle – Degrees (Deviation From Straight Line)
0
21
19
17
15
13
11
10
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.5
1.3
1.1
1.0
1/2
22
20
17.8
15.8
13.6
11.6
10.6
9.4
8.4
7.4
6.4
5.2
4.2
3.2
2.2
1.6
1.3
1.2
1.1
1
23.2
21.0
18.8
16.6
14.4
12.2
11.0
10.0
8.8
7.8
6.6
5.6
4.4
3.4
2.2
1.7
1.4
1.2
1.1
2
25.2
22.8
20.4
18.0
15.6
13.2
12.0
10.8
9.6
8.4
7.2
6.0
4.8
3.6
2.4
1.8
1.5
1.3
1.2
3
27.4
24.8
22.2
19.6
17.0
14.4
13.0
11.8
10.4
9.2
7.8
6.6
5.2
4.0
2.6
2.0
1.6
1.4
1.3
4
29.4
26.6
23.8
21.0
18.2
15.4
14.0
12.6
11.2
9.8
8.4
7.0
5.6
4.2
2.8
2.2
1.8
1.5
1.4
5
31.6
28.6
25.6
22.6
19.6
16.6
15.0
13.6
12.0
10.6
9.0
7.6
6.0
4.6
3.0
2.2
1.9
1.7
1.5
6
–
30.4
27.2
24.0
20.8
17.6
16.0
14.4
12.8
11.2
9.6
8.0
6.4
4.8
3.2
2.4
2.0
1.8
1.6
8
–
–
–
27
23.4
19.8
18.0
16.2
14.4
12.6
10.8
9.0
7.2
5.4
3.6
2.8
2.2
2.0
1.8
10
–
–
–
–
–
22
20
18
16
14
12
10
8.0
6.0
4.0
3.0
2.6
2.2
2.0
RATED STATIC TORQUE (LB. INS.)
12
–
–
–
–
–
–
22
19.8
17.6
15.4
13.2
11.0
8.8
6.6
4.4
3.4
2.8
2.4
2.2
15
–
–
–
–
–
–
–
–
20
17.6
15.0
12.6
10.0
7.6
5.0
3.8
3.2
2.8
2.6
20
–
–
–
–
–
–
–
–
–
–
18
15
12
9.0
6.0
4.6
3.8
3.4
3.0
25
–
–
–
–
–
–
–
–
–
–
–
17.6
14.0
10.6
7.0
5.2
4.4
3.8
3.6
30
–
–
–
–
–
–
–
–
–
–
–
–
16
12
8.0
6.0
5.0
4.4
4.0
E
STRAIGHT LINE
ALLOY STEEL UNIVERSAL JOINTS
Catalog Number
Torque – Lb. Ins.
J37
20
J50
80
J62
166
J75
320
J87
370
J100
600
J112
670
J125 J150
1040 1680
J175
2500
J200 J250 J300 J400
4400 7000 11,000 26,400
STAINLESS STEEL UNIVERSAL JOINTS
Catalog Number
Torque – Lb. Ins.
P-1930-BG
04/10
JS37 JS50 JS62 JS75 JS87 JS100 JS112 JS125 JS150 JS175 JS200 JS250 JS300 JS400
6
24
50
96 110
180
200
310
500
750 1320 1900 3100 7360
Boston Gear 800-825-6544
107
Universal Joints
J/JS Series Bored and Solid Hubs
Pin and Block Type; Steel and Stainless Steel
STANDARD TOLERANCES
Tolerance
Steel
Stainless
Bore
All
± .001
±.001
Hub Dia.
All
+.000 –.003
±.020
Bore Length
All
±1/16
±1/64
1-3/4 - 4-1/4
±1/64
±1/64
Overall
5 -10-5/8
±1/32
±1/32
Length
C
OVERALL LENGTH
Dimensions
HUB
DIA.
C
BORE DIA.
A
BORE
LENGTH
OVERALL
LENGTH
2
Reference Pages
B
OVERALL
LENGTH
2
Lubrication—312
Mounting—312
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Steel
Stainless Steel
Catalog
Item Catalog Item
Bore
Number
Code Number Code Bore** Length*
J37A-3/16
J37B
J37
J50A-1/4
J50B
J50
J62A-5/16
J62B
J62
J75A-3/8
J75B
J75
J87A-7/16
J87B
J87
J100A-1/2
J100B
J100
J112A-9/16
J112B
J112
J125A-5/8
J125B
J125
J150A-3/4
J150B
J150
J175A-7/8
J175B
J175
J200A-1
J200B
J200
J250A-1-1/4
J250B
J250
J300A-1/1/2
J300B
J300
J400A-2
J400B
J400
E
72467
08426
08400
72468
08428
08402
72469
08430
08404
72470
08432
08406
72471
08434
08408
72472
08436
08410
72473
72474
72475
72476
08438
08412
72477
08440
08414
72478
08442
08416
72479
08444
08418
72480
08446
08420
72481
08448
08422
72482
08450
08424
JS37B
JS37
JS50B
JS50
JS62B
JS62
JS75B
JS75
-JS87B
JS87
JS100B
JS100
JS112B
JS112
-JS125B
JS125
JS150B
JS150
JS175B
JS175
JS200B
JS200
JS250B
JS250
JS300B
JS300
JS400B
JS400
08472
08452
08474
08454
08476
08456
08478
08458
08480
08460
08482
08462
72483
72484
08484
08464
08486
08466
08488
08468
08490
08470
72485
72486
72487
72488
72489
72490
3/16
3/16
1/4
1/4
5/16
5/16
3/8
3/8
7/16
7/16
1/2
1/2
9/16
9/16
5/8
5/8
3/4
3/4
7/8
7/8
1
1
1-1/4
1-1/4
1-1/2
1-1/2
2
2
-
11/16
11/16
3/4
3/4
13/16
13/16
31/32
31/32
1-1/32
1-1/32
1-3/16
1-3/16
1-7/32
1-7/32
1-1/4
1-1/4
1-11/32
1-11/32
1-9/16
1-9/16
1-5/8
1-5/8
2-3/32
2-3/32
2-27/32
2-27/32
3-1/8
3-1/8
-
Universal Joints
Approx.
Overall
Hub
Dia.
Length Keyway Setscrew Weight
Lbs.
3/8
3/8
3/8
1/2
1/2
1/2
5/8
5/8
5/8
3/4
3/4
3/4
7/8
7/8
7/8
1
1
1
1-1/8
1-1/8
1-1/8
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
1-1/2
1-3/4
1-3/4
1-3/4
2
2
2
2-1/2
2-1/2
2-1/2
3
3
3
4
4
4
1-3/4
1-3/4
1-3/4
2
2
2
2-1/4
2-1/4
2-1/4
2-11/16
2-11/16
2-11/16
3
3
3
3-3/8
3-3/8
3-3/8
3-1/2
3-1/2
3-1/2
3-3/4
3-3/4
3-3/4
4-1/4
4-1/4
4-1/4
5
5
5
5-7/16
5-7/16
5-7/16
7
7
7
9
9
9
10-5/8
10-5/8
10-5/8
3/32x3/64
3/32x3/64
3/32x3/64
1/8x1/16
1/8x1/16
3/16x3/32
3/16x3/32
3/16x3/32
1/4x1/8
1/4x1/8
3/8x3/16
1/2x1/4
-
2-56NC
4-40NC
10-32NF
10-32NF
10-32NF
1/4-20NC
1/4-20NC
5/16-18NC
5/16-18NC
5/16-18NC
3/8-16NC
3/8-16NC
1/2-13NC
1/2-13NC
-
.04
.04
.05
.08
.08
.10
.14
.14
.18
.24
.24
.30
.31
.31
.45
.50
.50
.66
.69
.69
.88
.88
.88
1.15
1.44
1.44
1.81
2.31
2.31
2.86
3.31
3.31
4.06
6.81
6.81
8.25
12.5
12.5
15.25
25.8
25.8
31.3
A
Boot Kits†
Catalog† Item
B
C Number Code
1-1/32 1-1/32 9/32
UB37
47602
1-1/4
1-5/16 11/32
UB50
47603
1-1/2
1-7/16 13/16
UB62
47604
1-3/4
1-9/16 9/16
UB75
47605
2
1-13/16 19/32
UB87
47606
UB100
47607
2-9/16 2-7/16 17/32
UB112
72491
2-7/8
2-3/4
1/2
UB125
47608
3-1/4
3-1/4
1/2
UB150
47609
3-5/8
3-3/4
5/8
UB175
47610
4-1/2
4-3/16
5/8
UB200
47611
5-1/2
4-7/8 1-1/16
UB250
47612
5-5/8 1-11/16 UB300
47613
6-5/8
47614
2-1/4
6
6-7/8
2-1/8
5/8
2
UB400
*Approximate Hub Projection
†Each Kit contains (2) Boots and (4) Ties together with complete instructions for installation and lubrication.
**Style A includes bore, keyway and setscrew. Style B includes bore only. Units without an A & B letter have a solid bore.
108
Boston Gear 800-825-6544
P-1930-BG
04/10
Universal Joints
UJNS/UJNL Series BOS-Trong®
Cast/Forged Steel
A BOS-trong joint is composed of two yokes and a center kit. BOS-trong
joints may be purchased assembled, or as separate yokes and center kits.
Individually boxed.
AVAILABLE IN TWO SIZES
EQUIPPED WITH NEEDLE BEARINGS
PRECISION MACHINED FOR LONG, SMOOTH OPERATION
CONTINUOUS OR INTERMITTENT SERVICE
HIGH CAPACITY WITH MINIMUM SWING DIAMETERS
AVAILABLE WITH ROUND, SQUARE OR HEXAGON HOLES
COMPLETE WITH KEYWAY AND SETSCREW
REPLACEABLE CENTER KITS
FITTING FOR LUBRICATION
UJNS CAST STEEL
UJNL FORGED STEEL
Selection
Universal Joints are used in many different types of applications and under a wide variety of operating conditions. No convenient
method can be presented for determining ratings for all possible circumstances. Performance will be affected by vibration, shock
loading, high temperature, dusty environment, etc.
The simplest solution to this problem is to provide approximate ratings of universal joints operating at various angles and speeds
under normal service conditions.
The suggested ratings are for general use in applications where two joints are arranged at equal angles with the bearing pins of the
intermediate yokes in line with each other.
Service torque ratings of the two sizes of BOS-trong Needle Bearing universals are listed in tables. Ratings for intermediate speeds
and/or angles not shown may be found by interpolation.
Load Data
APPROXIMATE TORQUE RATINGS (LB. INS.)
Speed
RPM
1800
1200
900
600
300
200
100
50
25
10
UJNS Series
Operating Angle*—Degrees (Deviation from Straight Line)
Up to
5°
8°
12°
20°
30°
3°
610
515
440
—
—
—
700
590
505
435
—
—
770
650
555
480
365
—
880
740
635
545
415
260
1110
935
800
690
525
325
1270
1070
915
790
600
370
1600
1350
1150
995
755
470
2020
1700
1450
1250
950
590
2540
2140
1830
1580
1200
745
3450
2900
2480
2140
1630
1010
NON-OPERATING FLEX-ANGLE—90°
P-1930-BG
04/10
UJNL Series
Operating Angle†—Degrees (Deviation from Straight Line)
Up to
5°
8°
12°
20°
30°
3°
845
710
610
—
—
—
965
815
695
600
—
—
1060
895
765
660
500
—
1210
1020
875
755
575
355
1530
1290
1100
950
725
450
1750
1480
1260
1090
825
515
2210
1860
1590
1370
1040
645
2780
2350
2000
1730
1310
815
3500
2960
2530
2180
1650
1020
4760
4010
3430
2960
2250
1390
*Maximum Angles (Momentary)—45°
†Maximum Angle (Momentary)—35°
Boston Gear 800-825-6544
109
E
Universal Joints
UJNS/UJNL Series BOS-Trong®
Cast/Forged Steel
All joints have round holes with standard keyways and 3/8—16 hex socket
setscrews.
DIMENSION IN INCHES
SETSCREW
BORE
KEYWAY
HUB
DIA.
OVERALL
LENGTH
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
All
± .001
Hub Dia.
All
+ .000 – .002
Reference Pages
Lubrication—312
Mounting—312
ORDERING INFORMATION
Joints can also be ordered in various
combinations of round, square or hex
holes. To order the combination
desired, specify “UJNS” or “UJNL” and
hole size and type as listed in table of
Yokes, Page 111. Use “S” for square
and “H” for hexagon.
E
110
Boston Gear 800-825-6544
Overall
Bore
Length Hub-A Hub-B
UJNS SERIES
5/8
3/4
13/16
5
5/8
7/8
15/16
1
1-1/8
3/4
13/16
7/8
5
3/4
15/16
1
1-1/8
13/16
7/8
5
13/16 15/16
1
1-1/8
7/8
15/16
5
7/8
1
1-1/8
15/16
5
15/16
1
1-1/8
1
5
1
1-1/8
5
1-1/8 1-1/8
UJNL SERIES
1
1-1/8
1-3/16
5-1/2
1
1-1/4
1-3/8
1-7/16
1-1/2
1-1/8
1-3/16
5-1/2
1-1/8 1-1/4
1-3/8
1-7/16
1-1/2
1-3/16
1-1/4
5-1/2 1-3/16 1-3/8
1-7/16
1-1/2
1-1/4
1-3/8
5-1/2
1-1/4 1-7/16
1-1/2
1-3/8
5-1/2
1-3/8 1-7/16
1-1/2
5-1/2 1-7/16 1-7/16
1-1/2
5-1/2
1-1/2 1-1/2
Hub Dia.
App. Wt. Catalog
Item
Hub-A Hub-B
(Lbs.) Number
Code
SWING DIAMETER—2-1/2”
UJNS 10-10 17300
UJNS 10-12 17302
UJNS 10-13 17304
1-5/8
1-5/8
2
UJNS 10-14 17306
UJNS 10-15 17308
UJNS 10-16 17310
2-1/4
UJNS 10-18 17312
UJNS 12-12 17314
UJNS 12-13 17316
UJNS 12-14 17318
1-5/8
1-5/8
2
UJNS 12-15 17320
UJNS 12-16 17322
2-1/4
UJNS 12-18 17324
UJNS 13-13 17326
UJNS 13-14 17328
1-5/8
1-5/8
2
UJNS 13-15 17330
UJNS 13-16 17332
2-1/4
UJNS 13-18 17334
UJNS 14-14 17336
UJNS 14-15 17338
1-5/8
1-5/8
2
UJNS 14-16 17340
2-1/4
UJNS 14-18 17342
1-5/8
UJNS 15-15 17344
1-5/8
2
UJNS 15-16 17346
2-1/4
UJNS 15-18 17348
1-5/8
UJNS
16-16 17350
1-5/8
2
2-1/4
UJNS 16-18 17352
2-1/4
2-1/4
3
UJNS 18-18 17498
SWING DIAMETER—2-3/4”
2
UJNL 16-16
17354
UJNL 16-18
17356
UJNL 16-19
17358
2
2-1/4
3-3/4 UJNL 16-20
17360
UJNL 16-22
17362
UJNL 16-23
17364
UJNL 16-24
17366
UJNL 18-18
17368
UJNL 18-19
17370
2-1/4
2-1/4
3-3/4 UJNL 18-20
17372
UJNL 18-22
17374
UJNL 18-23
17376
UJNL 18-24
17378
2
UJNL 19-19
17380
UJNL 19-20
17382
2-1/4
2-1/4
3-1/4 UJNL 19-22
17384
UJNL 19-23
17386
UJNL 19-24
17388
2
UJNL 20-20
17390
UJNL 20-22
17392
2-1/4
2-1/4
3-1/4 UJNL 20-23
17394
UJNL 20-24
17396
UJNL 22-22
17398
2-1/4
2-1/4
3-1/4 UJNL 22-23
17400
UJNL 22-24
17402
2-1/4
2-1/4
3-1/4 UJNL 23-23
17404
UJNL 23-24
17406
2-1/4
2-1/4
3-1/4 UJNL 24-24
17408
P-1930-BG
04/10
Universal Joints
UJS/UJL Series
Cast/Forged Steel
Yokes
STANDARD TOLERANCES
DIMENSION
These yokes are for assembly with UJSC Center Kits.
All yokes are furnished with 3/8–16 hex socket setscrew.
UJS14H is 1/8 NPT straight.
TOLERANCE
Round
Bore
Square
Hexagon
+.000 – +.002
3/4 –13/16 +.000 – +.002
7/8 –1-1/2 +.001 +.003
+.002 +.004
KEYWAY
HUB
BORE DIA.
DIM.
ACROSS
FLATS
A
ALL DIMENSIONS IN INCHES
A
Bore
UJS Series
.625
.750
.813
2-1/2
.875
.938
1.000
1.125
UJL Series
1.000
1.125
1.1875
2-3/4 1.250
1.375
1.4375
1.500
Round Bores
Approx.
Setscrew
Catalog
Keyway
Weight
Location
Number
(Lbs.)
Hub
Dia.
3/16x3/32
1.63
(1)
1/4x1/8
(1)
(2)
2.25
2.00 1/4x1/8 (3)
(4)
(4)
(5)
(4)
(4)
(4)
(4)
1-1/4
(4)
1-1/2
3/4
1/4x1/8
2.25
(5)
1-1/4
5/16x5/32
3/8x3/16
(4)(6)
Square Bores
Approx.
Hub
Catalog Item
Weight
Dia.
Number Code
(Lbs.)
Item
Code
Dim.
Across
Flats
UJS10
UJS12
UJS13
UJS14
UJS15
UJS16
UJS18
17410
17412
17414
17416
17418
17420
17422
—
—
.750
1.63
.813
.875 (7)
.938
2.25
1.000(7)
1.126
UJL16
UJL18
UJL19
UJL20
UJL22
UJL23
UJL24
17424
17426
17428
17430
17432
17434
17436
1.000
1.126
2.00
2.25
—
3/4
1-1/4
1-1/2
1-1/2
Hexagon Bores
Catalog
Number
Item
Code
—
UJS12S
UJS13S
UJS14S
—
UJS16S
UJS18S
—
17438
17440
17442
—
17446
17448
—
—
—
UJS14H (7)
—
—
UJS18H
—
—
—
17454
—
—
17456
UJL16S
UJL18S
17450
17452
—
UJL18H
—
17458
(1) Two keyways 180° apart, 3/16x3/32 and 1/4x1/8
(2) Two keyways 180° apart, 1/4x1/8 and 5/16x5/32
(3) Located 90° from shown
(4) Located as shown
(5) Located 180° from shown
(6) Additional setscrew over keyway
(7) Has both .875 and 1.000 square bores @ 45°
Center Kits
Double Yokes
E
ALL DIMENSIONS IN INCHES
Center
A
B
UJS Series
1-61/64 35/64
UJL Series
2-5/16
.644
Kits*
C
D
Approx.
Weight
(Lbs.)
19/32
31/32
1/2
UJSC
17464
5/8
1-1/16
3/4
UJLC
17466
Catalog
Number
Item
Code
J
Maximum
Operating
Angle
Double Yokes
Approx.
Weight
Catalog
(Lbs.)
Number
UJS Series Forged
2-1/2
15°
1
UJSD
UJL Series Forged – 2 piece Welded Construction
4-7/16
35°
2-1/4
UJLD
Item
Code
17460
17462
*Center Kits include 1 cross, 4 bearings, 4 cork washers and 4 lock rings.
P-1930-BG
04/10
Boston Gear 800-825-6544
111
Universal Joints
JP Series Single and Double
Molded Type
MOLDED DELRIN BODY provides vibration dampening and
electrical insulation.
MAX. ANGULAR DISPLACEMENT — Single 45° — Double 90°
MAX. AMBIENT TEMPERATURE — 180°F
COMPLETE WITH SETSCREWS
SINGLE
(2) SETSCREWS
EACH END (SEE NOTE)
BORE
INSERT
C
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
All
BRASS
SPIDER
+ .001 – .000
O.D.
L
DOUBLE
Reference Pages
Mounting — 312
(2) SETSCREWS
EACH END
BORE
Materials
Delrin Body
Nickel Plated Brass Spider and Insert
C
BRASS
SPIDER
F
O.D.
L
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
Bore
Depth
(Typical)
O.D.
.39
1/4
.52
1/8
1/8
3/16
3/16
1/4
1/4
5/16
3/8
L
C
Single
Double
.27
1-3/64
1-23/64
3/8
.41
1-31/64
2
.63
1/2
.54
1-13/16
2-7/16
.86
5/8
.68
2-41/64
3-33/64
Double Only
Single
Max. Setscrew
F
Catalog
Parallel
Number
Offset
5/16
.22
#4 – 40 JP25 – 1/8*
JP37 – 1/8*
17/32
.36
#4 – 40
JP37 – 3/16
JP50 – 3/16
5/8
.43
#6 – 32
JP50 – 1/4
JP62 – 1/4
7/8
.61
#8 – 32 JP62 – 5/16
JP62 – 3/8
Double
Item
Code
Catalog
Number
Item
Code
54194
54195
54196
54197
54198
54199
54200
54201
JPD25 – 1/8
JPD37 – 1/8
JPD37 – 3/16
JPD50 – 3/16
JPD50 – 1/4
JPD62 – 1/4
JPD62 – 5/16
JPD62 – 3/8
54202
54203
54204
54205
54206
54207
54208
54209
* One setscrew each end.
E
LOAD DATA
Basic
Size
25
37
50
62
Maximum Torque†
(Lb. Ins.)
Single
Double
5
16
26
60
2.5
7
12
47
†This is the ultimate or breaking torque for static, zero angle conditions.
Actual operating conditions will dictate use of significantly lower values.
112
Boston Gear 800-825-6544
P-1930-BG
04/10
Universal Joints
JPE Series With Slide Extension
Molded Type
MOLDED DELRIN BODY — provides vibration dampening and
electrical insulation.
MAX. ANGULAR DISPLACEMENT — Single 45° — Double 90°
MAX. AMBIENT TEMPERATURE — 180°F
COMPLETE WITH SETSCREWS
(2) SETSCREWS
EACH END
(SEE NOTE)
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
All
BRASS
SPIDERS
B
+ .001 – .000
C IN CLOSED POSITION
BORE
D
A
Reference Pages
Mounting — 312
G
SQ.
F
O.D.
H
J
Materials
K IN CLOSED POSITION
Delrin Body
Nickel Plated Brass Spider and Insert
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/8
3/16
3/16
1/4
Bore
Depth
(Typical)
O.D.
A
.52
3/8
.41
.74 2-59/64 1-1/8
.63
1/2
.54
.91 2-23/64 1-1/8 3/8 1-34/64 3/16
B
C
D
E
F
G
(Sq.)
– 1-47/64 3/16
H
J
K
Setscrew
Catalog
Number
Item
Code
JPE37 – 1/8
JPE37 – 3/16
JPE50 – 3/16
2-9/16 4-11/64 #6 – 32
JPE50 – 1/4
23/64 2-43/64 4-13/32 #4 – 40
23/64
Basic
Size
54210
54211
54212
54213
LOAD DATA
Maximum Recommended
Torque (Lb. Ins.)
Closed
Open
JPE37
8
5
JPE50
14
10
E
†This is the ultimate or breaking torque for static, zero angle conditions. Actual
operating conditions will dictate use of significantly lower values.
P-1930-BG
04/10
Boston Gear 800-825-6544
113
Setscrew Collars
SC/SSC Series
Steel and Stainless Steel
STEEL BORE SIZES FROM 1/8” TO 3”
STAINLESS STEEL BORE SIZES FROM 1/8” TO 2”
STAINLESS STEEL COLLARS ARE CORROSION-RESISTANT AND NONMAGNETIC suitable for temperatures up to 800°F. Ideal for applications
requiring hygienic cleanliness.
ALL COLLARS COMPLETE WITH STANDARD HOLLOW POINT
SETSCREWS.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
SETSCREWS
BORE
OUTSIDE
DIA.
WIDTH
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
1/8-1
+ .001 + .003
1-1/16-3
+.001 +.004
Materials
Stainless Steel—Type 303 Austenitic.
Steel—Low Carbon, Zinc plated finish.
E
114
Boston Gear 800-825-6544
1/8
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-11/16
1-3/4
1-13/16
1-7/8
1-15/16
2
2-1/8
2-3/16
2-1/4
2-5/16
2-3/8
2-7/16
2-1/2
2-9/16
2-11/16
2-3/4
2-15/16
3
Outside
Diameter
Width
3/8
7/16
1/2
5/8
3/4
7/8
1/4
1/4
5/16
11/32
3/8
7/16
1
7/16
1-1/8
1/2
1-1/4
9/16
1-1/4
1-1/2
1-5/8
1-1/2
9/16
9/16
9/16
5/8
1-3/4
5/8
2
11/16
2-1/8
11/16
3/4
2-1/4
3/4
2-1/2
13/16
2-5/8
7/8
3
7/8
3-1/4
15/16
3-1/2
1
3-3/4
1
4
1-1/8
4
1-1/8
Alloy Steel
Catalog
Item
Number
Code
SC12
67697
SC18
67698
SC25
67699
SC31
67700
SC37
67701
SC43
67702
SC50
67703
SC56
67704
SC62
67705
SC68
67706
SC75
67707
SC81
67708
SC87
67709
SC93
67710
SC100
67711
SC106
67712
SC112
67713
SC118
67714
SC125
67715
SC131
67716
SC137
67717
SC143
67718
SC150
67719
SC156
67720
SC162
67721
SC168
67722
SC175
67723
SC181
67724
SC187
67725
SC193
67726
SC200
67727
SC212
67728
SC218
67729
SC225
67730
SC231
67731
SC237
67732
SC243
67733
SC250
67734
SC256
67735
SC268
67736
SC275
67737
SC293
67738
SC300
67739
Stainless Steel
Catalog
Item
Number
Code
SSC12
67740
SSC18
67741
SSC25
67742
SSC31
67743
SSC37
67744
—
—
SSC50
67745
—
—
SSC62
67746
—
—
SSC75
67747
—
—
SSC87
67748
—
—
SSC100 67749
—
—
SSC112 67784
—
—
SSC125 67785
—
—
—
—
—
—
SSC150 67788
—
—
—
—
—
—
SSC175 67789
—
—
—
—
—
—
SSC200 67790
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
P-1930-BG
04/10
Clamping Collars
CSC/CSSC Series
Threaded Type; Steel and Stainless Steel
DESIGN PROVIDES CONVENIENT SETTING, ADJUSTING AND REMOVAL
prevents shaft damage
OSHA CONFORMANCE collars have completely recessed screw head.
BORE THREADS FROM 10–32 TO 200–12
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
Thread
Outside
Dia.
10-32
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
1/2-13
1/2-20
5/8-11
5/8-18
3/4-10
3/4-16
7/8-9
7/8-14
1-8
1-14
1-1/8-7
1-1/8-12
1-1/4-7
1-1/4-12
1-1/2-6
1-1/2-12
1-3/4-16
2-12
11/16
13/16
1-1/16
1-1/4
1-1/2
1-3/4
1-7/8
2
2-1/8
2-1/4
2-1/2
3
3-1/4
Steel
Clamp
Catalog
Screws
Number
1/4
4-40 CSC10-32
CSC25-20
CSC25-28
1/4
4-40 CSC31-18
CSC31-24
CSC37-16
5/16
6-32 CSC37-24
CSC50-13
3/8
8-32 CSC50-20
CSC62-11
13/32 10-32 CSC62-18
CSC75-10
1/2
1/4-28 CSC75-16
CSC87-9
1/2
1/4-28 CSC87-14
CSC100-8
1/2
1/4-28 CSC100-14
CSC125-7
1/2
1/4-28 CSC112-12
CSC125-7
1/2
1/4-28 CSC125-12
CSC150-6
1/2
1/4-28 CSC150-12
5/8 5/16-24 CSC175-16
5/8 5/16-24 CSC200-12
Width
Item
Code
49237
49238
49239
49240
49241
49242
49243
49244
49245
49246
49247
49248
49249
49250
49251
49252
49253
49256
49255
49256
49257
49258
49259
49260
49261
Stainless Steel
Catalog
Item
Number
Code
—
—
CSSC25-20 49265
—
—
—
—
—
—
CSSC37-16 49269
CSSC37-24 49270
CSSC50-13 49271
CSSC50-20 49272
CSSC62-11 49273
CSSC62-18 49274
CSSC75-10 49275
CSSC75-16 49276
—
—
—
—
CSSC100-8 49279
CSSC100-14 49280
—
—
—
—
—
—
CSSC125-12 49284
—
—
—
—
—
—
—
—
OUTSIDE
DIA.
WIDTH
BORE
CLAMP SCREW
Materials
Steel—Low Carbon,
Black Oxide Finish
Stainless—Type 303 Austenitic
E
P-1930-BG
04/10
Boston Gear 800-825-6544
115
Clamping Collars
CSC/CSSC/CASC Series
1 Piece Type Steel, Stainless Steel and Aluminum
DESIGN PROVIDES CONVENIENT SETTING, ADJUSTING AND REMOVAL
prevents shaft damage
OSHA CONFORMANCE collars have completely recessed screw head.
BORE THREADS FROM 1/8” TO 3”
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Steel
Clamp
O.D. Width Screws Catalog Item
Number Code
1/8
CSC12 49000
3/16
CSC18 49001
1/4 13/16 1/4 4-40 CSC25 49002
5/16
CSC31 49003
3/8
CSC37 49004
7/16 1-1/16 5/16 6-32 CSC43 49005
1/2
CSC50 49006
9/16 1-1/4 3/8 8-32 CSC56 49007
5/8
CSC62 49008
11/16 1-1/2 13/32 10-32 CSC68 49009
3/4
CSC75 49010
13/16 1-3/4
CSC81 49011
7/8
CSC87 49012
15/16 1-7/8
CSC93 49013
1
CSC100 49014
1-1/16 2
CSC106 49015
1/2 1/4-28 CSC112 49016
1-1/8
1-3/16 2-1/8
CSC118 49017
1-3/8
CSC137 49020
1-5/16 2-3/8
CSC143 49021
1-1/2
CSC150 49022
1-9/16 2-1/2
CSC156 49023
1-5/8
CSC162 49024
1-11/16
CSC168 49025
3
1-3/4
CSC175 49026
1-7/8
CSC187 49028
1-15/16 3-1/4 5/8 5/16-24 CSC193 49029
2
CSC200 49030
2-3/16
CSC218 49033
2-1/4 3-1/2
CSC225 49034
2-3/8
CSC237 49036
2-7/16
CSC243 49037
2-1/2 4
CSC250 49038
2-5/8
CSC262 49040
2-11/164-1/4 3/4 3/8-24 CSC268 49041
2-3/4
CSC275 49042
2-7/8
CSC287 49044
2-15/16 4-1/2
CSC293 49045
3
CSC300 49046
Bore
OUTSIDE
DIA.
WIDTH
BORE
CLAMP SCREW
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
All
+ .003 – .000
Materials
Steel—Low Carbon
Black Oxide Finish Stainless—Type 303
Austenitic
Load Data
Capacity is based on a standard steel,
one-piece collar mounted with
recommended screw torque on a lightly
oiled shaft. Capacity is load to move
collar .010”. Data shown is for guidance
only. In applications involving control of
axial loads, capacity should be
determined experimentally on actual
parts involved.
Stainless Steel
Catalog Item
Number Code
CSSC12 49094
CSSC18 49095
CSSC25 49096
CSSC31 49097
CSSC37 49098
CSSC43 49099
CSSC50 49100
CSSC56 49101
CSSC62 49102
—
—
CSSC75 49104
—
—
CSSC87 49106
CSSC93 49107
CSSC100 49108
CSSC106 49109
CSSC112 49110
CSSC118 49111
—
—
CSSC143 49115
CSSC150 49116
—
—
—
—
—
—
—
—
—
—
CSSC193 49123
CSSC200 49124
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Aluminum
Catalog
Item
Number
Code
—
—
CASC18 49048
CASC25 49049
CASC31 49050
CASC37 49051
—
—
CASC50 49053
CASC56 49054
CASC62 49055
—
—
CASC75 49057
—
—
CASC87 49059
—
—
CASC100 49061
—
—
CASC125 49065
—
—
—
—
—
—
CASC150 49069
—
—
—
—
—
—
CASC175 49073
—
—
—
—
CASC200 49077
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
DIMENSION IN INCHES
E
Bore
1/8-5/16
3/8-7/16
1/2-9/16
5/8-11/16
3/4-1-9/16
1-5/8-2-3/8
2-7/16-3
116
Recommended
Screw Torque
(Lb. Ins.)
Stainless
Steel
Steel
4-40
20
16
6-32
30
24
8-32
55
35
10-32
90
72
1/4-28 220
170
5/16-24 435
340
3/8-24 710
550
Axial Load
Capacity Screw
Size
(Lbs.)
400
600
1400
1800
4000
6500
8500
Boston Gear 800-825-6544
P-1930-BG
04/10
Clamping Collars
2SC/2SSC Series
2 Piece Type Steel, Stainless Steel and Aluminum
DESIGN PROVIDES CONVENIENT SETTING, ADJUSTING AND REMOVAL
prevents shaft damage
OSHA CONFORMANCE collars have completely recessed screw head.
BORE THREADS FROM 1/4” TO 3”
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-11/16
1-3/4
1-13/16
1-7/8
1-15/16
2
2-1/16
2-1/8
2-3/16
2-1/4
2-3/8
2-7/16
2-1/2
2-5/8
2-11/16
2-3/4
2-7/8
2-15/16
3
O.D.
13/16
1-1/16
1-1/4
1-1/2
1-3/4
1-7/8
2
2-1/8
2-1/4
2-3/8
2-1/2
3
3-1/4
3-1/2
4
4-1/4
4-1/2
Steel
Clamp
Catalog
Item
Screws
Number
Code
2SC25
49143
1/4
4-40
2SC31
49144
2SC37
49145
5/16
6-32
2SC43
49146
2SC50
49147
3/8
8-32
2SC56
49148
2SC62
49149
13/32 10-32 2SC68
49150
2SC75
49151
2SC81
49152
2SC87
49153
2SC93
49154
2SC100
49155
2SC106
49156
2SC112
49157
1/2 1/4-28
49158
1/2 1/4-28 2SC118
2SC125
49159
2SC131
49160
2SC137
49161
2SC143
49162
2SC150
49163
2SC156
49164
2SC162
49165
2SC168
49166
2SC175
49167
—
—
2SC187
49169
2SC193
49170
2SC200
49171
—
—
5/8 5/16-24
2SC212
49173
2SC218
49174
2SC225
49175
2SC237
49177
2SC243
49178
2SC250
49179
2SC262
49181
3/4 3/8-24 2SC268
49182
49183
3/8-24 2SC275
3/4
2SC287
49185
2SC293
49186
2SC300
49187
Width
Stainless Steel
Catalog
Item
Number
Code
2SSC25
49190
2SSC31
49191
2SSC37
49192
2SSC43
49193
2SSC50
49194
2SSC56
49195
2SSC62
49196
2SSC68
49197
2SSC75
49198
—
—
2SSC87
49200
2SSC100
2SSC106
2SSC112
2SSC118
2SSC125
2SSC131
—
2SSC143
2SSC150
—
—
—
—
—
2SSC187
2SSC193
2SSC200
—
—
—
—
—
—
—
—
—
—
—
—
—
49202
49203
49204
49205
49206
49207
—
49209
49210
—
—
—
—
—
49216
49217
49218
—
—
—
—
—
—
—
—
—
—
—
—
—
OUTSIDE
DIA.
BORE
CLAMP SCREWS
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
04/10
All
+ .003 – .000
Materials
Steel—Low Carbon, Black Oxide Finish
Stainless—Type 303 Austenitic
Load Data
Capacity is based on a standard steel,
one-piece collar mounted with
recommended screw torque on a lightly
oiled shaft. Capacity is load to move
collar .010”. Data shown is for guidance
only. In applications involving control of
axial loads, capacity should be
determined experimentally on actual
parts involved.
DIMENSION IN INCHES
Bore
Recommended
Screw Torque
(Lb. Ins.)
Stainless
Steel
Steel
4-40
20
16
6-32
30
24
8-32
55
35
10-32
90
72
1/4-28 220
170
5/16-24 435
340
3/8-24 710
550
Axial Load
Capacity Screw
Size
(Lbs.)
1/8-5/16
3/8-7/16
1/2-9/16
5/8-11/16
3/4-1-9/16
1-5/8-2-3/8
2-7/16-3
P-1930-BG
WIDTH
400
600
1400
1800
4000
6500
8500
Boston Gear 800-825-6544
117
E
Thrust Washers
Steel and Stainless Steel
HARDENED AND GROUND STEEL BORE SIZES FROM 3/16” TO 2”
STAINLESS STEEL BORE SIZES FROM 3/16” TO 1/2”
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
3/16
1/4
5/16
3/8
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
O.D.
Thickness
06700 Series
+ .0015 + .0070
18000 Series
+ .002 + .007
06700 Series
+ .000 - .005
18000 Series
± .030
All
+.000 - .005
7/16
1/2
9/16
5/8
3/4
E
118
Boston Gear 800-825-6544
Outside Thick- Catalog
Diameter ness
Number
HARDENED STEEL
1/16
18800
9/32
3/32
18802
1/16
18804
3/8
3/32
18806
7/16
1/16
06724*
1/16
18808
1/2
3/32
18810
9/16
1/16
06726*
5/64
06728*
5/8
1/16
18812
1/8
18814
1/16
18816
5/8
1/8
18818
11/16
3/32
06730*
1/16
18820
7/8
5/32
18822
1/16
18824
3/4
1/8
18826
7/8
1/8
06734*
1/16
18828
1-1/8
5/32
18830
1-1/4
3/16
18832
3/32
18834
1-3/8
3/16
18836
1/16
18838
25/32
1/8
18840
3/32
18842
1-1/4
3/16
18844
1-3/8
3/16
18846
3/32
18848
1-1/2
3/16
18850
1-3/4
3/16
18852
1
3/32
18854
3/32
18856
1-5/16
3/16
18858
1/8
18860
1-5/8
3/16
18862
1-3/4
3/16
18864
2
3/16
18866
Bore
7/8
7/16
1
1-1/16
1-1/8
1-3/16
1-1/4
1-5/16
1-3/8
1-1/2
2
3/16
1/4
5/16
3/8
1/2
Outside Thick- Catalog
Diameter ness
Number
HARDENED STEEL
1-3/16
3/32
18868
2
1/8
18870
2
3/16
18872
2-1/4
3/16
18874
13/16
3/32
06732*
1/8
18876
1-9/16
3/16
18878
1/8
18880
2
3/16
18882
9/64
18884
2-1/4
3/16
18886
2-1/2
1/4
18888
2-1/2
1/4
18890
2-1/2
1/4
18894
2
3/16
18896
9/64
18898
2
3/16
18922
9/64
18900
2-7/16
1/4
18924
2-3/4
9/64
18902
3
1/4
18904
2-3/4
1/4
18906
5/32
18908
3
1/4
18910
5/32
18912
3
1/4
18914
3-1/4
1/8
18916
5/32
18918
4
5/16
18920
STAINLESS STEEL†
7/16
1/16
06760
9/16
1/16
06762
5/8
5/64
06764
11/16
3/32
06766
7/8
1/8
06770
*These washers also listed with AO Bearings.
†These washers also listed with SAO Bearings.
P-1930-BG
04/10
Bushings
Soft Steel
BORE SIZES FROM 3/16” TO 1-1/4”
MULTI-PURPOSE BUSHINGS suitable for use was hole reducers, spacers,
standoffs or slip bushings.
ADAPTABLE FOR OTHER USES including wear sleeves, liners or cutting
arbor studs.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER
Bore
3/16
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
Outside ThickDiameter ness
1/4
5/16
5/8
3/8
5/16
5/8
3/8
3/4
1/2
1
3/8
5/8
3/4
1/2
1
3/4
1/2
1
3/4
5/8
1-1/4
3/4
5/8
1-1/4
3/4
5/8
1
1-1/4
3/4
3/4
1
3/4
3/4
1
7/8
1-1/4
7/8
1-1/4
1
1-1/2
1-3/8
2
1-1/2
1-1/2
1
1-1/2
1-1/4
1-3/8
2
2
1-1/4
2
1-3/8
2
1-1/2
1-1/2
2
3
Catalog
Number
18510
18512
18516
18514
18518
18522
18524
18520
18526
18528
18530
18532
18534
18536
18538
18540
18542
18544
18546
18554
18556
18560
18562
18566
18568
18574
18626
18606
18576
18596
18602
18622
18598
18604
18614
18624
BORE
OUTSIDE
DIA.
LENGTH
STANDARD TOLERANCES
Dimensions
Tolerance
BORE
O.D.
LENGTH
All
± .0005
Up to 1-1/4 + .0005 +.0015
Over 1-1/4
+ .001 +.002
Up to 1"
+.000 -.007
Over 1"
+.000 -.010
E
P-1930-BG
04/10
Boston Gear 800-825-6544
119
Grooved Pulleys
G1200
Round Belt Type
BRASS IRON AND STEEL
BORE SIZES FROM 3/16” TO 3/4”
COMPLETE WITH STANDARD SETSCREWS
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
3/16
1/4
FACE
WIDTH
5/16
SETSCREW
OUTSIDE
DIA.
BORE
HUB
DIA.
1/2
5/8
HUB
PROJ.
3/4
Outside Hub
V
Catalog
Project
Style
Diameter Dia.
Groove
Number
BRASS—3/16” ROUND BELT (or smaller)—1/4” FACE
1/2
1/2
74°
G1214
1/4
Plain
7/8
5/8
46°
G1215
1
G1216
5/8
5/16
46°
Plain
1-1/2
G1217
2
5/8
Webbed G1218
3
3/4
5/16
46°
Spoked G1219
4
3/4
Spoked G1220
IRON†—3/8” ROUND BELTS (or smaller)—1/2” FACE
1
15/16
G1202
1-1/2
1
Plain
G1203
1/2
2
1
G1204
3
1-1/4
53°
G1205
4
Webbed G1206
5
1-5/8
3/4
G1207
6
G1208
Spoked
8
1-3/4
1
G1209
Item
Code
18700
18702
18704
18706
18708
18710
18712
18718
18720
18722
18724
18726
18728
18730
18732
†Outside diameter, sides, grooves, hole and ends of hub finished.
STANDARD TOLERANCES
Dimensions
Tolerance
BORE
All
+.001 - .000
E
120
Boston Gear 800-825-6544
P-1930-BG
04/10
Miniature Timing Belts and Pulleys
Miniature HTD Timing Belt Drives
Basic Construction
Timing belts are essentially flat belts with the addition of evenly
spaced teeth along the surface that contacts toothed pulleys.
Power is transmitted smoothly and without slippage. Pulley
pitch diameters are larger than their outside diameters and the
belt pitch lines lie within the flat portion. Tension members are
molded in the flat portion to serve as load-carrying elements.
Miniature HTD timing belts have deep curvilinear tooth forms,
as contrasted to trapezoidal for conventional timing belts.
Greater strength, lower tooth pressures and decreased stress
concentration result in superior performance.
Selection
The following general guidelines apply to selection of
miniature HTD timing belts and pulleys:
Design with ample reserve horsepower capacity and apply the
proper service factors.
The belt must have six or more teeth in engagement with the
smaller pulley to carry rated Horsepower.
Avoid small pulley diameters where practical to assure
satisfactory belt life.
Belt speed should not exceed 6500 feet per minute.
At least one pulley in the drive should be flanged.
For vertical shafts or where center distance exceeds eight
times the smaller pulley diameter, both pulleys should be
flanged.
Horsepower Rating Tables provide ratings for operation no
more than ten hours per day under uniform loading. Selection
procedures is as follows:
1. Select Service Factor for chart below.
2. Determine Design Horsepower.
Design Horsepower = Application Horsepower x Service Factor
3. Select small pulley and belt size from the rating tables,
choosing a combination whose rating does not exceed
the Design Horsepower.
4. For speed increasing applications an additional amount
must be added to the Service Factor.
5. For speeds higher than shown in Rating Tables, consult
factory.
SERVICE FACTORS
Service
Factor
Load Classification
Uniform to 10 hrs./day
Uniform over 10 hrs./day
Moderate Shock to 10 hrs./day
Moderate Shock over 10 hrs/day
Heavy Shock to 10 hrs./day
1.0
1.5
2.0
SPEED-UP DRIVES
Ratio Range
1 through 1.24
1.25 through 1.74
1.75 through 2.49
2.50 through 3.49
3.50 and over
Additional
Factor
0
0.1
0.2
0.3
0.4
E
P-1930-BG
04/10
Boston Gear 800-825-6544
121
Miniature Timing Belts and Pulleys
Miniature HTD Timing Belt Drives (Continued)
Horsepower Ratings
3mm Pitch—6mm Wide Belt
RPM of Small Pulley
NUMBER OF GROOVES ON THE SMALL PULLEY
PD
100
300
500
700
1160
1500
1750
2500
3500
10
11
12
14
15
16
18
20
22
24
25
28
30
32
.376
.005
.016
.022
.031
.040
.052
.061
.067
.094
.414
.005
.017
.024
.035
.045
.058
.068
.074
.103
.451
.006
.018
.027
.037
.050
.064
.075
.080
.113
.526
.007
.021
.030
.042
.056
.072
.085
.091
.127
.564
.008
.023
.032
.046
.061
.078
.091
.101
.141
.602
.009
.025
.035
.049
.066
.085
.099
.107
.151
.677
.010
.029
.039
.054
.072
.093
.108
.117
.165
.752
.011
.033
.043
.061
.078
.101
.117
.134
.188
.827
.012
.037
.048
.068
.089
.115
.134
.148
.207
.902
.013
.040
.053
.075
.097
.125
.146
.161
.226
.940
.013
.041
.055
.078
.101
.130
.152
.168
.236
1.053
.016
.048
.062
.087
.113
.145
.170
.192
.268
1.128
.019
.055
.066
.092
.120
.155
.182
.200
.278
1.203
.020
.059
.070
.098
.127
.165
.194
.213
.296
3mm Pitch—9mm Wide Belt
RPM of Small Pulley
NUMBER OF GROOVES ON THE SMALL PULLEY
PD
100
300
500
700
1160
1500
1750
2500
3500
10
11
12
14
15
16
18
20
22
24
25
28
30
32
.376
.007
.025
.035
.049
.063
.082
.097
.106
.149
.414
.008
.027
.038
.056
.071
.092
.108
.117
.163
.451
.009
.029
.043
.059
.079
.101
.119
.127
.179
.526
.011
.033
.048
.067
.089
.114
.135
.144
.201
.564
.013
.036
.051
.073
.097
.123
.144
.160
.223
.602
.014
.040
.055
.078
.104
.135
.157
.169
.239
.677
.016
.046
.062
.085
.114
.147
.171
.185
.262
.752
.017
.052
.068
.096
.123
.160
.185
.212
.298
.827
.019
.059
.076
.107
.141
.182
.212
.235
.328
.902
.021
.063
.084
.119
.154
.198
.231
.255
.358
.940
.022
.066
.088
.124
.160
.206
.241
.266
.372
1.053
.025
.076
.098
.138
.179
.230
.269
.304
.425
1.128
.030
.087
.104
.146
.190
.246
.289
.317
.441
1.203
.032
.092
.111
.156
.203
.263
.308
.338
.470
25
1.566
.053
.159
.206
.291
.375
.484
.562
.613
.856
28
1.754
.063
.186
.231
.324
.420
.543
.633
.687
.960
30
1.880
.069
.204
.249
.348
.447
.579
.675
.735
1.03
5mm Pitch—9mm Wide Belt
RPM of Small Pulley
NUMBER OF GROOVES ON THE SMALL PULLEY
PD
100
300
500
700
1160
1500
1750
2500
3500
11
.689
.021
.063
.090
.129
.162
.210
.243
.267
.372
12
.752
.024
.069
.099
.138
.180
.231
.270
.291
.405
14
.877
.027
.081
.117
.162
.207
.270
.315
.342
.477
15
.940
.030
.090
.126
.174
.225
.291
.339
.366
.510
16
1.003
.033
.096
.132
.186
.240
.309
.360
.393
.549
18
1.128
.039
.108
.150
.210
.270
.348
.405
.441
.615
20
1.253
.042
.126
.165
.231
.300
.387
.453
.492
.690
22
1.379
.045
.138
.183
.255
.327
.423
.495
.540
.756
24
1.504
.051
.153
.198
.279
.360
.465
.540
.588
.822
E
122
Boston Gear 800-825-6544
P-1930-BG
04/10
Miniature Timing Belts and Pulleys
Miniature HTD Timing Belt Drives (Continued)
Horsepower Ratings
5mm Pitch—15mm Wide Belt
NUMBER OF GROOVES ON THE SMALL PULLEY
RPM of Small Pulley
PD
100
300
500
700
1160
1500
1750
2500
3500
11
12
14
15
16
18
20
22
24
28
30
.689
.038
.115
.164
.236
.296
.384
.445
.489
.681
.752
.043
.126
.181
.252
.329
.423
.494
.533
.742
.877
.049
.148
.214
.296
.379
.494
.577
.626
.874
.940
.054
.164
.230
.318
.412
.533
.621
.670
.934
1.003
.060
.175
.241
.340
.439
.566
.649
.720
1.00
1.128
.071
.197
.274
.384
.494
.637
.742
.808
1.12
1.253
.076
.230
.302
.423
.549
.709
.830
.901
1.26
1.379
.082
.252
.335
.467
.599
.775
.907
.989
1.38
1.504
.093
.280
.362
.511
.659
.852
.989
1.07
1.50
1.754
.115
.340
.423
.593
.769
.995
1.16
1.25
1.75
1.880
.126
.373
.456
.637
.819
1.06
1.23
1.34
1.88
Belt life will be reduced for ratings to the left of the heavy line.
Center Distance
Installation Suggestions
To calculate the approximate Belt Length:
1. Use care in handling belts to avoid breakage of the
reinforcing fibers.
BL = 2C +
D1 – D2
+ 1.57 (D1 + D2)
4C
An approximate formula for center distance of a timing
belt drive is:
2. Make sure shafts are parallel and pulleys in
alignment.
3. Belt should fit snugly, neither too loose nor too tight.
Avoid preload, which can cause premature failure.
4. Provision for some Center Distance adjustment will
ease the installation and permit proper initial fitting of
belts.
BL = 2C +
(D1 – D2)
4C
+ 1.57 (D1 + D2)
Where:
C = Center Distance—Inches
P = Belt Pitch—Inches
NB = Number of Teeth in Belt
N1 = Number of Grooves in larger Pulley
N2 = Number of Grooves in smaller Pulley
BL = Belt Length
D1 = Pitch Diameter of larger Pulley
E
D2 = Pitch Diameter of smaller Pulley
P-1930-BG
04/10
Boston Gear 800-825-6544
123
Miniature HTD Timing Belts
®
3M Series 6 and 9mm Widths
3mm Pitch
NEOPRENE–NYLON COVERED, FIBERGLASS REINFORCED
AMBIENT TEMPERATURE RANGE— –18°C TO +85°C
BREAKING STRENGTH–6 mm WIDTH – 74.4 KGS
9 mm WIDTH – 111.6 KGS
3 MM.
.118 IN.
2.41 MM.
.095 IN.
1.17 MM.
.046 IN.
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
of
Grooves
35
37
48
49
50
52
53
56
59
60
65
67
68
69
70
71
75
78
80
84
85
89
90
92
94
95
96
97
99
100
104
106
111
112
113
115
119
E
®
Pitch Length
mm
Inch
105
111
144
147
150
156
159
168
177
180
195
201
204
207
210
213
225
234
240
252
255
267
270
276
282
285
288
291
297
300
312
318
333
336
339
345
357
4.134
4.370
5.669
5.787
5.905
6.142
6.260
6.614
6.968
7.087
7.677
7.913
8.031
8.150
8.268
8.386
8.858
9.213
9.449
9.921
10.039
10.512
10.630
10.866
11.102
11.220
11.339
11.457
11.693
11.811
12.283
12.520
13.110
13.228
13.346
13.583
14.055
6mm Belt Width
Catalog
Item
Number
Code
9mm Belt Width
Catalog
Item
Number
Code
3M035060
3M037060
3M048060
3M049060
3M050060
3M052060
3M053060
3M056060
3M059060
3M060060
3M065060
3M067060
3M068060
3M069060
3M070060
3M071060
3M075060
3M078060
3M080060
3M084060
3M085060
3M089060
3M090060
3M092060
3M094060
3M095060
3M096060
3M097060
3M099060
3M100060
3M104060
3M106060
3M111060
3M112060
3M113060
3M115060
3M119060
3M035090
3M037090
3M048090
3M049090
3M050090
3M052090
3M053090
3M056090
3M059090
3M060090
3M065090
3M067090
3M068090
3M069090
3M070090
3M071090
3M075090
3M078090
3M080090
3M084090
3M085090
3M089090
3M090090
3M092090
3M094090
3M095090
3M096090
3M097090
3M099090
3M100090
3M104090
3M106090
3M111090
3M112090
3M113090
3M115090
3M119090
54214
54215
54216
54217
54218
54219
54220
54221
54222
54223
54224
54225
54226
54227
54228
54229
54230
54231
54232
54233
54234
54236
54237
54238
54239
54240
54241
54242
54243
54244
54245
54246
54247
54248
54249
54250
54251
54290
54291
54292
54293
54294
54295
54296
54297
54298
54299
54300
54301
54302
54303
54304
54305
54306
54307
54308
54309
54310
54312
54313
54314
54315
54316
54317
54318
54319
54320
54321
54322
54323
54324
54325
54326
54327
Number
of
Grooves
121
128
130
132
140
145
149
153
155
158
160
162
163
167
171
175
177
179
188
192
199
200
204
211
223
237
250
251
294
315
354
375
415
421
500
510
621
Pitch Length
mm
Inch
363
384
390
396
420
435
447
459
465
474
480
486
489
501
513
525
531
537
564
576
597
600
612
633
669
711
750
753
892
945
1062
1125
1245
1263
1500
1530
1863
14.291
15.118
15.354
15,591
16.535
17.126
17.598
18.071
18.307
18.661
18.898
19.134
19.252
19.724
20.197
20.670
20.905
21.142
22.205
22.677
23.504
23.622
24.094
24.921
26.338
27.992
29.527
29.646
34.724
37.205
41.811
44.291
49.016
49.724
59.055
60.235
73.346
6mm Belt Width
Catalog
Item
Number
Code
9mm Belt Width
Catalog
Item
Number
Code
3M121060
3M128060
3M130060
3M132060
3M140060
3M145060
3M149060
3M153060
3M155060
3M158060
3M160060
3M162060
3M163060
3M167060
3M171060
3M175060
3M177060
3M179060
3M188060
3M192060
3M199060
3M200060
3M204060
3M211060
3M223060
3M237060
3M250060
3M251060
3M294060
3M315060
3M354060
3M375060
3M415060
3M421060
3M500060
3M510060
3M621060
3M121090
3M128090
3M130090
3M132090
3M140090
3M145090
3M149090
3M153090
3M155090
3M158090
3M160090
3M162090
3M163090
3M167090
3M171090
3M175090
3M177090
3M179090
3M188090
3M192090
3M199090
3M200090
3M204090
3M211090
3M223090
3M237090
3M250090
3M251090
3M294090
3M315090
3M354090
3M375090
3M415090
3M421090
3M500090
3M510090
3M621090
54252
54253
54254
54255
54256
54257
54258
54259
54260
54261
54262
54263
54264
54265
54266
54267
54268
54269
54270
54271
54272
54273
54274
54275
54276
54277
54278
54279
54280
54281
54282
54283
54284
54285
54286
54287
54288
54328
54329
54330
54331
54332
54333
54334
54335
54336
54337
54338
54339
54340
54341
54342
54343
54344
54345
54346
54347
54348
54349
54350
54351
54352
54353
54354
54355
54356
54357
54358
54360
54361
54362
54363
54364
54365
Registered trademark of UNIROYAL, INC.
124
Boston Gear 800-825-6544
P-1930-BG
04/10
Timing Belt Pulleys
PA Series For 6mm Wide Belts
3mm Pitch; Aluminum
ALUMINUM ALLOY – CLEAR ANODIZED
COMPLETE WITH SETSCREWS
WITH FLANGES
10 TO 17 GROOVES
WITH FLANGES
18 TO 44 GROOVES
L
SETSCREW
D
FACE
L
D/2
FACE
D
D/2
SETSCREW
O.D.
C
O.D.
C
BORE
FLANGE
DIAMETER
FLANGE
DIAMETER
BORE
WITHOUT FLANGES
STANDARD TOLERANCES
L
Dimensions
D
FACE
Bore
All
10-26 Grooves
O.D. 28-48 Grooves
60-72 Grooves
D/2
O.D.
C
Tolerance
+.001 to –.000
+.002 to –.000
+.003 to –.000
+.004 to –.000
BORE
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
of
Grooves
10
11
12
13
14
15
16
17
18
19
20
22
24
25
26
28
30
32
34
36
38
40
44
48
50
56
60
62
72
Pitch
Dia. O.D.
.376
.414
.451
.489
.526
.564
.602
.639
.677
.714
.752
.827
.902
.940
.977
1.053
1.128
1.203
1.278
1.353
1.429
1.504
1.654
1.805
1.880
2.105
2.256
2.331
2.707
B
Face
Width
.346 .125
.384
.421
.459
.282
.496 .1875
.534
.572
.609
.647
.684
.722
.797
.872
.386
.910
.947 .250
1.023
1.098
1.173
1.248
1.323
1.399
1.474
1.624
1.775
.407
1.850
2.075
2.226 .3125
2.301
2.677
C
.505
.530
.580
.610
.635
.685
.710
.740
.442
.468
.500
.562
.625
.625
.625
.701
.776
.851
.921
1.000
1.075
1.150
1.300
1.250
With Flanges
Flange
Item
Dia. Setscrew* Catalog
Number
Code
.505
PA3010DF060 54448
#4–40
.530
PA3011DF060 54449
.580
PA3012DF060 54450
.610
PA3013DF060 54451
15/64 9/16 .635
PA3014DF060
54452
#6–40
.685
PA3015DF060 54453
.710
PA3016DF060 54454
.740
PA3017DF060 54455
.790
PA3018DF060 54456
.815
PA3019DF060 54457
.895
PA3020DF060 54458
.945
PA3022DF060 54459
11/16 1.025
PA3024DF060 54460
1.060
PA3025DF060 54461
1.105
PA3026DF060 54462
19/64
1.173
PA3028DF060 54463
1.250
PA3030DF060 54464
1.323
PA3032DF060 54465
1.398
#8–32
PA3034DF060 54466
1.473
PA3036DF060 54467
23.32 1.549
PA3038DF060 54468
1.625
PA3040DF060 54469
1.775
PA3044DF060 54470
–
–
–
–
–
–
–
–
–
21/64 47/64 –
–
–
–
–
–
–
–
–
D
L
Without Flanges
Catalog
Item
Number
Code
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
PA3018NF060 54471
PA3019NF060 54472
PA3020NF060 54473
PA3022NF060 54474
PA3024NF060 54475
PA3025NF060 54476
PA3026NF060 54477
PA3028NF060 54478
PA3030NF060 54479
PA3032NF060 54480
PA3034NF060 54481
PA3036NF060 54482
PA3038NF060 54483
PA3040NF060 54484
PA3044NF060 54485
PA3048NF060 54486
PA3050NF060 54487
PA3056NF060 54488
PA3060NF060 54489
PA3062NF060 54490
PA3072NF060 54991
*Pulleys with 10 to 13 grooves have one setscrew. All others have two at 90°
P-1930-BG
04/10
Boston Gear 800-825-6544
125
E
Timing Belt Pulleys
PA Series For 9mm Wide Belts
3mm Pitch; Aluminum
ALUMINUM ALLOY – CLEAR ANODIZED
COMPLETE WITH SETSCREWS
WITH FLANGES
10 TO 17 GROOVES
WITH FLANGES
18 TO 44 GROOVES
L
SETSCREW
D
FACE
L
D/2
D
FACE
D/2
SETSCREW
O.D.
C
O.D.
C
BORE
FLANGE
DIAMETER
FLANGE
DIAMETER
BORE
WITHOUT FLANGES
STANDARD TOLERANCES
Dimensions
Bore
L
Tolerance
All
10-26 Grooves
O.D. 28-48 Grooves
60-72 Grooves
FACE
+.001 to –.000
+.002 to –.000
+.003 to –.000
+.004 to –.000
D
D/2
O.D.
C
BORE
ORDER BY CATALOG NUMBER OR ITEM CODE
E
Number
of
Grooves
10
11
12
13
14
15
16
17
18
19
20
22
24
25
26
28
30
32
34
36
38
40
44
48
50
56
60
62
72
Pitch
Dia. O.D.
.376
.414
.451
.489
.526
.564
.602
.639
.677
.714
.752
.827
.902
.940
.977
1.053
1.128
1.203
1.278
1.353
1.429
1.504
1.654
1.805
1.880
2.105
2.256
2.331
2.707
.346
.384
.421
.459
.496
.534
.572
.609
.647
.684
.722
.797
.872
.910
.947
1.023
1.098
1.173
1.248
1.323
1.399
1.474
1.624
1.775
1.850
2.075
2.226
2.301
2.677
B
Face
Width
.125
.401
.1875
.506
.250
.527
.3125
.500
With Flanges
Flange
Setscrew*
Catalog
Item
Dia.
Number
Code
.505
.505
PA3010DF090 54492
#4–40
.530
.530
PA3011DF090 54493
.580
.580
PA3012DF090 54494
.610 15/64 11/16 .610
PA3013DF090 54495
.635
.635
PA3014DF090 54496
.685
.685
#6–40 PA3015DF090 54497
.710
.710
PA3016DF090 54498
.740
.740
PA3017DF090 54499
.442
.790
PA3018DF090 54500
.468
.815
PA3019DF090 54501
.500
.895
PA3020DF090 54502
.562
.945
PA3022DF090 54503
.625
13/16 1.025
PA3024DF090 54504
.625
1.060
PA3025DF090 54505
.625
1.105
PA3026DF090 54506
.701 19/64
1.173
PA3028DF090 54507
.776
1.250
PA3030DF090 54508
.851
1.323
PA3032DF090 54509
.921
1.398
#8–32 PA3034DF090 54510
1.000
1.473
PA3036DF090 54511
1.075
27/32 1.549
PA3038DF090 54512
1.150
1.625
PA3040DF090 54513
1.300
1.775
PA3044DF090 54514
–
–
–
–
–
–
–
–
–
1.250 3/8
7/8
–
–
–
–
–
–
–
–
–
C
D
L
Without Flanges
Catalog
Item
Number
Code
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
PA3018NF090 54515
PA3019NF090 54516
PA3020NF090 54517
PA3022NF090 54518
PA3024NF090 54519
PA3025NF090 54520
PA3026NF090 54521
PA3028NF090 54522
PA3030NF090 54523
PA3032NF090 54524
PA3034NF090 54525
PA3036NF090 54526
PA3038NF090 54527
PA3040NF090 54528
PA3044NF090 54529
PA3048NF090 54530
PA3050NF090 54531
PA3056NF090 54532
PA3060NF090 54533
PA3062NF090 54534
PA3072NF090 54535
*Pulleys with 10 to 13 grooves have one setscrew. All others have two at 90°
126
Boston Gear 800-825-6544
P-1930-BG
04/10
Timing Belt Pulleys
PL Series For 9mm Wide Belts
3mm Pitch; Lexan
LEXAN – FIBERGLASS REINFORCED
SINGLE FLANGE
10-28 GROOVES
SINGLE FLANGE
32-120 GROOVES
L
L
FACE
3/16
D
1/2
D
C F.D.
O.D. B
O.D.
F.D.
B
C
FACE
DOUBLE FLANGE
10-28 GROOVES
DOUBLE FLANGE
32-80 GROOVES
Bore
L
L
STANDARD TOLERANCES
Dimension
Tolerances
All
+.001 to –.000
D
D
C
O.D. B
O.D.
F.D.
F.D.
B
C
3/16
FACE
FACE
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
of
Grooves
10
11
12
13
14
15
16
17
18
19
20
22
25
28
32
36
40
48
60
72
80
84
96
120
Pitch
Dia. O.D.
.376
.414
.451
.489
.526
.564
.602
.639
.677
.714
.752
.827
.940
1.053
1.203
1.353
1.504
1.805
2.256
2.707
3.008
3.158
3.609
4.511
B
.346
.384
.421
.459
.496
.534 3/16
.572
.609
.647
.684
.722
.797
.910
1.023
1.173
1.323 1/4
1.474
1.775
2.226
2.677
2.978 5/16
3.128
3.579
4.481 3/8
Face
Width
C
D
5/8
11/16
1/4
7/16
3/4
7/8
5/16
1/2
1
3/8
Single Flange
Flange
Catalog
Item
Dia.
Number
Code
PL3010SF090
54536
.63
PL3011SF090
54537
3/4*
PL3012SF090
54538
PL3013SF090
54539
.69
PL3014SF090
54540
.73
PL3015SF090
54541
.78
PL3016SF090
54542
.87
PL3017SF090
54543
.93
PL3018SF090
54544
.93
PL3019SF090
54545
.93
PL3020SF090
54546
13/16
1.06 PL3022SF090
54547
1.19 PL3025SF090
54548
1.24 PL3028SF090
54549
1.44 PL3032SF090
54550
1.57 PL3036SF090
54551
1.76 PL3040SF090
54552
2.02 PL3048SF090
54553
2.46 PL3060SF090
54554
13/16** 2.92 PL3072SF090
54555
3.29 PL3080SF090
54556
3.38 PL3084SF090
54557
13/16
3.83 PL3096SF090
54558
7/8
–
PL3120NF090†
54559
L
Double Flange
Catalog
Item
Number
Code
PL3010DF090 54560
PL3011DF090 54561
PL3012DF090 54562
PL3013DF090 54563
PL3014DF090 54564
PL3015DF090 54565
PL3016DF090 54566
PL3017DF090 54567
PL3018DF090 54568
PL3019DF090 54569
PL3020DF090 54570
PL3022DF090 54571
PL3025DF090 54572
PL3028DF090 54573
PL3032DF090 54574
PL3036DF090 54575
PL3040DF090 54576
PL3048DF090 54577
PL3060DF090 54578
PL3072DF090 54579
PL3080DF090 54580
–
–
–
–
–
–
*13/16” for Double Flanges
**7/8” for Double Flanges
†No Flange
P-1930-BG
04/10
Boston Gear 800-825-6544
127
E
Timing Belt Pulleys
PLB Series For 9mm Wide Belts
3mm Pitch; Lexan
LEXAN – FIBERGLASS REINFORCED
KNURLED ALUMINUM INSERTS
COMPLETE WITH SETSCREWS
SINGLE FLANGE
10-16 GROOVES
SINGLE FLANGE
17-28 GROOVES
L
SETSCREW
D
1
8
L
SETSCREW
5
32
D
A C F.D.
O.D. B
O.D.
SPOT
DRILL
FACE
A C F.D.
B
3
16
SPOT DRILL
FACE
DOUBLE FLANGE
10-16 GROOVES
STANDARD TOLERANCES
Dimension
Bore
All
Tolerance
+.001 to –.000
DOUBLE FLANGE
17-28 GROOVES
SETSCREW
L
D
5
32
L
D
1
8
O.D. B
SETSCREW
A
FACE
C
F.D.
SPOT
DRILL
O.D.
B
A C
3
16
FACE
F.D.
SPOT DRILL
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
of
Grooves
10
11
12
13
14
15
16
17
18
19
20
E
22
25
28
128
Single Flange
Flange SetCatalog
Item
Dia. screw
Number
Code
.376 .346
PLB3010SF090
54581
.414 .384
5/8
3/4
.63
PLB3011SF090
54582
.451 .421
PLB3012SF090
54583
.489 .459 3/16
PLB3013SF090
54584
.526 .496
.69
PLB3014SF090
54585
.564 .534
.73
PLB3015SF090
54586
.602 .572
.78
PLB3016SF090
54587
3/16
3/8
.87 #6–32 PLB3017SF09-3/16 54588
.639 .609 1/4
PLB3017SF09-1/4 54589
3/16
11/16 1/4
PLB3018SF09-3/16 54590
.677 .647 1/4
PLB3018SF09-1/4 54591
7/16
PLB3019SF09-3/16 54592
.93
.714 .684 3/16
PLB3019SF-09-1/4 54593
3/16
13/16
PLB3020SF09-3/16 54594
.752 .722 1/4
PLB3020SF09-1/4 54595
.827 .797 3/16
1.06
PLB3022SF09-3/16 54596
1/4
PLB3025SF09-1/4 54598
.940 .910 5/16
PLB3025SF09-5/16 54599
1.19
3/8
PLB3025SF09-3/8 54600
3/4
1/2
#8–32 PLB3028SF09-1/4 54601
1/4
1.053 1.023 5/16
1.24
PLB3028SF09-5/16 54602
3/8
PLB3028SF09-3/8 54603
Pitch O.D.
Dia.
B
Face
Width
Boston Gear 800-825-6544
C
D Insert L
Dia.
Double Flanges
Catalog
Item
Number
Code
PLB3010DF090
54633
PLB3011DF090
54634
PLB3012DF090
54635
PLB3013DF090
54636
PLB3014DF090
54637
PLB3015DF090
54638
PLB3016DF090
54639
PLB3017DF09-3/16 54640
PLB3017DF09-1/4
54641
PLB3018DF09-3/16 54642
PLB3018DF09-1/4
54643
PLB3019DF09-3/16 54644
PLB3019DF09-1/4
54645
PLB3020DF09-3/16 54646
PLB3020DF09-1/4
54647
PLB3022DF09-3/16 54649
PLB3025DF09-1/4
54650
PLB3025DF09-5/16 54651
PLB3025DF09-3/8
54652
PLB3028DF09-1/4
54653
PLB3028DF09-5/16 54654
PLB3028DF09-3/8
54655
P-1930-BG
04/10
Timing Belt Pulleys
PLB Series For 9mm Wide Belts
3mm Pitch; Lexan
LEXAN – FIBERGLASS REINFORCED
KNURLED ALUMINUM INSERTS
COMPLETE WITH SETSCREWS
SINGLE FLANGE
DOUBLE FLANGE
SETSCREW
SETSCREW
L
D
5
32
L
D
5
32
O.D.
O.D.
A C F.D.
A C
B
F.D.
STANDARD TOLERANCES
Dimension
Tolerance
B
3
16
FACE
Bore
3
16
SPOT DRILL
FACE
All
+.001 to –.000
SPOT DRILL
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
Pitch
O.D.
of
Grooves Dia.
32
36
40
48
60
72
80
84
96
120
B
1/4
1.203 1.173 5/16
3/8
1/4
1.353 1.323 5/16
3/8
1/4
1.504 1.474 5/16
3/8
1/4
1.805 1.775 5/16
3/8
5/16
2.256 2.226 3/8
1/2
5/16
2.707 2.677 3/8
1/2
5/16
3.008 2.978 3/8
1/2
5/16
3.158 3.128 3/8
1/2
5/16
3.609 3.579 3/8
1/2
4.511 4.481 3/8
1/2
Face
Width
C
3/4
7/16
7/8
1
1/2
Single Flange
Flange SetCatalog
Dia. screw
Number
PLB3032SF09-1/4
1.44
PLB3032SF09-5/16
PLB3032SF09-3/8
PLB3036SF09-1/4
1.57
PLB3036SF09-5/16
PLB3036SF09-3/8
1/4 1/2 13/16
#8–32 PLB3040SF09-1/4
1.76
PLB3040SF09-5/16
PLB3040SF09-3/8
PLB3048SF09-1/4
2.02
PLB3048SF09-5/16
PLB3048SF09-3/8
PLB3060SF09-5/16
2.46
PLB3060SF09-3/8
PLB3060SF09-1/2
PLB3072SF09-5/16
13/16† 2..92
PLB3072SF09-3/16
PLB3072SF09-1/2
PLB3080SF09-5/16
5/16 5/8
3.29 #10–32 PLB3080SF09-3/8
PLB3080SF09-1/2
PLB3084SF09-5/16
3.38
PLB3084SF09-3/8
PLB3084SF09-1/2
13/16
PLB3096SF09-5/16
3.83
PLB3096SF09-3/8
PLB3096SF09-1/2
PLB3120NF09-3/8*
3/8
7/8
–
PLB3120NF09-1/2*
D
Insert
Dia.
L
Item
Code
54604
54605
54606
54607
54608
54609
54610
54611
54612
54613
54614
54615
54616
54617
54618
54619
54620
54621
54622
54623
54624
54625
54626
54627
54628
54629
54630
54631
54632
Double Flanges
Catalog
Item
Number
Code
PLB3032DF09-1/4
54656
PLB3032DF09-5/16 54657
PLB3032DF09-3/8
54658
PLB3036DF09-1/4
54659
PLB3036DF09-5/16 54660
PLB3036DF09-3/8
54661
PLB3040DF09-1/4
54662
PLB3040DF09-5/16 54663
PLB3040DF09-3/8
54664
PLB3048DF09-1/4
54665
PLB3048DF09-5/16 54666
PLB3048DF09-3/8
54667
PLB3060DF09-5/16 54668
PLB3060DF09-3/8
54669
PLB3060DF09-1/2
54670
PLB3072DF09-5/16 54671
PLB3072DF09-3/8
54672
PLB3072DF09-1/2
54673
PLB3080DF09-5/16 54674
PLB3020DF09-3/8
54675
PLB3080DF09-1/2
54676
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
†7/8” for Double Flange
*No Flange
P-1930-BG
04/10
Boston Gear 800-825-6544
129
E
Miniature HTD® Timing Belts
5M Series 9 and 15mm Widths
5mm Pitch
NEOPRENE–NYLON COVERED, FIBERGLASS REINFORCED
AMBIENT TEMPERATURE RANGE— –18°C TO +85°C
BREAKING STRENGTH–6 mm WIDTH – 234 KGS
9 mm WIDTH – 390 KGS
3.56 MM.
.140 IN.
5 MM.
.197 IN.
2.08 MM.
.082 IN.
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
of
Grooves
64
66
70
75
80
85
90
95
100
107
113
120
123
127
133
134
142
148
151
160
166
167
170
178
185
186
190
200
210
225
254
284
319
358
360
374
379
389
400
505
E
Pitch Length
mm
Inch
320
330
350
375
400
425
450
475
500
535
565
600
615
635
665
670
710
740
755
800
830
835
850
890
925
930
950
1000
1050
1125
1270
1420
1595
1790
1800
1870
1895
1945
2000
2525
12.598
12.992
13.779
14.764
15.748
16.732
17.716
18.700
19.685
21.063
22.244
23.622
24.213
25.000
26.181
26.378
27.953
29.134
29.724
31.596
32.677
32.874
33.464
35.039
36.417
36.614
37.401
39.370
41.339
44.291
50.000
55.905
62.795
70.472
70.866
73.622
74.606
76.575
78.740
99.409
9mm Belt Width
Catalog
Item
Number
Code
–
–
5M066090
54367
5M070090
54368
5M075090
54369
5M080090
54370
5M085090
54371
5M090090
54372
5M095090
54373
5M100090
54374
5M107090
54376
5M113090
54377
5M120090
54378
5M123090
54379
5M127090
54380
5M133090
54381
5M134090
54382
5M142090
54383
5M148090
54384
5M151090
54385
5M160090
54386
5M166090
54387
5M167090
54388
5M170090
54389
5M178090
54390
5M185090
54390
5M186090
54392
5M190090
54393
5M200090
54394
5M210090
54395
5M225090
54396
5M254090
54397
5M284090
54398
5M319090
54399
5M358090
54400
5M360090
54401
5M374090
54402
5M379090
54403
5M389090
54404
5M400090
54405
5M505090
54406
15mm Belt Width
Catalog
Item
Number
Code
5M064150
54407
5M066150
54408
5M070150
54409
5M075150
54410
5M080150
54411
5M085150
54412
5M090150
54413
5M095150
54414
5M100150
54415
5M107150
54417
5M113150
54418
5M120150
54419
5M123150
54420
5M127150
54421
5M133150
54422
5M134150
54423
5M142150
54424
5M148150
54425
5M151150
54426
5M160150
54427
5M166150
54428
5M167150
54429
5M170150
54430
5M178150
54431
5M185150
54432
5M186150
54433
5M190150
54434
5M200150
54435
5M210150
54436
5M225150
54437
5M254150
54438
5M284150
54439
5M319150
54440
5M358150
54441
5M360150
54442
5M374150
54443
5M379150
54444
5M389150
54445
5M400150
54446
5M505150
54447
®Registered trademark of UNIROYAL, INC.
130
Boston Gear 800-825-6544
P-1930-BG
04/10
Timing Belt Pulleys
PA Series For 9mm Wide Belts
5mm Pitch; Aluminum
ALUMINUM ALLOY – CLEAR ANODIZED
COMPLETE WITH SETSCREWS
WITH FLANGE
WITHOUT FLANGE
L
L
D
FACE
O.D.
D
FACE
D/2
SETSCREW
D/2
O.D.
C
C
STANDARD TOLERANCES
Dimension
BORE
BORE
FLANGE
DIAMETER
Bore
All
12-16 Grooves
17-32 Grooves
O.D.
34-62 Grooves
72 Grooves
Tolerance
+.001 to –.000
+.002 to –.000
+.003 to –.000
+.004 to –.000
+.005 to –.000
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
of
Grooves
12
13
14
15
16
17
18
19
20
22
24
25
26
28
30
32
34
36
38
40
44
48
50
56
60
62
72
Pitch
O.D.
Dia.
.752
.815
.877
.940
1.003
1.065
1.128
1.191
1.253
1.379
1.504
1.566
1.629
1.754
1.880
2.005
2.130
2.256
2.381
2.506
2.757
3.008
3.133
3.509
3.760
3.885
4.511
B
Face
Width
C
.707
7/16
.770
1/2
.832
1/2
.895
9/16
.958
9/16
1.020
5/8
1.083
11/16
1.146
3/4
1.208 .250
13/16
1.334
15/16
1.459
1
1.521
1
1.584
1-1/16
1.709
35/64 1-3/16
1.835
1-3/16
1.960
1-1/4
2.085
1-3/8
2.211
2.336 .3125
2.461
2.712
2.963
1-1/2
3.088
3.464 .375
3.715
3,840
4.466
With Flanges
Flange
Item
Setscrew* Catalog
Dia.
Number
Code
7/8
PA5012DF090 54677
15/16
PA5013DF090 54678
1
PA5014DF090 54679
1-1/16
PA5015DF090 54680
1/4 51/64 1-3/32
PA5016DF090 54681
1-3/16
PA5017DF090 54682
1-1/4
PA5018DF090 54683
1-5/16
PA5019DF090 54684
1-3/8
PA5020DF090 54685
1-1/2
PA5022DF090 54686
1-5/8
#8–32
PA5024DF090 54687
1-11/16
PA5025DF090 54688
1-3/4
PA5026DF090 54689
5/16 55/64 1-7/8
PA5028DF090 54690
2
PA5030DF090 54691
2-1/8
PA5032DF090 54692
2-1/4
PA5034DF090 54693
–
–
–
–
–
–
–
–
–
–
–
–
25/64 15/16
–
–
–
–
–
–
–
#10–32
–
–
–
–
–
–
–
–
–
–
–
D
L
Without Flanges
Catalog
Item
Number
Code
PA5012NF090 56494
PA5013NF090 56495
PA5014NF090 56496
PA5015NF090 56497
PA5016NF090 56498
PA5017NF090 56499
PA5018NF090 54700
PA5019NF090 54701
PA5020NF090 54702
PA5022NF090 54703
PA5024NF090 54704
PA5025NF090 54705
PA5026NF090 54706
PA5028NF090 54707
PA5030NF090 54708
PA5032NF090 54709
PA5034NF090 54710
PA5036NF090 54711
PA5038NF090 54712
PA5040NF090 54713
PA5044NF090 54714
PA5048NF090 54715
PA5050NF090 54716
PA5056NF090 54717
PA5060NF090 54718
PA5062NF090 54719
PA5072NF090 54720
*Pulleys with 12 and13 grooves have one setscrew. All others have two at 90°
P-1930-BG
04/10
Boston Gear 800-825-6544
131
E
Timing Belt Pulleys
PA Series For 15mm Wide Belts
5mm Pitch; Aluminum
ALUMINUM ALLOY – CLEAR ANODIZED†
COMPLETE WITH SETSCREWS
WITH FLANGE
WITHOUT FLANGE
L
L
FACE
FACE
D
STANDARD TOLERANCES
Dimension
Bore
All
12-16 Grooves
17-32 Grooves
O.D.
34-62 Grooves
72 Grooves
O.D.
C
Tolerance
+.001 to –.000
+.002 to –.000
+.003 to –.000
+.004 to –.000
+.005 to –.000
D
D/2
D/2
SETSCREW
O.D.
C
BORE
FLANGE
DIAMETER
BORE
ORDER BY CATALOG NUMBER OR ITEM CODE
E
Number
of
Grooves
12
13
14
15
16
17
18
19
20
22
24
25
26
28
30
32
34
36
38
40
44
48
50
56
60
62
72
With Flanges
Flange
Item
Setscrew* Catalog
Dia.
Number
Code
.752 .707
7/16
7/8
PA5012DF150 54721
.815 .770
1/2
15/16
PA5013DF150 54722
.877 .832
1/2
1
PA5014DF150 54723
.940 .895
9/16
1-1/16
PA5015DF150 54724
1.003 .958
9/16 1/4 1-1/32 1-3/32
PA5016DF150 54725
1.065 1.020
5/8
1-3/16
PA5017DF150 54726
1.128 1.083
11/16
1-1/4
PA5018DF150 54727
1.191 1.146
3/4
1-5/16
PA5019DF150 54728
1.253 1.208 .250
13/16
1-3/8
PA5020DF150 54729
1.379 1.334
15/16
1-1/2
PA5022DF150 54730
1.504 1.459
1
1-5/8
#8–32
PA5024DF150 54731
1.566 1.521
1
1-11/16
PA5025DF150 54732
1.629 1.584
1-1/16
1-3/4
PA5026DF150 54733
1.754 1.709
25/32 1-3/16 5/16 1-3/32 1-7/8
PA5028DF150 54734
1.880 1.835
1-3/16
2
PA5030DF150 54735
2.005 1.960
1-1/4
2-1/8
PA5032DF150 54736
2.130 2.085
1-3/8
2-1/4
PA5034DF150 54737
2.256 2.211
–
–
–
2.381 2.336 .3125
–
–
–
2.506 2.461
–
–
–
2.757 2.712
–
–
–
3.008 2.963
1-1/2 13/32 1-3/16 –
–
–
3.133 3.088
–
–
–
3.509 3.464 .375
–
#10–32
–
–
3.760 3.715
–
–
–
3.885 3,840
–
–
–
4.511 4.466
–
–
–
Pitch
O.D.
Dia.
B
Face
Width
C
D
L
Without Flanges
Catalog
Item
Number
Code
PA5012NF150 54738
PA5013NF150 54739
PA5014NF150 54740
PA5015NF150 54741
PA5016NF150 54742
PA5017NF150 54743
PA5018NF150 54744
PA5019NF150 54745
PA5020NF150 54746
PA5022NF150 54747
PA5024NF150 54748
PA5025NF150 54749
PA5026NF150 54750
PA5028NF150 54751
PA5030NF150 54752
PA5032NF150 54753
PA5034NF150 54754
PA5036NF150 54755
PA5038NF150 54756
PA5040NF150 54757
PA5044NF150 54758
PA5048NF150 54759
PA5050NF150 54760
PA5056NF150 54761
PA5060NF150 54762
PA5062NF150 54763
PA5072NF150 54764
*Pulleys with 12 and13 grooves have one setscrew. All others have two at 90°
†44-72 grooves, material is A356-T6 (cast).
132
Boston Gear 800-825-6544
P-1930-BG
04/10
Timing Belt Pulleys
PL Series For 9mm Wide Belts
5mm Pitch; Lexan
LEXAN – FIBERGLASS REINFORCED
DOUBLE FLANGE
SINGLE FLANGE
L
L
FACE
3/16
O.D.
D
D
F.D.
B
O.D.
C
F.D.
B
C
STANDARD TOLERANCES
Dimension
Bore
3/16
All
Tolerances
+.001 to –.000
FACE
ORDER BY CATALOG NUMBER OR ITEM CODE
Number
of
Grooves
11
12
13
14
15
16
17
18
19
20
22
25
28
29
30
40
50
Pitch
Dia.
O.D.
.689
.752
.815
.877
.940
1.003
1.065
1.128
1.191
1.253
1.379
1.566
1.754
1.817
1.880
2.506
3.133
.644
.707
3/16
.770
.832
.895
.958
1.020
1.083 1/4
1.146
1.208
1.334
1.521
1.709
1.772
1.835
2.461
3.088 5/16
B
Face
Width
C
11/16
D
L
3/4*
7/16
13/16
3/4
1/4
7/8
5/16
13/16*
Single Flange
Flange
Catalog
Item
Dia.
Number
Code
.87
PL5011SF090
54765
.93
PL5012SF090
54766
.99
PL5013SF090
54767
1.06
PL5014SF090
54768
1.19
PL5015SF090
54769
1.19
PL5016SF090
54770
1.24
PL5017SF090
54771
1.31
PL5018SF090
54772
1.38
PL5019SF090
54773
1.44
PL5020SF090
54774
1.57
PL5022SF090
54775
1.76
PL5025SF090
54776
1.95
PL5028SF090
54777
2.02
PL5029SF090
54778
2.08
PL5030SF090
54779
2.71
PL5040SF090
54780
3.29
PL5050SF090
54781
Double Flange
Catalog
Item
Number
Code
PL5011DF090 54782
PL5012DF090 54783
PL5013DF090 54784
PL5014DF090 54785
PL5015DF090 54786
PL5016DF090 54787
PL5017DF090 54788
PL5018DF090 54789
PL5019DF090 54790
PL5020DF090 54791
PL5022DF090 54792
PL5025DF090 54793
PL5028DF090 54794
PL5029DF090 54795
PL5030DF090 54796
PL5040DF090 54797
PL5050DF090 54798
*7/8” for Double Flange.
E
P-1930-BG
04/10
Boston Gear 800-825-6544
133
Timing Belt Pulleys
PLB Series For 9mm Wide Belts
5mm Pitch; Lexan
LEXAN – FIBERGLASS REINFORCED
KNURLED ALUMINUM INSERTS
COMPLETE WITH SETSCREWS
L
5
32
O.D.
STANDARD TOLERANCES
Dimension
Tolerance
Bore
All
SETSCREW
L
D
5
32
SETSCREW
D
A C F.D.
O.D.
B
A C
F.D.
B
3
16
+.001 to –.000
FACE
SPOT DRILL
3
16
FACE
SPOT DRILL
ORDER BY CATALOG NUMBER OR ITEM CODE
Number Pitch
O.D.
of
Dia.
Grooves
E
11
.689
.644
12
.752
.707
13
.815
.770
14
.877
.832
15
.940
.895
16
1.003 .958
17
1.065 1.020
18
1.128 1.083
19
1.191 1.146
20
1.253 1.208
22
1.379 1.334
25
1.566 1.521
28
1.754 1.709
29
1.817 1.772
30
1.880 1.835
40
2.506 2.461
50
3.133 3.088
B
3/16
1/4
3/16
1/4
3/16
1/4
3/16
1/4
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
5/16
3/8
1/2
5/16
3/8
1/2
Face
Width
7/16
Single Flange
Flange SetItem
Dia. screw* Catalog
Number
Code
PLB5011SF09-3/16 54799
.87
PLB5011SF09-1/4 54800
PLB5012SF09-3/16 54801
.93
11/16
3/8
#6–32 PLB5012SF09-1/4 54802
PLB5013SF09-3/16 54803
.99
PLB5013SF09-1/4 54804
PLB5014SF09-3/16 54805
1.06
PLB5014SF09-1/4 54806
PLB5015SF09-1/4 54807
1.19
PLB5015SF09-5/16 54808
PLB5015SF09-3/8 54809
PLB5016SF09-1/4 54810
1.19
PLB5016SF09-5/16 54811
PLB5016SF09-3/8 54812
PLB5017SF09-1/4 54813
1.24
PLB5017SF09-5/16 54814
3/4
PLB5017SF09-3/8 54815
PLB5018SF09-1/4 54816
1.31
PLB5018SF09-5/16 54817
PLB5018SF09-3/8 54818
PLB5019SF09-1/4 54819
1/4
13/16 1.38
PLB5019SF09-5/16 54820
PLB5019SF09-3/8 54821
PLB5020SF09-1/4 54822
1/2
1.44 #8-32 PLB5020SF09-5/16 54823
PLB5020SF09-3/8 54824
PLB5022SF09-1/4 54825
1.57
PLB5022SF09-5/16 54826
PLB5022SF09-3/8 54827
PLB5025SF09-1/4 54828
1.76
PLB5025SF09-5/16 54829
PLB5025SF09-3/8 54830
PLB5028SF09-1/4 54831
1.95
PLB5028SF09-5/16 54832
PLB5028SF09-3/8 54833
PLB5029SF09-1/4 54834
7/8
2.02
PLB5029SF09-5/17 54835
PLB5029SF09-3/8 54836
PLB5030SF09-1/4 54837
2.08
PLB5030SF09-5/16 54838
PLB5030SF09-3/8 54839
PLB5040SF09-5/16 54840
2.71
PLB5040SF09-3/8 54841
5/16 5/8 13/16*
#10–32 PLB5040SF09-1/2 54842
PLB5050SF09-5/16 54843
PLB5050SF09-3/8 54844
3.29
PLB5050SF09-1/2 54845
C
D Insert
Dia.
L
Double Flanges
Catalog
Item
Number
Code
PLB5011DF09-3/16 54846
PLB5011DF09-1/4
54847
PLB5012DF09-3/16 54848
PLB5012DF09-1/4
54849
PLB5013DF09-3/16 54850
PLB5013DF09-1/4
54851
PLB5014DF09-3/16 54852
PLB5014DF09-1/4
54853
PLB5015DF09-1/4
54854
PLB5015DF09-5/16 54855
PLB5015DF09-3/8
54856
PLB5016DF09-1/4
54857
PLB5016DF09-5/16 54858
PLB5016DF09-3/8
54859
PLB5017DF09-1/4
54860
PLB5017DF09-5/16 54861
PLB5017DF09-3/8
54862
PLB5018DF09-1/4
54863
PLB5018DF09-5/16 54864
PLB5018DF09-3/8
54865
PLB5019DF09-1/4
54866
PLB5019DF09-5/16 54867
PLB5019DF09-3/8
54868
PLB5020DF09-1/4
54869
PLB5020DF09-5/16 54870
PLB5020DF09-3/8
54871
PLB5022DF09-1/4
54872
PLB5022DF09-5/16 54873
PLB5022DF09-3/8
54874
PLB5025DF09-1/4
54875
PLB5025DF09-5/16 54876
PLB5025DF09-3/8
54877
PLB5028DF09-1/4
54878
PLB5028DF09-5/16 54879
PLB5028DF09-3/8
54880
PLB5029DF09-1/4
54881
PLB5029DF09-5/16 54882
PLB5029DF09-3/8
54883
PLB5030DF09-1/4
54884
PLB5030DF09-5/16 54885
PLB5030DF09-5/16 54886
PLB5040DF09-5/16 54887
PLB5040DF09-3/8
54888
PLB5040DF09-1/2
54889
PLB5050DF09-5/16 54890
PLB5050DF09-3/8
54891
PLB5050DF09-1/2
54892
†7/8” for Double Flange
*No Flange
134
Boston Gear 800-825-6544
P-1930-BG
04/10
Bearings
Section Contents
F
BOST-BRONZ (OIL-IMPREGNATED SINTERED BRONZE)
General Description .............................................................................................................136–137
Catalog Number Selections/Dimensions...........................................................................138–144
BEAR-N-BRONZ (660 CAST BRONZE)
General Description .....................................................................................................................145
Catalog Number Selections/Dimensions...........................................................................146–153
BRONZE BEARING EMERGENCY BANK
BOST-BRONZ & BEAR-N-BRONZ ..............................................................................................154
BOStonE F-1 (GLASS FILLED TEFLON)
General Description/Engineering ...............................................................................................155
Catalog Number Selections/Dimensions...........................................................................156–157
RULON® 641 BEARINGS
General Description .....................................................................................................................158
Catalog Number Selections/Dimensions...................................................................................159
BOStonE MOLDED PLASTIC
General Description/Engineering ...............................................................................................160
Catalog Number Selections/Dimensions...........................................................................161–171
BOStonE MOLDED NYLON
Catalog Number Selections/Dimensions...........................................................................172–173
Engineering Information ......................................................................................................174–182
ANTI-FRICTION (BALL BEARINGS)
General Description .............................................................................................................183–184
Catalog Number Selections/Dimensions...........................................................................185–197
SELF-ALIGNING (ROD END & SPHERICAL BEARINGS)
Catalog Number Selections/Dimensions...........................................................................198–206
Engineering...........................................................................................................................207–211
MOUNTED BEARINGS
General Description .....................................................................................................................212
Replacement Bearings & Locking Collars .........................................................................213–214
Pillow Blocks .......................................................................................................................215–222
Flanged Units........................................................................................................................223–230
Shaft Supports .............................................................................................................................231
Take-Up Frames...........................................................................................................................232
ENGINEERING INFORMATION ....................................................................................................233–239
P-1930-BG
04/10
Boston Gear 800-825-6544
135
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
F
BOST-BRONZ is Boston Gear’s all-purpose, oil-impregnated
porous bronze bearing material. It is manufactured of highest
purity metal powders by the powder metallurgy process. This
process provides uniformly distributed pores between the
metal particles which absorb oil by capillary action. BOSTBRONZ has a self-contained oil supply (approximately 20%
by volume) which provides a uniform, protective film over the
entire bearing surface. Composition and physical properties
are as follows: –
BOST-BRONZ can be used for production and replacement
requirements in practically every known industry. It has
proven to be efficient under heavy loads at moderate speeds
and also under light loads at high speeds. It is ideally suited
for applications where normal lubrication is difficult or
impossible to provide.
Coeifficent of Friction
Static
.1 - .3
Dynamic
Composition
%
.02 - .04
The close tolerances of BOST-BRONZ bearings are made
possible through expertly controlled manufacturing methods.
In addition, the lubricating features of BOST-BRONZ permit
reduced shaft clearances — a precision product with
precision performance.
Performance
Because of its porous construction, BOST-BRONZ bearings
have an oil reservoir when idle — an oil film to start on — an
oil film to run on, assuring low starting torque and smooth,
quiet positive performance.
Adaptability
BOST-BRONZ bearings are designed for immediate
installation and may be used in most applications without
additional machining. Oil holes or grooves are not required
and turning or boring bearing diameters is normally
unnecessary.
Density in Grams
per Cu. Cent.
Impregnated
Tensile
Strength
Lbs. per Sq. In.
Yield Strength
in Compression
(0.2% Offset)
Lbs. per Sq. In.
Elongation in
One Inch %
Porosity by
Volume %
6.4/6.8
14,000
11,000
1.0
19 Min.
Copper (Cu)
87.5-90.5
Iron
1.0 Max.
Lead (a)
Carbon
(Graphite Max.) 1.75 Max.
Tin
9.5-10.5
Total Other
Elements
.05
(a) Included in other elements
136
Accuracy
Boston Gear 800-825-6544
Conforms to ASTM B438-73 Grade 1, Type 2, and SAE-841
Mil-B-5687C TYPE 1 comp A
(Ref:Oil is a SAE 20-30 weight)
P-1930-BG
04/10
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Non-Listed Sizes
Applications
The stock sizes of BOST-BRONZ bearings listed in this
catalog will satisfy the majority of industrial applications.
Tooling is available for many metric and additional inch sizes.
Where tooling is not available, special sizes can be made to
order.
BOST-BRONZ bearings can be used on any application where
the load-carrying capacity required falls within the capabilities
of the material. BOST-BRONZ bearings operate efficiently
under heavy loads at slow speeds. Because these bearings
are supplied with oil impregnation, the original oil content
provides long-lasting lubrication. For even longer life
requirements, many applications incorporate impregnated
felts or other reservoir techniques about the bearing.
Special Shapes
Many special shapes can be made economically by the
powdered metal process. This process is particularly
economical for the production of comparatively simple shapes
in large volume. More complicated shapes may also be
economical to produce by this process when the savings in
machining justify the cost of more expensive tooling.
Selection
In general, sleeve bearings should be selected with a length of
one to two times the shaft diameter and an O.D.
approximately 25% larger than the shaft diameter.
A general guide to determination of limiting load and velocity
values for sleeve bearings has been established by the use of
PV calculations. PV represents Pressure x Velocity, for
example 100 psi x 20 fpm yields a PV of 2000.
Maximum PV values for BOST-BRONZ bearings:
Cylindrical & Flange Bearings - 50,000
Thrust Bearings - 10,000
For complete selection and application information, see
Engineering Section, Pages 174-182.
Special Compositions
In addition to our standard BOST-BRONZ, many special
compositions can be furnished on a made-to-order basis.
P-1930-BG
04/10
Boston Gear 800-825-6544
137
F
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Catalog
Item
Catalog
A
B
C
Number
Code
Number
1/8
B24-1
34504
3/8
B69-3
1/4
1/4
B24-2
34506
1/2
B69-4
.252
3/8
B24-3
34508
5/8
B69-5
9/16
1/8
1/2
B24-4
34510
3/4
B69-6
.5645
7/8
B69-7
.127
1/8
B25-1
34512
1
B69-8
1/4
B25-2
34514
5/16
1-14 B69-10
3/8
B25-3
34516
.315
1/2
B25-4
34518
3/8
B610-3
5/8
B25-5
34520
1/2
B610-4
3/8
5/8
B610-5
1/4
B34-2
34522
5/8
3/8
B34-3
34524
.377
3/4
B610-6
1/4
.627
1/2
B34-4
34526
7/8
B610-7
.252
5/8
B34-5
34528
1
B610-8
3/4
B34-6
34530
1-1/4 B610-10
1/4
B35-2
34532
3/8
B612-3
3/16
3/8
B35-3
34534
1/2
B612-4
5/16
3/4
.189
1/2
B35-4
34536
3/4
B612-6
.314
.753
5/8
B35-5
34538
1
B612-8
3/4
B35-6
34540
1-1/4 B612-10
3/8
B36-3
13561
3/8
B79-3
3/8
1/2
B36-4
13563
1/2
B79-4
.377
5/8
B36-5
13565
5/8
B79-5
9/16
3/4
B36-6
13567
3/4
B79-6
.5645
1/4
B45-2
13569
7/8
B79-7
5/16
3/8
B45-3
13571
1
B79-8
.315
1/2
B45-4
13573
1-1/4 B79-10
3/4
B45-6
13575
7/16
3/8
B710-3
1/4
B46-2
34542
.439
1/2
B710-4
1
5/16 B46-2 /2 34544
5/8
B710-5
5/8
3/8
B46-3
34546
3/4
B710-6
.628
1/2
B46-4
34548
7/8
B710-7
3/8
5/8
B46-5
34550
1
B710-8
.377
3/4
B46-6
34552
1-1/4 B710-10
7/8
B46-7
34554
1/2
B711-4
1
B46-8
34556
11/16
1
B711-8
1/4
1-1/4 B46-10
34558
.690
1-1/2
B711-12
.252
3/8
B47-3
34560
1/2
B810-4
1/2
B47-4
34562
5/8
B810-5
7/16
5/8
B47-5
34564
3/4
B810-6
.439
3/4
B47-6
34566
5/8
7/8
B810-7
7/8
B47-7
34568
.628
1
B810-8
1
B47-8
34570
1-1/8 B810-9
3/8
B48-3
34572
1-1/4 B810-10
1/2
B48-4
34574
1-1/2 B810-12
5/8
B48-5
34576
1/2
1/2
B811-4
3/4
B48-6
34578
.502
7/8
B48-7
34580
5/8
B811-5
1
B48-8
34582
3/4
B811-6
1-1/4 B48-10
34584
11/16
7/8
B811-7
.690
1
B811-8
3/8
B56-3
34586
1-1/8 B811-9
1/2
B56-4
34588
1-1/4 B811-10
3/8
5/8
B56-5
34590
1-1/2 B811-12
.377
3/4
B56-6
34592
7/8
B56-7
34594
1/2
B812-4
1
B56-8
34596
5/8
B812-5
3/4
B812-6
1/4
B57-2
34598
3/8
B57-3
34600
7/8
B812-7
1/2
B57-4
34602
1/2
3/4
1
B812-8
5/16
5/8
B57-5
34604
.503
.753
1-1/8 B812-9
7/16
.314
3/4
B57-6
34606
1-1/4 B812-10
.439
7/8
B57-7
34608
1-1/2 B812-12
1
B57-8
34610
1-3/4 B812-14
1-1/4 B57-10
34612
2
B812-16
1-3/8 B57-11
34614
1/2
B813-4
3/8
B58-3
34616
13/16
3/4
B813-6
1/2
B58-4
34618
.815
1
B813-8
5/8
B58-5
34620
1-1/2 B813-12
3/4
B58-6
34622
1/2
1/2
B814-4
7/8
B58-7
34624
.502
5/8
B814-5
1
B58-8
34626
3/4
B814-6
1-1/4 B58-10
34628
7/8
7/8
B814-7
1-1/2 B58-12
34630
.878
1
B814-8
1-3/4 B58-14
34632
1-1/4
B814-10
1/2
B67-4
13577
1-1/2 B814-12
7/16
5/8
B67-5
13579
3/4
B816-6
.440
3/4
B67-6
13581
1
1
B816-8
1
B67-8
13583
1.004
1-1/2
B816-12
3/8
B68-3
34634
3/8
2
B816-16
1/2
B68-4
34636
.377
1/2
B911-4
5/8
B68-5
34638
1/2
9/16
11/16
3/4
B911-6
3/4
B68-6
34640
.502
.565
.690
1
B911-8
7/8
B68-7
34642
1-1/2 B911-12
1
B68-8
34644
1-1/4 B68-10
34646
On A and B dimensions, tolerances apply to actual (decimal) dimensions.
A
F
B
A
C
STANDARD TOLERANCES
Dimensions
1/8 – 1 1/2
A
1 3/4 – 2 1/2
B 2 3/4 - 3 1/2
1/8 – 1-1/2
C
1 3/4 – 3
4
Tolerance
+.000, – .001
+.000, – .0015
+.000,– .002
± .005
± .0075
± .010
CONCENTRICITY
Dimensions
1/8 – 1 1/2
A
1 5/8 – 3
3 1/4 – 3 1/2
Tolerance
.003
.004
.005
Prices on unlisted sizes and other Boston
Gear powder metal parts provided on request.
138
Boston Gear 800-825-6544
B
C
P-1930-BG
Item
Code
34648
34650
34652
34654
34656
34658
34660
34676
34678
34680
34682
34684
34686
34688
34690
34692
34694
34696
34698
34662
34664
34666
34668
34670
34672
34674
34700
34702
34704
34706
34708
34710
34712
34714
34716
34718
34720
34722
34724
34726
34728
34730
34732
34734
34736
34738
34740
34742
34744
34746
34748
34750
34752
34754
34756
34758
34760
34762
34764
34766
34768
34770
34772
34774
34776
34778
34780
34782
34784
34786
34788
34790
34792
13585
13587
13589
13591
34794
34796
34798
34800
04/10
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
3/4
.753
9/16
.565
13/16
.815
3/4
.753
5/8
.627
13/16
.815
7/8
.878
5/8
.628
11/16
.690
1
1.003
7/8
.878
7/8
.878
15/16
.9405
3/4
.753
1
1.003
C
1/2
3/4
1
1-1/2
1/2
3/4
1
1-1/4
1-1/2
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-1/2
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
2
5/8
3/4
7/8
1
1-1/4
1-1/2
1-3/4
2
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
1-3/4
2
3/4
1
1-1/4
1-1/2
1-3/4
2
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
1-5/8
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
1-3/4
2
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-1/2
1-3/4
2
2-1/2
Catalog
Number
B912-4
B912-6
B912-8
B912-12
B913-4
B913-6
B913-8
B913-10
B913-12
B1012-4
B1012-5
B1012-6
B1012-7
B1012-8
B1012-9
B1012-10
B1012-12
B1013-4
B1013-5
B1013-6
B1013-7
B1013-8
B1013-10
B1013-12
B1013-16
B1014-5
B1014-6
B1014-7
B1014-8
B1014-10
B1014-12
B1014-14
B1014-16
B1016-4
B1016-5
B1016-6
B1016-7
B1016-8
B1016-10
B1016-12
B1016-14
B1016-16
B1114-6
B1114-8
B1114-10
B1114-12
B1114-14
B1114-16
B1214-4
B1214-5
B1214-6
B1214-7
B1214-8
B1214-10
B1214-12
B1214-13
B1215-4
B1215-5
B1215-6
B1215-7
B1215-8
B1215-10
B1215-12
B1215-14
B1215-16
B1216-4
B1216-5
B1216-6
B1216-7
B1216-8
B1216-9
B1216-10
B1216-12
B1216-14
B1216-16
B1216-20
Item
Code
34802
34804
34806
34808
34810
34812
34814
34816
34818
34820
34822
34824
34826
34828
34830
34834
34832
34836
34838
34840
35400
34842
34844
34846
34848
34850
34852
34854
34856
34858
34860
34862
34864
34866
34868
34870
34872
34874
34876
34878
34880
34882
34884
34886
34888
34890
34892
34894
34896
34898
34900
34902
34904
34906
34908
34910
34912
34914
34916
34918
34920
34922
34924
34926
34928
34930
34932
34934
34936
34938
34940
34942
34944
34946
34948
34950
A
B
1-1/8
1.128
3/4
.753
1-1/4
1.253
13/16
.8155
1
1.003
1
1.003
7/8
.878
1-1/8
1.128
1-1/4
1.253
1-3/16
1.1905
15/16
.9405
1-1/4
1.253
1-1/8
1.128
1-3/16
1.190
1
1.004
1-1/4
1.253
1-5/16
1.3155
C
1/2
3/4
1
1-1/4
1-1/2
1-3/4
2
3/4
1
1-1/4
1-1/2
1-3/4
2
3/4
1
1-1/4
1-1/2
1-3/4
2
3/4
7/8
1
1-1/4
1-1/2
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/2
3/4
1
1-1/4
1-1/2
2
3/4
1
1-1/4
1-1/2
2
3/4
1
1-1/4
1-1/2
1-3/4
2
3/4
1
1-1/4
1-1/2
1-3/4
2
3/4
1
1-1/4
1-1/2
1-3/4
2
3/4
7/8
1
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/4
2-1/2
3
1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
Catalog
Number
B1218-4
B1218-6
B1218-8
B1218-10
B1218-12
B1218-14
B1218-16
B1220-6
B1220-8
B1220-10
B1220-12
B1220-14
B1220-16
B1316-6
B1316-8
B1316-10
B1316-12
B1316-14
B1316-16
B1416-6
B1416-7
B1416-8
B1416-10
B1416-12
B1418-6
B1418-7
B1418-8
B1418-9
B1418-10
B1418-11
B1418-12
B1418-14
B1418-16
B1418-20
B1420-6
B1420-8
B1420-10
B1420-12
B1420-16
B1519-6
B1519-8
B1519-10
B1519-12
B1519-16
B1520-6
B1520-8
B1520-10
B1520-12
B1520-14
B1520-16
B1618-6
B1618-8
B1618-10
B1618-12
B1618-14
B1618-16
B1619-6
B1619-8
B1619-10
B1619-12
B1619-14
B1619-16
B1620-6
B1620-7
B1620-8
B1620-10
B1620-11
B1620-12
B1620-14
B1620-16
B1620-18
B1620-20
B1620-24
B1621-8
B1621-10
B1621-12
B1621-14
B1621-16
B1621-20
B1621-24
Item
Code
34952
34954
34956
34958
34960
34962
34964
34966
34968
34970
34972
34974
34976
34978
34980
34982
34984
34986
34988
34990
34992
34994
34996
34998
35000
35002
35004
35006
35008
35010
35012
35014
35016
35018
35020
35022
35024
35026
35028
35030
35032
35034
35036
35038
35040
35042
35044
35046
35048
35050
35052
35054
35056
35058
35060
35062
13593
13595
13597
13599
13601
13603
35064
35066
35068
35070
35072
35074
35076
35078
35080
35082
35084
35086
35088
35090
35092
35094
35096
35098
F
B
A
C
STANDARD TOLERANCES
Dimensions
A 1/8 – 1 1/2
1 3/4 – 2 1/2
B 2 3/4 – 3 1/2
1/8 – 1 1/2
C
1 3/4 – 3
4
Tolerance
+.000, – .001
+.000, – .0015
+.000, – .002
± .005
± .0075
± .010
CONCENTRICITY
Dimensions
1/8 – 1 1/2
1 5/8 – 3
3 1/4 – 3 1/2
A
Tolerance
.003
.004
.005
Prices on unlisted sizes and other Boston Gear
powder metal parts provided on request.
On A and B dimensions, tolerances apply to actual (decimal) dimensions.
P-1930-BG
04/10
Boston Gear 800-825-6544
139
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
1-3/8
1.378
F
1
1.003
1-1/2
1.503
1-1/16 1-5/16
1.0655 1.3155
1-1/4
1.254
1-5/16
1.3155
B
1-1/8
1.129
A
1-3/8
1.378
1-1/2
1.503
C
1-7/16
1.441
STANDARD TOLERANCES
Dimensions
A 1/8 – 1 1/2
1 3/4 – 2 1/2
B 2 3/4 – 3 1/2
1/8 – 11/2
C
1 3/4 – 3
4
Tolerance
+.000, – .001
+.000, – .0015
+.000, – .002
± .005
± .0075
± .010
1-3/16
1.1905
1-1/2
1.503
1-1/2
1.503
1-1/4
1.254
CONCENTRICITY
Dimensions
A 1/-8 – 1 1/2
1 5/8 – 3
3 1/4 – 3 1/2
1-5/8
1.628
Tolerance
.003
.004
.005
Prices on unlisted sizes and other Boston Gear
powder metal parts provided on request.
1-5/16
1.3155
1-5/8
1.628
1-5/8
1.628
1-3/8
1.378
1-3/4
1.753
C
1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
1
1-1/4
1-1/2
2
2-1/2
3
1
1-1/2
2
2-1/2
1
1-1/4
1-1/2
1
1-1/4
1-1/2
2
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
1
1-1/2
2
1-1/4
2
2-1/2
3
1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
2
2-1/4
2-1/2
3
1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
1-1/4
1-1/2
2
2-1/2
3
1
1-1/2
2
2-1/2
3
1
1-1/2
2
2-1/2
3
Catalog
Number
B1622-8
B1622-10
B1622-12
B1622-14
B1622-16
B1622-20
B1622-24
B1624-8
B1624-10
B1624-12
B1624-16
B1624-20
B1624-24
B1721-8
B1721-12
B1721-16
B1721-20
B1820-8
B1820-10
B1820-12
B1821-8
B1821-10
B1821-12
B1821-16
B1822-6
B1822-8
B1822-10
B1822-12
B1822-14
B1822-16
B1822-20
B1822-24
B1824-8
B1824-12
B1824-16
B1923-10
B1923-16
B1923-20
B1923-24
B1924-8
B1924-10
B1924-12
B1924-14
B1924-16
B1924-20
B1924-24
B2024-8
B2024-9
B2024-10
B2024-11
B2024-12
B2024-13
B2024-14
B2024-16
B2024-18
B2024-20
B2024-24
B2026-8
B2026-10
B2026-12
B2026-14
B2026-16
B2026-20
B2026-24
B2126-10
B2126-12
B2126-16
B2126-20
B2126-24
B2226-8
B2226-12
B2226-16
B2226-20
B2226-24
B2228-8
B2228-12
B2228-16
B2228-20
B2228-24
Item
Code
35100
35102
35104
35106
35108
35110
35112
35114
35116
35118
35120
35122
35124
35126
35128
35130
35132
13605
13639
13641
35134
35136
35138
35140
35142
35144
35146
35148
35150
35152
35154
35156
35158
35160
35162
35164
35166
35168
35170
35172
35174
35716
35178
35180
35182
35184
35186
35188
35190
35192
35194
35196
35198
35200
35202
35204
35206
35208
35210
35212
35214
35216
35218
35220
35222
35224
35226
35228
35230
35232
35234
35236
35238
35240
35242
35244
35246
35248
35250
A
1-7/16
1.4405
B
1-3/4
1.753
1-3/4
1.753
1-13/16
1.816
1-1/2
1.503
1-7/8
1.878
2
2.004
1-7/8
1.878
1-5/8
1.628
2
2.004
1-11/16 2-3/16
1.6905 2.191
1-3/4
1.753
2
2.004
2-1/8
2.129
1-15/16 2-5/16
1.9405 2.316
2
2.003
2-3/8
2.379
2-1/2
2.504
2-1/4
2.254
2-3/4
2.754
2-3/8
2.379
2-3/4
2.754
2-1/2
2.504
3
3.005
2-3/4
2.755
3-1/4
3.255
3
3.004
3-1/2
3.505
C
1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
1
1-1/4
1-1/2
2
2-1/2
3
1-1/2
3
1-1/2
2
2-1/2
3
1
1-1/2
2
2-1/2
3
1-1/4
1-1/2
2
2-1/2
3
1
2
3
1-3/4
2
3
4
2
2-1/2
3
1-1/2
2
3
2
3
4
1-3/4
2
2-3/4
3
4
1
2
3
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
Catalog
Number
B2328-8
B2328-10
B2328-12
B2328-14
B2328-16
B2328-20
B2328-24
B2428-8
B2428-10
B2428-12
B2428-16
B2428-20
B2428-24
B2429-12
B2429-24
B2430-12
B2430-16
B2430-20
B2430-24
B2432-8
B2432-12
B2432-16
B2432-20
B2432-24
B2630-10
B2630-12
B2630-16
B2630-20
B2630-24
B2632-8
B2632-16
B2632-24
B2735-14
B2735-16
B2735-24
B2735-32
B2832-16
B2832-20
B2832-24
B2834-12
B2834-16
B2834-24
B3137-16
B3137-24
B3137-32
B3238-14
B3238-16
B3238-22
B3238-24
B3238-32
B3240-8
B3240-16
B3240-24
B3644-16
B3644-24
B3644-32
B3844-16
B3844-24
B3844-32
B4048-16
B4048-24
B4048-32
B4452-16
B4452-24
B4452-32
B4856-16
B4856-24
B4856-32
Item
Code
35252
35254
35256
35258
35260
35262
35264
35266
35268
35270
35272
35274
35276
35278
35280
35282
35284
35286
35288
35290
35292
35294
35296
35298
35300
35302
35304
35306
35308
35310
35312
35314
35316
35318
35320
35322
35324
35326
35328
35330
35332
35334
35336
35338
35340
35342
35344
35346
35348
35350
35352
35354
35356
35364
35366
35368
35370
35372
35374
35382
35384
35386
35388
35390
35392
35394
35396
35398
On A and B dimensions, tolerances apply to actual (decimal) dimensions.
140
Boston Gear 800-825-6544
P-1930-BG
04/10
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Flanged Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
D
E
1/8
.127
5/16
.315
.375
3/64
3/16
.189
5/16
.3145
.375
3/64
1/4
.252
3/8
.377
1/4
3/8
1/8
1/4
3/8
1/4
3/8
1/2
5/8
3/4
.500
3/64
3/8
.500
3/64
3/8
.377
5/16
.314
7/16
.439
1/2
.502
1/2
.502
3/8
.377
9/16
.5645
5/8
.627
3/4
.753
9/16
.565
7/16
.439
5/8
.628
5/8
.628
1/2
.502
11/16
.690
3/4
.753
9/16
.565
3/4
.753
3/8
1/2
5/8
3/4
7/8
1
3/8
1/2
5/8
3/8
13/32
1/2
5/8
3/4
7/8
1
1-1/4
1/2
3/4
1-1/4
3/8
1/2
5/8
3/4
1
1-1/4
1/2
1/2
5/8
3/4
5/8
3/4
1-1/4
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
1-3/4
1/2
5/8
3/4
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
1/2
3/4
1
.625
.688
.688
3/32
3/32
3/32
.750
1/8
.875
1/8
1.000
1/8
.688
1/16
.875
1/8
.875
1/8
.938
1/8
1.000
1/8
1.000
1/8
Catalog
Number
FB25-2
FB25-3
FB35-1
FB35-2
FB35-3
FB46-2
FB46-3
FB46-4
FB46-5
FB46-6
Item
Code
35516
35518
35520
35522
35524
35526
35528
35530
35532
35534
FB56-3
35536
FB57-3
FB57-4
FB57-5
FB57-6
FB57-7
FB57-8
FB58-3
FB58-4
FB58-5
FB68-3
FB68-3 1/4
FB68-4
FB68-5
FB68-6
FB68-7
FB68-8
FB68-10
FB69-4
FB69-6
FB69-10
FB610-3
FB610-4
FB610-5
FB610-6
FB610-8
FB610-10
35538
69191
69192
35540
69193
69194
35542
35544
35546
35548
35550
35552
35554
35556
69195
35558
35560
69196
35562
35564
69197
35566
39198
35568
69199
35570
FB612-4
35572
FB79-4
FB79-5
FB79-6
FB710-5
FB710-6
FB710-10
FB810-4
FB810-5
FB810-6
FB810-7
FB810-8
FB810-10
FB810-12
FB810-14
FB811-4
FB811-5
FB811-6
FB812-4
FB812-5
FB812-6
FB812-7
FB812-8
FB812-10
FB812-12
FB912-4
FB912-6
FB912-8
13611
13613
13615
35574
69200
35576
35578
35580
35582
69201
35584
35586
35588
35590
35592
69202
35594
35596
69203
35598
35600
35602
35604
35606
69204
69205
35608
F
.020 RADIUS
MAX.
B
D
A
E
C
STANDARD TOLERANCES
A
B
C
D
E
Dimensions
1/8 – 1 1/2
1 3/4 – 2 1/2
2 3/4 – 3 1/2
1/8 – 1 1⁄2
1 3⁄4 – 3
4
3/8 – 1 1/4
1 3/8 – 2 1/2
4
Tolerance
+.000, – .001
+.000, – .0015
+.000, – .002
± .005
± .0075
± .010
±.005
±.010
±.015
3/8 – 1 1/4
1 3/8 – 2 1/2
4
±.0025
±.005
±.010
CONCENTRICITY
Dimensions
A 1/8 - 1 1/2
1 5/8 - 3
3 1/4 - 3 1/2
Tolerance
.003
.004
.005
Prices on unlisted sizes and other Boston Gear
powder metal parts provided on request.
On A and B dimensions, tolerances apply to actual (decimal) dimensions.
P-1930-BG
04/10
Boston Gear 800-825-6544
141
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Flanged Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
F
A
B
5/8
.626
3/4
.753
13/16
.815
5/8
.627
7/8
.878
1
1.003
.020 RADIUS
MAX.
7/8
.878
B
D
A
3/4
.752
E
1
1.003
C
STANDARD TOLERANCES
A
B
C
D
E
Dimensions
1/8 – 1 1/2
1 3/4 – 2 1/2
2 3/4 – 3 1/2
1/8 – 1 1⁄2
1 3/4 – 3
4
3/8 – 1 1/4
1 3/8 – 2 1/2
4
3/8 – 1 1/4
1 3/8 – 2 1/2
4
Tolerance
+.000, – .001
+.000, – .0015
+.000, – .002
± .005
± .0075
± .010
± .005
± .010
± .015
± .0025
± .005
± .010
CONCENTRICITY
Dimensions
1/8 – 1 1/2
A
1 5/8 – 3
3 1/4 – 3 1/2
Tolerance
.003
.004
.005
Prices on unlisted sizes and other Boston Gear
powder metal parts provided on request.
15/16
.940
7/8
.877
1
1.002
1
1.003
1-1/8
1.128
1-1/4
1.253
1-3/8
1.378
C
Catalog
Number
FB1012-4
FB1012-5
FB1012-6
FB1012-8
FB1012-10
FB1013-5
FB1013-6
FB1013-8
FB1013-10
FB1013-11 1/2
FB1013-12
FB1013-16
FB1014-5
FB1014-6
FB1014-8
FB1014-14
FB1016-6
FB1016-8
FB1214-6
FB1214-8
FB1214-10
FB1215-8
FB1215-10
FB1215-12
FB1216-5
FB1216-6
FB1216-8
FB1216-10
FB1216-12
FB1216-16
FB1416-6
FB1416-8
FB1416-10
FB1418-8
FB1418-10
FB1418-12
FB1620-6
FB1620-8
FB1620-10
FB1620-12
FB1620-16
FB1622-8
FB1622-12
FB1622-14
FB1822-6
FB1822-8
FB1822-10
FB2024-8
FB2024-10
FB2024-12
FB2226-6
FB2226-8
Item
Code
35610
35612
35614
35616
35618
69206
35620
35622
35624
35626
35628
35630
69207
35632
35634
35636
69208
35638
35644
35646
69209
35648
69213
35650
69214
35652
35654
35656
35658
35660
35662
69210
35664
35666
69211
35668
35672
35674
35676
35678
35680
35682
69215
35684
13617
13619
13621
69216
35686
69217
13623
13625
3/16
FB2428-12
35688
D
E
1.000
1/8
1.063
5/32
1.125
5/32
1.250
5/32
1.125
5/32
1.188
5/32
1.250
5/32
1.250
5/32
1.375
5/32
1.500
3/16
1.625
3/16
1.750
1/8
1.750
3/16
2,000
1/8
1-1/2
2.063
1/2
5/8
3/4
1
1-1/4
5/8
3/4
1
1-1/4
1-7/16
1-1/2
2
5/8
3/4
1
1-3/4
3/4
1
3/4
1
1-1/4
1
1-1/4
1-1/2
5/8
3/4
1
1-1/4
1-1/2
2
3/4
1
1-1/4
1
1-1/4
1-1/2
3/4
1
1-1/4
1-1/2
2
1
1-1/2
1-3/4
3/4
1
1-1/4
1
1-1/4
1-1/2
3/4
1
1-1/8
1.127
1-3/8
1.377
1-1/4
1.252
1-1/2
1.503
1-3/8
1.377
1-1/2
1.503
1-5/8
1.628
1-3/4
1.754
2
2.003
2-1/4
2.254
3/4
1
1-1/4
2.500
1/8
FB3236-6
FB3236-8
FB3236-10
13627
13629
13631
2-3/4
2.752
3-1/4
3.255
1-1/2
4.000
3/16
FB4452-12
13635
On A and B dimensions, tolerances apply to actual (decimal) dimensions.
142
Boston Gear 800-825-6544
P-1930-BG
04/10
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Thrust Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
7/16
.4375
1/2
.500
5/8
.625
5/8
.625
3/4
.750
5/8
.625
3/4
.750
3/4
.750
3/4
.750
3/4
.750
7/8
.875
1
1.000
1-1/4
1.250
1
1.000
1-3/16
1.187
1-1/4
1.250
1-1/2
1.500
1-1/4
1.250
1-3/8
1.375
1/4
.255
5/16
.315
3/8
.385
3/8
.380
7/16
.440
1/2
.505
1/2
.505
1/2
.510
9/16
.565
5/8
.628
5/8
.6265
3/4
.753
Catalog
Number
Item
Code
A
1/16
TB47
13515
3/4
.765
1/16
TB48
13517
C
1/16
TB410
35766
1/16
TB510
13519
1/16
TB512
35768
1/16
TB610
13521
1/32
TB612
35770
1/8
TB612-2
13523
1/16
TB712
69218
1/16
TB812
35772
3/16
TB814
35774
1/16
TB816
35776
1/8
TB920
35778
1/8
TB1016
35780
3/32
TB1019
35782
1/8
TB1020
69219
1/8
TB1024
69220
1/8
TB1220
69221
1/8
TB1222
69222
7/8
.8905
7/8
.880
7/8
.8905
1
1.003
1
1.0155
1
1.0120
1
1.016
1
1.0155
1-1/8
1.140
1-1/4
1.253
1-1/4
1.265
1-1/9
1.255
1-3/8
1.379
1-1/2
1.503
1-1/2
1.505
1-1/2
1.510
1-9/16
1.578
1-3/4
1.765
2
2.011
2
2.031
2-1/16
2.062
2-1/2
2.502
On A and B dimensions, tolerances apply to
actual (decimal) dimensions.
BOST-BRONZ is stocked in this
convenient Plate form for ease in
machining to required bearing size
or shape — at your service for all
emergencies.
B
C
Catalog
Number
Item
Code
1-9/16
1.562
1-3/4
1.750
1-1/2
1.500
2
2.000
2-1/8
2.125
1-1/2
1.504
1-1/2
1.500
1-5/8
1.625
1-3/4
1.750
2
2.000
2-7/8
2.875
1-7/8
1.875
1-3/4
1.750
2
2.000
2-3/8
2.375
3-5/16
3.312
1-15/16
1.940
2
2.000
2-1/2
2.505
3-1/2
3.500
2-7/16
2.4375
2-5/8
2.625
3
3.000
3-5/8
2.625
4
4.000
3-1/4
3.250
3/32
TB1225
35784
1/8
TB1228
35786
1/8
TB1424
35788
1/8
TB1432
13525
1/8
TB1434
35790
1/8
TB1624
35792
3/16
TB1624-3
13527
1/4
TB1626-4
13529
1/8
TB1628
13531
1/8
TB1632
35794
1/8
TB1646
13533
1/8
TB1830
13535
1/8
TB2028
35796
1/8
TB2032
13537
1/8
TB2038
13539
1/8
TB2053
13541
1/8
TB2231
13543
1/8
TB2432
13545
1/8
TB2440
13547
3/16
TB2456
35798
1/8
TB2539
13549
1/8
TB2842
13551
1/4
TB3248
13553
3/16
TB3258
13555
1/8
TB3364
13557
1/8
TB4052
13559
F
B
A
C
STANDARD TOLERANCES
Dimensions
1/4 – 1 1/4
A 1 3/8 –2 1/2
7/16 – 1 1/2
B
1 9/16 – 3
3 1/4 – 4
C
All
Tolerance
±.010
±.015
±.010
±.015
±.020
± .0025
Plate Stock
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
1/8
3/16
1/4
5/16
3/8
1/2
5/8
3/4
1
3/16
1/4
B
C
5
6
5
6
5
8
Catalog
Number
PB5602
PB5603
PB5604
PB5605
PB5606
PB5608
PB5610
PB5612
PB5616
PB5803
PB5804
Item
Code
35692
35694
35696
35698
35700
35702
35704
35706
35708
35710
35712
Keep BOST-BRONZ plate stock on hand for: Breakdowns –
maintenance and repairs – Producing small lots of special sizes –
Experimental and development work.
P-1930-BG
04/10
A
B
C
STANDARD TOLERANCES
Dimensions
A
All
Tolerance
±.010 to –.005
Boston Gear 800-825-6544
143
BOST-BRONZ Oil-Impregnated Sintered Bronze Bearings
Cored Bars
BOST-BRONZ is stocked in these convenient Bar forms for ease in
machining to required bearing size or shape — at your service for all
emergencies.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
F
A
B
1
1-1/4
1-1/2
1
1-1/4
1-3/8
1-1/2
1-3/4
1-1/4
1-1/2
1-3/4
2
2-1/2
1-3/8
1-1/2
1-3/4
2
2-1/4
2-1/2
3
1-3/4
2
2-1/4
2-1/2
3
2
2
2-1/4
2-1/2
3
3-1/2
1/2
5/8
3/4
7/8
B
A
1
1-1/4
STANDARD TOLERANCES
Dimensions
A
All
B
All
Tolerance
–1/8”
+1/8”
1-3/8
1-1/2
Solid Bars
STANDARD TOLERANCES
144
Item
Code
35402
35404
35406
35408
35410
35412
35414
35416
35418
35420
35422
35424
35426
35428
35430
35432
35434
35436
35438
35440
35442
35444
35446
35448
35450
35452
35456
35458
35460
35462
35464
A
B
2-1/4
2-1/2
2-3/4
3
3-1/2
2-3/4
3
3-1/4
4
4-1/2
5
3
3-1/2
3-3/4
3
3-1/2
3-3/4
4
5
6
4-3/4
6
7
1-3/4
2
2-1/4
2-3/8
2-1/2
3
3-1/2
4
5
Catalog
Number
CB2836
CB2840
CB2844
CB2848
CB2856
CB3244
CB3248
CB3252
CB3264
CB3272
CB3280
CB3648
CB3656
CB3660
CB3848
CB4056
CB4860
CB4864
CB4880
CB4896
CB5676
CB6496
CB80112
Item
Code
35466
35468
35470
35472
35474
35476
35478
35480
35482
35484
35486
35488
35490
35492
35494
35496
35498
35500
35502
35504
35506
35512
35514
All bars are 6 1/2" long.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
B
Dimensions
B
All
Catalog
Number
CB816
CB820
CB824
CB1016
CB1020
CB1022
CB1024
CB1028
CB1220
CB1224
CB1228
CB1232
CB1240
CB1422
CB1624
CB1628
CB1632
CB1636
CB1640
CB1648
CB2028
CB2032
CB2036
CB2040
CB2048
CB2232
CB2432
CB2436
CB2440
CB2448
CB2456
Tolerance
+ 1/8”
Boston Gear 800-825-6544
B
Length
1/4
3/8
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
2
2-1/4
2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
6
7
8
2
3
6-1/2
6-1/2
6-1/2
6-1/2
6-1/2
6-1/2
Catalog
Number
SB4
SB6
SB8
SB10
SB12
SB14
SB16
SB18
SB20
SB22
SB24
SB26
SB28
SB32
SB36
SB40
SB48
SB56
SB64
SB72
SB80
SB88
SB96
SB112
SB128
Item
Code
35714
35716
35718
35720
35722
35724
35726
35728
35730
35732
35734
35736
35738
35742
35744
35746
35748
35750
35752
35754
35756
35758
35760
35762
35764
P-1930-BG
04/10
BEAR-N-BRONZE 660 Cast Bronze Bearings
F
Adaptability
BEAR-N-BRONZ bearings are completely machined to close
tolerances permitting wider housing-bore tolerances. BEAR-NBRONZ bars are machined all over.
Composition
(%)
Copper (Cu)
Tin (Sn)
Lead (Pb)
Zinc (Zn)
83
7
7
3
Avg.
Avg.
Yield
ElongaBrinnell
Tensile
Strength
tion in
Hardness
Strength
0.2%
Two Inch
(500 Kg
(Lbs. Per
Offset
(%)
Load)
Sq. In.)
(Lbs. Per
Sq. In.)
35,000
20,000
15
60
Bear-N-Bronz conforms to SAE CA932 (660)
and ASTM B584-78 (alloy C93200)
specifications.
Special Compositions
In addition to our standard BEAR-N-BRONZ (SAE CA 932)
material, many special compositions can be furnished on a madeto-order basis.
Average
Yield Strength
0.2% Offset
(Lbs. Per Sq. In.)
Average
Tensile Strength
(Lbs. Per Sq. In.)
Elongation in
Two Inch (%)
Brinnell
Hardness
(500 Kg Load)
206
Leaded
Gun Metal
CA927
Copper (Cu) 88
Tin
(Sn) 1040,00020,000
Lead (Pb) 2
210
Gun
Metal
CA905
Copper (Cu) 88
Tin
(Sn) 10
Zinc (Zn) 2
305
Phosphor
Bronze
CA937
319
Semi-Plastic
Bronze
CA938
Composition
(%)
BEAR-N-BRONZ is chemically and metallurgically tested to
assure conformance to specifications. All parts are rigidly
inspected to assure freedom from porosity and conformance
to dimensional tolerances.
Equivalent
S.A.E. Number
Quality
The Chemical compositions and physical properties of some
of the more popular are listed.
Grade
BEAR-N-BRONZ is Boston Gear’s general purpose cast, solid
bronze bearing material. It is a high grade, leaded-tin bronze,
having good hardness, strength, wear-resistance, and
exceptional anti-friction qualities. It is particularly suited for
moderate to heavy loads at normal to relatively high speeds.
25
70
45,000
22,000
25
65
Copper (Cu) 80
Tin
(Sn) 10
Lead (Pb) 10
35,000
18,000
20
63
Copper (Cu) 78
Tin
(Sn) 7
Lead (Pb) 15
30,000
17,000
15
55
Selection
In general, sleeve bearings should be selected with a length of
one to two times the shaft diameter and an O.D. approximately
25% larger than the shaft diameter.
A general guide to determination of limiting load and velocity
values for sleeve bearings has been established by the use of
PV calculations. PV represents Pressure x Velocity, for
example 100 psi x 20 fpm yields a PV of 2000.
Maximum PV value for BEAR-N-BRONZ bearings: 75,000.
For complete selection and application information, see
Engineering Section, Pages 174-182.
P-1930-BG
04/10
Boston Gear 800-825-6544
145
BEAR-N-BRONZE 660 Cast Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
3/16
5/16
F
3/8
1/4
7/16
7/16
5/16
1/2
1/2
B
A
3/8
9/16
5/8
C
9/16
5/8
7/16
11/16
3/4
13/16
STANDARD TOLERANCES
Dimensions
3/16 – 3
A
3-1/4 – 4-1/2
5/16 – 3
B
3-1/8 – 5
C
All
Tolerance
±.001
±.0015
+.002 to +.003
+.003 to +.005
±.005
5/8
11/16
STANDARD CONCENTRICITY
Dimensions
A
All
T.I.R. (A to B)
.003
For Oil Grooves see Page 179.
1/2
3/4
13/16
7/8
1
146
Boston Gear 800-825-6544
C
1/2
3/4
1
3/4
1
1-1/4
3/4
1
1-1/4
3/4
1
1-1/4
3/4
1
1-1/4
3/4
1
1-1/4
1-1/2
3/4
1
1-1/4
3/4
1
1-1/4
1-1/2
1
1-1/4
1-1/2
1
1-1/4
1-1/2
2
1-1/2
1
1-1/4
1-1/2
1-1/2
5/8
3/4
7/8
1
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/4
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
1
1-1/2
2-1/4
1
1-1/4
1-1/2
1-3/4
2
1
Catalog
Number
M35-4
M35-6
M35-8
M46-6
M46-8
M46-10
M47-6
M47-8
M47-10
M57-6
M57-8
M57-10
M58-6
M58-8
M58-10
M68-6
M68-8
M68-10
M68-12
M69-6
M69-8
M69-10
M610-6
M610-8
M610-10
M610-12
M79-8
M79-10
M79-12
M710-8
M710-10
M710-12
M710-16
M711-12
M712-8
M712-10
M712-12
M713-12
M810-5
M810-6
M810-7
M810-8
M810-10
M810-11
M810-12
M810-14
M810-16
M810-18
M811-6
M811-8
M811-10
M811-12
M811-14
M811-16
M811-18
M811-20
M812-6
M812-8
M812-10
M812-12
M812-14
M812-16
M812-18
M812-20
M812-22
M813-8
M813-12
M813-18
M814-8
M814-10
M814-12
M814-14
M814-16
M816-8
Item
Code
31308
31310
31312
31314
31316
31318
31320
31322
31324
31326
31328
31330
31332
31334
31336
31338
31340
31342
31344
31346
31348
31350
31362
31364
31366
31368
31352
31354
31356
31370
31372
31374
31376
31378
31380
31382
31384
31386
31388
31390
31392
31394
31396
31398
31400
31402
31404
31406
31408
31410
31412
31414
31416
31418
31420
31422
31424
31426
31428
31430
31432
31434
31436
31438
31440
31442
31444
31446
31448
31450
31452
31454
31456
31458
A
B
1/2
1
11/16
3/4
9/16
13/16
7/8
3/4
13/16
5/8
7/8
15/16
1
1-1/8
13/16
7/8
11/16
15/16
1
C
1-1/2
2
2-1/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
1
1-1/4
1-1/2
1-3/4
2
2-1/2
1
1-1/4
1-1/2
1-3/4
2
1
1-1/2
2
1
1-1/8
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
3
1
1-1/2
2-1/2
1
1-1/2
2
2-1/4
2-1/2
3
1-1/2
2
2-1/4
1
1-1/2
1-3/4
2
1
1-1/4
1-1/2
2
2-1/2
1
1-1/4
1-1/2
2-1/2
1-1/4
2-1/4
2-1/2
Catalog
Number
M816-12
M816-16
M816-18
M911-8
M911-10
M911-12
M911-14
M911-16
M911-18
M912-8
M912-10
M912-12
M912-14
M912-16
M912-20
M913-8
M913-10
M913-12
M913-14
M913-16
M914-8
M914-12
M914-16
M1012-8
M1012-9
M1012-10
M1012-12
M1012-14
M1012-16
M1012-18
M1012-20
M1013-8
M1013-10
M1013-12
M1013-14
M1013-16
M1013-18
M1013-20
M1014-6
M1014-8
M1014-10
M1014-12
M1014-14
M1014-16
M1014-18
M1014-20
M1014-24
M1015-8
M1015-12
M1015-20
M1016-8
M1016-12
M1016-16
M1016-18
M1016-20
M1016-24
M1018-12
M1018-16
M1018-18
M1113-8
M1113-12
M1113-14
M1113-16
M1114-8
M1114-10
M1114-12
M1114-16
M1114-20
M1115-8
M1115-10
M1115-12
M1115-20
M1116-10
M1116-18
M1116-20
P-1930-BG
Item
Code
31460
31462
31464
31466
31468
31470
31472
31474
31476
31480
31482
31484
31486
31488
31492
31494
31496
31498
31500
31502
31506
31508
31510
31512
31514
31516
31518
31520
31522
31524
31526
31528
31530
31532
31534
31536
31538
31540
31542
31544
31548
31550
31552
31554
31556
31558
31560
31562
31564
31568
31570
31572
31574
31576
31578
31580
31582
31584
31586
31588
31592
31594
31596
31600
31602
31604
31608
31612
31614
31616
31618
31626
31628
31634
31636
04/10
BEAR-N-BRONZE 660 Cast Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
7/8
15/16
3/4
1
1-1/16
1-1/8
1-3/16
1-1/4
15/16
1
13/16
1-1/16
1-1/8
1
7/8
1-1/16
1-1/8
P-1930-BG
04/10
C
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
3
3/4
1
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/8
2-1/4
2-1/2
2-3/4
3
3-1/2
1
1-1/2
2
3
1
1-1/2
2
2-1/2
3
1-1/2
2
1-3/4
2
2-1/2
3
1
1-1/2
2
1-1/2
2
2-1/2
1-1/2
2
2-3/4
1-1/2
2
1
1-1/4
1-3/8
1-1/2
1-5/8
2
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
3
3/4
1
1-1/4
1-3/8
Catalog
Number
M1214-6
M1214-8
M1214-10
M1214-12
M1214-14
M1214-16
M1214-18
M1214-20
M1215-8
M1215-10
M1215-12
M1215-14
M1215-16
M1215-18
M1215-20
M1215-24
M1216-6
M1216-8
M1216-9
M1216-10
M1216-11
M1216-12
M1216-14
M1216-16
M1216-17
M1216-18
M1216-20
M1216-22
M1216-24
M1216-28
M1217-8
M1217-12
M1217-16
M1217-24
M1218-8
M1218-12
M1218-16
M1218-20
M1218-24
M1219-12
M1219-16
M1220-14
M1220-16
M1220-20
M1220-24
M1315-8
M1315-12
M1315-16
M1316-12
M1316-16
M1316-20
M1317-12
M1317-16
M1317-22
M1318-12
M1318-16
M1416-8
M1416-10
M1416-11
M1416-12
M1416-13
M1416-16
M1417-8
M1417-10
M1417-12
M1417-14
M1417-16
M1417-18
M1417-20
M1417-24
M1418-6
M1418-8
M1418-10
M1418-11
Item
Code
31640
31642
31644
31646
31648
31650
31652
31654
31656
31658
31662
31664
31666
31668
31670
31674
31676
31678
31680
31682
31684
31686
31688
31690
31692
31694
31696
31698
31700
31702
31704
31706
31708
31714
31716
31718
31720
31724
31726
31728
31730
31734
31736
31740
31742
31744
31748
31750
31752
31756
31758
31760
31762
31766
31770
31772
31788
31790
31792
31794
31796
31798
31800
31802
31804
31806
31808
31810
31812
31816
31818
31820
31822
31824
A
B
1-1/8
7/8
1-3/16
1-1/4
1-3/8
1-1/8
1-3/16
15/16
1-1/4
1-5/16
1-1/8
1-3/16
1
1-1/4
1-5/16
1-3/8
C
1-1/2
1-3/4
2
2-1/4
2-1/2
3
3-1/4
3-1/2
1
3
1-1/2
1-3/4
2
2-1/4
2-1/2
3
3-1/2
1-1/2
2
2-1/2
3
1-1/2
2
1-1/4
1-1/2
2
3
1
1-1/2
2
2-1/2
2-3/4
1-1/2
2
1-3/8
1-1/2
1-3/4
2
2-1/2
7/8
1-1/4
1-1/2
1-3/4
2
2-1/2
3/4
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
2
2-1/4
2-1/2
2-3/4
3
4
4-1/2
1-1/2
2
2-1/4
2-1/2
3
3-1/2
1-1/4
1-1/2
1-3/4
2
Catalog
Number
M1418-12
M1418-14
M1418-16
M1418-18
M1418-20
M1418-24
M1418-26
M1418-28
M1419-8
M1419-24
M1420-12
M1420-14
M1420-16
M1420-18
M1420-20
M1420-24
M1420-28
M1422-12
M1422-16
M1422-20
M1422-24
M1518-12
M1518-16
M1519-10
M1519-12
M1519-16
M1519-24
M1520-8
M1520-12
M1520-16
M1520-20
M1520-22
M1521-12
M1521-16
M1618-11
M1618-12
M1618-14
M1618-16
M1618-20
M1619-7
M1619-10
M1619-12
M1619-14
M1619-16
M1619-20
M1620-6
M1620-8
M1620-9
M1620-10
M1620-11
M1620-12
M1620-13
M1620-14
M1620-16
M1620-18
M1620-20
M1620-22
M1620-24
M1620-32
M1620-36
M1621-12
M1621-16
M1621-18
M1621-20
M1621-24
M1621-28
M1622-10
M1622-12
M1622-14
M1622-16
Item
Code
31826
31828
31830
31832
31834
31836
31838
31840
31842
31852
31854
31856
31858
31860
31862
31864
31866
31868
31872
31874
31876
31878
31880
31884
31886
31888
31894
31896
31898
31900
31902
31904
31906
31910
31916
31918
31920
31922
31924
31926
31928
31930
31932
31934
31936
31938
31940
31942
31944
31946
31948
31950
31952
31954
31956
31958
31960
31962
31968
31970
31972
31974
31976
31978
31980
31982
31988
31990
31992
31994
F
B
A
C
STANDARD TOLERANCES
Dimensions
3/16 – 3
A
3-1/4 – 4-1/2
5/16 – 3
B
3-1/8 – 5
C
All
Tolerance
±.001
±.0015
+.002 to +.003
+.003 to +.005
±.005
STANDARD CONCENTRICITY
Dimensions
A
All
T.I.R. (A to B)
.003
For Oil Grooves see Page 179.
Boston Gear 800-825-6544
147
BEAR-N-BRONZE 660 Cast Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
F
B
1-3/8
1
1-1/2
1-5/8
1-3/4
2
B
1-5/16
A
1-1/16
1-7/16
1-1/4
C
1-5/16
1-3/8
1-1/8
1-7/16
STANDARD TOLERANCES
Dimensions
3/16 – 3
A
3-1/4 – 4-1/2
5/16 – 3
B
3-1/8 – 5
C
All
Tolerance
±.001
±.0015
+.002 to +.003
+.003 to +.005
±.005
1-1/2
1-5/8
1-7/8
2
STANDARD CONCENTRICITY
Dimensions
A
All
T.I.R. (A to B)
.003
1-3/8
For Oil Grooves see Page 179.
1-7/16
1-3/16
1-1/2
1-9/16
1-5/8
148
Boston Gear 800-825-6544
C
2-1/2
2-3/4
3
3-1/2
4
4-1/2
1-1/2
1-3/4
2
2-1/2
3
4
2
2-1/2
3
3-1/2
6-1/2
3
6-1/2
1-1/2
2
2-1/2
2-1/2
1-1/2
1-3/4
2
2-1/4
2-1/2
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
3
3-1/4
3-1/2
4
1-1/2
3
1-1/2
2
2-1/2
3
3-1/2
4
1-3/4
2
2-1/2
3
3-1/2
4-1/2
6-1/2
3
1-3/4
2
2-1/2
1-1/4
1-1/2
2
2-1/2
3
3-1/2
2
3
4
3
3-1/2
2
2-1/2
3
Catalog
Number
M1622-20
M1622-22
M1622-24
M1622-28
M1622-32
M1622-36
M1624-12
M1624-14
M1624-16
M1624-20
M1624-24
M1624-32
M1626-16
M1626-20
M1626-24
M1626-28
M1628-52
M1632-24
M1632-52
M1721-12
M1721-16
M1721-20
M1723-20
M1820-12
M1820-14
M1820-16
M1821-18
M1821-20
M1822-8
M1822-10
M1822-12
M1822-14
M1822-16
M1822-18
M1822-20
M1822-24
M1822-26
M1822-28
M1822-32
M1823-12
M1823-24
M1824-12
M1824-16
M1824-20
M1824-24
M1824-28
M1824-32
M1826-14
M1826-16
M1826-20
M1826-24
M1826-28
M1826-36
M1830-52
M1832-24
M1922-14
M1922-16
M1922-20
M1923-10
M1923-12
M1923-16
M1923-20
M1923-24
M1923-28
M1924-16
M1924-24
M1924-32
M1925-24
M1925-28
M1926-16
M1926-20
M1926-24
Item
Code
31996
31998
32000
32004
32006
32008
32010
32012
32014
32016
32018
32020
32022
32024
32026
32028
32030
32032
32034
32036
32038
32040
32050
32062
32064
32066
32068
32070
32072
32074
32076
32078
32080
32082
32084
32086
32088
32090
32092
32094
32098
32102
32104
32106
32108
32110
32112
32114
32116
32118
32120
32122
32126
32128
32130
32134
32136
32138
32140
32142
32144
32146
32148
32150
32152
32154
32158
32162
32164
32166
32168
32170
A
B
1-3/16 1-11/16
1-7/16
1-1/2
1-9/16
1-1/4
1-5/8
1-11/16
1-3/4
1-7/8
2
1-1/2
1-5/16
1-5/8
1-13/16
1-7/8
1-1/2
1-3/8
1-5/8
1-11/16
C
2
2-1/2
3
2-1/2
3
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
4
4-1/4
4-1/2
5
5-1/2
2
2-1/2
3
3-1/2
3-3/4
1-3/4
2
2-1/2
3
3-1/4
3-1/2
4
4-1/2
4-3/4
2
3-1/4
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/2
3-3/4
4
5
2
2-1/2
4
3
4
6-1/2
1-3/4
3
2
3
4-3/4
3
4
3-1/2
1-3/4
2
2-1/2
2
3
3-1/4
3-1/2
4
3-1/2
Catalog
Number
M1927-16
M1927-20
M1927-24
M2023-20
M2023-24
M2024-8
M2024-9
M2024-10
M2024-11
M2024-12
M2024-13
M2024-14
M2024-16
M2024-18
M2024-20
M2024-22
M2024-24
M2024-26
M2024-28
M2024-32
M2024-34
M2024-36
M2024-40
M2024-44
M2025-16
M2025-20
M2025-24
M2025-28
M2025-30
M2026-14
M2026-16
M2026-20
M2026-24
M2026-26
M2026-28
M2026-32
M2026-36
M2026-38
M2027-16
M2027-26
M2028-14
M2028-16
M2028-18
M2028-20
M2028-22
M2028-24
M2028-28
M2028-30
M2028-32
M2028-40
M2030-16
M2030-20
M2030-32
M2032-24
M2032-32
M2032-52
M2124-14
M2124-24
M2126-16
M2126-24
M2126-38
M2129-24
M2129-32
M2130-28
M2224-14
M2224-16
M2224-20
M2226-16
M2226-24
M2226-26
M2226-28
M2226-32
M2227-28
P-1930-BG
Item
Code
32172
32174
32176
32180
32182
32184
32186
32188
32190
32192
32194
32196
32198
32200
32202
32204
32206
32208
32210
32212
32214
32216
32218
32220
32222
32224
32226
32228
32230
32232
32234
32236
32238
32240
32242
32244
32246
32248
32250
32254
32258
32260
32262
32264
32266
32268
32270
32272
32274
32276
32278
32280
32284
32286
32288
32290
32296
32298
32306
32310
32314
32324
32328
32330
32334
32336
32338
32340
32342
32344
32346
32348
32352
04/10
BEAR-N-BRONZE 660 Cast Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
1-3/4
1-3/8
1-7/8
2
2-1/8
1-5/8
1-11/16
1-7/16
1-3/4
1-13/16
1-7/8
1-15/16
2
1-5/8
1-11/16
1-3/4
1-13/16
1-7/8
1-1/2
2
2-1/8
2-1/4
1-9/16 1-13/16
1-15/16
1-5/8
P-1930-BG
1-7/8
04/10
C
2
2-1/4
2-1/2
3
3-1/2
4
3
3-1/2
4
4-1/2
3
4
6-1/2
1-3/4
2-3/4
3
2-1/2
3
3-1/2
4
2-1/4
3
4
3
4-1/4
3
4
4-1/2
5
2
3
4
2
2-3/4
1-3/4
2
2-1/4
2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
3
2
2-1/2
2-3/4
3
3-1/2
4
4-1/2
5
5-1/2
2-1/2
3
3-1/2
4
4-1/2
5
3
4
3
4
5
6-1/2
3
3-1/2
3-1/2
2-1/4
3
3-3/4
Catalog
Number
M2228-16
M2228-18
M2228-20
M2228-24
M2228-28
M2228-32
M2230-24
M2230-28
M2230-32
M2230-36
M2232-24
M2232-32
M2234-52
M2326-14
M2326-22
M2326-24
M2327-20
M2327-24
M2327-28
M2327-32
M2328-18
M2328-24
M2328-32
M2329-24
M2329-34
M2330-24
M2330-32
M2330-36
M2330-40
M2331-16
M2331-24
M2332-32
M2426-16
M2427-22
M2428-14
M2428-16
M2428-18
M2428-20
M2428-24
M2428-28
M2428-32
M2428-36
M2428-40
M2428-44
M2429-24
M2430-16
M2430-20
M2430-22
M2430-24
M2430-28
M2430-32
M2430-36
M2430-40
M2430-44
M2432-20
M2432-24
M2432-28
M2432-32
M2432-36
M2432-40
M2434-24
M2434-32
M2436-24
M2436-32
M2436-40
M2436-52
M2529-24
M2529-28
M2531-28
M2630-18
M2630-24
M2630-30
Item
Code
32354
32356
32358
32360
32362
32364
32366
32368
32370
32372
32374
32376
32378
32380
32382
32384
32386
32388
32390
32392
32396
32398
32400
32402
32410
32414
32416
32420
32422
32424
32426
32438
32440
32442
32444
32446
32448
32450
32452
32454
32456
32458
32460
32462
32464
32466
32468
32470
32472
32474
32476
32478
32480
32482
32484
32486
32488
32490
32492
32494
32496
32498
32500
32502
32504
32506
32508
32510
32514
32518
32520
32522
A
1-5/8
B
2
2-1/8
1-15/16
2
1-11/16 2-1/16
2-3/16
2-1/4
2
2-1/16
2-1/8
1-3/4
2-1/4
2-3/8
2-1/2
2-3/16
1-13/16 2-5/16
2-1/8
1-7/8
2-1/4
2-3/8
2-3/16
2-1/4
1-15/16 2-5/16
2-3/8
2-7/16
2-1/2
C
1-3/4
2-1/2
2
4
5
5-1/2
3
4
3
3-1/2
3-1/2
4-1/2
3
4
4-1/2
5-1/2
2
3
4
3
4-1/2
2-1/4
2-1/2
3
4
4-1/2
5-1/4
3-1/2
2-3/4
3-1/4
3-1/2
4
4-1/4
5
1-3/4
2
2-1/2
3
3-1/2
4
4-1/4
5
3-1/2
5
6-1/2
4
4
5
2-1/2
3
4
3
5
3
4
5-1/4
2
3
3
4-1/2
3-1/2
4
5
6-1/4
4
5-1/2
3
3
5
Catalog
Number
M2632-14
M2632-20
M2632-24
M2632-32
M2632-40
M2632-44
M2634-24
M2634-32
M2731-24
M2731-28
M2732-28
M2732-36
M2733-24
M2733-32
M2733-36
M2733-44
M2735-16
M2735-24
M2735-32
M2736-24
M2736-36
M2832-18
M2832-20
M2832-24
M2832-32
M2832-36
M2832-42
M2833-28
M2834-22
M2834-26
M2834-28
M2834-32
M2834-34
M2834-40
M2836-14
M2836-16
M2836-20
M2836-24
M2836-28
M2836-32
M2836-34
M2836-40
M2838-28
M2838-40
M2840-52
M2935-32
M2937-32
M2937-40
M3034-20
M3034-24
M3034-32
M3036-24
M3036-40
M3038-24
M3038-32
M3038-42
M3135-16
M3135-24
M3136-24
M3136-36
M3137-28
M3137-32
M3137-40
M3137-50
M3138-32
M3138-44
M3139-24
M3140-24
M3140-40
Item
Code
32526
32528
32530
32534
32538
32540
32542
32544
32550
32552
32554
32556
32558
32562
32564
32568
32570
32574
32578
32586
32588
32590
32592
32594
32596
32598
32600
32602
32604
32606
32608
32610
32612
32614
32618
32620
32622
32624
32626
32628
32630
32632
32634
32638
32640
32642
32646
32648
32650
32652
32654
32656
32662
32664
32666
32668
32670
32672
32676
32678
32680
32682
32684
32688
32692
32694
32696
32704
32706
F
B
A
C
STANDARD TOLERANCES
Dimensions
3/16 – 3
A
3-1/4 – 4-1/2
5/16 – 3
B
3-1/8 – 5
C
All
Tolerance
±.001
±.0015
+.002 to +.003
+.003 to +.005
±.005
STANDARD CONCENTRICITY
Dimensions
A
All
T.I.R. (A to B)
.003
For Oil Grooves see Page 179.
Boston Gear 800-825-6544
149
BEAR-N-BRONZE 660 Cast Bronze Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
F
B
2-1/4
2-3/8
2
2-1/2
2-5/8
2-3/4
2-1/2
B
A
2-1/8
2-5/8
2-5/8
C
2-11/16
2-3/16
2-3/4
2-7/8
2-1/2
2-5/8
STANDARD TOLERANCES
Dimensions
3/16 – 3
A
3-1/4 – 4-1/2
5/16 – 3
B
3-1/8 – 5
C
All
Tolerance
±.001
±.0015
+.002 to +.003
+.003 to +.005
±.005
2-11/16
2-1/4
2-3/4
3
2-3/4
2-3/8
2-7/8
STANDARD CONCENTRICITY
Dimensions
A
All
2-3/4
T.I.R. (A to B)
.003
2-7/8
2-7/16 2-15/16
For Oil Grooves see Page 179.
3
2-3/4
2-7/8
2-1/2
3
150
Boston Gear 800-825-6544
C
2
2-1/2
3
3-1/2
4
4-1/2
3
3-1/2
4
4-1/2
2-1/2
3
3-1/2
4
4-1/2
5
6
4
6-1/2
3
4
4
5
6
4
5
3-1/2
4-1/2
5
4-1/2
5-1/4
6
4-1/2
3-1/2
4
3
4
5
4-3/4
3-1/2
4
4-1/2
5
6
3-1/2
5
4
6
4
5
4
5
3
5
4
5
6-1/4
3-3/4
5
6-/14
4
5
3-1/4
4-1/2
4
5
6
7
Catalog
Number
M3236-16
M3236-20
M3236-24
M3236-28
M3236-32
M3236-36
M3238-24
M3238-28
M3238-32
M3238-36
M3240-20
M3240-24
M3240-28
M3240-32
M3240-36
M3240-40
M3240-48
M3242-32
M3244-52
M3440-24
M3440-32
M3442-32
M3442-40
M3442-48
M3542-32
M3542-40
M3543-28
M3543-36
M3543-40
M3544-36
M3544-42
M3544-48
M3546-36
M3640-28
M3640-32
M3642-24
M3642-32
M3642-40
M3643-38
M3644-28
M3644-32
M3644-36
M3644-40
M3644-48
M3648-28
M3648-40
M3844-32
M3844-48
M3846-32
M3846-40
M3944-32
M3944-40
M3946-24
M3946-40
M3947-32
M3947-40
M3947-50
M3948-30
M3948-40
M3948-50
M4044-32
M4044-40
M4046-26
M4046-36
M4048-32
M4048-40
M4048-48
M4048-56
Item
Code
32708
32710
32712
32714
32718
32720
32724
32726
32728
32730
32732
32734
32736
32738
32740
32742
32746
32748
32750
32752
32754
32756
32758
32760
32762
32764
32766
32770
32772
32774
32776
32778
32780
32782
32784
32786
32788
32790
32792
32794
32796
32798
32800
32802
32806
32808
32812
32816
32818
32820
32824
32826
32828
32830
32832
32834
32836
32838
32840
32842
32844
32846
32848
32850
32852
32854
32856
32858
A
B
3-1/8
2-1/2
3-1/4
3-1/2
3
2-5/8
3-1/8
3-1/4
3-3/8
2-11/16 3-3/16
3-1/8
2-3/4
3-1/4
2-7/8
3-1/2
2-15/16 3-7/16
3-3/8
3
3-1/4
3-1/2
3-5/8
3-3/4
4
3-1/2
3-3/4
3-7/16 3-15/16
4
3-1/2
4-1/8
4-1/4
3-3/4
4-1/4
4-1/2
4-1/2
4
5
4-3/4
4-1/4
5
4-1/2
5
C
3-1/2
4
4-1/2
4
5
6
7-1/4
6-1/2
3
5
5
6
7-1/4
7
6-1/2
6-1/4
4
5
6
4
5
6
4-1/2
6-3/4
3-1/2
5
6-1/2
4-1/2
8
4-1/2
6
9
5
6-1/4
6-1/2
4
5
4-1/2
6-1/2
5-1/2
7
6
4-1/2
7
9-3/4
5
7
6-1/2
4
6
7
5
6
5
6
7
5
6
7
6
7
8
Catalog
Number
M4050-28
M4050-32
M4050-36
M4052-32
M4052-40
M4052-48
M4052-58
M4056-52
M4248-24
M4248-40
M4250-40
M4250-48
M4250-58
M4252-56
M4254-52
M4351-50
M4450-32
M4450-40
M4450-48
M4452-32
M4452-40
M4452-48
M4656-36
M4656-54
M4755-28
M4755-40
M4755-52
M4854-36
M4854-64
M4856-36
M4856-48
M4856-72
M4858-40
M4860-50
M4864-52
M5256-32
M5260-40
M5563-36
M5563-52
M5664-44
M5664-56
M5666-48
M5668-36
M5668-56
M5668-78
M6068-40
M6068-56
M6072-52
M6472-32
M6472-48
M6472-56
M6480-40
M6480-48
M6876-40
M6876-48
M6876-56
M6880-40
M6880-48
M6880-56
M7280-48
M7280-56
M7280-64
P-1930-BG
Item
Code
32860
32862
32864
32868
32870
32872
32874
32876
32878
32882
32884
32886
32888
32890
32892
32898
32900
32902
32904
32906
32908
32910
32926
32928
32930
32932
32934
32936
32938
32940
32942
32944
32946
32952
32954
32956
32958
32964
32966
32968
32970
32972
32974
32976
32978
32980
32982
32984
32986
32988
32990
32992
32994
32998
33000
33002
33004
33006
33008
33010
33012
33014
04/10
BEAR-N-BRONZE 660 Cast Bronze Bearings
Cored Bars
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
1/2
5/8
3/4
7/8
1
B
1
1-1/8
1-1/4
1-1/2
1-3/4
2
1
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
1
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
2
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
1-7/8
2
2-1/4
2-1/2
2-3/4
3
2-1/4
3-1/2
4
Aprx.
Wgt.
(Lbs.)
2-3/4
3-3/4
4-3/4
7
9-3/4
12-3/4
2
3
4
5
6-1/2
9
1-1/2
2-1/2
3-1/2
4-1/2
5-1/2
8
11-1/2
15
19-1/2
24
1-7/8
2-7/8
4
5
6-1/2
7-1/2
11
2
3-1/8
4-1/2
5-1/2
7
8-1/2
10
13-1/2
17-1/2
22
27
32
37-1/2
50
Catalog
Number
Item
Code
MCB816
MCB818
MCB820
MCB824
MCB828
MCB832
MCB1016
MCB1018
MCB1020
MCB1022
MCB1024
MCB1028
MCB1216
MCB1218
MCB1220
MCB1222
MCB1224
MCB1228
MCB1232
MCB1236
MCB1240
MCB1244
MCB1418
MCB1420
MCB1422
MCB1424
MCB1426
MCB1428
MCB1432
MCB1620
MCB1622
MCB1624
MCB1626
MCB1628
MCB1630
MCB1632
MCB1636
MCB1640
MCB1644
MCB1648
MCB1652
MCB1656
MCB1664
33016
33018
33020
33024
33026
33028
47640
33030
33032
33034
33036
33040
47641
47642
33046
33048
33050
33054
33058
33062
33064
33066
47643
47644
33068
33070
33072
33074
33078
47645
47646
33084
33086
33088
33090
33092
33096
33100
33102
33104
33106
33108
33110
A
1-1/8
1-1/4
1-3/8
1-1/2
B
1-3/8
1-1/2
1-5/8
2-1/8
2-3/8
2-1/2
2-3/4
2-7/8
1-1/2
1-5/8
1-3/4
1-7/8
2
2-1/8
2-1/4
2-3/8
2-1/2
2-3/4
3
3-1/4
3-1/2
1-3/4
1-7/8
2
2-1/8
2-1/4
2-3/8
1-3/4
1-7/8
2
2-1/8
2-1/4
2-3/8
2-1/2
2-3/4
3-1/4
3-1/2
3-3/4
4
4-1/2
Aprx.
Wgt.
(Lbs.)
2-1/4
4-1/2
5
11-1/2
15
16-1/2
21
24
2-1/2
3-7/8
5-1/2
7
8-1/2
10-1/2
12
14
16
20
25
30
35-1/2
4-1/4
6
7-1/2
9-1/2
11
12-1/2
3
4-1/2
6
8
10
11-1/2
14
18
27-1/2
33
40
45
62
Catalog
Number
Item
Code
MCB1822
MCB1824
MCB1826
MCB1834
MCB1838
MCB1840
MCB1844
MCB1846
MCB2024
MCB2026
MCB2028
MCB2030
MCB2032
MCB2034
MCB2036
MCB2038
MCB2040
MCB2044
MCB2048
MCB2052
MCB2056
MCB2228
MCB2230
MCB2232
MCB2234
MCB2236
MCB2238
MCB2428
MCB2430
MCB2432
MCB2434
MCB2436
MCB2438
MCB2440
MCB2444
MCB2452
MCB2456
MCB2460
MCB2464
MCB2472
47647
47648
33112
33120
33124
33126
33128
33130
47649
47650
33132
33134
33136
33138
33140
33142
33144
33148
33152
33154
33156
47652
33160
33162
33164
33166
33168
47653
47654
33178
33180
33182
33184
33186
33190
33194
33196
33198
33200
33202
F
B
A
STANDARD TOLERANCES
Dimensions
1/2 – 4
A
4-1/4 – 8
1–4
B
4-1/4 – 9
Tolerance
– 1/16
– 1/8
+ 1/16
+ 1/8
All bars are 13" long.
Contact factory for bars longer than 13". Available in lengths up to 105".
P-1930-BG
04/10
Boston Gear 800-825-6544
151
BEAR-N-BRONZE 660 Cast Bronze Bearings
Cored Bars
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
F
1-5/8
1-3/4
B
A
1-7/8
2
STANDARD TOLERANCES
Dimensions
1/2 – 4
A
4-1/4 – 8
1–4
B
4-1/4 – 9
Tolerance
– 1/16
– 1/8
+ 1/16
+ 1/8
2-1/8
2-1/4
B
2
2-1/8
2-1/4
2-3/8
2
2-1/8
2-1/4
2-3/8
2-1/2
2-5/8
2-3/4
3
3-1/4
3-1/2
4
4-1/4
2-1/4
2-3/8
2-1/2
2-5/8
3-1/4
2-1/4
2-1/2
2-5/8
2-3/4
3
3-1/4
3-1/2
3-3/4
4
4-1/2
5
6
2-5/8
2-7/8
2-3/4
3-1/4
3-1/2
3-3/4
4
4-1/4
Aprx.
Wgt.
(Lbs.)
4-7/8
7
9
10-1/2
3-3/8
5-1/8
7-1/2
9
11
13-1/2
15-1/2
20
25
31
42-1/2
50
5-1/2
7-1/2
9-3/4
12
23
3-7/8
8-1/2
10
12-1/4
16-1/2
22
29
34
39-1/2
54
69
105-1/2
8-1/2
13
9
19
25
30-1/2
37
43
Catalog
Number
Item
Code
MCB2632
MCB2634
MCB2636
MCB2638
MCB2832
MCB2834
MCB2836
MCB2838
MCB2840
MCB2842
MCB2844
MCB2848
MCB2852
MCB2856
MCB2864
MCB2868
MCB3036
MCB3038
MCB3040
MCB3042
MBC3052
MCB3236
MCB3240
MCB3242
MCB3244
MCB3248
MBC3252
MCB3256
MCB3260
MCB3264
MCB3272
MCB3280
MCB3296
MCB3442
MCB3446
MCB3644
MBC3652
MCB3656
MCB3660
MCB3664
MCB3668
47655
33204
33206
33208
47656
47657
33218
33220
33222
33224
33226
33230
33232
33234
33238
33240
47658
33242
33244
33246
33254
47659
33256
33258
33260
33264
33266
33268
33270
33272
33274
33276
33278
33280
33284
33294
33302
33304
33306
33308
33310
A
2-3/8
2-1/2
2-3/4
2-7/8
3
3-1/4
3-1/2
3-3/4
B
3
4
3
3-1/8
3-1/4
3-1/2
3-3/4
4
4-1/4
4-1/2
5
5-1/2
3-1/2
3-3/4
4
4-1/4
4-1/2
4
3-1/2
3-3/4
4
4-1/4
4-1/2
4-3/4
5
5-1/2
6
6-1/2
4
4-1/4
4-1/2
4-3/4
5
4-1/4
4-1/2
4-3/4
5
5-1/2
6
6-1/2
4-1/2
4-3/4
5
6
Aprx.
Wgt.
(Lbs.)
12
35
9-7/8
13
15
21
27
33-1/2
40
46
61
78
19-1/2
22-1/2
28-1/2
35
42
26-3/4
11-1/2
18-1/4
24-1/2
31
38
45
52
70
89-1/2
110
19-1/2
25-1/2
34
41
48
20-7/8
30
35-1/2
44
61
79
107-1/2
22-1/4
29
38
74
Catalog
Number
Item
Code
MCB3848
MCB3864
MCB4048
MCB4050
MCB4052
MCB4056
MCB4060
MCB4064
MCB4068
MCB4072
MCB4080
MCB4088
MCB4456
MCB4460
MCB4464
MCB4468
MCB4472
MCB4664
MCB4856
MCB4860
MCB4864
MCB4868
MCB4872
MCB4876
MCB4880
MCB4888
MCB4896
MCB48104
MCB5264
MCB5268
MCB5272
MCB5276
MCB5280
MCB5668
MCB5672
MCB5676
MCB5680
MCB5688
MCB5696
MCB56104
MCB6072
MCB6076
MCB6080
MCB6096
33314
33322
47661
33324
33326
33328
33330
33332
33334
33336
33340
33342
47662
33354
33356
33358
33360
33364
47663
33366
33368
33370
33372
33374
33376
33378
33380
33382
47664
33384
33386
33388
33390
47665
33394
33396
33398
33400
33402
47666
47667
33404
33406
33410
All bars are 13" long.
Contact factory for bars longer than 13".
152
Boston Gear 800-825-6544
P-1930-BG
04/10
BEAR-N-BRONZE 660 Cast Bronze Bearings
Cored Bars
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
4
4-1/4
4-1/2
4-3/4
5
B
4-3/4
5
5-1/2
6
6-1/2
7
7-1/2
5-1/2
6
6-1/2
5-1/2
6
6-1/2
7
6
6
7
7-1/2
8
Aprx.
Wgt. Catalog
(Lb.) Number
Item
Code
22-3/4
32-1/4
49
67-1/2
87
109
134
41-1/4
61
82
36
56-1/2
75
97
67
39
81
104
130
47668
47669
33412
33414
33416
33510
33512
47670
33418
33514
47671
47672
33420
33422
47673
33428
33430
33516
33518
MCB6476
MCB6480
MCB6488
MCB6496
MCB64104
MCB64112
MCB64120
MCB6888
MCB6896
MCB68104
MCB7288
MCB7296
MCB72104
MCB72112
MCB7696
MCB8096
MCB80112
MCB80120
MCB80128
Aprx.
A
5-1/4
5-1/2
5-3/4
6
6-1/2
8
B
7
7-1/2
6-1/2
7
7-1/2
8
7-1/2
7
7-1/2
8
9
7-1/2
8
9
9
Wgt. Catalog
(Lb.) Number
Item
Code
77
97
43
67-1/4
91
113
79
46-1/2
72-1/2
94
151
50-1/4
84
130
61
47675
33432
47676
47677
33434
33436
33438
47678
47679
33440
33522
47681
47682
33442
47684
MCB84112
MCB84120
MCB88104
MCB88112
MCB88120
MCB88128
MCB92120
MCB96112
MCB96120
MCB96128
MCB96144
MCB104120
MCB104128
MCB104144
MCB128144
F
B
A
STANDARD TOLERANCES
All bars are 13" long.
Contact factory for bars longer than 13".
Dimensions
1/2 – 4
4-1/4 – 8
1–4
B
4-1/4 – 9
A
Tolerance
– 1/16
– 1/8
+ 1/16
+ 1/8
Solid Bars
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
B
Aprx.
Wgt.
(Lb.)
Catalog
Number
Item
Code
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
1-7/8
2
2-1/4
2-1/2
2-5/8
2-3/4
1
1-1/2
2
2-3/4
3-1/2
4-1/2
5-1/2
6-1/2
7-1/2
8-1/2
10-1/4
11-1/2
14
17
21-1/2
23-1/2
25-1/2
MS8
MS10
MS12
MS14
MS16
MS18
MS20
MS22
MS24
MS26
MS28
MS30
MS32
MS36
MS40
MS42
MS44
33444
33446
33448
33450
33452
33454
33456
33458
33460
33462
33464
33466
33468
33472
33476
33478
33480
All Bars are 13" long.
Contact Factory for Bars longer than 13".
B
Aprx.
Wgt.
(Lb.)
Catalog
Number
Item
Code
3
3-1/4
3-1/2
4
4-1/4
4-1/2
4-3/4
5
5-1/2
6
6-1/2
7
7-1/2
8
9
30
35-1/2
41
53
59
67
73
82
98
118
139
161
186
210-1/2
273
MS48
MS52
MS56
MS64
MS68
MS72
MS76
MS80
MS88
MS96
MS104
MS112
MS120
MS128
MS144
33484
33486
33488
33492
33494
33496
33536
33498
33500
33502
33538
33504
33506
33508
33544
B
STANDARD TOLERANCES
Dimensions
1/2 – 4
B
4-1/4 – 9
P-1930-BG
04/10
Tolerance
+ 1/16 approx.
+ 1/8 approx.
Boston Gear 800-825-6544
153
Bronze Bearing Emergency Banks
SAVES MONEY — Reduce time lost when breakdowns occur due to bearing
failures. You own stock — any time — day or night.
COMPACT — Handy metal kit keeps bearings together in conveniently labeled
compartments. Bearings where you want them — when you need them.
F
REFILLS AVAILABLE — Both kit and replacement bearings are available from
stock.
See your Boston Gear Distributors, in all major cities — from coast to coast.
Actual Size of Bank 10-1/2 x 13-1/2"
BOST-BRONZ Emergency Bank
Order by Catalog Number-34500 BBB-1
There are two each of the 47 bearing sizes below in the bank.
B46-8
B47-8
B48-8
B56-8
B58-8
B68-10
B69-10
B610-10
B79-10
B710-10
B711-12
B810-12
B812-16
B813-12
B814-12
B912-12
1/4 x 3/8 x 1
1/4 x 7/16 x 1
1/4 x 1/2 x 1
5/16 x 3/8 x 1
5/16 x 1/2 x 1
3/8 x 1/2 x 1-1/4
3/8 x 9/16 x 1-1/4
3/8 x 5/8 x 1-1/4
7/16 x 9/16 x 1-1/4
7/16 x 5/8 x 1-1/4
7/16 x 11/16 x 1-1/2
1/2 x 5/8 x 1-1/2
1/2 x 3/4 x 2
1/2 x 13/16 x 1-1/2
1/2 x 7/8 x 1-1/2
9/16 x 3/4 x 1-1/2
B913-12
B1012-12
B1013-16
B1014-16
B1016-16
B1114-16
B1214-12
B1215-16
B1216-20
B1218-16
B1316-16
B1416-12
B1418-20
B1420-16
B1519-16
B1520-16
9/16 x 13/16 x 1-1/2
5/8 x 3/4 x 1-1/2
5/8 x 13/16 x 2
5/8 x 7/8 x 2
5/8 x 1 x 2
11/16 x 7/8 x 2
3/4 x 7/8 x 1-1/2
3/4 x 15/16 x 2
3/4 x 1 x 2-1/2
3/4 x 1-1/8 x 2
13/16 x 1 x 2
7/8 x 1 x 1-1/2
7/8 x 1-1/8 x 2-1/2
7/8 x 1-1/4 x 2
15/16 x 1-3/16 x 2
15/16 x 1-1/4 x 3
B1618-16
B1620-20
B1622-24
B1624-16
B1721-20
B1822-24
B1824-16
B1923-24
B1924-24
B2024-24
B2026-16
B2126-24
B2228-16
B2328-24
B2430-16
1 x 1-1/8 x 2
1 x 1-1/4 x 3
1 x 1-3/8 x 3
1 x 1-1/2 x 2
1-1/16 x 1-5/16 x 2-1/2
1-1/8 x 1-3/8 x 3
1-1/8 x 1-1/2 x 2
1-3/16 x 1-7/16 x 3
1-3/16 x 1-1/2 x 3
1-1/4 x 1-1/2 x 3
1-1/4 x 1-5/8 x 2
1-5/16 x 1-5/8 x 3
1-3/8 x 1-3/4 x 2
1-7/16 x 1-3/4 x 3
1-1/2 x 1-7/8 x 2
BEAR-N-BRONZ Emergency Bearing Bank
Order by Item Code
Bank #1 Item Code – 31300
Bank #2 Item Code – 31304
Bank #1
There are two each of the 30 bearing sizes below in the bank.
M46-10
M58-10
M69-10
M710-10
M812-12
M816-16
M912-12
M1014-12
M1115-12
M1216-12
M1316-12
M1420-14
M1520-20
M1620-16
M1624-16
M1723-20
154
1/4 x 3/8 x 1-1/4
5/16 x 1/2 x 1-1/4
3/8 x 9/16 x 1-1/4
7/16 x 5/8 x 1-1/4
1/2 x 3/4 x 1-1/2
1/2 x 1 x 2
9/16 x 3/4 x 1-1/2
5/8 x 7/8 x 1-1/2
11/16 x 15/16 x 1-1/2
3/4 x 1 x 1-1/2
13/16 x 1 x 1-1/2
7/8 x 1-1/4 x 1-3/4
15/16 x 1-1/4 x 2-1/2
1 x 1-1/4 x 2
1 x 1-1/2 x 2
1-1/16 x 1-7/16 x 2-1/2
Boston Gear 800-825-6544
M1824-16
M1923-16
M1926-16
M2026-20
M2228-18
M2230-24
M2328-24
M2330-32
M2428-18
M2430-20
M2432-28
M2630-30
M2632-24
M2832-32
1-1/8 x 1-1/2 x 2
1-3/16 x 1-7/16 x 2
1-3/16 x 1-5/8 x 2
1-1/4 x 1-5/8 x 2-1/2
1-3/8 x 1-3/4 x 2-1/4
1-3/8 x 1-7/8 x 3
1-7/16 x 1-3/4 x 3
1-7/16 x 1-7/8 x 4
1-1/2 x 1-3/4 x 2-1/4
1-1/2 x 1-7/8 x 2-1/2
1-1/2 x 2 x 3-1/2
1-5/8 x 1-7/8 x 3-3/4
1-5/8 x 2 x 2
1-3/4 x 2 x 4
Bank #2
There are two each of the 20
bearing sizes below in the bank.
M1219-12
M1318-12
M1419-8
M1420-12
M1620-16
M1624-16
M1824-16
M1923-16
M2028-16
M2126-16
M2228-16
M2330-24
M2428-18
M2430-20
M2432-20
M2630-18
M2632-24
M2832-24
M3238-32
M3644-32
3/4 x 1-3/16 x 1-1/2
13/16 x 1-1/8 x 1-1/2
7/8 x 1-3/16 x 1
7/8 x 1-1/4 x 1-1/2
1 x 1-1/4 x 2
1 x 1-1/2 x 2
1-1/8 x 1-1/2 x 2
1-3/16 x 1-7/16 x 2
1-1/4 x 1-3/4 x 2
1-5/16 x 1-5/8 x 2
1-3/8 x 1-3/4 x 2
1-7/16 x 1-7/8 x 3
1-1/2 x 1-3/4 x 2-1/4
1-1/2 x 1-7/8 x 2-1/2
1-1/2 x 2 x 2-1/2
1-5/8 x 1-7/8 x 2-1/4
1-5/8 x 2 x 3
1-3/4 x 2 x 3
2 x 2-3/8 x 4
2-1/4 x 2-3/4 x 4
P-1930-BG
04/10
BOStonE F-1 Glass Filled Teflon Bearings
F
BOStonE F-1 glass filled material is completely self-lubricating
with outstanding wear and corrosion resistance properties,
machined from extruded rods to close tolerances. BOStonE F-1
material has a wide temperature capability and an excellent PV
value. BOStonE F-1 bearings are green in color.
Selection
Lubrication of these bearings is not required. Teflon®, the major
ingredient of BOStonE F-1 material (75%), has excellent selflubricating characteristics and a low coefficient of friction. The
remaining 25% is glass.
A general guide to determination of limiting load and velocity
values for sleeve bearings has been established by the use of PV
calculations. PV represents Pressure x Velocity, for example 100
psi x 20 fpm yields a PV of 2000.
BOStonE F-1 bearing material has excellent strength and
wearability and was developed to withstand high loads at
moderate speeds. The allowable operating temperature range is
–400° to +550°F.
Maximum PV value for BOStonE F-1 bearings: 20,000 (50,000
for intermittent service).
In general, sleeve bearings should be selected with a length of
one to two times the shaft diameter and an O.D. approximately
25% larger than the shaft diameter.
For complete selection and application information, see
Engineering Section, Pages 174-182.
Typical applications for BOStonE F-1 bearings are textile
machinery, farm implements, food processing equipment, pulp
and paper machinery, business machinery, aircraft, home
appliances, automotive and machine tools as well as many
others, in both the electrical and chemical fields.
Cylindrical, Flanged and Thrust Bearings and Solid Bars are
stocked in BOStonE F-1 material.
P-1930-BG
04/10
Boston Gear 800-825-6544
155
BOStonE F-1 Glass Filled Teflon Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
F
B
A
Item
Code
56819
56820
56821
56822
56823
56824
56825
56826
56827
56828
56829
56830
56831
56832
56833
56834
56835
56836
56837
56841
56842
56843
3/4 P1115-6
56844
B
C
1/8
.129
1/4
.251
3/16
.191
5/16
.313
1/4
.254
3/8
.376
5/16
.316
3/8
.379
1/2
.501
9/16
.563
7/16
.441
5/8
.626
1/2
.504
3/4
.751
5/8
7/8
.876
1/4
3/8
1/4
3/8
1/2
1/4
3/8
1/2
3/8
1/2
3/8
1/2
3/4
3/8
1/2
3/4
1/2
3/4
1
5/8
3/4
1
.630
11/16 15/16
.693 .938
C
Catalog
Number
P24-2
P24-3
P35-2
P35-3
P35-4
P46-2
P46-3
P46-4
P58-3
P58-4
P69-3
P69-4
P69-6
P710-3
P710-4
P710-6
P812-4
P812-6
P812-8
P1014-5
P1014-6
P1014-8
A
A
B
3/4
.755
1
1.001
7/8
.880
1-1/8
1.126
1
1-1/4
1.005 1.251
1-1/8 1-3/8
1.130 1.376
1-1/4 1-1/2
1.255 1.501
On A and B dimensions, tolerances apply
to actual (decimal) dimensions
Catalog
C Number
1/2 P1216-4
3/4 P1216-6
1 P1216-8
3/4 P1418-6
1 P1418-8
3/4 P1620-6
1 P1620-8
1-1/2 P1620-12
3/4 P1822-6
1 P1822-8
1-1/2 P1822-12
3/4 P2024-6
1 P2024-8
1-1/2 P2024-12
1 P2226-8
1-1/2 P2226-12
1 P2428-8
1-1/2 P2428-12
2 P2428-16
Item
Code
56845
56846
56847
56848
56849
56850
56851
56852
56853
56854
56855
56856
56857
56858
56859
56860
56861
56862
56863
1-3/8
1.380
1-1/2
1.506
1-5/8
1.626
1-3/4
1.751
1-5/8
1.631
1-3/4
1.756
1-7/8
1.881
2
2.006
1-7/8 1-3/4 P2630-14 56864
1.876
2
1-3/4 P2832-14 56865
2.001
2-1/8
2 P3034-16 56866
2.126
2-1/4
2 P3236-16 56867
2.251
STANDARD TOLERANCES
Dimensions
A
B
C
STANDARD CONCENTRICITY
Tolerance
All
+.002 to –.000
All
±.005
Flanged Bearings
Dimensions
.129 – 1.005
A
1.130 – 2.006
T.I.R. (A to B)
.003
.004
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
D
E
3/16
.191
1/4
.254
3/8
.379
1/2
.504
5/16
.313
3/8
.376
5/8
.626
3/4
.751
.437
1/16
.500
1/16
.875
1/8
1.000
1/8
5/8
.630
3/4
.755
7/8
.876
1
1.001
1/4
1/2
3/8
1/2
1/2
3/4
1/2
3/4
1
3/4
1
1.000
1/8
1.250
1/8
1
Catalog
Number
FP35-2
FP35-4
FP46-3
FP46-4
FP610-4
FP610-6
FP812-4
FP812-6
FP812-8
FP1014-6
FP1014-8
Item
Code
56868
56869
56870
56871
56872
56873
56874
56875
56876
56877
56878
FP1216-8
56879
On A and B dimensions, tolerances apply to actual (decimal) dimensions
D
B A
STANDARD TOLERANCES
Dimensions
E
C
156
Boston Gear 800-825-6544
A
B
C
D
E
STANDARD CONCENTRICITY
Tolerance
All
+.002 to –.000
All
All
All
±.005
±.005
±.003
A
Dimensions
All
T.I.R. (A to B)
.003
P-1930-BG
04/10
BOStonE F-1 Glass Filled Teflon Bearings
Thrust Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Catalog
Number
Item
Code
.060
TP410
56880
.060
TP612
56881
.060
TP816
56882
A
B
C
1/4
.254
3/8
.379
1/2
.504
5/8
.625
3/4
.750
1
1.000
F
On A and B dimensions, tolerances apply to actual (decimal) dimensions.
STANDARD TOLERANCES
A
C
E
Dimensions
All
All
All
Tolerance
+.005 to –.000
±.003
±.003
A
B
C
Solid Bars (Extruded)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
B
Approx. Weight
(In Lbs.)
1/4
3/8
1/2
3/4
1
1-1/4
1-1/2
2
.065
.135
.233
.504
.878
1.355
1.937
3.250
Catalog
Number
Item
Code
SP4
SP6
SP8
SP12
SP16
SP20
SP24
SP32
50958
50959
50960
50961
50962
50963
50964
50965
All Bars are 13" long.
Other Diameters and longer Lengths are available on special order.
STANDARD TOLERANCES
Dimensions
1/4 - 1/2
3/4 - 1
B
1-1/4
1-1/2 - 2
Tolerance
–.000 to +.015
–.000 to +.020
–.000 to +.030
–.000 to +.040
B
Other BOStonE F-1 SHAPES AVAILABLE ON SPECIAL ORDER
CORED BARS
P-1930-BG
04/10
CIRCULAR DISCS
TUBING
PLATES
Boston Gear 800-825-6544
157
RULON 641 Bearings
®
Boston Gear’s RULON 641 Bearings are designed to overcome the chronic problems that plague bearings used in food
and pharmaceutical applications.
Features
F
• FDA cleared, USDA accepted non-toxic materials
• RULON 641 compound of virgin PTFE and fillers designed to
meet poultry and meat industry specs
• FDA drug master file numbered to allow for incidental
contact with body fluids
• Excellent load and wear characteristics for continuous nonlubricated service
• Compatible with food and drug industries standard stainless
steels 303 and 316 as well as 1018 mild steel
• Designed for performance at extremely high temperatures.
PV value of 10,000 with 316 stainless steel
• Capable of speeds up to 400 ft/minute under dry, low-load
operation
• Stick-slip is virtually nonexistent due to low friction at startup
and slow speeds. Ideal for oscillating or start/stop
applications
• Corrosion resistant, unaffected by all common acids, bases,
and solvents
• Shatter proof design to eliminate sudden breakdowns
Why RULON 641 for Food and Pharmaceutical
Applications
• White natural color and lower friction than when using
carbon bearings
• No metallic debris to drop into a process such as when
using bronze bearings
• No leaky lubricants or lubricants damaged by high or low
temperatures or cleaning solutions such as when using
bronze bearings
• RULON 641 has a wider temperature tolerance and better
load carrying capabilities than UHMWPE materials
• RULON 641 has better wear properties and better high
temperature load carrying capabilities than virgin PTFE alone
• Reduced downtime
• No lubrication required
158
Boston Gear 800-825-6544
P-1930-BG
04/10
RULON 641 Bearings
Applications
RULON 641 bearings are perfect for use in machinery and equipment in the following areas:
•
•
•
•
•
•
Prepared meat products
Frozen foods
Cookies and crackers
Candy
Animal and marine fats and oils
Malt beverages
•
•
•
•
•
Medicinal chemicals
Pharmaceutical preparations
Soaps and detergents
Perfumes and cosmetics
Food-related packing and sealing
devices
• Food and drug conveyors
Recommended Operating Limits
– 400/+500
10,000
1,000
400
RB25
8 – 16
Mild Steel, 303
+316 Stainless Steel
SLEEVE BEARINGS
B
Recommended
–.000
Housing
+.002
Bore*
OD
1/4
.254
3/8
.379
1/2
.504
5/8
.630
3/4
.755
1
1.005
1-1/4
1.255
1-1/2
1.506
3/8
.376
9/16
.563
3/4
.751
7/8
.876
1
1.001
1-1/4
1.251
1-1/2
1.501
1-3/4
1.751
F
RULON 641
Friction—Static & Dynamic
Water Absorption ASTM D570
Flammability
ASTM D635
Chemical Resistance
Thermal Conductivity BTU/hr/sq. ft/°F/in.
Linear Coefficient of 78°F–200°F
Thermal Expansion
(-78°F)–(350°F)
Note: B = Bearing Diameter
A
–.000
+.002
ID
Coffee
Food preparations
Biological products
Food process machinery
Vending machines
Household cooking
equipment and appliances
Engineering Information
RULON 641
Temperature — Typical Range °F
Maximum PV (continuous)
Maximum P — PSI (static)
Maximum V — SFM (no load)
Shaft Hardness — Minimum
Shaft Finish Recommended RMS
•
•
•
•
•
•
.10–.30
0%
Non-Flammable
Inert
2.60
B
3.9 x 10-5
C
4.9 x 10-5
B
4.2 x 10-5
C
5.7 x 10-5
C = Bearing Length
FLANGED BEARINGS
Recommended
C
Catalog
Shaft
±.005 Number
Size
Item
Code
.375/.374
.2500/.2490
.250
.375
RP46-2
RP46-3
56790
56791
.562/.561
.3750/.3740
.375
RP69-3
56792
.750/.749
.5000/.4990
.500
RP812-4
56793
.875/.874
.6250/.6240
1.000/.999
.7500/.7490
1.250/1.249
1.000/.9990
RP1014-5
RP1014-8
.750 RP1216-6
1.500 RP1216-12
1.000 RP1620-8
1.500 RP1620-12
56794
56795
56796
56797
56798
56799
1.500/1.499
1.250/1.249
2.000 RP2024-16
56800
1.750/1.749
1.500/1.499
2.000 RP2428-16
56801
.625
A
B Recommended Recommended C
Flange
–.000 –.000 Housing
Shaft
Lgth.
D
E Catalog
+.002 +.002
Bore*
Size
±.005 ±.005 ±.003 Number
1/4 3/8
.254 .376
3/8 5/8
.379 .626
1/2 3/4
.504 .751
5/8 7/8
.630 .876
3/4
1
.755 1.001
Item
Code
.375/.374
.2500/.2490 .500
.500 .062 RFP46-4
56802
.625/.624
.3750/.3740 .500
.875 .125 RFP610-4 56803
.750/.749
.5000/.4990 1.000 1.000 .125 RFP812-8 56804
.875/.874
.6250/.6240 1.000 1.000 .125 RFP1014-8 56805
1.000/.999 .7500/.7490 1.000 1.250 .125 RFP1216-8 56817
D
B A
E
C
B
SOLID BARS
A
B
Standard
(Dia.) Tolerances
C
Other Shapes
Available On
Special Order
PLATES
*Press fit. .004/.001
P-1930-BG
04/10
CORED BARS
1/2 –.000-/+.015
.504
3/4 –.000/+.015
.755
1 –.000/+.020
1.005
Approx. Catalog Item
Wt.Lbs. Number Code
.233
RSP-8
56786
.503
RSP-12
56787
.878
RSP-16
56788
B
All Bars are 13" long
Other Diameters and longer lengths are available
on special order.
Note: On A and B dimensions, tolerances apply to actual (decimal) dimensions.
Boston Gear 800-825-6544
159
BOStonE Molded Plastic Bearings
F
Boston stocks Cylindrical, Flanged and Roll End Bearings in five
materials —
1. Nylon (N) exhibits good chemical and corrosion resistance.
Excellent abrasion resistance and low surface friction provide
long wear without lubrication. These nylon bearings are black.
Good up to 225ºF maximum.
2. Delrin® and Celcon® (D) are trademarks for equivalent Acetal
Resins produced by Du Pont and Celanese respectively.
Acetals possess excellent moisture resistance characteristics.
These materials are white. Good up to 225ºF maximum.
3. Nylatron® GS (GS) is a trademark for molybdenum disulfide
filled nylon produced by the Polymer Corp. Nylatron® GS
exhibits excellent abrasion resistance. Nylatron® GS is dark
gray in color. Good up to 225ºF maximum.
Size variation is easily accomplished by rebore or remachine
operations, simply state size desired. Bores can be reduced with
bushing inserts. Adaptors are available for hex shafts.
(AF) Roll End Bearings, 3" and up, are Delrin or Celcon with a
Teflon filled Acetal bushing. This combination provides a low cost
unit with the superior properties of a Teflon filled bearing.
However, one piece Teflon filled Acetal bearings can be offered
upon request.
For bearings not shown — write for prices stating quantity
desired.
Blind Bore Bearings
4. Teflon filled Acetal (AF) — Teflon.® This material has excellent
abrasion and corrosion resistance and high lubricity against
steel. Good up to 225ºF maximum.
Blind Bore Bearings are available on special order. Minimum
quantities will apply. They are available for roll end bearing sizes
818 through 2216 and 8P40 through 20P40. Depth of blind
bores is 1/8" less than total bearing length. When ordering, add
“B” to Catalog Number.
5. Teflon filled Nylon (TN) used for Hanger Bearings only, is light
gray in color.
Selection
Roll End Bearings
These bearings are available in almost every conceivable size
directly from stock — no costly waiting, tooling or set-up
charges.
Sizes are interchangeable with existing wood and ball bearings.
Several objectives can be met with Roll End Bearings made of
our selected plastic resins.
A general guide to determination of limiting load and velocity
values for sleeve bearings has been established by the use of PV
calculations. PV represents Pressure x Velocity, for example: 100
psi x 20 fpm yields a PV of 2000.
Maximum PV values for BostonE Molded Plastic Bearings are:
Nylon (N) — 3,000
Delrin or Celcon (D) — 3,000
1.
No lubricant required
Nylatron GS (GS) — 4,000
2.
Clean — Neat appearance
Teflon filled Acetal (AF) — 8,000
3.
Non-contamination
Teflon filled nylon (TN) — 10,000
4.
Resistant to moisture & chemicals
5.
Quiet operation
6.
Excellent load & wear ratings
Roll End Bearings have ribbed construction to allow closer
dimensional control, to help dissipate heat and to reduce cost.
These designs help prevent distortion or seizure of bearing bore,
normally caused by high press fits, temperature change and
moisture absorption.
160
Boston Gear 800-825-6544
For complete selection and application information, see
Engineering Section, Pages 174-181.
Teflon® is a registered trademark of Dupont.
P-1930-BG
04/10
BOStonE Molded Plastic Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A*
B*
C
1/4
5/16
3/8
1/2
1/2
1/2
1/2
5/8
7/8
7/8
7/8
1
5/8
3/4
3/4
5/8
3/4
1-1/2
3/4
1
1-1/2
7/8
1
1
1-1/8
1-1/4
1-1/4
1-1/4
2
1-1/2
Catalog
Number
Item†
Code
GS48-7
GS58-7
GS68-7
AF810-8
GS1012-6
AF1012-6
GS1012-12
AF1012-12
GS1216-12
AF1216-12
D1418-10
GS1620-16
AF1620-12
57551
57552
57553
57555
57557
57558
57559
57560
57561
57562
57565
-
F
B
A
†Any item listed WITHOUT an item Code Number is available on a
SPECIAL ORDER BASIS and minimun quantities may apply.
C
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
Flanged Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A*
B*
C
D
E
3/8
5/8
3/4
1
1-1/2
7/8
1
1/16
1/16
7/16
3/4
1-1/2
1
1/16
5/8
1
7/8
1/16
1
1/16
1
1/16
1
1/16
1/2
3/4
9/16
3/4
5/8
3/4
3/4
1
1
1-1/4
1-1/2
2
1-1/2
2
1-1/2
2
1-1/2
1-1/2 1-1/4
2
1-1/2 1-3/4 1-1/2
1/8
1-1/2
1/8
2
1/8
Catalog
Number
Item
Code
FGS610-8
FAF610-8
FAF612-12
FAF712-12
FGS810-8
FAF810-8
FAF812-12
FGS812-16
FAF912-12
FGS912-16
FGS1012-12
FGS1012-16
FAF1012-12
FGS1216-12
FAF1216-12
FGS1620-16
FAF1620-16
FAF2428-12
57577
57578
57585
57586
57579
57580
57587
57582
57588
57583
57589
57584
57590
57591
57592
57593
57594
57606
*Approx. dimensions. Actual size related to molding variations,
however, wall thickness will be quite uniform making it practical to use
these bearings for many applications.
D
B A
E
C
Material
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
P-1930-BG
04/10
Boston Gear 800-825-6544
161
BOStonE Molded Plastic Bearings
Roll End Bearings for Steel Tubing
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE †
B
(Tube Size)
A*
C
D
E
1/8
F
3/4
22 ga.
3/16
.750 O.D.
.694 I.D.
7/8
20 ga.
1/4
.875 O.D.
.805 I.D.
9/16 5/32 3/32
3/16
1/4
3/8
9/16 5/32 3/32
1/4
1
18 ga.
3/8
1.000 O.D.
.902 I.D.
1/2
C
9/16 3/16
1/8
5/8
3/16
1/8
3/4
1/4
1/8
7/8
5/16 3/16
1
5/16 3/16
1/4
D
B
A
E
1-1/4
16 ga.
3/8
1.250 O.D.
1.120 I.D.
1/2
PRESS
FIT INTO
ROLL SIZE
1/4
5/16
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
1-3/8
18 ga.
3/8
1.375 O.D.
1.277 I.D.
1/2
1/4
1-1/2
16 ga.
3/8
1/2
1.500 O.D.
1.370 I.D.
5/8
1/4
*These dimensions are approximately 1/64" larger than listed.
†Any item listed WITHOUT an Item Code Number is available on a SPECIAL
ORDER BASIS and minimum quantities may apply.
3/8
1-1/2
EMT
1/2
BLIND BORE Bearings are available on special order — minimum quantities will
apply.
1.740 O.D.
1.610 I.D.
162
Boston Gear 800-825-6544
5/8
Catalog
Number
622D-1/8
622GS-1/8
622AF-1/8
622D-3/16
622GS-3/16
622AF-3/16
622D-1/4
622GS-1/4
622AF-1/4
720D-3/16
720AF-3/16
720AF-1/4
720D-3/8
720AF-3/8
818D-1/4
818GS-1/4
818AF-1/4
818GS-3/8
818AF-3/8
818D-1/2
818GS-1/2
818AF-1/2
1016D-1/4
1016GS-1/4
1016AF-1/4
1016D-3/8
1016GS-3/8
1016AF-3/8
1016D-1/2
1016GS/1/2
1016AF-1/2
1118D-1/4
1118GS-1/4
1118AF-1/4
1118D-5/16
1118GS-5/16
1118AF-5/16
1118D-3/8
1118GS-3/8
1118AF-3/8
1118D-1/2
1118GS-1/2
1118AF-1/2
1216D-1/4
1216GS-1/4
1216AF-1/4
1216D-3/8
1216GS-3/8
1216AF-3/8
1216GS-1/2
1216AF-1/2
1216D-5/8
1216GS-5/8
1216AF-5/8
12EMD-1/4
12EMGS-1/4
12EMAF-1/4
12EMD-3/8
12EMGS-3/8
12EMAF-3/8
12EMD-1/2
12EMGS-1/2
12EMAF-1/2
12EMD-5/8
12EMGS-5/8
12EMAF-5/8
Item †
Code
56920
56923
56926
56921
56924
56927
56922
56925
56928
56929
—
—
56931
—
56938
56941
56944
56942
56945
56940
56943
56946
56947
56950
56953
56948
56951
56954
56949
56952
56955
56956
56960
—
56957
56961
—
56958
56962
—
56959
56963
—
56968
56972
56976
56969
56973
56977
56974
56978
56971
56975
56979
—
—
—
56981
—
—
56982
56986
—
56983
56987
—
P-1930-BG
04/10
BOStonE Molded Plastic Bearings
Roll End Bearings for Steel Tubing
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE †
B
(Tube Size)
A*
C
D
E
1
5/16
3/16
1
5/16
3/16
1/4
3/8
1-5/8
16 ga.
1/2
1.625 O.D.
1.495 I.D.
5/8
1/4
3/8
1-3/4
16 ga.
1/2
5/8
1.750 O.D.
1.620 I.D.
3/4
1/4
3/8
1-7/8
16 ga.
1/2
1
5/16
3/16
5/8
1.875 O.D.
1.745 I.D.
3/4
1/4
3/8
2
18 ga.
1/2
1
5/16
3/16
5/8
2.000 O.D.
1.902 I.D.
3/4
1/4
3/8
2
16 ga.
1/2
5/8
2.000 O.D.
1.8701 I.D.
P-1930-BG
04/10
3/4
1
5/16
3/16
Catalog
Number
1316D-1/4
1316GS-1/4
1316AF-1/4
1316D-3/8
1316GS-3/8
1316AF-3/8
1316D-1/2
1316GS-1/2
1316AF-1/2
1316D-5/8
1316GS-5/8
1316AF-5/8
1416D-1/4
1416GS-1/4
1416AF-1/4
1416D-3/8
1416GS-3/8
1416AF-3/8
1416D-1/2
1416GS-1/2
1416AF-1/2
1416D-5/8
1416GS-5/8
1416AF-5/8
1416D-3/4
1416GS-3/4
1416AF-3/4
1516D-1/4
1516GS-1/4
1516AF-1/4
1516D-3/8
1516GS-3/8
1516AF-3/8
1516D-1/2
1516GS-1/2
1516AF-1/2
1516D-5/8
1516GS-5/8
1516AF-5/8
1516D-3/4
1516GS-3/4
1516AF-3/4
1618D-1/4
1618GS-1/4
1618AF-1/4
1618D-3/8
1618GS-3/8
1618AF-3/8
1618D-1/2
1618GS-1/2
1618AF-1/2
1618D-5/8
1618GS-5/8
1618AF-5/8
1618D-3/4
1618GS-3/4
1618AF-3/4
1616D-1/4
1616GS-1/4
1616AF-1/4
1616D-3/8
1616GS-3/8
1616AF-3/8
1616D-1/2
1616GS-1/2
1616AF-1/2
1616D-5/8
1616GS-5/8
1616AF-5/8
1616D-3/4
1616GS-3/4
1616AF-3/4
Item †
Code
—
56996
—
56993
56997
—
56994
56998
—
56995
56999
—
57070
57075
—
57071
57076
—
57072
57077
—
57073
57078
57083
57074
57079
57084
57085
57090
—
57086
57091
—
57087
57092
—
57088
57093
—
—
57094
—
57872
57877
—
—
—
—
57874
57879
—
57875
57880
—
57876
57881
—
57100
57105
—
57101
57106
—
57102
57107
57112
57103
57108
—
57104
—
—
F
C
D
B
A
E
PRESS
FIT INTO
ROLL SIZE
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
*These dimensions are approximately 1/64" larger than listed.
†Any item listed WITHOUT an Item Code Number is available on a SPECIAL
ORDER BASIS and minimum quantities may apply.
BLIND BORE Bearings are available on special order — minimum quantities will
apply.
Boston Gear 800-825-6544
163
BOStonE Molded Plastic Bearings
Roll End Bearings for Steel Tubing
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE †
B
(Tube Size)
A*
C
D
E
1/4
F
3/8
2
EMT
1/2
1
5/16
3/16
1
5/16
3/16
1
5/16
3/16
1
5/16
3/16
1
5/16
3/16
5/8
2.190 O.D.
2.067 I.D.
3/4
1/4
3/8
2-1/4
18 ga.
1/2
C
5/8
D
B
2.250 O.D.
2.152 I.D.
A
3/4
1/4
E
PRESS
FIT INTO
ROLL SIZE
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
3/8
2-1/4
16 ga.
1/2
5/8
2.250 O.D.
2.120 I.D.
3/4
1/4
3/8
2-1/2
18 ga.
1/2
5/8
2.500 O.D.
2.402 I.D.
3/4
*These dimensions are approximately 1/64" larger than listed.
1/4
†Any item listed WITHOUT an Item Code Number is available on a SPECIAL
ORDER BASIS and minimum quantities may apply.
3/8
BLIND BORE Bearings are available on special order — minimum quantities will
apply.
2-1/2
16 ga.
1/2
5/8
2.500 O.D.
2.370 I.D.
164
Boston Gear 800-825-6544
3/4
Catalog
Number
Item †
Code
16EMD-1/4
16EMGS-1/4
16EMAF-1/4
16EMD-3/8
16EMGS-3/8
16EMAF-3/8
16EMD-1/2
16EMGS-1/2
16EMAF-1/2
16EMD-5/8
16EMGS-5/8
16EMAF-5/8
16EMD-3/4
16EMGS-3/4
16EMAF-3/4
1818D-1/4
1818GS-1/4
1818AF-1/4
1818D-3/8
1818GS-3/8
1818AF-3/8
1818D-1/2
1818GS-1/2
1818AF-1/2
1818D-5/8
1818GS-5/8
1818AF-5/8
1818D-3/4
1818GS-3/4
1818AF-3/4
1816D-1/4
1816GS-1/4
1816AF-1/4
1816D-3/8
1816GS-3/8
1816AF-3/8
1816D-1/2
1816GS-1/2
1816AF-1/2
1816D-5/8
1816GS-5/8
1816AF-5/8
1816D-3/4
1816GS-3/4
1816AF-3/4
2018D-1/4
2018GS-1/4
2018AF-1/4
2018D-3/8
2018GS-3/8
2018AF-3/8
2018D-1/2
2018GS-1/2
2018AF-1/2
2018D-5/8
2018GS-5/8
2018AF-5/8
2018D-3/4
2018GS-3/4
2018AF-3/4
2016D-1/4
2016GS-1/4
2016AF-1/4
2016D-3/8
2016GS-3/8
2016AF-3/8
2016D-1/2
2016GS-1/2
2016AF-1/2
2016D-5/8
2016GS-5/8
2016AF-5/8
2016D-3/4
2016GS-3/4
2016AF-3/4
—
—
—
—
—
—
57117
—
—
57118
—
—
57119
—
—
—
57862
—
—
—
—
—
—
—
—
—
—
—
—
—
57130
—
—
57131
57136
—
57132
57137
—
57133
—
—
57134
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
57145
—
—
—
—
—
57147
57152
—
57148
57153
—
57149
57154
—
P-1930-BG
04/10
BOStonE Molded Plastic Bearings
Roll End Bearings for Steel Tubing
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE †
B
(Tube Size)
A*
C
D
E
1/4
3/8
2-3/4
16 ga.
1/2
1
5/16
3/16
5/8
2.750 O.D.
2.620 I.D.
3
16 ga.
3.000 O.D.
2.870 I.D.
3
11 ga.
3.000 O.D.
2.760 I.D.
4
11 ga.
4.000 O.D.
3.760 I.D.
4-1/2
11 ga.
4.500 O.D.
4.260 I.D.
P-1930-BG
3/4
1-1/2
3/8 1-1/2
1-5/8
1-1/2
1/2 1-1/2
1-5/8
1-1/2
5/8 1-1/2
1-5/8
1-1/2
3/4 1-1/2
1-5/8
1-1/2
3/8 1-1/2
1-5/8
1-1/2
1/2 1-1/2
1-5/8
1-1/2
5/8 1-1/2
1-5/8
1-1/2
3/4 1-1/2
1-5/8
2
1/2
2
2-1/8
2
5/8
2
2-1/8
2
3/4
2
2-1/8
2
1
2
2-1/8
2
1-1/4 2
2-1/8
1-3/4
1/2 1-3/4
1-7/8
1-3/4
5/8 1-3/4
1-7/8
1-3/4
3/4 1-3/4
1-7/8
1 1-3/4
1-7/8
1-3/4
1-1/4 1-3/4
1-7/8
04/10
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
1/2
3/8
3/8
1/2
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
3/16
Catalog
Number
2216D-1/4
2216GS-1/4
2216AF-1/4
2216D-3/8
2216GS-3/8
2216AF-3/8
2216D-1/2
2216GS-1/2
2216AF-1/2
2216D-5/8
2216GS-5/8
2216AF-5/8
2216D-3/4
2216GS-3/4
2216AF-3/4
2416D-3/8
2416GS-3/8
2416AF-3/8
2416D-1/2
2416GS-1/2
2416AF-1/2
2416D-5/8
2416GS-5/8
2416AF-5/8
2416D-3/4
2416GS-3/4
2416AF-3/4
2411D-3/8
2411GS-3/8
2411AF-3/8
2411D-1/2
2411GS-1/2
2411AF-1/2
2411D-5/8
2411GS-5/8
2411AF-5/8
2411D-3/4
2411GS-3/4
2411AF-3/4
3211D-1/2
3211GS-1/2
3211AF-1/2
3211D-5/8
3211GS-5/8
3211AF-5/8
3211D-3/4
3211GS-3/4
3211AF-3/4
3211D-1
3211GS-1
3211AF-1
3211D-1-1/4
3211GS-1-1/4
3211AF-1-1/4
3611D-1/2
3611GS-1/2
3611AF-1/2
3611D-5/8
3611GS-5/8
3611AF-5/8
3611D-3/4
3611GS-3/4
3611AF-3/4
3611GS-1
3611AF-1
3611D-1-1/4
3611GS-1-1/4
3611AF-1-1/4
Item †
Code
57160
—
—
57161
—
—
57162
—
—
57163
—
—
—
—
—
57607
57611
57615
57608
57612
57616
57609
57613
57617
57610
57614
57618
57175
57179
57183
57176
57180
57184
57177
57181
57185
57178
57182
57186
57187
57192
57197
57188
57193
57198
57189
57194
57199
57190
57195
57200
57191
57196
—
—
—
—
—
—
—
—
—
—
—
—
—
—
F
C
D
B
A
E
PRESS
FIT INTO
ROLL SIZE
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
*These dimensions are approximately 1/64" larger than listed.
†Any item listed WITHOUT an Item Code Number is available on a SPECIAL
ORDER BASIS and minimum quantities may apply.
AF Bearings with 3" or larger O.D. will be supplied with an AF Flanged
bushing inserted into a D or GS Roll End Bearing. For these AF Bearings
it is recommended to reduce the shaft diameter or increase bushing I.D.
to obtain proper clearance.
BLIND BORE Bearings are available on special order.
Minimum quantities will apply.
Boston Gear 800-825-6544
165
BOStonE Molded Plastic Bearings
Roll End Bearings for Steel Tubing and Standard Pipe
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE †
B
(Pipe Size)
F
A*
C
1/4
1
Sch. 40
1.315 O.D.
1.049 I.D.
3/8
5/8
1/2
1/4
3/8
1
1-1/2
Sch. 40
1/2
C
D
B
1.900 O.D.
1.610 I.D.
A
5/8
1/4
E
PRESS
FIT INTO
ROLL SIZE
3/8
1
1-1/2
Sch. 80
1/2
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
1.900 O.D.
1.500 I.D.
5/8
1/4
3/8
2
Sch.40
1/2
5/8
*These dimensions are approximately 1/64" larger than listed.
†Any item listed WITHOUT an Item Code Number is available on a SPECIAL
ORDER BASIS and minimum quantities may apply.
2.375 O.D.
2.067 I.D.
3/4
1
Catalog
Number
8P40D-1/4
8P40GS-1/4
8P40AF-1/4
8P40D-3/8
3/16 1/8 8P40GS-3/8
8P40AF-3/8
8P40D-1/2
8P40GS-1/2
8P40AF-1/2
12P40D-1/4
12P40GS-1/4
12P40AF-1/4
12P40D-3/8
5/16 3/16 12P40GS-3/8
12P40AF-3/8
12P40D-1/2
12P40GS-1/2
12P40AF-1/2
12P40D-5/8
12P40GS-5/8
12P40AF-5/8
12P80D-1/4
12P80GS-1/4
12P80AF-1/4
12P80D-3/8
5/16 3/16 12P80GS-3/8
12P80AF-3/8
12P80D-1/2
12P80GS-1/2
12P80AF-1/2
12P80D-5/8
12P80GS-5/8
12P80AF-5/8
16P40D-1/4
16P40GS-1/4
16P40AF-1/4
16P40D-3/8
16P40GS-3/8
16P40AF-3/8
16P40D-1/2
5/16 3/16 16P40GS-1/2
16P40AF-1/2
16P40D-5/8
16P40GS-5/8
16P40AF-5/8
16P40D-3/4
16P40GS-3/4
16P40AF-3/4
D
E
Item †
Code
57334
57337
—
57335
57338
—
57336
57339
—
57343
57347
57351
57344
57348
57352
57345
57349
—
57346
57350
57354
—
—
—
—
—
—
57663
—
—
57664
—
—
57355
—
—
57356
—
—
57357
57362
—
57358
57363
—
57359
57364
—
BLIND BORE Bearings are available on special order.
Minimum quantities will apply.
166
Boston Gear 800-825-6544
P-1930-BG
04/10
BOStonE Molded Plastic Bearings
Roll End Bearings for Standard Steel Pipe
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE †
B
(Pipe Size)
A*
C
D
E
1/4
3/8
2
Sch.10
1/2
1
5/16 3/16
5/8
2.375 O.D.
2.152 I.D.
3/4
1/4
3/8
2
Sch.80
1/2
1
5/16 3/16
5/8
2.375 O.D.
1.939 I.D.
3/4
1/4
3/8
2-1/2
Sch.40
1/2
1
5/16 3/16
5/8
2.875 O.D.
2.469 I.D.
3/4
3/8
1/2
3
Sch.40
5/8
3/4
3.500 O.D.
3.068 I.D.
P-1930-BG
1
04/10
1-1/4
1-1/4
1-3/8
1-1/4
1-1/4
1-3/8
1-1/4
1-1/4
1-3/8
1-1/4
1-1/4
1-3/8
1-1/4
1-1/4
1-3/8
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/16
3/16
3/16
3/16
3/16
Catalog
Number
16P10D-1/4
16P10GS-1/4
16P10AF-1/4
16P10D-3/8
16P10GS-3/8
16P10AF-3/8
16P10D-1/2
16P10GS-1/2
16P10AF-1/2
16P10D-5/8
16P10GS-5/8
16P10AF-5/8
16P10D-3/4
16P10GS-3/4
16P10AF-3/4
16P80D-1/4
16P80GS-1/4
16P80AF-1/4
16P80D-3/8
16P80GS-3/8
16P80AF-3/8
16P80D-1/2
16P80GS-1/2
16P80AF-1/2
16P80D-5/8
16P80GS-5/8
16P80AF-5/8
16P80D-3/4
16P80GS-3/4
16P80AF-3/4
20P40D-1/4
20P40GS-1/4
20P40AF-1/4
20P40D-3/8
20P40GS-3/8
20P40AF-3/8
20P40D-1/2
20P40GS-1/2
20P40AF-1/2
20P40D-5/8
20P40GS-5/8
20P40AF-5/8
20P40D-3/4
20P40GS-3/4
20P40AF-3/4
24P40D-3/8
24P40GS-3/8
24P40AF-3/8
24P40D-1/2
24P40GS-1/2
24P40AF-1/2
24P40D-5/8
24P40GS-5/8
24P40AF-5/8
24P40D-3/4
24P40GS-3/4
24P40AF-3/4
24P40D-1
24P40GS-1
24P40AF-1
Item
Code †
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
57690
57695
—
57691
—
—
57692
—
—
57370
—
—
57371
—
—
57372
—
—
57373
—
—
57374
—
—
57385
57390
57395
57386
57391
57396
57387
57392
57397
57388
57393
57398
57389
57394
57399
F
C
D
B
A
E
PRESS
FIT INTO
ROLL SIZE
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
*These dimensions are approximately 1/64" larger than listed.
†Any item listed WITHOUT an Item Code Number is available on a SPECIAL
ORDER BASIS and minimum quantities may apply.
AF Bearings with 3" or larger O.D. will be supplied with an AF Flanged bushing
inserted into a D or GS Roll End Bearing. For these AF Bearings it is recommended to reduce the shaft diameter or increase bushing I.D. to obtain proper clearance.
BLIND BORE bearings are available on special order.
Minimum quantities will apply.
Boston Gear 800-825-6544
167
BOStonE Molded Plastic Bearings
Roll End Bearings for Standard Steel Pipe
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE †
B
(Pipe Size)
A*
C
1-3/4
1/2 1-3/4
1-7/8
1-3/4
5/8 1-3/4
1-7/8
1-3/4
4
3/4 1-3/4
Sch. 40
1-7/8
1-3/4
1 1-3/4
1-7/8
1-3/4
4.500 O.D. 1-1/4 1-3/4
4.026 I.D.
1-7/8
F
D
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
3/8
3/8
1/2
E
3/16
3/16
3/16
3/16
3/16
Catalog
Number
32P40D-1/2
32P40GS-1/2
32P40AF-1/2
32P40D-5/8
32P40GS-5/8
32P40AF-5/8
32P40D-3/4
32P40GS-3/4
32P40AF-3/4
32P40D-1
32P40GS-1
32P40AF-1
32P40D-1-1/4
32P40GS1-1/4
32P40AF-1-1/4
Item †
Code
57400
57405
57410
57401
57406
57411
57402
57407
57412
57403
57408
57411
57404
57409
57414
AF bearings with 3" or larger O.D. will be supplied with an AF Flanged bushing
inserted into a D or GS Roll End Bearing. For these AF Bearings it is recommended
to reduce the shaft diameter or increase bushing I.D. to obtain proper clearance.
C
D
BLIND BORE bearings are available on special order — minimum quantities will
apply.
B
A
E
PRESS
FIT INTO
ROLL SIZE
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
Teflon filled Acetal (Teflon added to Delrin or Celcon) — AF
*These dimensions are approximately 1/64” larger than listed.
†Any item listed WITHOUT an Item Code Number is available on a SPECIAL
ORDER BASIS – minimum quantities may apply.
168
Boston Gear 800-825-6544
P-1930-BG
04/10
BOStonE Molded Plastic Bearings
Extra Length – Blind Bore Bearing Inserts
Extra length Blind Bore inserts are available for Roll End
Bearings from 1-3/4" to 6" outside diameter. All Blind Bore
Bearing inserts listed below are made from Nylatron GS and
are designed to press fit into 3/4" I.D. Roll End Bearings.
F
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Roll
End
Brg.
Bore
A*
7/16
1/2
9/16
5/8
7/16
1/2
9/16
5/8
3/4
3/4
B
1
1
C
Max.
Depth
1-1/2 1-3/8
2
1-7/8
D
1/16
1/16
Catalog
Number
Item
Code
F7612B
F8612B
F9612B
F10612B
F7616B
F8616B
F9616B
F10616B
57482
57483
57484
–
57486
57487
57488
57489
C
B
BEARING
A
D
* These dimensions are approximately 1/64" larger than listed.
PRESS FIT INTO
ROLL END BRG.
BORE
Roll End Adapter for Hex Shaft
Hex shaft adapter bushings are available for Roll End
Bearings from 1" to 6" outside diameter. All hex shaft adapter
bushings are made from Nylatron GS and are designed to
provide a running fit with the Roll End Bearing bores listed
below.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
Hex
Shaft
Size
5/16
7/16
5/8
11/16
Roll
End
Brg.
Bore +
1/2
5/8
7/8*
7/8*
B
C
D
3/4
7/8 1/16
7/8
1
1/16
1-1/8 1-1/4 3/32
1-1/8 1-1/4 3/32
Catalog
Number
Item
Code
FH547
FH758
FH10710
FH11710
57479
57481
57707
57708
*7/8" I.D. Roll End Bearings are not available from stock. They may be
machined from any 3/4" bore size. Prices on application.
+I.D. of “AF” Roll End bearings may have to be enlarged approximately 1/64"
to obtain proper clearance.
P-1930-BG
04/10
C
B
ADAPTOR
BUSHING
A
D
RUNNING FIT
WITH ROLL END
BEARING BORE
Boston Gear 800-825-6544
169
BOStonE Molded Plastic Bearings
Guide Roll Bearings
Nylatron GS Roll End Bearing has an oversized flange.
Designed for use as a belt guide on conveyor rollers, or
on light duty trolley conveyors. Using 2" 16 Gage
Tubing.
F
Material
Nylatron GS (Molybdenum disulfide filled
nylon) — GS
3"
O.D.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER
OR ITEM CODE
3/8
1"
A
PRESS
FIT
INTO
ROLL
A
1/2
5/8
Catalog
Number
G1616GS-1/2
G1616GS-5/8
Item
Code
57704
57706
Also suitable to take 5/16, 3/8 and 7/16" hex shaft bushing.
1"
Rollers
These rollers are made from roll end bearings shown on pages 162
through 168. (Ribbed Construction)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
E
B
B
A*
C
D
E
.700
1/8
9/16
1/2
1/16
.800 3/16
9/16
5/8
1/16
.900
1/4
9/16
5/8
1/16
1.120
3/8
5/8
5/8
1/16
1.370
1/2
7/8
7/8
1/8
1.500
1/2
1
1
1/8
1.620
1/2
1
1
1/8
1.870
1/2
1
1
1/8
2.120
1/2
1
1
1/8
2.370
1/2
1
1
1/8
2.750
3/4
1-1/2 1-1/2 3/16
3.000
3/4
1-1/4
3.750
1
4.250
1
A
D
C
Material
Delrin or Celcon (Acetals) — D
Nylatron GS (Molybdenum disulfide filled nylon) — GS
*These dimensions are approximately 1/64" larger than listed.
170
Boston Gear 800-825-6544
2
1-3/4
Made
From
Cat. No.
622D-1/8
622GS-1/8
720D-3/16
720GS-3/16
818D-1/4
818GS-1/4
1016D-3/8
1016GS-3/8
1216D-1/2
1216GS-1/2
1316D-1/2
1316GS-1/2
1416D-1/2
1416GS-1/2
1616D-1/2
1616GS-1/2
1816D-1/2
1816GS-1/2
2016D-1/2
2016GS-1/2
2411D-3/4
2411GS-3/4
24P40D-3/4
24P40GS-3/4
3211D-1
2
3/16
2
3/16
2
3/16 3611D-1
Catalog
Number
Item
Code
R700D
R700GS
R800D
R800GS
R900D
R900GS
R1120D
R1120GS
R1370D
R1370GS
R1500D
R1500GS
R1620D
R1620GS
R1870D
R1870GS
R2120D
R2120GS
R2370D
R2370GS
R2750D
R2750GS
R3000D
R3000GS
R3750D
57492
57493
57494
57495
57496
57497
57498
57499
57500
57501
57502
57503
57504
57505
57506
57507
57508
57509
57510
57511
57512
57513
57514
57515
57516
R4250D
57518
P-1930-BG
04/10
BOStonE Molded Plastic Bearings
Shaft Clip
Secures round shaft to conveyor frame. Shaft can't turn or
slide out. Clip required on one end only, conventional cotter
pin can be used on other end.
F
Available from stock for 1/2" dia. shaft.
ORDER BY CATALOG NUMBER
OR ITEM CODE
Catalog
Number
Item
Code
SC-4
57490
1/8 DIA.
5/16
1 1/4
Stub Shaft for Rollers
This stainless steel screw and stub assembly fits Blind Bore
Roll End Bearings.
ORDER BY CATALOG NUMBER
OR ITEM CODE
Catalog
Number
Item
Code
SS-4
57491
1"
1/8
1/8 DIA. HOLE
CAP SCREW
1/2 DIA.
1/4 - 20 X 5/8 Lg
P-1930-BG
04/10
Boston Gear 800-825-6544
171
BOStonE Molded Nylon Bearings
Plain Cylindrical Bearings
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
F
B
A
A
B
C
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
7/8
15/16
1
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
1
1-1/16
1-1/8
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
1
1-1/16
1-1/8
Catalog
Number
Item
Code
NS35-2-1/2
NS46-3
NS57-3-1/2
NS68-4
NS79-4-1/2
NS810-5
NS911-5-1/2
NS1012-6
NS1113-6-1/2
NS1214-7
NS1416-8
NS1517-8-1/2
NS1618-9
56883
56884
56885
56886
56887
56888
56889
56890
56891
56892
56894
56895
56896
C
STANDARD TOLERANCES
Dimensions
Tolerance
A
B
All
± .015
C
All
± .015
Flanged Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
D
B A
E
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
7/8
15/16
1
B
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
1
1-1/16
1-1/8
C
D
E
Catalog
Number
Item
Code
5/16
7/16 1/16 NF35-2-1/2 56897
3/8
1/2 1/16 NF46-3
56898
7/16
9/16 1/16 NF57-3-1/2 56899
1/2
5/8 1/16 NF68-4
56900
9/16
11/16 1/16 NF79-4-1/2 56901
5/8
3/4 1/16 NF810-5
56902
11/16 15/16 1/16 NF911-5-1/2 56903
3/4
7/8 1/16 NF1012-6
56904
13/16
1
1/16 NF1113-6-1/2 56905
7/8 1-1/16 1/16 NF1214-7
56906
1
1-3/16 1/16 NF1416-8
56908
1-1/16 1-1/4 1/16 NF1517-8-1/2 56909
1-1/8 1-5/16 1/16 NF1618-9
56910
C
STANDARD TOLERANCES
Dimensions
A
B
D
E
C
172
Boston Gear 800-825-6544
Tolerance
All
± .015
All
± .015
P-1930-BG
04/10
BOStonE Molded Nylon Bearings
Thrust Type
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
3/16
.189
1/4
.255
1/2
.503
9/16
.565
5/8
.630
3/4
.760
7/8
.890
1-1/4
1.290
1-1/2
1.555
3/4
.750
5/8
.620
13/16
.820
13/16
.812
1
1.000
1-1/16
1.063
1-1/8
1.125
2-1/8
2.140
2-1/16
2.058
1/16
.070
3/32
.097
3/32
.095
3/32
.095
3/32
.094
3/32
.094
3/32
.094
3/32
.098
1/8
.120
Catalog
Number
Item
Code
NT312
56911
NT410
56912
NT813
56913
NT913
56914
NT1016
56915
NT1217
56916
NT1418
56917
NT2034
56918
NT2533
56919
F
A
B
C
Tolerances apply to actual (decimal) dimensions.
STANDARD TOLERANCES
Dimensions
Tolerance
A
B
C
All
± .015
Cable Pulleys
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
C
G
F
H
J
1-1/4 1/4 .400
1/2 31/32
2-5/8 3/8 .500 017 3/4 2-1/8
2-5/8 1/2 .500 — 3/4 2-1/8
Cable Catalog Item
Size Number Code
1/4
1/4
1/4
P1250-2 57522
P2625-3 57525
P2625-4 57526
STANDARD TOLERANCES
C
Dimensions
Tolerance
All
+ .005 to + .010
A
J
H
TYP.
C
F
TYP.
G
P-1930-BG
04/10
Boston Gear 800-825-6544
173
Engineering Information
Sleeve Bearing Selection
F
The performance of a bearing is influenced by the conditions
of speed, mating materials, clearances, temperature,
lubrication, type of loading, etc. Of primary importance, is the
maintenance of an oil film between the bearing surfaces to
reduce friction, dissipate heat and retard wear by minimizing
metal to metal contact. The most critical periods of operation
are during starting and stopping, when the load may cause the
bearing surfaces to come into contact with each other. For
these reasons it is not practical to predict the wear rate of
bronze bearings.
The selection of the best bearing for an application can be a
very complicated problem because the combined influence of
the many factors affecting the operation is difficult to predict.
The following information may be used as a guide for selecting
a Bronze sleeve bearing which should satisfy the
requirements.
For practical reasons, the length of the bearing should
normally be between one and two times the shaft diameter
and the O.D. approximately 25% larger than the shaft
diameter.
Starting and Stopping/
Oscillatory Motion/Cyclical Overload conditions mean a full
film of oil cannot be maintained. When this happens, metal-tometal contact occurs and causes bearing wear. Because of
the continual interruption of the oil film, a larger safety factor is
required when designing bearings for applications of this type.
A lower permissible PV factor must be considered.
Speed/Oil Viscosity must also be considered. The proper
viscosity oil must be selected for each particular speed
application, to achieve optimum bearing operation.
For high speed applications, a light oil (150 SUS at 100°F) is
required to keep internal oil friction at a minimum and assure
proper metering of the oil to the bearing/shaft surface.
For moderate speeds, a medium-viscosity oil (400 SUS at
100°F) is required.
For very low shaft speeds under moderate or heavy loads, a
heavier oil with an extreme pressure additive may be required
to prevent complete oil film rupture and give sufficient
lubrication for proper operation.
174
Boston Gear 800-825-6544
Shaft Consideration is extremely important in bearing
applications. For optimum operation the shaft must be of
proper material, hardness, surface finish, roundness and
dimensions. Experience indicates that carbon steels, and
preferably C1137, offer the best operating results. If stainless
steel shafts are to be used, 400 Series is recommended.
Austenitic 300 Series stainless steel tends to gall, which
results in extreme wear and shortened life. If 300 Series
stainless is required for its non-magnetic qualities, it is
strongly recommended that shafts be work-hardened or
chrome-plated for satisfactory operation.
For best results, a shaft surface finish of 4 to 12 RMS is
recommended. Nicks, gouges, and burrs should be avoided
because they rupture the oil film and cause metal-to-metal
contact.
Shaft roundness and dimensions also contribute greatly to
bearing life. The more round the shaft, the less the bearing
and shaft wear, with longer life resulting. Dimensions also play
an important role in operation and should always be in accord
with the recommended bearing clearance charts.
As stated, for practical reasons the bearing length should
normally be between one and two times the shaft diameter.
However, the recommended practice is by using the PV
factor. PV is a means of measuring the performance
capabilities of bearings. P is expressed as pressure or pounds
per square inch on the projected area of the bearing. V is
velocity in feet per minute of the wear surface (surface feet per
minute).
“PV” is expressed by the following:
PV =
W
πdn
πWn
.262Wn
__ x ____
= ____ = ______
Ld
12
12L
L
P
=
W
_________________
A (Brg. I.D. x Length)
V
=
Surface velocity of the shaft, ft./min.
(.262 x RPM x Shaft Dia.)
W =
Bearing load in pounds
L
=
Bearing length in inches
d
=
I.D. of bearing in inches
(cancels out of formula)
n
=
Shaft speed, RPM
P-1930-BG
04/10
Engineering Information
Sleeve Bearing Selection (Continued)
Each material has a specific maximum PV rating, as shown in
the following Table. In addition, it also has a maximum
pressure (P) and velocity (V) limitation. These values should
not be exceeded. At no time can all maximum values be
utilized.
Material
BEAR-N-BRONZ
BOST-BRONZ
BOST-BRONZ
(Thrust Washers)
F1
TN
AF
GS
D
N
UHMW-PE
Nyloil
UHMW-PE with
Internal Wear Strip
Nyloil with
Internal Wear Strip
Max. PV
75,000
50,000
Max. P
3,000
2,000
Max. V
750
1,200
10,000
20,000
10,000
8,000
4,000
3,000
3,000
2,300
16,000
2,000
1,000
800
750
500
480
480
1,400
2,000
1,200
400
300
300
300
300
300
100
400
4,000
1,400
100
16,000
2,000
400
All values based on 72°F ambient temperature and standard
lubricant, when required.
NOTE:
Above figures should be considered maximum and
not to be exceeded.
For Bearing II—
PV =
.262 x W2 x n
L (In. of Lgth.)
F
= .262 x 157.5 x 500
1
= 20632
With the calculated PV of 6877, Bearing I, and 20,632,
Bearing II, it can be seen from the Table, that a BOSTBRONZ bearing, one inch long, will not exceed Maximum PV.
NOTE:
An increase in L will decrease the value of PV;
conversely, a shortening of L increases the value of
PV.
A check of PV calculations should now be performed to
assure that Max. “P” and Max. “V” is not exceeded.
PV Max. = P Max. x V Max.
V = .262 x Shaft Dia. x n
= .262 x .625 x 500 = 81.9
Bearing I
P=
PV
6877
=
= 83.9
V
81.9
Bearing II
P=
PV
20632
=
= 251.9
V
81.9
As can be seen, we have not exceeded any maximum values.
We can now select an actual Bost-Bronz bearing.
EXAMPLE
Knowing:
Select a BOST-BRONZ (oil impregnated) bearing to satisfy
the following conditions.
Shaft Dia. 5/8" = Bearing I.D. 5/8"
Known—
Bearing O.D. should be approximately 25% larger than I.D.
Bearing O.D. = .625 x 1.25 = .781"
5/8" Shaft Diameter
n = 500 RPM
W1 = Load Bearing I = L I = 52.5 Lbs.
W2 = Load Bearing II = L II = 157.5 Lbs.
L = Length of Bearing
Referring to Bost-Bronz listings, Page 12, we find 5/8" I.D.
bearings listed with O.D.’s from 3/4 to 1" and lengths from
1/2 to 2".
From this selection of bearings, we may choose a bearing to
fit the requirements.
Since Bearing I is lightly loaded, for practical reasons, we
select a bearing length of one times bearing I.D. We select a
B1013-5 (5/8" I.D. x 13/16 O.D. x 5/8" long).
For Bearing I—
PV =
.262 x W1 x n
L (In. of Lgth)
= .262 x 52.5 x 500
1
= 6877
P-1930-BG
04/10
Boston Gear 800-825-6544
175
Engineering Information
Sleeve Bearing Selection (Continued)
EXAMPLE (Continued):
F
For Bearing II we will select a length of two times bearing I.D.
— B1013-10. (In actual practice, it may be more suitable to
select one common size — B1013-10.)
For a double-check of PV, we should use actual bearing
selected:
PV
PV Actual =
L (Actual Bearing)
6877
Bearing I PVA=
= 10043
.625
20632
Bearing II PVA =
= 16505
1.25
As a relative measure of the performance of one composite
vs. another at the same operating conditions, the K factors
have proven to be highly reliable.
t = K (PVT)
t = Wear in inches
P =
W (Total Load)
A (Brg. I.D. x Lgth.)
V = Velocity in ft. per minute
(.262 x RPM x Shaft Dia.)
T =
t
KPV
T = Running time in hours
Actual PV values are below Maximum PV values shown in
Table.
K = Wear rate factor
Sleeve Bearing Wear Life
Delrin or Celcon
(D)
Nylatron GS . . .
(GS)
Teflon filled Acetal (AF)
Teflon filled Nylon (TN)
Glass Filled Teflon ( F-1)
Nylon
Wear life cannot be applied to BOST-BRONZ (oilimpregnated) or BEAR-N-BRONZ (SAE CA932/660) bearings.
Under ideal conditions the shaft rides on a film of oil, and will
give almost infinite life. If this film of oil is disrupted, intimate
metal-to-metal contact results leading to eventual failure.
Non-Metallic and Non-Lubricated Bearings
Wear rate is generally defined as the volumetric loss of
material over a unit of time. Several mechanisms operate
simultaneously to remove material from the wear interface,
however, the primary mechanism is adhesive wear which is
characterized by fine particles of polymer being removed from
the surface. The presence of this powder is a good indication
that the rubbing surfaces are wearing properly. The presence
of melted polymer or large gouges or grooves at the interface
is normally an indication that the materials are abrading and
wearing and/or the pressure velocity limits of the materials are
being exceeded.
Once a Wear Rate factor (K) has been established it can be
used by the engineer to calculate wear rates of bearings,
gears, etc. However, because wear rates is affected by
material types, finishes and hardness as well as environmental
temperature and part design, large errors may result as end
use variables begin to differ from those selected for the test
procedure.
K
50 x 10 -10
35 x 10 -10
17 x 10 -10
13 x 10 -10
12 x 10 -10
12 x 10 -10
Values for plastic resins assume no trace of lubricant present.
A simple calculation could be made as follows:
Assumptions: 1.
2.
3.
4.
5.
Problem:
1616D-1/2 Delrin Roll End Bearing
.020 inch allowable wear limit
50 lbs. load on roll (25 lbs. per bearing)
100 RPM
Normal environment with no lubrication
Find estimated wear life
Solution:
πWn π x 25 x 100
PV =
=
= 655
12L
12 x 1
t = K (PVT)
t
T =
KPV
or
.020
x 655
50 x 10-10
T = 6100 hrs.
The use of low viscosity lubricant applied initially and/or
periodically during operation of the bearing would extend the
life several times.
BostonE F-1 material is generally limited to a bearing
maximum of 1,000 p.s.i. For more detailed design calculations
Fig. 2 shows actual deformation values as a function of
temperature and load.
The coefficient of friction of BostonE F-1 varies with changes
in load and speed when operated dry. Figure 3 shows the
variation with load and Figure 4 shows the variation with
speed.
176
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Sleeve Bearing Wear Life (Continued)
For optimum performance of BostonE F-1 bearings, the
mating surface should be as hard as possible. Mild steel,
however, will give satisfactory results.
500
Figures 1 through 6 apply to BostonE F-1 material only.
1000
F
300
200
100
15,000
PV
10,000
PV
SLIDING SPEED (F.P.M.)
400
A surface finish range of 8-16 micro-inches is preferred;
however, good results will be obtained with finishes to 32
micro-inches.
800
0
0.1
0.2
0.3
0.4
TIME (HRS)
COEFFICIENT OF FRICTION (F)
600
FIGURE 4 — SPEED VS. FRICTION
Coefficient of Friction
400
Shaft Material
200
Load
(psi)
Deformation (%)
Hardened Steel
Stainless Steel
Chromium Plated Steel
Cast Iron
Hard Anodized Aluminum
Monel
Cold Rolled Steel
*Brass
*Aluminum
78°F
300°F
*High rate of shaft wear
250
500
750
1000
1250
1500
.1
.3
.5
.8
1.1
1.6
.4
1.4
2.9
—
—
—
20,000
PV
0
.0020
.0040
.0060
RADIAL WEAR (IN.)
FIGURE 1 — TIME VS. RADIAL WEAR
(UNLUBRICATED)
FIGURE 2 — DEFORMATION
UNDER LOAD
2000
LOAD (P.S.I.)
1500
1000
500
0.15
0.15
0.16
0.19
0.20
0.23
0.25
0.33
0.35
FIGURE 5 — EFFECT OF MATING SURFACES
WITH BOSTONE F-1
Coefficient of Expansion
Temperature
Range
+68°F. to – 400°
+68°F. to – 300°
+68°F. to – 200°
+68°F. to – 100°
+68°F. to 0°
+68°F. to +78°
(approximate data)
+78°F. to +100°
+78°F. to +200°
+78°F. to +300°
+78°F. to +400°
+78°F. to +500°
C.D.
M.D.
(all values are x 10-5)
–1.8
–2.3
–2.9
–3.5
–4.4
12
–3.5
–4.0
–4.3
–4.8
–5.9
25
3.5
3.5
3.6
4.2
5.0
6.0
6.2
7.0
7.8
8.5
M.D. = Molded Direction (parallel to length of molded or
extruded rod or tube)
0
.05
.10
.15
.20
COEFFICIENT OF FRICTION (F)
C.D. = Cross Direction (perpendicular to length of molded or
extruded rod or tube)
All tubes are approximately ± 5%.
FIGURE 3 — LOAD VS. FRICTION
P-1930-BG
04/10
FIGURE 6 — COEFFICIENT OF LINEAR THERMAL
EXPANSION
Boston Gear 800-825-6544
177
Engineering Information
Lubrication – BOST-BRONZ
F
All standard BOST-BRONZ bearings, bars and plates are
impregnated with a high grade, oxidation-resistant mineral oil
of SAE30 (ISO 100) viscosity. If properly stored,
BOST-BRONZ parts retain their oil supply indefinitely. To
prevent loss of lubricant, BOST-BRONZ should be stored in
non-absorbent materials (metal, plastic, or suitably lined
containers, etc.) The bearings should be covered to keep out
dirt and dust.
Immerse parts in a good grade of oil solvent, such as lead-free
gasoline, naptha, carbon tetrachloride or alcohol. Change
solvent often, until solvent appears clear. Agitation will hasten
the process.
RE-OILING: BOST-BRONZ parts may be re-impregnated by
submerging in oil (pre-heated to about 150°F) for
approximately 30 minutes. More time should be allowed for
larger parts.
REMOVING LUBRICANT: If it becomes necessary to remove
the oil from BOST-BRONZ, for example to replace with
another type or viscosity of lubricant, the following procedure
may be used.:
Supplementary Lubrication
The following designs illustrate simple, effective arrangements
for providing supplementary lubrication.
OIL
CUP
BOST-BRONZ
BEARING
BOST-BRONZ
BEARING
BOST-BRONZ
BEARING
BOST-BRONZ
BEARINGS
OIL RESERVOIR
FELT
WICK
OIL SATURATED
FELT WASHER
Lubrication – BEAR-N-BRONZ
The maintenance of an oil film between the shaft and bearing
surfaces is extremely important, serving to reduce friction,
dissipate heat, and retard wear by minimizing any metal to
metal contact.
Lubricant is usually supplied into the bearing from an oil cup
or fitting through an oil hole.
The drawings below illustrate two typical methods.
GREASE FITTING
SLEEVE BEARING
SLEEVE BEARING
A. Oil Cup
B. Oil or Grease Fitting
Oil is fed from the oil cup to the bearing by gravity.
Lubricant is fed through the fitting under pressure and
distributed through grooves by the rotation of the shaft.
178
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Lubrication – BEAR-N-BRONZ (Continued)
Grooving
1. An oil feeder hole is normally sufficient for small bearings
under light loads.
The oil hole should be in a position to introduce the lubricant
to the non-loaded area of the bearing. The lubricant will then
normally be carried to the loaded area by the rotation of the
shaft.
For larger bearings under heavy loads, it may be desirable to
facilitate the flow of lubricant to the pressure area by means of
grooves machined into the bearing surface.
3. Very long bearings may require two feeder holes connected
by one straight (axial) groove.
4. Oil grooves should stop short of the bearing ends to
minimize oil leakage.
5. Grease lubricants are normally restricted to applications
subjected to heavy loads at low speeds. Grease should be
distributed under pressure along oil grooves to the loaded
area. Type VI or Type VII grooves may be used for grease
lubrication.
Below are illustrations of some popular styles of oil grooves:
2. Type I or Type II grooves have proven adequate for most
applications requiring an oil groove. In either case, the oil feed
hole introducing the lubricant should always be located in the
unloaded bearing area.
Depth of oil groove is 1/8" max. if wall permits. On thin wall
bearings depth of groove is normally less than 1/2" wall thickness.
When applicable groove is located 1/8" from ends.
P-1930-BG
04/10
Boston Gear 800-825-6544
179
F
Engineering Information
Shaft Clearances
The following graphs may be used as a guide to determine
shaft clearance for proper running fit.
F
BOST-BRONZ
BEAR-N-BRONZ
.010
M
U
XIM
.003
MA
.002
MEAN
MINIMUM
.001
.000
.007
M
.006
U
.004
.008
.005
IM
.005
.009
AX
.006
.004
M
SHAFT CLEARANCE IN INCHES
SHAFT CLEARANCE IN INCHES
.007
.003
M
MU
I
MIN
.002
.001
.000
0
.5 1.0 1.5 2.0 2.5 3.0 3.5
0 .5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
SHAFT DIAMETER IN INCHES
SHAFT DIAMETER IN INCHES
Plastics
APPROX. SHAFT CLEARANCE IN INCHES
.030
.025
UM
XIM
MA
.020
MAXIMUM
F-1
.015
UM
MINIM
.010
MINIMUM
F-1
.005
.000
0
.5
1.0
1.5
2.0
SHAFT DIAMETER IN INCHES
180
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Press Fit Allowances
The allowance for press fit into a housing will vary depending
upon bearing size, wall thickness, housing material, and
housing construction. The accompanying graphs will be a
useful guide in determining allowances for press fits.
BEAR-N-BRONZ
BOST-BRONZ
When a BOST-BRONZ bearing is pressed into a housing, the
inside diameter (I.D.) will close-in (becoming smaller). The
amount will depend upon the same factors influencing the
Press Fit, but will average approximately 75% of the Press Fit
allowance.
.005
.004
PRESS FIT IN INCHES
F
M
MU
I
AX
.003
M
.002
HO
US
IN
G
.007
0
.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
HOUSING DIAMETER IN INCHES
M
FT
L
EE
OR
.F
R
N
AX
.000
IN
.004
HO
ST
O
RO
.I
AX
M
.003
Plastics
.002
Due to normal variations in molded bearings, practicality
dictates the measuring of actual bearing O.D. and adjusting
bore size accordingly.
.001
IMU
MIN
For this reason, the minimum required press fit depicted in
graph, for F-1 material and other plastic material is
approximate and may be used as a guide.
G
US
SO
.005
M
MIN
UM
PRESS FIT IN INCHES
IM
.001
ET
AL
.006
M
.000
0
.5
1.0
1.5
2.0
2.5
3.0
3.5
HOUSING DIAMETER IN INCHES
.010
.009
UM
.007
NIM
.006
MI
PRESS FIT IN INCHES
.008
.005
.004
.003
.002
NI
MI
.001
M
MU
F-1
ON
LY
.000
0
.5
1.0 1.5 2.0 2.5 3.0 3.5
HOUSING DIAMETER IN INCHES
P-1930-BG
04/10
Boston Gear 800-825-6544
181
Engineering Information
Machining
In cases where it is desired to alter a standard stock bearing
or to manufacture parts from a bronze bar or plate stock, the
following machining practices are suggested.
F
BOST-BRONZ
BOST-BRONZ may be readily machined. For best results, use
carbide tools. For finishing cuts on bearing surfaces, the
cutting tool should be extremely sharp. Use feeds and speeds
that are normal for machining regular bronze. Finish with a
light cut (up to .005"). This method avoids the pulling or
spreading of metal over the surface pores. Cutting oils or
coolants should not be used. After machining, parts should be
reoiled, using a good grade of oxidation-resistant mineral oil of
about SAE20 (ISO 68) viscosity. For re-oiling procedure, see
lubrication, Page 178.
BEAR-N-BRONZ
The use of carbide tools or high speed tools is recommended
for machining Bear-N-Bronz. Carbide tools should be used at
speeds of 500 to 1000 surface feet per minute. High speed
steel tools should be used to 200 to 500 surface feet per
minute. Either tool should be held to a minimum clearance
angle for best results. Cutting solutions are not required.
Assembly and Sizing – BOST-BRONZ
In most instances, sizing the bore of BOST-BRONZ bearing is
not necessary. The desired inside diameter will be obtained
by proper press fit (and close-in) at assembly. In applications
where sizing is necessary, it may be accomplished during
assembly by the use of a shouldered sizing arbor, as
illustrated in Figure 1. The arbor should be ground and lapped
to a size slightly larger (.0002" to .0003" approx.) than the
hole desired. A multiple step burnishing tool (see Figure 2)
may also be used to size the hole in BOST-BRONZ bearings
after assembly.
.9960" DIA
3/64"
6"
1.0022" DIA
1.0023" DIA
1.0023" DIA
1.0020" DIA
1.0015" DIA
1.0010" DIA
1.0000" DIA
.9990" DIA
1/32" RAD
3/32"
ARBOR
ARBOR
.9960" DIA
BEAR-N-BRONZ
BOST-BRONZ
BEARING
BEARING
PILOT
FIGURE 2.
HOUSING
HOUSING
FIGURE 1.
Assembly – BEAR-N-BRONZ
ARBOR
ARBOR
BEAR-N-BRONZ can be easily assembled by using a
shouldered arbor, as illustrated, to maintain proper bearing
alignment. A steady, even pressure should be applied. The
arbor diameter should be of a size to allow for close-in of
bearing I.D. at assembly. The surface of the arbor should be
lightly oiled to facilitate withdrawal after assembly.
BEAR-N-BRONZ
BOST-BRONZ
BEARING
BEARING
HOUSING
HOUSING
182
Boston Gear 800-825-6544
P-1930-BG
04/10
Anti-Friction Bearings
F
Boston Gear’s line of unmounted, inch size ball
bearings, rod ends, spherical and linear bearings, give
the designer freedom to choose from a wide range of
quality bearing products that will resolve numerous
application problems.
Boston Gear’s inch size ball bearings are offered in
Precision Ground, Semi- and Unground Radial and
Thrust bearings. Our rod end and linear bearings are
offered in Precision and Commercial Series.
Ball Bearings
Boston Ball Bearings provide improved performance
over a wide range of operating conditions.
Major features include: Honed raceways on precision
ball bearings for maximum life and smoother, quieter
operation. Superior, low friction (low torque) seals, to
more effectively exclude foreign matter and retain
lubricant over a longer period.
The line of Ball Bearings include close tolerance
precision units and inexpensive steel assemblies of the
semi-ground type. These anti-friction items, available
quickly from stock, make it easier to use a superior
bearing “exactly right” for the majority of applications.
P-1930-BG
04/10
Boston Gear 800-825-6544
183
Anti-Friction Bearings
Ball Bearings (Continued)
The bearings listed in this catalog are made from steel of
various analyses. Carburizing grades are case hardened to
the desired depths and hardness values, insuring high
resistance to wear and breakdown. High carbon chrome
alloy steels are through hardened. If you have a special
material application, Boston Gear engineers will welcome
the opportunity to help you make a proper bearing
selection.
F
Bearings in this catalog may be selected according to
finish or accuracy: ground bearings are available in the
radial and thrust designs primarily. With boundary
dimensions and internal fit-up held to exacting tolerances
and with ground and polished ball grooves, ground
bearings are recommended for applications requiring
greater speeds and loads and where quiet accurate
operation is essential. Normal tolerance level is
.005"/.0010".
Unground bearings are designed for applications where
speeds and loads are moderate and the requirements of
running accuracy and noise level do not warrant the more
expensive ground precision bearing. The three basic
design types are available. Normal tolerance level is
.005"/.010".
Rod End and Spherical Bearings
Boston Gear’s broad line of rod end and spherical
bearings serve many markets, which include textile,
agriculture and off-highway vehicles along with military.
184
Boston Gear 800-825-6544
P-1930-BG
04/10
Anti-Friction Bearings
1600 Series
Radial Ball Bearings; Ground, Single Row
HIGH QUALITY INCH DIMENSIONAL BEARINGS for adaptation to many
precision bearing applications. Suitable for speeds in the neighborhood of
5000 R.P.M.
IMPROVED BALL GROOVE FINISH for smoother, quieter operation.
F
GROUND BORES held to a tolerance of + .0000" to –.0005" on all sizes,
1/4" bore and over.
NYLON BALL RETAINERS (TN) furnished as standard. Steel retainers (J)
available on special production order.
GREASE PACKED as standard on Types DC and DS. Types SC, SS and
NS can be grease packed on special order.
NYLON SEALS more effectively retain lubricant and exclude foreign
matter.
SPECIAL FEATURES including dimensions, tolerances, etc. available on
special order.
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
.2500
.3125
.3750
.3125
.3750
.4375
.3750
.4375
.5000
.4375
.5000
.6250
.6250
.7500
.6250
.7500
.7500
.8750
1.0000
1.1250
1.2500
1.2500
Double Shield
Catalog
Item
Number
Code
Double Sealed
Catalog
Item
Number
Code
1602DS
1603DS
1604DS
1605DS
1606DS
1607DS
1614DS
1615DS
1616DS
1620DS
1621DS
1623DS
1628DS
1630DS
1633DS
1635DS
1638DS
1640DS
1641DS
1652DS
1654DS
1657DS
1602DC
1603DC
1604DC
1605DC
1606DC
1607DC
1614DC
1615DC
1616DC
—
1621DC
1623DC
1628DC
1630DC
1633DC
1635DC
1638DC
1640DC
1641DC
1652DC
1654DC
1657DC
50724
50725
50726
50727
50728
50729
50730
50731
50732
50733
50734
50736
50737
50738
50739
50740
50741
50742
50743
50744
50745
50746
50701
50702
50703
50704
50705
50706
50707
50708
50709
—
50710
50712
50713
50714
50715
50716
50717
50718
50719
50720
50721
50722
NOTE: Dimensions and load data on next page.
Seal and Shield Arrangements
TYPES SC, SS and NS
are available via
special order only
P-1930-BG
04/10
DOUBLE
SEALED
DOUBLE
SHIELD
SINGLE
SEAL
SINGLE
SHIELD
NO
SHIELDS
DC
DS
SC
SS
NS
Boston Gear 800-825-6544
185
Anti-Friction Bearings
1600 Series
Radial Ball Bearings; Ground, Single Row
ALL DIMENSIONS IN INCHES
Basic
Bearing No.
1602
1603
1604
1605
1606
1607
1614
1615
1616
1620
1621
1623
1628
1630
1633
1635
1638
1640
1641
1652
1654
1657
C
F
B
A
R
STANDARD TOLERANCES
Dimensions
Tolerance
A
B
2500–1.2500 +.0000 to – .0005
.6875–1.7500 +.0000 to – .0005
2.0000–2.5625 +.0000 to – .0006
C
All
+.000 to – .005
The indicated load ratings are
based on 2500 hours average
life. (L50) to determine the load
ratings at 3500 and 5000
hours, 90 percent and 80
percent respectively, of the
above ratings should be used.
186
Boston Gear 800-825-6544
R
Radius
.6875
1/4+
.012
.012
.8750 9/32++
.015
.012
.9063
5/16
.015
.015
B
.2500
.3125
.3750
.3125
.3750
.4375
.3750
.4375
.5000
.4375
.5000
.6250
.6250
.7500
.6250
.7500
.7500
.8750
1.0000
1.1250
1.2500
1.2500
C
Balls
No. Dia.
6
1/8
7
5/32
9
1/8
1.1250
3/8
.025
7
3/16
1.3750
7/16
.025
8
15/64
1.6250
1/2
.025
8
1/4
1.7500
1/2
.025
8
1/4
2.0000
9/16
.035
10
1/4
2.5000
5/8
.035
10
5/16
.035
9
3/8
2.5625 11/16
*Maximum fillet on shaft or in housing which bearing corner will clear.
+ Width SC & DC = 5/16"
++ Width SC & DC = 11/32"
For recommended shaft and housing fits, see
engineering section, page 238.
Load Data
A
Basic
Bearing
Number
1602
1603
1604
1605
1606
1607
1614
1615
1616
1620
1621
1623
1628
1630
1633
1635
1638
1640
1641
1652
1654
1657
50
230
100
185
Radial Capacity (Lbs.)
Revolutions Per Minute
300
500
1200
1800
130
110
80
70
380
300
210
175
130
305
245
170
140
530
420
290
860
690
980
2500
65
5000
50
Limiting
Thrust
(Lbs.)
42
115
105
80
75
105
95
85
65
65
245
185
160
145
115
110
475
400
300
260
235
185
200
780
540
460
340
300
265
210
225
1140
905
630
530
395
345
310
245
280
1695
1345
935
790
590
515
460
365
440
2200
1750
1215
1025
765
665
600
475
570
P-1930-BG
04/10
Anti-Friction Bearings
7500 Series
Radial Ball Bearings; Ground, Single Row
NYLON BALL RETAINERS (TN) standard on all sizes.
SINGLE LIP CONTACT SEALS effectively retain
lubricant and exclude foreign material.
F
GREASE PACKED as standard on all “Double Sealed”
Type DL and DLG.
SPECIAL FEATURES including dimensions, tolerances,
single or without seals, steel retainers available on special
order if quantity warrants.
SNAP RINGS included on all Type DLG sizes. Type DL
sizes include snap ring groove but no snap rings
furnished.
E
C
D
G
H
D
B
STANDARD TOLERANCES
Dimensions
Tolerance
All
+.0000
to –.0005
A
1.7500
+.0000 to –.0005
B 2.0000-2.5625 +.0000 to –.0006
J
A
F
C
E
All
All
+.000 to –.005
+.000 to –.005
G
All
±.005
R
7500 DL
DOUBLE SEAL
7500 DLG
DOUBLE SEAL
WITH SNAP RING
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
.5000
.6250 1.7500
.7500
1.0000 2.0000
1.2500 2.5625
C
D
E
F
G
H
J
R
Radius
*
Balls
No.
5/8 1/16
3/4
.993 .136 .042 1-59/64
.035
8
5/8 1/16
3/4 1/16
3/4
7/8
1.290 .136 .042 2-5/32
1.631 .190 .065 2-49/64
.035
.035
10
9
DL Series
Catalog Item
Dia. Number Code
DLG Series
Catalog
Item
Number
Code
7508DL
1/4 7510DL
7512DL
1/4 7516DL
3/8 7520DL
7508DLG
7510DLG
7512DLG
7516DLG
7520DLG
50587
50588
50589
50591
50592
50581
50582
50583
50585
50586
*Maximum fillet on shaft or housing which bearing will clear.
For recommended shaft and housing fits, see engineering section, page 238.
Load Data
Basic
Bearing
Number
7508-7512
7516
7520
P-1930-BG
50
1180
1365
2640
04/10
100
940
1085
2100
300
650
750
1460
Radial Capacity (Lbs.)
Revolutions Per Minute
500 1000 1200 1800 2500
550 435 410 360 320
635 505 475 415 370
1230 975 915 805 715
3600
285
330
635
5000
255
295
570
Max.
Thrust
Lbs.
340
375
740
The indicated load ratings
are based on 2500 hours
average life (L50). To
determine the load ratings
at 3500 and 5000 hours,
90 percent and 80 percent
respectively, of the above
ratings should be used.
Boston Gear 800-825-6544
187
Anti-Friction Bearings
7600 Series
Radial Ball Bearings; Ground, Single Row; Extended Inner Race
NYLON BALL RETAINERS (TN) standard on all sizes.
SINGLE LIP CONTACT SEALS effectively retain
lubricant and exclude foreign material.
F
GREASE PACKED as standard on all “Double Sealed”
Type DL and DLG.
SPECIAL FEATURES including dimensions, tolerances,
single or without seals, steel retainers available on special
order if quantity warrants.
SNAP RINGS included on all Type DLG sizes. Type DL
sizes include snap ring groove but no snap rings
furnished.
G
K
STANDARD TOLERANCES
Dimensions
A
D
C
L
Tolerance
M
All
+.0008 to –.0000
1.7500
+.0000 to –.0005
2.0000-2.5625 +.0000 to –.0006
B
C
E
G
All
All
All
+.000 to –.005
+.000 to –.005
±.005
K
All
+.000 to –.005
H
N
B
J
A
F
R
7600 DLG
DOUBLE SEAL
WITH SNAP RING
7600 DL
DOUBLE SEAL
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
D
F
G
H
J
K
L
M
N
R*
Balls
Radius
No. Dia.
*
.6250
1.7500 5/8 1/16 .993 .136 .042 1-59/64 1.092 .405 .233 10-32 .035
.7500
1.0000 2.0000 5/8 1/16 1.290 .136 .042 2-5/32 1.179 .492 .261 10-32 .035
1.2500 2.5625 3/4 1/16 1.631 .190 .065 2-49/64 1.417 .605 .261 1/4-28 .035
8
1/4
10
9
1/4
3/8
DL Series
Catalog Item
Number Code
DLG Series
Catalog
Item
Number
Code
7610DL
7612DL
7616DL
7620DL
7610DLG
7612DLG
7616DLG
7620DLG
50600
50601
50603
50604
50594
50595
50597
50598
*Maximum fillet on shaft or housing which bearing will clear.
For recommended shaft and housing fits, see engineering section, page 238.
Load Data
The indicated load ratings are
based on 2500 hours average
life (L50). To determine the load
ratings at 3500 and 5000
hours, 90 percent and 80
percent respectively, of the
above ratings should be used.
188
Boston Gear 800-825-6544
Basic
Bearing
Number
50
7610-7612 1180
7616
1365
7620
2640
100
Radial Capacity (Lbs.)
Revolutions Per Minute
300
500 1000 1200 1800 2500
3600
5000
Max.
Thrust
(Lbs.)
940
1085
2100
650
550
750
635
1460 1230
285
330
635
255
295
570
340
375
740
435
505
975
410
475
915
360
415
805
320
370
715
P-1930-BG
04/10
Anti-Friction Bearings
6900 Series
Radial Ball Bearings; Ground, Single Row; Flange Mounted
AVAILABLE AS COMPLETE ASSEMBLY, BEARING only or
HOUSING only.
INNER RACE includes 2 setscrews.
F
GREASE PACKED, COMPOSITION SEALED.
NYLON RETAINERS (TN) furnished as standard.
C
M
J
K
D
L
N
C
O
STANDARD TOLERANCES
H
A
E
A
S
Dimensions
All
B
Tolerance
+.005 to –.000
.9062-1.6250 +.0000 to –.0005
2.000
+.0000 to –.0006
B
G
C
All
+.000 to –.005
F
P
ASSEMBLY
BEARING
ONLY
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
D
E
F
G
Bolt
Ctrs.
H
J+
K
L
M
N
O
P
S
.3750 .9062 5/16 11/16 .555 3/8 1-7/8 2-1/2 1-1/8 11/32 11/32 11/16 .035 8-32 5/16 .000
.5000
1.6250 1/2
1
.995 1/2 2-7/8 3-3/4 1-7/8 7/16 11/16 1 .062 1/4-28 7/16 .010
.6250
.7500
1/4-28
2.0000 9/16 1-1/16 1.293 1/2 3-1/4 4-1/8 2-1/4 7/16 11/16 1-1/8 .062
7/16 1/16
1.0000
10-32
Assembly*
Bearing Only
Catalog Item Catalog Item
Number Code Number Code
6906
6908
6910
6912
6916
50572
50574
50576
50578
50580
6906B
6908B
6910B
6912B
6916B
50571
50573
50575
50577
50579
*Housings do not have Catalog Numbers. To order specify bearing size-housing. Example: 6906-Housing.
+ J dimension is the overall width.
Basic
Bearing
Number
6906
6908-6910
6912
6916
P-1930-BG
04/10
50
305
735
850
1140
Radial Capacity (Lbs.)
Revolutions Per Minute
100
500
245
140
585
340
675
395
905
530
Load Data
1800
95
225
260
345
The indicated load ratings are based on 2500 hours
average life (L50). To determine the load ratings at 3500
and 5000 hours, 90 percent and 80 percent respectively,
of the above ratings should be used.
Boston Gear 800-825-6544
189
Anti-Friction Bearings
3000 Series
Radial Ball Bearings; Semi-Ground, Single Row
LOW COST INCH DIMENSIONAL BEARINGS similar
to 1600 Series in construction and dimensions and
suitable for speeds up to 2500 R.P.M.
NYLON BALL RETAINERS (TN) furnished as standard.
Steel retainers (J) available on special production order.
F
GREASE PACKED as standard on Types DC and DS.
Types SC, SS and NS can be grease packed on special
order.
NYLON SEALS more effectively retain lubricant and
exclude foreign matter.
SPECIAL FEATURES including dimensions,
tolerances, etc. available on special order.
ORDER BY CATALOG NUMBER OR ITEM CODE
Double Shield
Catalog
Item
Number
Code
Double Sealed
Catalog
Item
Number
Code
1/4
3002DS
50768
3002DC
3/8
3004DS
50770
—
—
3/8
3014DS
50774
3014DC
50755
1/2
3016DS
50776
3016DC
50757
1/2
3021DS
50778
3021DC
50758
5/8
3023DS
50779
3023DC
50759
5/8
3028DS
50780
3028DC
50760
3/4
3030DS
50781
3030DC
50761
3/4
3035DS
50783
3035DC
50763
1
3041DS
50786
3041DC
50766
Bore
50749
Seal and Shield Arrangements
DOUBLE
SEALED
DOUBLE
SHIELD
SINGLE
SEAL
SINGLE
SHIELD
NO
SHIELDS
DC
DS
SC
SS
NS
190
Boston Gear 800-825-6544
TYPES SC, SS and NS
are available via
special order only.
P-1930-BG
04/10
Anti-Friction Bearings
3000 Series
Radial Ball Bearings; Semi-Ground, Single Row
ALL DIMENSIONS IN INCHES
Basic
Bearing
Number
3002
3004
3014
3016
3021
3023
3028
3030
3035
3040
3041
Balls
A
B
C
R *
Radius
No.
Dia.
1/4
3/8
3/8
1/2
1/2
5/8
5/8
3/4
3/4
7/8
1
11/16
7/8
1/4+
9/32++
.012
.012
6
7
1/8
5/32
1-1/8
3/8
.025
7
3/16
1-3/8
7/16
.025
8
15/64
1-5/8
1/2
.025
8
1/4
1-3/4
1/2
.025
8
1/4
2
9/16
.035
10
1/4
C
F
B
A
R
*Maximum fillet on shaft or in housing which bearing corner will clear.
+ Width SC & DC = 5/16"
++ Width SC = 11/32"
STANDARD TOLERANCES
Dimensions
A
B
C
Tolerance
All
11/16-1-3/4
2
+.005 to –.000
+.0000 to –.0005
+.0000 to –.0006
All
±.005
For recommended shaft and housing fits,
see engineering section, page 238.
Basic
Bearing
Number
3002
3004
3014
3016
3021
3023
3028
3030
3035
3040
3041
P-1930-BG
50
150
250
Radial Capacity (Lbs.)
Revolutions Per Minute
100
500
1800
120
70
45
200
120
80
350
280
165
105
95
75
575
460
270
175
155
135
650
520
305
200
180
150
760
605
355
230
205
185
04/10
2500
40
70
Limiting
Thrust
(Lbs.)
30
50
Load Data
Load ratings are provided only as a guide for bearing
selection and are not to be used for life calculation.
Boston Gear 800-825-6544
191
Anti-Friction Bearings
Flanged 400F Series
Radial Ball Bearings; Unground, Single Row
FULL BALL TYPE (V) without retainer.
SUITABLE for SPEEDS up to 1200 RPM.
F
SOFT STEEL BAND on O.D. permits bearing to be
pressed in a housing without the necessity of close
housing tolerances.
E
C
F
G
STANDARD TOLERANCES
Dimensions
A
All
B
All
C
B A
D
Tolerance
+.005 to –.000
+.005 to –.000
All
±.010
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
D
E
F
G
1/4
3/8
1/2
1/2
5/8
1/2
3/4
3/4
1
11/16
29/32
1-1/8
1-3/8
1-3/8
1-1/2
1-3/4
2
2
13/65
17/64
.305
11/32
11/32
3/8
.462
13/32
13/32
3/4
1
1-1/4
1-1/2
1-1/2
1-21/32
1-15/16
2-1/8
2-1/8
1/4
.350
7/16
.475
.475
11/16
37/64
9/16
5/8
3/64
.088
.132
1/8
1/8
.320
1/8
5/32
7/32
0
.048
1/16
1/32
1/32
1/4
1/64
1/16
1/8
Load Data
Load ratings are provided only as a guide for bearing selection
and are not to be used for life calculation.
Basic
Bearing
Number
5561
5543
5368-5491
5881-5273
5327
5891
5875-5418
192
50
110
167
200
375
492
625
757
Radial Capacity (Lbs.)
Revolutions Per Minute
200
600
53
30
80
45
96
54
180
101
236
132
300
168
362
204
Boston Gear 800-825-6544
Balls
Number
Dia.
10
15
18
15
15
11
14
17
17
1/8
1/8
1/8
3/16
3/16
1/4
1/4
1/4
1/4
Catalog
Number
Item
Code
5561
5543
5491
5881
5273
5327
5891
5875
5418
50566
50565
50564
50569
50559
50561
50570
50568
50563
Typical Application
Flanged Series
1200
21
32
38
71
92
177
142
P-1930-BG
04/10
Anti-Friction Bearings
AO/SAO Series
Thrust Ball Bearings; Ground, Unbanded
Hardened Alloy Steel — AO Series
Hardened Stainless Steel — SAO Series
F
FOR LIGHT LOADS
HIGH QUALITY HARDENED STEEL BALLS, retained in
a nylon cage.
HARDENED THRUST WASHERS, are ground both
sides to provide smooth, flat, parallel ball raceway
surfaces.
QUALITY and NUMBER OF BALLS assure high load
carrying capacity.
NYLON RETAINER assures minimum frictional losses.
STANDARD TOLERANCES
Dimensions
A*
All
B
All
C
All
B
Tolerance
+.002 to +.007
+.000 to –.005
+.000 to –.010
*AO/SAO 16 +.002 to +.010
C
A
ALL DIMENSIONS IN INCHES
ORDER BY ITEM CODE (2 WASHERS AND 1 NYLON CAGE)
Balls
A
B
C
Number
Diameter
Basic
Bearing
Number
AO Series
Alloy
Washer
Nylon Cage
SAO Series
Stainless Steel
Washer
Nylon Cage
3/16
1/4
5/16
7/16
9/16
5/8
3/16
7/32
1/4
9
10
10
1/16
3/32
3/32
AO/SAO1
AO/SAO5
AO/SAO8
06724
06726
06728
56807
56808
56809
06760
06762
06764
56813
56814
56815
3/8
1/2
11/16
7/8
9/32
3/8
12
10
3/32
1/8
AO/SAO10
AO/SAO16
06730
06734
56810
56812
06766
06770
56816
56818
Load Data
The indicated load ratings are based on 2500 hours average
life (L50). To determine the load ratings at 3500 and 5000
hours, 90 percent and 80 percent respectively, of the above
ratings should be used.
Basic
Bearing
Number
P-1930-BG
04/10
50
Thrust Capacity (Lbs.)
Revolutions Per Minute
100
500
1000
AO/SAO1
AO/SAO5
AO/SAO8
30
64
68
25
56
60
14
31
34
11
25
27
AO/SAO10
AO/SAO16
85
250
72
125
42
70
32
58
Boston Gear 800-825-6544
193
Anti-Friction Bearings
600 Series
Thrust Ball Bearings; Unground, Banded
FULL BALL TYPE (V) without retainer.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
F
B
A
C
A1
STANDARD TOLERANCES
Dimensions
Tolerance
A
A1
B
All
All
All
–.000 to +.010
±.010
±.010
C
All
±.010
Balls
No. Dia.
Catalog
Number
Item
Code
.333
.359
10
14
5/32
5/32
601
602
50537
50538
55/64
1-17/64
1
.281
.437
.344
15
10
12
1/8
1/4
3/16
602-3/4
603
603-1/4
50540
50541
50542
.656
.656
1-1/8
1-27/64
.344
.456
16
12
5/32
1/4
605
606
50543
50544
.750
.875
.775
.900
1-21/32
1-57/64
.545
.594
15
17
1/4
1/4
607
608
50545
50547
1.000
1.000
1.016
1.075
1.031
1.031
2
1-31/32
1-3/4
.640
.625
.625
12
18
16
3/8
1/4
1/4
609
610
610-1/4
50548
50549
50550
1.063
1.125
1.094
1.150
1-31/32
2-3/32
.625
.625
18
19
1/4
1/4
611
613
50551
50552
1.457
1.500
1.462
1.525
2-15/32
2-19/32
.625
.625
23
25
1/4
1/4
619
621
50555
50556
A
A1
B
C
.250
.375
.275
.400
27/32
1-3/64
.453
.500
.500
.478
.525
.525
.625
.625
Load Data
Load ratings are provided only as a guide for bearing
selection and are not to be used for life calculation.
10
Thrust Capacity (Lbs.)
Crane
Revolutions Per Minute
Hook
50
100
250 500 1000
601
304
246
182
98
71
51
912
602
426
344
254
138
100
71
1277
602-3/4
603
603-1/4
292
780
526
236
630
425
174
465
314
94
252
170
68
182
123
48
129
87
873
2325
1570
605
606
487
936
394
750
291
558
158
302
114
218
81
155
1460
2790
607
608
1170 945
1326 1071
698
791
378
428
273
309
194
220
3490
3960
609
610
610-1/4
1706 1378
1404 1134
1248 1008
1017
837
744
551
454
403
398
328
291
284
233
207
5080
4190
3730
611
1404 1134
837
454
328
233
4190
613
1482 1197
883
479
346
246
4420
619
1794 1449
1069
579
419
298
5350
621
1950 1575
1162
630
455
324
5820
Bearing
Number
194
Boston Gear 800-825-6544
Crane Hook
Swivel Application
Bearing No. 605
This
standard
product
provided the exact bearing
needed by this crane hoist
manufacturer. An unground
bearing
provided
the
economy, while a full ball
complement provided the
required high thrust-load
capacity. The bearing features
a bonded non-separable
assembly that provides easy
installation and lubrication.
Special platings and stainless
steel balls are readily available
as a cost-effective way to fight
corrosion and increase service
life.
P-1930-BG
04/10
Anti-Friction Bearings
2000 Series
Ball Bearings Sheaves; Unground
NR 2000 Series are unground, of pressed steel construction with
hardened raceways. For rope, wire rope, etc. and special uses requiring
a semi-circular tread.
F
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
.166
1/4
5/16
3/8
1/2
5/8
1
B
C
1-1/4
1-21/32
2-7/8
3-1/16
3
2-3/4
2-3/4
2-3/4
2-7/8
3
3-1/16
3-5/16
4-1/16
2-7/8
4-1/16
2-3/4
3
7-1/8
D
E
9/32 7/16
3/8
5/16 7/16
3/8
17/32 1/2
1
37/64 1/2
1
19/32 3/4
1
1/2
7/16
1
1/2
9/16
1
9/16 7/16
1
17/32 1/2
1
1/2 11/16
1
37/64 1/2
1
3/4 13/16 13/16
17/32 3/4
1
11/16 13/16 13/16
17/32 3/4
1
7/16 9/16 13/16
19/32 3/4
1
13/16 5/8 1-3/8
F
H
1
1-11/32
2-9/16
2-9/16
2-5/8
2-3/8
2-3/8
2-3/8
2-9/16
2-3/8
2-9/16
2-3/8
3-9/16
2-1/4
3-9/16
2-3/16
2-5/8
6
7/32
7/32
13/32
13/32
1/2
3/8
3/8
7/16
13/32
3/8
13/32
7/16
13/32
17/32
13/32
5/16
1/2
17/32
Catalog
Number
Item
Code
NR2000
NR2006
NR2008
NR2010
NR2011
NR2012
NR2012-1
NR2013
NR2014
NR2015
NR2016
NR2017
NR2024
NR5378
NR2025
NR2018
NR2020*
NR5623
67135
67136
67137
67138
67139
67140
67141
67142
67143
67144
67145
67146
67149
67267
67150
67147
67148
67275
C
H
F
B
D
A
E
* Inner race “D” dimension not centered.
Sheave
Number
NR2000
NR2006
NR2008
NR2010
NR2011
NR2012
NR2012-1
NR2013
NR2014
NR2015
NR2016
NR2017
NR2024
NR5378
NR2025
NR2018
NR2020
NR5623
P-1930-BG
Load Data
50
Radial Load Capacity (Lbs.)
Revolutions Per Minute
100
200
300
600
900
No.
Diam.
88
62
42
34
24
19
10
1/8
300
210
144
116
81
66
14
1/4
293
208
146
121
82
70
14
1/4
300
210
144
116
81
66
14
1/4
230
164
115
95
65
55
14
1/4
300
210
144
116
81
66
14
1/4
3/16
1/4
3/16
1/4
3/16
1/4
Balls
471
334
235
194
132
112
300
210
144
116
81
66
15
14
15
14
15
293
208
146
121
82
70
19
04/10
Load ratings are provided only as a guide
for bearing selection and are not to be used
for life calculation.
STANDARD TOLERANCES
Dimensions
Tolerance
A
All
+.005 to -.000
Boston Gear 800-825-6544
195
Anti-Friction Bearings
2100 Series
Ball Bearings Sheaves; Unground
NR 2100 Series are unground, of pressed steel
construction with hardened raceways. For chain or belt
application.
F
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
D
E
F
.372 2-1/4
19/32
7/8
9/16
2-5/8
3/8 3-1/4
3-3/8
1/2
5/8 13/16 2
19/32 11/16 1
2-11/16
19/32 11/16 1
2-11/16
Catalog
No.
Item
Code
15/32
15/32 NR2105
67151
3/8
15/32
15/32
3/8 NR2106
67152
7/16 NR2111-1 67154
7/16 NR2111
67153
H
1-5/8
J
3-3/8 19/32 7/8 1
1/2 3
5/8 15/16 1
4-15/16 3/4
7/8 1
2-11/16
2-13/16
4
15/32
1/2
5/8
7/16 NR2112
1/2 NR2113
9/16 NR2118
67155
67156
67157
5/8 4-7/16
3-7/8
27/64
27/64 NR2120
67158
5/8
3/4
1
C
B
F
D
A
E
J
H
Load Data
Load ratings are provided only as a guide
for bearing selection and are not to be used
for life calculation.
Radial Load Capacity in Pounds
Revolutions Per Minute
100
200
300
600
Sheave
Number
50
NR2105
220
153
119
85
NR2106
356
247
170
327
232
NR2118
500
NR2120
293
NR2111-1
NR2111
NR2112
NR2113
Balls
900
No.
Diam.
59
48
11
3/16
137
96
78
10
1/4
163
135
92
78
10
5/16
344
240
192
134
109
14
1/4
208
146
121
82
70
14
1/4
STANDARD TOLERANCES
Dimensions
Tolerance
A
196
All
+.005 to -.000
Boston Gear 800-825-6544
P-1930-BG
04/10
Anti-Friction Bearings
2200 Series
Ball Bearings Wheels; Unground
The NR 2200 series pressed steel, ball bearing type wheels conform
to the drawings showing their tread types. NR2201, 2204 and 2205
have ball races and outer housing carefully hardened. NR 2203 and
2206 have hardened races and unhardened outer housings.
F
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
1/4
3/8
3/8
17/32
1/2
B
C
D
R
Catalog
No.
Item
Code
—
—
—
—
3/4
NR2201
NR2203
NR2204
NR2205
NR2206
67159
67160
67161
67162
67163
E
1.400 1/2
7/16 9/16
2-1/8
1/2
5/8 13/16
2-1/2 11/16 11/16 1
2-1/2 11/16 11/16 1
2-3/4 9/16 11/16 1
C
C
C
STANDARD TOLERANCES
Dimensions
Tolerance
A
All
+.005 to -.000
A
LOAD DATA*
Wheel
Number
NR2201
NR2203
NR2204
NR2205
NR2206
D
Radial Load Capacity in Pounds
Balls
Revolutions Per Minute
50 100 200 300 600 900 No. Diam.
91
66
47
37
25
23 15
1/8
230 164 115 95
65
55 15 3/16
136
100
327
232
71
56
163
135
38
34
92
14
78
14
D
E
B
D
E
B
2203
1/4
A
A
B
2201
2204
2205
1/4
E
3/4"
2206
Flanged 2300 Series Unground
The NR 2300 Series pressed steel, ball bearing type wheels are
advantageous for application to wooden rollers or steel tubes, pipes,
etc. The flange serves as an economical method of locating the roller
in its nest. The ball races are carefully hardened while the outer housing is unhardened.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
A
B
C
D
EF
G
Catalog
No. Code
H
C
F
B
Item
3/8 2
1/2 11/16 9/16 1.875 1.875 7/16 NR2308 67165
3/8 2-1/4 9/16 3/4
9/16 1.625 1.625 1/2 NR2312+ 67166
1/2 3
9/16 15/16 1
2.781 2.810 1/2 NR2324 67167
A
D
G
E
+Screw holes in Flange, for application to Wood Rollers.
STANDARD TOLERANCES
Dimensions
Tolerance
A
All
+.005 to -.000
LOAD DATA*
Wheel
Number
Radial Load Capacity in Pounds
Revolutions Per Minute
50
100
200
300 600 900
No. Diam.
NR2308
NR2312
NR2324
77
220
327
15
15
14
P-1930-BG
04/10
56
153
232
40
119
163
32
85
135
21
59
92
19
48
78
Balls
1/8
1/8
1/4
H
*Load ratings are provided only as a guide for bearing
selection and are not to be used for life calculation.
Boston Gear 800-825-6544
197
Self-Aligning Bearings
KF Female Series
Rod Ends – Economical
W
D
H
45° WITH
BALL STUD
F
B
CONE ANGLE
O
30° WITH
BALL ONLY
FF
AN “L”
DESIGNATES
LEFT HAND
THREAD
AF
J
SPECIFICATIONS
ALL DIMENSIONS IN INCHES
Bore
B
Outer
Low carbon steel stamping
Member plated for corrosion resistance
Low carbon steel, case
hardened plated for corrosion
resistance and wear
Ball
+.0025
–.0005
.1900
.2500
.3125
.3750
.5000
LOAD DATA
Basic
Bearing
Number
3
4
5
6
8
Ultimate Static
Load (Radial)
Rating (Lbs.)
1,000
1,900
2,300
3,000
6,100
W
H
AF
FF
D
J
O
Ball
Dia.
±.005 REF
±.060 ±.030
±.030
REF
REF
REF
.312
.375
.437
.500
.625
.500
.687
.687
.875
1.125
.750
.850
1.015
1.125
1.470
.450
.515
.590
.725
1.010
.296
.346
.438
.508
.690
.430
.510
.618
.713
.931
.250
.287
.305
.400
.500
1.062
1.312
1.375
1.625
2.125
Thread
Class
UNF-2
10-32
1/4-28
5/16-24
3/8-24
1/2-20
ORDER BY CATALOG NUMBER OR ITEM CODE
Approx.
Wt.
(Lbs.)
.02
.04
.07
.11
.23
Bore
Right Hand
Catalog
Item
Number
Code
Left Hand
Catalog
Item
Number
Code
.1900
.2500
.3125
.3750
.5000
KF-3
KF-4
KF-5
KF-6
KF-8
KFL-3
KFL-4
KFL-5
KFL-6
KFL-8
65001
65002
65041
65042
65069
65070
65140
65141
65142
65252
NOTES: To order with optional studs, add letters “Y” or “S” to suffix. For stud specifications, see Page 211.
For Engineering Data, see Pages 207-211.
198
Boston Gear 800-825-6544
P-1930-BG
04/10
Self-Aligning Bearings
HM-C Male/HF-C Female Series
Rod Ends – Commercial
W
W
D
H
H
D
B
B
O
F
Q
O
FF
APPROX.
LOCATION OF
LUBRICATOR
IF REQD.
Q
AF
GROOVE DEPICTS
LEFT HAND THREAD
FM
AM
G
DIA
E
ACROSS FLATS
MALE
FEMALE
ALL DIMENSIONS IN INCHES
Bore
B
W
H
AM
FM
AF
FF
D
G
E
O
Ball
Dia.
Q
Thread
+.0025
-.0005
±.005
REF
±.060
±.030
±.060
±.030
±.010
REF
REF
REF
REF
REF
Class
UNF-2
.1900
.312
.250
.750
1.250
.562
1.062
.750
.406
.312
.296
.430 ±5-1/2°
10-32
.750
.468
.375
.346
.510 ±6-1/2°
1/4-28
1
.2500
.375
.281
1.000
1.562
.750
1.312
.3125
.437
.344
1.250
1.875
.750
1.375
.875
.500
.437
.438
.618 ±5-1/2°
5/16-24
.3750
.500
.406
1.250
1.938
.937
1.625
1.000
.687
.562
.508
.713
±5°
3/8-24
.4375
.562
.437
1.375
2.125
1.062
1.812
1.125
.750
.625
.578
.806
±6°
7/16-20
.5000
.625
.500
1.500
2.438
1.187
2.125
1.312
.875
.750
.690
.931
±5°
1/2-20
.6250
.750
.562
1.625
2.625
1.500
2.500
1.500
1.000
.875
.801
1.098
±6°
5/8-18
.7500
.875
.687
1.750
2.875
1.750
2.875
1.750
1.125
1.000
1.010
1.336
±5°
3/4-16
+Tolerance +.015/–.010
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
Right Hand
With
Without
Lubricator
Lubricator
Catalog Item
Catalog Item
Number Code
Number Code
MALE TYPE
.1900
—
.2500
HM-4CG
.3125
HM-5CG
.3750
HM-6CG
.4375
HM-7CG
.5000
HM-8CG
.6250
HM-10CG
.7500
HM-12CG
FEMALE TYPE
.1900
—
.2500
HF-4CG
.3125
HF-5CG
.3750
HF-6CG
.4375
HF-7CG
.5000
HF-8CG
.6250
HF-10CG
.7500
HF-12CG
SPECIFICATIONS
Left Hand
With
Without
Lubricator
Lubricator
Catalog
Item
Catalog Item
Number
Code Number Code
—
48201
48202
48203
48204
48205
48206
48207
HM-3C
HM-4C
HM-5C
HM-6C
HM-7C
HM-8C
HM-10C
HM-12C
48193
48194
48195
48196
48197
48198
48199
48200
—
HML-4CG
HML-5CG
HML-6CG
HML-7CG
HML-8CG
HML-10CG
HML-12CG
—
48216
48217
48218
48219
48220
48221
48222
HML-3C
HML-4C
HML-5C
HML-6C
HML-7C
HML-8C
HML-10C
HML-12C
48208
48209
48210
48211
48212
48213
48214
48215
—
48171
48172
48173
48174
48175
48176
48177
HF-3C
HF-4C
HF-5C
HF-6C
HF-7C
HF-8C
HF-10C
HF-12C
48163
48164
48165
48166
48167
48168
48169
48170
—
HFL-4CG
HFL-5CG
HFL-6CG
HFL-7CG
HFL-8CG
HFL-10CG
HFL-12CG
—
48186
48187
48188
48189
48190
48191
48192
HFL-3C
HFL-4C
HFL-5C
HFL-6C
HFL-7C
HFL-8C
HFL-10C
HFL-12C
48178
48179
48180
48181
48182
48183
48184
48185
Outer
Low carbon steel plated for
Member corrosion resistance
Ball
Case hardened steel plated for
corrosion resistance and wear
Insert
Oil impregnated sintered bronze
LOAD DATA
Ultimate Static
Basic
Load (Radial)
Bearing Rating (Lbs.)
Number Male Female
3
1,600
1,800
4
2,250
2,300
5
2,850
2,900
6
3,900
4,300
7
5,300
5,350
8
7,400
8,400
10
9,350
9,550
12
10,450 10,500
Approx.
Wt. (Lbs.)
Male Female
.04 .04
.05 .06
.08 .09
.12 .16
.17 .20
.27 .32
.40 .48
.72 .72
NOTES:
To order with optional studs, add letter “Y” or "S" to suffix. For stud specifications, see Page 211.
Lubricators available on sizes 4 through 12 only, studs available on all sizes.
For Engineering Data, see Pages 207-211.
P-1930-BG
04/10
Boston Gear 800-825-6544
199
Self-Aligning Bearings
CMHD Male/CFHD Female Series
Rod Ends – Commercial; Self Lubricating
W
D
H
W
H
D
B
F
O
Q
B
O
FF
APPROX.
LOCATION OF
LUBRICATOR
IF REQD.
Q
AF
GROOVE DEPICTS
LEFT HAND THREAD
FM
AM
G
DIA
E
ACROSS FLATS
MALE
FEMALE
ALL DIMENSIONS IN INCHES
Bore
B
+.0025
-.0005
.1900
.2500
.3125
.3750
.4375
.5000
.6250
.7500
W
H
AM
FM
AF
FF
D
G
E
O
Ball
Dia.
±.005
REF
±.060
±.030
±.060
±.030
±.010
REF
REF
REF
REF
.312
.375
.437
.500
.562
.625
.750
.875
.250
.281
.344
.406
.437
.500
.562
.687
.750
1.000
1.250
1.250
1.375
1.500
1.625
1.750
1.250
1.562
1.875
1.938
2.125
2.438
2.625
2.875
.562
.750
.750
.937
1.062
1.187
1.500
1.750
1.062
1.312
1.375
1.625
1.812
2.125
2.500
2.875
.625
.750
.875
1.000
1.125
1.312
1.500
1.750
.406
.468
.500
.687
.750
.875
1.000
1.125
.312
.375
.437
.562
.625
.750
.875
1.000
.296
.346
.438
.508
.578
.690
.801
1.010
.430
.510
.618
.713
.806
.931
1.098
1.336
SPECIFICATIONS
Ball
Case hardened steel electroless
nickel plated
Insert
Reinforced nylon
LOAD DATA
Basic
Bearing
Number
3
4
5
6
7
8
10
12
Q
Class
REF
UNF-2
10-32
±6°
1/4-28
±7°
5/16-24
±6°
3/8-24 ±5-1/2°
7/16-20
±6°
1/2-20
±5°
5/8-18 ±7-1/2°
3/4-16
±6°
ORDER BY CATALOG NUMBER OR ITEM CODE
Outer
Low carbon steel plated for
Member corrosion resistance
Ultimate Static
Load (Radial)
Rating (Lbs.)
Male
Female
1,150
1,200
1,600
1,650
2,700
2,800
3,200
3,250
3,750
3,800
5,800
6,400
7,050
7,100
8,800
9,000
Thread
Approx.
Wt.
(Lbs.)
.02
.04
.07
.11
.15
.23
.38
.58
Bore
Right Hand
Catalog
Item
Number
Code
MALE TYPE
.1900
CMHD-3
.2500
CMHD-4
.3125
CMHD-5
.3750
CMHD-6
.4375
CMHD-7
.5000
CMHD-8
.6250
CMHD-10
.7500
CMHD-12
FEMALE TYPE
.1900
CFHD-3
.2500
CFHD-4
.3125
CFHD-5
.3750
CFHD-6
.4375
CFHD-7
.5000
CFHD-8
.6250
CFHD-10
.7500
CFHD-12
Left Hand
Catalog
Number
Item
Code
48307
48308
48309
48310
48311
48312
48313
48314
CMHDL-3
CMHDL-4
CMHDL-5
CMHDL-6
CMHDL-7
CMHDL-8
CMHDL-10
CMHDL-12
48315
48316
48317
48318
48319
48320
48321
48322
48291
48292
48293
48294
48295
48296
48297
48298
CFHDL-3
CFHDL-4
CFHDL-5
CFHDL-6
CFHDL-7
CFHDL-8
CFHDL-10
CFHDL-12
48299
48300
48301
48302
48303
48304
48305
48306
NOTES:
To order with optional studs, add letter “Y” or "S" to suffix. For stud specifications, see Page 211.
For Engineering Data, see Pages 207-211.
200
Boston Gear 800-825-6544
P-1930-BG
04/10
Self-Aligning Bearings
HM Males/HF Female Series
Rod Ends – Precision
W
W
D
H
H
D
B
B
O
Q
O
FF
Q
APPROX.
LOCATION OF
LUBRICATOR
IF REQD.
F
AF
GROOVE DEPICTS
LEFT HAND THREAD
FM
AM
G
DIA
E
ACROSS FLATS
MALE
FEMALE
ALL DIMENSIONS IN INCHES
Bore
B
+.0015
-.0005
.1900
.2500
.3125
.3750
.4375
.5000
.6250
.7500
1.0000
W
H
AM
FM
±.005
REF
±.060
±.030
.312
.375
.437
.500
.562
.625
.750
.875
1.375
.250
.281
.344
.406
.437
.500
.562
.687
1.000
.750
1.000
1.250
1.250
1.375
1.500
1.625
1.750
2.125
1.250
1.562
1.875
1.938
2.125
2.438
2.625
2.875
4.125
(1) Tolerance +.015/–.010
D
G
E
O
Ball
Dia.
Q
±.060 ±.030
±.010
REF
REF
REF
REF
REF
.562
.750
.750
.937
1.062
1.187
1.500
1.750
2.125
.750
.406
.750(1)
.468
.875
.500
1.000
.687
1.125
.750
1.312
.875
1.500
1.000
1.750
1.125
(2)
2.750
1.625
.312
.375
.437
.562
.625
.750
.875
1.000
1.500
.296
.346
.438
.508
.578
.690
.801
1.010
1.269
.430 ±5-1/2°
.510 ±6-1/2°
.618 ±5-1/2°
.713
±5°
.806
±6°
.931
±5°
1.098
±6°
1.336
±5°
1.875
7°
AF
(2) Tolerance +.030/–.010
FF
1.062
1.312
1.375
1.625
1.812
2.125
2.500
2.875
4.125
(3) Tolerance +.000/–.005
SPECIFICATIONS
Left Hand
With
Lubricator
Catalog
Item
Number Code
Class
UNF-2
10-32
1/4-28
5/16-24
3/8-24
7/16-20
1/2-20
5/8-18
3/4-16
1-1/4-12(4)
(4) Class 3 Threads
ORDER BY CATALOG NUMBER OR ITEM CODE
Right Hand
With
Without
Lubricator
Lubricator
Bore
Catalog Item
Catalog Item
Number Code Number Code
MALE TYPE
.1900
—
—
HM-3
48259
.2500 HM-4G 48267 HM-4
48260
.3125 HM-5G 48268 HM-5
48261
.3750 HM-6G 48269 HM-6
48262
.4375 HM-7G 48270 HM-7
48263
.5000 HM-8G 48271 HM-8
48264
.6250 HM-10G 48272 HM-10 48265
.7500 HM-12G 48273 HM-12 48266
1.0000 HM-16G 48103 HM-16 48102
FEMALE TYPE
.1900
—
—
HF-3
48225
.2500 HF-4G 48233 HF-4
48226
.3125 HF-5G 48234 HF-5
48227
.3750 HF-6G 48235 HF-6
48228
.4375 HF-7G 48236 HF-7
48229
.5000 HF-8G 48237 HF-8
48230
.6250 HF-10G 48238 HF-10
48231
.7500 HF-12G 48239 HF-12
48232
1.0000 HF-16G 48105 HF-16
48104
Thread
Sizes 3 - 12
Without
Lubricator
Catalog
Item
Number Code
—
HML-4G
HML-5G
HML-6G
HML-7G
HML-8G
HML-10G
HML-12G
HML-16G
—
48284
48285
48286
48287
48288
48289
48290
48107
HML-3
HML-4
HML-5
HML-6
HML-7
HML-8
HML-10
HML-12
HML-16
48276
48277
48278
48279
48280
48281
48282
48283
48106
—
HFL-4G
HFL-5G
HFL-6G
HFL-7G
HFL-8G
HFL-10G
HFL-12G
HFL-16G
—
48250
48251
48252
48253
48254
48255
48256
48109
HFL-3
HFL-4
HFL-5
HFL-6
HFL-7
HFL-8
HFL-10
HFL-12
HFL-16
48242
48243
48244
48245
48246
48247
48248
48249
48108
Size 16
Outer
Low carbon steel plated for
Member corrosion resistance
Ball
Case hardened
steel for corrosion
resistance and
wear
52100 steel heat
treated plated
for corrosion
resistance
Insert
Oil impregnated
sintered bronze
Low carbon
steel plated
for corrosion
resistance
LOAD DATA
Ultimate Static
Basic
Load (Radial)
Bearing
Rating (Lbs.)
Number Male
Female
3
1,600
1,800
4
2,250
2,300
5
2,850
2,900
6
3,900
4,300
7
5,300
5,350
8
7,400
8,400
10
9,350
9,550
12
10,450 10,500
16
43,540 43,540
Approx.
Wt.
(Lbs.)
Male Female
.04
.04
.05
.06
.08
.09
.12
.16
.17
.20
.27
.32
.40
.48
.62
.72
2.41
2.13
NOTES:
To order with optional studs, add letter “Y” or “S” to suffix. For stud specifications, see Page 211.
Lubricators available on sizes 4 through 16 only, studs available on sizes 3 through 12 only.
For Engineering Data, see Pages 207-211.
P-1930-BG
04/10
Boston Gear 800-825-6544
201
Self-Aligning Bearings
HME Male/HFE Female Series
Rod Ends – Precision; Self Lubricating
W
D
W
D
H
H
Q
Q
O
O
F
B
B
TEFLON®
FABRIC
LINER
FF
TEFLON®
FABRIC
LINER
FM
.070 DIA
J
AF
AM
N
K
MALE
FEMALE
ALL DIMENSIONS IN INCHES
Bore
B
W
H
AM
FM
AF
+ .0015 +.000
±.005
–.0005 –.005
.1900
.312 .250
.2500
.375 .281
.3125
.437 .344
.3750
.500 .406
.4375
.562 .437
.5000
.625 .500
.6250
.750 .562
.7500
.875 .687
1.0000 1.375 1.000(1)
+.060
–.030
.750
1.000
1.250
1.250
1.375
1.500
1.625
1.750
2.125
(1) Tolerance +.015/–.010
(2) Tolerance +.030/–.010
±.010
1.250
1.562
1.875
1.938
2.125
2.438
2.625
2.875
4.125
SPECIFICATIONS
Outer
Low carbon steel plated for corrosion
Member resistance
Ball
52100 Steel - heat treated Rc 56 Min
hard chrome plated
Insert
Carbon steel - plated for corrosion
resistance or stainless steel
Liner
Teflon® fabric permanently bonded
to insert I.D.
Teflon® is a trade name of E.I. DuPont de Nemours & Co. Inc.
LOAD DATA
Basic
Bearing
Number
3
4
5
6
7
8
10
12
16
Ultimate Static
Load (Radial)
Rating (Lbs.)
Male
Female
1,169
1,531
2,158
2,539
2,784
3,133
3,915
3,915
4,218
4,218
6,660
6,660
7,364
7,364
11,518 11,518
43,540 43,540
Approx.
Wt.
(Lbs.)
Male Female
.03
.04
.04
.06
.08
.09
.12
.16
.16
.20
.25
.32
.39
.48
.60
.72
2.41
2.13
NOTE:
For Engineering Data, see Pages 207-211.
202
Boston Gear 800-825-6544
+.060
–.030
.562
.750
.750
.937
1.062
1.187
1.500
1.750
2.125
FF
D
O
J
K
±.010
±.010
REF
±.010
±.010
1.062
1.312
1.375
1.625
1.812
2.125
2.500
2.875
4.125
.625
.750
.875
1.000
1.125
1.312
1.500
1.750
2.750(2)
.306
.331
.447
.517
.586
.656
.832
.978
1.269
.312
.375
.437
.562
.625
.750
.875
1.000
1.500
.406
.468
.500
.687
.750
.875
1.000
1.125
1.625
Ball
Dia.
N
+.000
–.005
.312
.312
.406
.469
.531
594
.750
.875
—
Q
Thread
Class
UNF-3
.406 ±6-1/2° 10-32
.500
±8°
1/4-28
.625
±7° 5/16-24
.713
±6°
3/8-24
.813
±7° 7/16-20
.906
±6°
1/2-20
1.125
±8°
5/8-18
1.312
±7°
3/4-16
1.875
±7° 1-1/4-12
REF
REF
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
Right Hand
Catalog
Item
Number
Code
Left Hand
Catalog
Number
Item
Code
HME-3
HME-4
HME-5
HME-6
HME-7
HME-8
HME-10
HME-12
HME-16
48038
48039
48040
48041
48043
48044
48045
48046
48047
HMLE-3
HMLE-4
HMLE-5
HMLE-6
HMLE-7
HMLE-8
HMLE-10
HMLE-12
HMLE-16
48059
48063
48065
48067
48068
48069
48076
48077
48078
HFE-3
HFE-4
HFE-5
HFE-6
HFE-7
HFE-8
HFE-10
HFE-12
HFE-16
48079
48080
48086
48088
48091
48093
48094
48095
48096
HFLE-3
HFLE-4
HFLE-5
HFLE-6
HFLE-7
HFLE-8
HFLE-10
HFLE-12
HFLE-16
48004
48006
48007
48008
48010
48012
48014
46017
48019
MALE TYPE
.1900
.2500
.3125
.3750
.4375
.5000
.6250
.7500
1.0000
FEMALE TYPE
.1900
.2500
.3125
.3750
.4375
.5000
.6250
.7500
1.000
P-1930-BG
04/10
Self-Aligning Bearings
HMX Male/HFX Female Series
Rod Ends – Extra Capacity
W
W
D
D
H
H
Q
Q
O
B
O
TEFLON
FABRIC
LINER
FM
®
FF
J
F
B
APPROX.
LOCATION OF
LUBRICATOR
.070 DIA.
AM
AF
N
K
MALE
FEMALE
ALL DIMENSIONS IN INCHES
Bore
B
W
+.0015
–.0005
.2500
.3125
.3750
.4375
.5000
.6250
.7500
.7500
+.000
–.005
.375
.437
.500
.562
.625
.750
.875
.875
H
±.005
.281
.344
.406
.437
.500
.562
.687
.687
AM
+.060
–.030
1.000
1.250
1.250
1.375
1.500
1.625
1.750
1.750
FM
±.010
1.562
1.875
1.938
2.125
2.438
2.625
2.875
2.875
AF
+.060
–.030
.750
.750
.937
1.062
1.187
1.500
1.750
1.750
FF
D
O
J
K
±.010
±.010
REF
±.010
±.010
1.312
1.375
1.625
1.812
2.125
2.500
2.875
2.875
.750
.875
1.000
1.125
1.312
1.500
1.750
1.750
.331
.447
.517
.586
.656
.832
.978
.978
.375
.437
.562
.625
.750
.875
1.000
1.000
.468
.500
.687
.750
.875
1.000
1.125
1.125
Bore
Left Hand
with Lubricator
Catalog
Item
Number
Code
MALE TYPE
.2500
HMX-4G
.3125
HMX-5G
.3750
HMX-6G
.4375
HMX-7G
.5000
HMX-8G
.6250
HMX-10G
.7500
HMX-12G
FEMALE TYPE
.2500
HFX-4G
.3125
HFX-5G
.3750
HFX-6G
.4375
HFX-7G
.5000
HFX-8G
.6250
HFX-10G
.7500
HFX-12G
NOTE
For Engineering Data, see Pages 207-211.
P-1930-BG
04/10
+.000
–.005
.312
.406
.469
.531
.594
.750
.875
.875
Q
REF REF
.500
.625
.718
.813
.906
1.125
1.312
1.312
±8°
±7°
±6°
±7°
±6°
±8°
±7°
±7°
Female Male
Thread Thread
Class Class
UNF-3B UNF-3A
1/4-28 5/16-24
5/16-24 3/8-24
3/8-24 7/16-20
7/16-20 1/2-20
1/2-20 5/8-18
5/8-18 3/4-16
3/4-16 7/8-14
3/4-16 7/8-14
SPECIFICATIONS
ORDER BY CATALOG NUMBER OR ITEM CODE
Right Hand
with Lubricator
Catalog
Item
Number
Code
Ball
Dia.
N
48337
48338
48339
48340
48341
48342
48343
HMXL-4G
HMXL-5G
HMXL-6G
HMXL-7G
HMXL-8G
HMXL-10G
HMXL-12G
48344
48345
48346
48347
48348
48349
48350
48323
48324
48325
48326
48327
48328
48329
HFXL-4G
HFXL-5G
HFXL-6G
HFXL-7G
HFXL-8G
HFXL-10G
HFXL-12G
48330
48331
48332
48333
48334
48335
46336
HMX Series
Alloy steel, heat
treated magnetic
Outer
particle inserted
Member plated for corrosion
resistance
Ball
Insert
HFX Series
Steel alloy, heat
treated plated
for corrosion
resistance
52100 steel heat
treated, hard
chrome plated
52100 steel heat
treated, hard
chrome plated
Aluminum bronze
Alloy steel, heat
treated plated
for corrosion
resistance or
stainless steel,
heat treated
LOAD DATA
Basic Ultimate Static Load
(Radial) (Lbs.)
Bearing
Number
Male
Female
4
5,390
6,190
5
7,500
7,639
6
9,590
9,544
7
11,000
10,285
8
13,575
16,238
10
17,300
17,955
12
23,225
28,081
Approx.
Wt. (Lbs.)
Male Female
.06
.06
.09
.09
.13
.15
.18
.20
.30
.32
.46
.48
.72
.72
Boston Gear 800-825-6544
203
Self-Aligning Bearings
LHA-LHB-LHSS Series
Sphericals – Precision
LUBRICATION
GROOVES
W
F
B
O
D
45°
F
LUBRICATION
HOLES (2)
SPECIFICATIONS
LHB
LHA
4130 Steel or equal
Outer
heat treated
Member plated for corrosion
resistance
T
LHSS
Aluminum
Bronze
410 or equal
Stainless
Steel
52100 Steel heat treated, plated for corrosion
resistance and wear
Ball
ORDER BY CATALOG NUMBER OR ITEM CODE
ALL DIMENSIONS IN INCHES
Bore
B
D
+.0000
–.0005
.1650
.1900
.2500
.3125
.3750
.4375
.5000
.5625
.6250
.7500
.8750
1.0000
+.0000
–.0005
.4687
.5625
.6562
.7500
.8125
.9062
1.0000
1.0937
1.1875
1.4375
1.5625
1.7500
F
T
W
O
Ball
Dia.
REF
±.005
±.005
REF
REF
.020
.020
.022
.032
.032
.032
.032
.032
.032
.044
.044
.044
.187
.218
.250
.281
.312
.343
.390
.437
.500
.593
.703
.797
.250
.281
.343
.375
.406
.437
.500
.562
.625
.750
.875
1.000
.235
.293
.364
.419
.517
.572
.642
.670
.739
.920
.980
1.118
.343
.406
.500
.562
.656
.718
.813
.906
.968
1.187
1.312
1.500
LHA Series
LHB Series
LHSS Series
Catalog
Number
Item
Code
Catalog
Number
Item
Code
Catalog
Number
Item
Code
LHA-2
LHA-3
LHA-4
LHA-5
LHA-6
LHA-7
LHA-8
LHA-9
LHA-10
LHA-12
LHA-14
LHA-16
48405
48406
48407
48408
48409
48410
48411
48412
48413
48414
48415
48416
LHB-2
LHB-3
LHB-4
LHB-5
LHB-6
LHB-7
LHB-8
LHB-9
LHB-10
LHB-12
LHB-14
LHB-16
48417
48418
48419
48420
48421
48422
48423
48424
48425
48426
48427
48428
LHSS-2
LHSS-3
LHSS-4
LHSS-5
LHSS-6
LHSS-7
LHSS-8
LHSS-9
LHSS-10
LHSS-12
LHSS-14
LHSS-16
48429
48430
48431
48432
48433
48434
48435
48436
48437
48438
48439
48440
LOAD DATA
Basic
Bearing
Number
NOTES:
For Engineering Data, see Pages 207-211.
For Housing Bores, see Page 210.
204
Boston Gear 800-825-6544
2
3
4
5
6
7
8
9
10
12
14
16
Maximum Static
Radial Load (Lbs.)
LHA/LHSS
LHB
2,000
5,400
8,400
11,600
15,600
18,600
22,400
30,000
40,000
50,000
86,000
104,000
1,000
2,700
4,200
5,800
7,800
9,300
11,200
15,000
20,000
30,000
43,000
52,000
Approx.
Weight
(Lbs.)
.01
.02
.02
.03
.04
.05
.07
.09
.11
.21
.27
.39
P-1930-BG
04/10
Self-Aligning Bearings
LHSSE-LHSSVV Series
Sphericals – Precision; Self Lubricating
LUBRICATION
GROOVES
W
F
B
O
D
45°
F
LUBRICATION
HOLES (2)
T
ORDER BY CATALOG NUMBER OR ITEM CODE
ALL DIMENSIONS IN INCHES
Bore
B
O
+.0000
–.0005
.1650
.1900
.2500
.3125
.3750
.4375
.5000
.5625
.6250
.7500
.8750
1.0000
REF
.235
.293
.364
.419
.517
.572
.642
.670
.739
.920
.980
1.118
D
+.0000
–.0005
.4687
.5625
.6562
.7500
.8125
.9062
1.0000
1.0937
1.1875
1.4375
1.5625
1.7500
F
T
REF
±.005
.020
.020
.022
.032
.032
.032
.032
.032
.032
.044
.044
.044
.187
.218
.250
.281
.312
.343
.390
.437
.500
.593
.703
.797
W
+.000
–.005
.250
.281
.343
.375
.406
.437
.500
.562
.625
.750
.875
1.000
LHSSE Series
Catalog
Item
Catalog
Item
REF
Number
Code
Number
Code
LHSSE-2
LHSSE-3
LHSSE-4
LHSSE-5
LHSSE-6
LHSSE-7
LHSSE-8
LHSSE-9
LHSSE-10
LHSSE-12
LHSSE-14
LHSSE-16
48021
48023
48025
48027
48029
48030
48032
48033
48034
48035
48036
48037
LHSSVV-2
LHSSVV-3
LHSSVV-4
LHSSVV-5
LHSSVV-6
LHSSVV-7
LHSSVV-8
LHSSVV-9
LHSSVV-10
LHSSVV-12
LHSSVV-14
LHSSVV-16
48453
48454
48455
48456
48457
48458
48459
48460
48461
48462
48463
48464
.343
.406
.500
.562
.656
.718
.813
.906
.968
1.187
1.312
1.500
SPECIFICATIONS
LOAD DATA
Basic
Bearing
Number
2
3
4
5
6
7
8
9
10
12
14
16
P-1930-BG
LHSSE
LHSSVV
Approx.
Wt.
(Lbs.)
1,200
3,250
4,900
6,450
8,250
10,200
13,600
15,900
21,000
30,000
41,100
54,700
1,200
3,250
4,900
6,450
8,250
10,200
13,600
15,900
21,000
30,000
41,100
54,700
.010
.014
.022
.03
.04
.05
.07
.09
.11
.21
.26
.39
Maximum Static Radial Load (Lbs.)
04/10
LHSSVV Series
Ball
Dia.
LHSSE Series
LHSSVV Series
Outer Member
410 Stainless Steel
410 Stainless Steel
Ball
52100 Steel
heat treated plated
for corrosion resistance
and wear
52100 Steel
heat treated plated
for corrosion resistance
and wear
Self Lubricating
Teflon®
Liner
Teflon® Fabric
Teflon® is a trade name of E. I. DuPont de Nemours & Co. Inc.
NOTES:
For Engineering Data, see Pages 207-211.
Boston Gear 800-825-6544
205
Self-Aligning Bearings
LS/LSS Series
Sphericals – Special Purpose
D
D
W
W
H
H
F
O
O
B
B
LUBRICATION
GROOVE AROUND
BALL
C x 45°
CHAMBER
LS/LSS 3 – 10
C x 45°
CHAMBER
LS 12 – 30
ORDER BY CATALOG NUMBER OR ITEM CODE
ALL DIMENSIONS IN INCHES
Bore
D
H
w
B
.+.0025 +.0000 ±.005 ±.005
–.0005 –.0005
Ball
Dia.
O
REF
REF
C
LS Series
SPECIFICATIONS
+.015 Catalog Item
–.000 Number Code
.1900
.6250
.187
.281
.400
.285
.016
LS-3
48381
.2500
.7500
.281
.375
.510
.346
.016
LS-4
48382
.3125
.8750
.313
.437
.618
.438
.016
LS-5
48383
.3750
1.0000
.375
.500
.713
.508
.016
LS-6
48384
.4375
1.1875
.437
.562
.806
.578
.032
LS-7
48385
.5000
1.3125
.531
.687
.931
.627
.044
LS-8
48386
.6250
1.5625
.687
.875
1.178
.789
.044
LS-10
48387
.7500
2.2500
.937
1.250
1.625
1.038
.044
LS-12
48388
1.0000
2.3750
.875
1.125
1.750
1.345
.062
LS-16
48389
1.1875
2.6250 1.000 1.250
2.000
1.562
.085
LS-19
48390
1.5000
3.2500 1.250 1.500
2.500
2.000
.085
LS-24
48391
1.8750
4.0000 1.313 1.625
3.000
2.521
.125
LS-30
48392
Bore
Ball
D
H
w
O
C
LSS Series
B
Dia.
.+.0000 +.0000 ±.005 ±.000 (REF) (REF) +.000 Catalog Item
–.0005 –.0005 -.005 -.000
–.005 Number Code
.1900
.5625
.218
.281
.406
.293
.020
LSS-3
48394
.2500
.6562
.250
.343
.500
.364
.022
LSS-4
48395
.3125
.7500
.281
.375
.562
.419
.032
LSS-5
48396
.3750
.8125
.312
.406
.656
.517
.032
LSS-6
48397
.4375
.9062
.343
.437
.718
.572
.032
LSS-7
48398
.5000
1.0000
.390
.500
.813
.642
.032
LSS-8
48399
.5625
1.0937
.437
.562
.906
.670
.032
LSS-9
48400
.6250
1.1875
.500
.625
.968
.739
.032
LSS-10
48401
.7500
1.4375
.593
.750
1.187
.920
.044
LSS-12
48402
.8750
1.5625
.703
.875
1.312
.980
.044
LSS-14
48403
1.0000
1.7500
.797
1.000
1.500 1.118
.044
LSS-16
48404
LS Series
Size 3 - 10
Size 12 - 30
Outer
Member
LSS Series
All
Low carbon
Carbon steel,
4130 Steel or
steel, plated for
cadmium or zinc equal, RC 36-42
corrosion resistance
plated
cadmium plated
Ball
Low carbon steel,
case hardened,
plated for corrosion
Chrome steel
heat treated
S.A.E. 52100
Steel heat treated
and chrome plated
Insert
Sintered Bronze
Oil impregnated
Brass
None
LOAD DATA
LS SERIES
LSS SERIES
Basic Maximum Static
Maximum Static
Bearing Radial Load Approx. Radial Load Approx.
in Lbs.
Wt.(Lbs.)
in Lbs.
Wt.(Lbs.)
Number
3
1,520
.02
5,400
.014
4
2,900
.04
8,400
.022
5
3,900
.05
11,600
.030
6
5,400
.08
15,600
.038
7
7,100
.12
18,600
.048
8
9,900
.18
22,400
.065
9
30,000
.086
10
16,300
.33
40,000
.110
12
47,600
.94
50,000
.204
14
86,000
.263
16
48,200
1.00
104,000
.386
19
63,000
1.27
24
98,000
2.38
30
123,000
3.75
NOTES:
For Engineering Data, see Pages 207-211.
206
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Engineering Data
F
Environment and Mounting
Caution:
Corrosive Environments
The lubricator mounting hole in housings reduces the
strength of housings by varying amounts depending on
size and location.
All components are protected by plating or corrosion
inhibiting oil.
Lubrication and Contaminants
The rating of all series with metal-on-metal bearing
members is based on the presence of an adequate
lubricant film. Ratings for the Reinforced Nylon race
series are based on dry operation with the inherent
lubrication provided by the bronze ball.
A controlled internal clearance is present in all metal-onmetal bearings. The reinforced Nylon race series are
molded with a positive interference fit-up which
excludes contaminants and results in an excellent selfwiping action.
Protection from contaminants should be provided
wherever possible. Grease fittings or lubricant entry
provisions are available for most metal-on-metal
bearings. Periodic relubrication will improve operation
under severe conditions. Contaminants are also flushed
out during relubrication. Where relubrication is difficult
or impractical, the self-lubricating features of the
sintered ball or race materials and the reinforced Nylon
race provide built-in protection.
P-1930-BG
04/10
Mounting
Sintered bronze balls may be distorted by excessive
clamping pressure. Care should be used in tightening a
nut against the ball to prevent distortion or binding.
Caution: certain ANSI bolt series with fillets under the
head will interfere with proper assembly. Use of a
countersunk washer is suggested.
Temperature and Water Immersion
Self Aligning bearings may be operated between –30°F
and +300°F, with wider ranges obtained by the use of
special lubricants. Reinforced nylon race bearings may
be operated between –30°F and +150°F. Prolonged
immersion of Nylon races in water can cause an
increase in torque.
Boston Gear 800-825-6544
207
Engineering Information
Engineering Data
Mounting and Misalignment Factors
F
The single biggest reason rod end bearings are used is
for their ability to absorb gross misalignment and still
transmit motion in the preferred direction. To overcome
misalignment, the ball or housing rotates as far as
necessary or until it strikes an obstruction. The amount of
misalignment a bearing can absorb is limited by the
mounting arrangement. Shown below are common
mounting arrangements, along with an indication of the
misalignment absorbing capabilities of each. The table
lists the maximum angular displacement in each
mounting mode.
Adding a standoff washer with the same diameter as the
ball face increases misalignment absorbing capability. The
limit is reached when the washer strikes the face.
The greatest misalignment compensation results when
the ball is fitted with a stud, the shank diameter of which
equals the ball bore chamfer, (see A). One piece ball
studs (see B) of similar proportions also allow similar
misalignment. Exceeding these dimensional limits may
deform the race, so care should be taken to choose the
proper mounting arrangement.
Rod Ends offer the least misalignment absorbing
capability when fitted closely between the legs of a clevis
or when the ball is bolted against the face of a lever. The
limit is reached when the housing head strikes the
mounting member.
A
B
a1
STANDOFF WASHERS
C
C
a1
A
MOUNTING ARRANGEMENTS
B
Reference Letters
D – Head Diameter or Outer Race Diameter
H – Housing Width
W – Ball Width
A1=Sin–1 W – Sin–1 H
D
D
ANGLE OF MISALIGNMENT (A1)
208
Size
KF
-3
-4
-5
-6
-7
-8
-10
-12
-16
±15°
±15°
±15°
±15°
—
±15°
—
—
—
Boston Gear 800-825-6544
SERIES
HM-C/HF-C
CMHD/CFHD
HM/HF
±5-1/2°
±6-1/2°
±5-1/2°
±5°
±6°
±5°
±6°
±5°
±7°
±6°
±7°
±6°
±5-1/2°
±6°
±5°
±7-1/2°
±6°
—
HME/HFE
HMX/HFX
±6-1/2°
±8°
±7°
±6°
±7°
±6°
±8°
±7°
±7°
P-1930-BG
04/10
Engineering Information
Engineering Data
Spherical bearings offer a greater variety of mounting positions compared to the rod end bearings. The angle of
misalignment is calculated based on its mounting arrangement. Shown are three common mountings and the
formulae for calculating the angle of misalignment.
a2
a4
a3
a3
a2
a4
a4=Sin–1 B – Sin–1 H
E
E
a3=Sin–1 W – Sin–1 H
E
E
a2=Sin–1 W – Sin–1 H
A
A
Reference Letters
B – Ball Bore
C – Outer Race Chamfer
D – Head Diameter or Outer Race Diameter
E – Ball Diameter
H – Housing Width
A–
(D-2C)2 + H2
W – Ball Width
SPHERICAL BEARINGS
a2
a3
a4
Series
LHA
LHB
LHSS
LHSSE
LHSSVV
±9°
±8°
±9°
±8°
±6 1/2°
±7 1/2°
±8°
±9°
±6 1/2°
±6°
±5°
±5°
±16 1/2°
±14 1/2°
±14°
±12 1/2°
±11°
±12 1/2°
±12°
±15°
±10°
±18 1/2°
±7°
±7°
±34 1/2°
±29°
±30°
±27°
±25°
±23°
±23°
±27°
±25°
±23 1/2°
±23°
±25°
-2
-3
-4
-5
-6
-7
-8
-9
-10
-12
-14
-16
Series
LS
-3
-4
-5
-6
-7
-8
-10
-12
-16
-19
-24
-30
P-1930-BG
04/10
Mounting
Arrangements
Mounting
Arrangements
a2
a3
a4
±8 1/2°
±7°
±9°
±8°
±7 1/2°
±6 1/2°
±7°
±7 1/2°
±7°
±7°
±7°
±7 1/2°
±13 1/2°
±11°
±13°
±12°
±10 1/2°
±9 1/2°
±10°
±10°
±9°
±9°
±9°
±9 1/2°
±28°
±29 1/2°
±30°
±26°
±23°
±20 1/2°
±20°
±20°
±19°
±21°
±16°
±16°
Boston Gear 800-825-6544
209
F
Engineering Information
Engineering Data
Housing Bore for Press Fit of Spherical Bearings
Basic
Bearing
Size
F
3
4
5
6
7
8
10
12
16
19
24
30
Basic
Bearing
Size
2
3
4
5
6
7
8
9
10
12
14
16
210
D
Bearing O.D.
+.0000 /-.0005
LS SERIES
.6250
.7500
.8750
1.0000
1.1875
1.3125
1.5625
2.2500
2.3750
2.6250
3.2500
4.0000
D
Bearing O.D.
+.0000 /-.0005
HOUSING BORE
RECOMMENDED
(Aluminum or Steel)
.6248/.6243
.7498/.7493
.8748/.8743
.9998/.9993
1.1873/1.1868
1.3123/1.3118
1.5623/1.5618
2.2498/2.2493
2.3748/2.3743
2.6248/2.6243
3.2498/3.2493
3.9998/3.9993
HOUSING BORE
RECOMMENDED
(Aluminum or Steel)
LHA, LHB, LHSSE, LHSSVV SERIES
.4687
.4685/.4680
.5625
.5623/.5618
.6562
.6560/.6555
.7500
.7498/.7493
.8125
.8123/.8118
.9062
.9060/.9055
1.0000
.9998/.9993
1.0937
1.0935/1.0930
1.1875
1.1873/1.1868
1.4375
1.4373/1.4368
1.5625
1.5623/1.5618
1.7500
1.7498/1.7493
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Stud – Specifications
L
L
M
F
50°
50°
K
STAKED
SIDE
H
M
H
K
STAKED
SIDE
HIGH TENSILE STUDS
INTEGRAL STUDS
Steel studs are available in the CMHD/CFHD, HM/HF,
HM-C/HF-C and KF Series to facilitate right angle
connections. Standard misalignment is 50° in all sizes.
Threads are only available as right hand. There are two
types of studs available:
Numbering System
High Tensile Steel Studs
Use a “Y” suffix after the complete catalog number
Example: CFHDL-3Y
High Tensile Steel Studs–(Y Suffix)
Integral Ball Stud
High tensile steel studs are available for sizes 3 through
12. These studs are machined for exact fit-up within
the ball bore, providing smooth operation and high
performance. The studs are assembled to maintain the
internal clearances inherent in the Rod Ends. They are
permanently secured in the bore of the ball, threaded for
easy mounting and have a hex section to facilitate
tightening. The stud is designed to accommodate 50°
misalignment in any direction, and provides maximum
load capacity.
Use a “S” suffix after the complete catalog number
Example: HF-5S
Materials
Rod End:
Refer to basic Rod End specification page
Stud:
High tensile steel - Plated for corrosion
resistance
Integral Stud:
Integral Ball Studs–(S Suffix)
Low carbon steel - case hardened plated for corrosion resistance
The ball and stud are combined into a single unit of
case hardened machined plated steel. Wrench flats
are provided for tightening. These studs offer the same
operational features as the high tensile studs, with
slightly reduced load capacity. The integral studs are
available in sizes 3 through 8 only.
DIMENSIONS AND LOAD DATA
DIMENSIONS IN INCHES
To Fit
Rod End
Size
Stud
Thread
UNF-2
H
K
L
M
±.005
±.010
±.015
MIN
High-Tensile Stud
Ball Stud
3
4
5
10-32
1/4-28
5/16-24
.312
.375
.438
.500
.562
.687
1.016
1.047
1.234
.437
.500
.594
350
850
1,600
250
550
1,050
6
7
8
3/8-24
7/16-20
1/2-20
.500
.625
.625
.906
1.125
1.125
1.570
1.968
2.000
.812
.938
.938
2,400
2,700
3,100
1,500
1,800
2,200
10
12
5/8-18
3/4-16
.750
1.000
1.500
1.812
2.500
3.000
1.250
1.625
4,500
6,000
N/A
N/A
P-1930-BG
04/10
Static Load Rating (Lbs.)
Boston Gear 800-825-6544
211
Mounted Bearings
Replacement Bearings for Setscrew Locking Series
F
Mounted Bearings offer a simple, convenient method of
providing load support. Selection for most applications
may be readily accomplished from a single selection
chart, based on shaft size, radial and thrust load
requirements. Installation normally requires only bolting
to a suitable mounting surface and securing bearing to
shaft with setscrews or eccentric locking collar provided.
The Boston Gear Mounted Bearing line is one of the most
comprehensive available to industry. Ranging from light
duty, plain bearing blocks to precision units. They all
feature Boston Gear’s tradition of design excellence and
precision manufacture.
Light Duty Series
Standard Duty Series
Medium Duty Series
PPB — Split cast iron housing with
bore and mounting base machined.
All Series — Solid one-piece cast
iron
housing
of
American
manufacture with removable zerktype threaded grease fitting.
Precision machined base and
spherical bore. Available in pillow
block, 2 bolt and 4 bolt flanges.
MB Series — Solid one-piece heavy
duty cast iron housing with
removable zerk-type threaded grease
fitting. Available in pillow block 4 bolt
flange and piloted flange with
precision machined base, pilot
diameter and spherical bore.
Spherical
O.D.
bearing
of
international manufacture with
extended inner race and double
setscrews for positive shaft locking
and smoothness of operation.
SRP — PPB Series with a Bost-Bronz
(oil impregnated) sleeve bearing.
PS — Stamped steel housing with
pillow block, 2 bolt and 3 bolt flange
configuration. Extended inner race,
(2) setscrews locking to shaft.
Prelubricated spherical O.D. bearing.
XL — Ductile iron housing with pillow
block, 2 bolt and 3 bolt flange
configuration. Extended inner race,
(2) setscrews locking to shaft.
Prelubricated spherical O.D. bearing.
212
Boston Gear 800-825-6544
H & L Series — Eccentric shaft lock
of international manufacture.
S Series — Extended inner race with
double setscrews for positive shaft
locking.
P-1930-BG
04/10
Mounted Bearings
Replacement Bearings and Locking Collars
for Eccentric Locking Collar Series
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
Replacement
Bearings
Catalog
Item
Number
Code
INTERNATIONAL BEARINGS
Locking
Collars
Catalog
Item
Number
Code
Bearing and Carrier
(A Series Only)
Catalog
Item
Number
Code
NX3008M
NX3010M
NX4012M
NX5014M
NX5015M
NX5016M
NX6018M
NX6019M
NX6020M
NX7104M
NX7105M
NX7106M
NX7107M
NX8108M
NX9110M
NX9111M
NX9112M
NX10115M
NX11200M
NX11203M
NX11204M
NX11207M
NX3008LC
—
NX4012LC
—
NX5015LC
NX5016LC
—
NX6019LC
NX6020LC
—
NX7105LC
NX7106LC
NX7107LC
NX8108LC
NX9110LC
NX9111LC
NX9112LC
NX10115LC
NX11200LC
NX11203LC
—
NX11207LC
3A-1/2 B&C
3A-5/8 B&C
4A-3/4 B&C
5A-7/8 B&C
5A-15/16 B&C
5A-1 B&C
6A-1-1/8 B&C
6A-1-3/16 B&C
6A-1-1/4 B&C
—
—
—
—
—
—
—
—
—
—
—
—
—
67374
67377
67380
67383
67386
67389
67392
67395
67398
67401
67404
67407
67410
67413
67416
67419
67422
67425
67428
67431
67434
67437
67373
—
67379
—
67385
67388
—
67394
67397
—
67403
67406
67409
67412
67415
67418
67421
67424
67427
67430
—
67436
07030
07032
07014
07034
07036
07022
07038
07040
07042
—
—
—
—
—
—
—
—
—
—
—
—
—
(FOR USE WITH THE L, H, F, T AND A SERIES BEARINGS)
P-1930-BG
04/10
Boston Gear 800-825-6544
213
Mounted Bearings
Replacement Bearings for Setscrew Locking Series
F
PS & XL SERIES
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-3/8
1-7/16
S SERIES
Catalog
Number
Item
Code
NBG15-1/2
NBG15-5/8
NBG15-3/4
NBG15-7/8
NBG15-15/16
NBG15-1
NBG15-1-1/16
NBG15-1-1/8
NBG15-1-3/16
NBG15-1-1/4S
NBG15-1-3/8
NBG15-1-7/16
68880
68881
68882
68883
68884
68885
68886
68887
68888
68889
68891
68892
(FOR USE WITH THE PS, PS2,
PS3, XL, XL2 AND XL3 SERIES
BEARINGS)
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
MB SERIES
Catalog
Number
Item
Code
NBG25-1/2
NBG25-5/8
NBG25-3/4
NBG25-7/8
NBG25-15/16
NBG25-1
NBG25-1-1/16
NBG25-1-1/8
NBG25-1-3/16
NBG25-1-1/4S
NBG25-1-5/16
NBG25-1-3/8
NBG25-1-7/16
NBG25-1-1/2
NBG25-1-5/8
NBG25-1-11/16
NBG25-1-3/4
NBG25-1-15/16
NBG25-2
NBG25-2-3/16
NBG25-2-1/4
NBG25-2-7/16
68893
68894
68895
68896
68897
68898
68899
68900
68901
68902
68903
68904
68905
68906
68907
68908
68909
68910
68911
68912
68913
68914
Bore
1-7/16
1-1/2
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
2-1/2
2-11/16
2-15/16
3
3-3/16
3-1/4
3-7/16
3-1/2
Catalog
Number
Item
Code
NBG35-1-7/16
NBG35-1-1/2
NBG35-1-11/16
NBG35-1-3/4
NBG35-1-15/16
NBG35-2
NBG35-2-3/16
NBG35-2-1/4
NBG35-2-7/16
NBG35-2-1/2
NBG35-2-11/16
NBG25-2-15/16
NBG35-3
NBG35-3-3/16
NBG35-3-1/4
NBG35-3-7/16
NBG35-3-1/2
68915
68916
68917
68918
68919
68920
68921
68922
68923
68924
68925
68926
68927
68928
68929
68930
68931
(FOR USE WITH THE MB, MBF
AND MBP SERIES BEARINGS)
(FOR USE WITH THE SF, SH, SL
AND ST SERIES BEARINGS)
214
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Bearings
PPB Series SRP Series – With Bost-Bronz Bushings
Pillow Blocks – Light Duty Split Cast Iron
The bottom surface and the split surfaces are ground. Both end surfaces
of the bore are finished perpendicular to the base. Bolt holes in the base
are slotted except Cat. No. PPB4 which has drilled holes. PPB Series
blocks have an oil hole drilled in center of cap.†
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Catalog
Number
Item
Code
SRP SERIES
Pillow Blocks
Replacement Bearing
Catalog
Item
Catalog
Item
Number
Code
Number
Code
PPB4
PPB6
PPB8
PPB10
PPB12
PPB14
PPB15
PPB16
PPB19
PPB20
PPB23
PPB24
34304
34306
34308
34310
34312
34314
34316
34318
34320
34322
34324
34326
SRP4
SRP6
SRP8
SRP10
SRP12
—
SRP15
SRP16
SRP19
SRP20
—
—
PPB SERIES
Bore
1/4
3/8
1/2
5/8
3/4
7/8
15/16
1
1-3/16
1-1/4
1-7/16
1-1/2
*Two required.
34434
34436
34438
34440
34442
—
34444
34446
34448
34450
—
—
B46-2
B68-3
B812-4
B1014-6
B1216-6
—
B1520-8
B1620-8
B1924-8
B2024-8
—
—
34542
34634
34752
34852
34934
—
35042
35068
35172
35186
—
—
STANDARD TOLERANCES
Dimensions
Tolerance
PPB Series
Bore
All
+.000 to –.001
SRP Series
Bore
†The 1/4” size is made of brass and has no oil holes.
.252–1.003
1.1905–1.2530
+.000 to –.001
+.000 to –.002
L
K
F
D
A
M
D
B
J
C
H
E
G
ALL DIMENSIONS IN INCHES
A (Bore)
B
PPB SERIES
.2500
1/4
.3760
9/16
.5010
.6260
13/16
.7510
.8760
.9385
1-1/8
1.0010
1.1885
1.2510
1-3/8
1.4385
1.5010
SRP SERIES
.2510
9/16
.3770
.5020
13/16
.6270
1-1/8
.7530
.9405
1.0030
1-3/8
1.1905
1.2530
P-1930-BG
04/10
C
D
E
F
G
H
J
K
L
M
1-1/8
1/8
1-1/2
1/2
1/2
3/8
1/4
3/4
3/8
7/16
2-1/8
5/16x3/16
2-3/4
1-1/8
1
5/8
5/16
1-7/16
7/16
1
2-7/8
1/2x5/16
3-3/4
1-5/8
1-1/2
1
1/2
2
11/16
1-1/2
3-3/4
5/8x3/8
5
2-1/4
2
1-1/4
5/8
2-1/2
7/8
2
4-1/2
3/4x1/2
6
2-3/4
2-1/2
1-1/2
3/4
3
1
2-1/2
2-1/8
5/16x3/16
2-3/4
1-1/8
1
5/8
5/16
1-7/16
7/16
1
2-7/8
1/2x5/16
3-3/4
1-5/8
1-1/2
1
1/2
2
11/16
1-1/2
3-3/4
5/8x3/8
5
2-1/8
2
1-1/4
5/8
2-1/2
7/8
2
4-1/2
3/4x1/2
6
2-3/4
2-1/2
1-1/2
3/4
3
1
2-1/2
Boston Gear 800-825-6544
215
Mounted Ball Bearings
PS Series Pressed Steel Housing
Pillow Blocks – Light Duty Setscrew Locking
Features —
Quality pressed steel outer housing.
Deep groove ball bearings for high radial and thrust loads.
Spherical outer race for full self-alignment.
Synthetic lip type seals.
Positive locking by setscrews through extended inner race.
Lubricated for life.
Housing halves snap together for ease of assembly.
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
Catalog
Number
Item
Code
PS-1/2
PS-5/8
PS-3/4
PS-7/8
PS-15/16
PS-1
PS-1-1/16
PS-1-1/2
PS-1-3/16
PS-1-1/4S
64500
64501
64502
64503
64504
64505
64506
64507
64508
64509
STANDARD TOLERANCES
Dimensions
Bore
Tolerance
All
+.001 to –.000
ALL DIMENSIONS IN INCHES
Bore
A
1/2
7/8
5/8
3/4
1
7/8
15/16 1-1/8
1
1-1/16
1-1/8
1-5/16
1-3/16
1-1/4S
G
H
J
K
L
P
R*
Setscrew
UNF
S
Bolt
Size
1-3/4 1.125 2-11/16 3-5/8
1
.133
.34
.54
15/64
31/32
10—32
5/8
5/16
2-1/16 1.203
3
1
.178
.40
.54
9/32
1-11/64
10—32
45/64 5/16
2-7/32 1.328
3-3/8
4-1/2 1-1/8
.208
.40
.54
19/64 1-11/32
10—32
49/64
3/8
2-5/8 1.390
3-3/4
4-7/8 1-1/8
.238
.53
.75
5/16
1-39/64 1/4—28
53/64
3/8
B
C
E
F
4-1/8
Approx.
Weight
(Lbs.)
.52
.48
.58
.67
.64
.61
1.10
1.05
1.00
.95
*2 at 120°
Eccentric Locking Collar bearings are available to special order.
For Load Ratings, See Engineering Section, Page 236.
Replacement Bearings are shown on Page 214.
216
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
XL Series Cast Ductile Housing
Pillow Blocks – Light Duty Setscrew Locking
Features —
One-piece housing (ductile casting).
Deep groove ball bearings for high radial and thrust loads.
Machined housing bore and spherical outer race for full self-alignment.
Synthetic lip type seal.
Positive locking by setscrews through extended inner race.
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-3/8
1-7/16
Catalog
Number
Item
Code
XL-1/2
XL-5/8
XL-3/4
XL-7/8
XL-15/16
XL-1
XL-1-1/16
XL-1-1/8
XL-1-3/16
XL-1-1/4S
XL-1-3/8
XL-1-7/16
64534
64535
64536
64537
64538
64539
64540
64541
64542
64543
64545
64546
L
S
R
B
P
K
A
E MIN.
J
H
E MAX.
G
F
C
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
All
+.001 to –.000
ALL DIMENSIONS IN INCHES
Bore
A
B
C
1/2
5/8 1-3/16 2-5/32 1-1/8
3/4 1-5/16 2-7/16 1-15/64
7/8
15/16 1-7/16 2-21/32 1-11/32
1
1-1/16
1-1/8 1-11/16 3-5/32 1-31/64
1-3/16
1-1/4S
1-3/8 1-7/8 3-9/16 1-11/16
1-7/16
E
Min.
E
Max.
F
3-3/16 3-11/16 4-1/2
G
1
H
J
K
L
P
9/32 7/16 11/16 15/64 31/32
R*
Setscrew
UNF
S
10—32
5/8
Approx.
Bolt Weight
Size (Lbs.)
3/8
.6
3-5/8
3-7/8 4-3/4 1-1/16 5/16 7/16 9/16 9/32 1-11/64 10—32 45/64 3/8
.8
3-7/8
4-1/8
5
1-1/8 11/32 7/16 9/16 19/64 1-11/32 10—32 49/64 3/8
1.0
4-1/2
4-3/4
6
1-5/16 3/8
1.4
4-3/4
5
9/16 11/16 5/16 1-39/64 1/4—28 53/64 1/2
6-3/8 1-3/8 13/32 9/16 11/16 11/32 1-27/32 1/4—28
1
1/2
1.9
*2 at 120°
These units also available with Eccentric Locking Collars on Special Order.
For Load Ratings, see Engineering Section, Page 237.
Replacement Bearings are shown on Page 214.
P-1930-BG
04/10
Boston Gear 800-825-6544
217
Mounted Ball Bearings
L/H Series
Pillow Blocks – Standard Duty; Eccentric Locking Collar
L Series Low Backing
H Series High Backing
F
Features —
Rigid one piece housing.
Chrome alloy steel balls.
Spherical outer race.
Synthetic lip type seals.
Eccentric locking collar.
1/4-28 threaded grease fitting.
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2-1/4
2-7/16
Low Backing
High Backing
L Series
H Series
Catalog
Number
Item
Code
Catalog
Number
Item
Code
3L-1/2
3L-5/8
4L-3/4
5L-7/8
5L-15/16
5L-1
6L-1-1/8
6L-1-3/16
6L-1-1/4S
7L-1-1/4*
7L-1-5/16*
7L-1-3/8*
7L-1-7/16*
8L-1-1/2*
9L-1-5/8*
9L-1-11/16*
9L-1-3/4*
10L-1-15/16*
12L-2-1/4*
12L-2-7/16*
06906
06908
06912
06920
06922
06924
06928
06930
06934
06858
06860
06862
06864
06868
06876
06878
06880
06884
06898
06900
3H-1/2
3H-5/8
4H-3/4
5H-7/8
5H-15/16
5H-1
6H-1-1/8
6H-1-3/16
6H-1-1/4S
7H-1-1/4*
7H-1-5/16*
7H-1-3/8*
7H-1-7/16*
8H-1-1/2*
9H-1-5/8*
9H-1-11/16*
9H-1-3/4*
10H-1-15/16*
12H-2-1/4*
12H-2-7/16*
06902
06904
06910
06914
06916
06918
06932
06936
06926
06850
06852
06854
06856
06866
06870
06872
06874
06882
06894
06896
*Bearings equipped with steel flinger.
Replacement Bearings are shown on Page 213.
218
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
L/H Series
Pillow Blocks – Standard Duty; Eccentric Locking Collar
SHAFT HEIGHT DIMENSIONS IN INCHES
Low Backing
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
High Backing
A
B
H
A
B
H
1-1/16
2-5/32
1/2
1-3/16
2-9/32
5/8
1-1/4
2-15/32
9/16
1-5/16 2-17/32
5/8
1-5/16
2-21/32
5/8
1-7/16 2-25/32
3/4
1-9/16
3-1/8
3/4
1-11/16
7/8
L
S
R
B
P
K
A
E MIN.
3-1/4
J
H
E MAX.
G
F
1-13/16 3-11/16
1
1-7/8
3-3/4
1-1/16
1-15/16
4
1-1/8
2
4-1/16
1-3/16
2-1/16
4-1/4
1-1/4
2-1/8
4-5/16
1-5/16
C
STANDARD TOLERANCES
2-3/16
4-1/2
Dimensions
Bore
1-3/8
2-1/4
4-9/16
1-7/16
2-7/16
4-15/16 1-1/2
2-1/2
5
1-9/16
2-11/16
5-7/16
2-3/4
5-1/2
1-11/16
1-5/8
Tolerance
All
+.0012 to –.0000
ALL DIMENSIONS IN INCHES
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
E
C
F
G
J
K
L
R
Setscrew
UNF
S
1-9/64
1/4-28
7/8
P
Min.
Max.
3-5/16
4
5-1/16 1-1/2
7/16
25/32
1-45/64 3-7/16
4-1/8
5-1/4 1-9/16
7/16
25/32 19/64
1-19/64
1/4-28
1-47/64 3-7/16
4-1/4
5-1/2
1-5/8
7/16
11/16 19/64
1-1/2
1-59/64 4-5/16 4-15/16 6-1/4
1-3/4
9/16
7/8
23/64
5-3/8 6-11/16 1-7/8
9/16
7/8
1-5/8
2-13/64
4-3/4
2-3/8
5-1/4 5-13/16 7-1/4
2-7/16
5-9/16
6-1/8
2-5/8
6-1/16
2-29/32 6-7/16
Bolt
Size
Approx.
Wt. (Lbs.)
L
H
3/8
1.1
1.2
59/64
3/8
1.6
1.6
1/4-28
59/64
3/8
1.9
1.9
1-3/4
5/16-24
1-3/64
1/2
2.6
2.7
47/64
2-3/16
3/8-24
1-17/64 1/2
4.1
4.3
1/4
2
9/16
27/32 27/32
2-23/64
3/8-24
1-3/8
1/2
5.5
5.6
7-3/4
2-1/8
9/16
27/32 27/32
2-1/2
3/8-24
1-3/8
1/2
6.5
6.6
6-5/8
8-1/4
2-1/4
11/16
31/32 31/32
2-3/4
3/8-24
1-1/2
5/8
8.0
8.1
7-3/8
8-7/8
2-3/8
11/16
1-5/32 1-3/32
3
7/16-20 1-23/32 5/8
9.5
10.0
3-3/32 6-15/16 7-7/8
9-5/8
2-1/2
11/16
1-5/32 1-7/32
3-5/16
7/16-20 1-27/32 5/8
11.8
11.9
For Load Ratings, see Engineering Section, Page 237.
P-1930-BG
04/10
Boston Gear 800-825-6544
219
F
Mounted Ball Bearings
SL/SH Series
Pillow Blocks – Standard Duty; Extended Inner Race – Setscrew Locking
SL Series Low Backing
SH Series High Backing
F
Features —
One-piece, high grade cast iron housing.
Deep groove ball bearings for high radial and thrust loads.
Precision machined housing bore and spherical outer race for self-alignment.
Synthetic lip type seals with steel flinger.
Positive locking by setscrews through extended inner race.
1/4-28 threaded grease fitting and channel through outer race allow
relubrication.
ORDER BY CATALOG NUMBER OR ITEM CODE
Low Backing
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
High Backing
Catalog
Number
Item
Code
Catalog
Number
Item
Code
SL-1/2*
SL-5/8*
SL-3/4
SL-7/8
SL-15/16
SL-1
SL-1-1/8
SL-1-3/16
SL-1-1/4S
SL-1-1/4
SL-1-5/16
SL-1-3/8
SL-1-7/16
SL-1-1/2
SL-1-5/8
SL-1-11/16
SL-1-3/4
SL-1-15/16
SL-2
SL-2-3/16
SL-2-1/4
SL-2-7/16
64680
64682
64684
64686
64688
64690
64692
64694
64696
64698
64700
64702
64704
64706
64708
64710
64712
64714
64716
64718
64720
64722
SH-1/2*
SH-5/8*
SH-3/4
SH-7/8
SH-15/16
SH-1
SH-1-1/8
SH-1-3/16
SH-1-1/4S
SH-1-1/4
SH-1-5/16
SH-1-3/8
SH-1-7/16
SH-1-1/2
SH-1-5/8
SH-1-11/16
SH-1-3/4
SH-1-15/16
SH-2
SH-2-3/16
SH-2-1/4
SH-2-7/16
64679
64681
64683
64685
65687
64689
64691
64693
64695
64697
64699
64701
64703
64705
64707
64709
64711
64713
64715
64717
64719
64721
*Bearings not equipped with steel flinger.
Replacement Bearings are shown on Page 214.
220
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
SL/SH Series
Pillow Blocks – Standard Duty; Extended Inner Race – Setscrew Locking
SHAFT HEIGHT DIMENSIONS IN INCHES
Low Backing
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
High Backing
A
B
H
A
B
H
1-1/16
2-5/32
1/2
1-3/16
2-9/32
5/8
1-1/4
2-15/32
9/16
1-5/16 2-17/32
5/8
1-5/16 2-21/32
5/8
1-7/16 2-25/32
3/4
1-9/16
3/4
1-11/16
7/8
3-1/8
3-1/4
S
B
K
P
A
H
E MIN.
J
E MAX.
G
C
F
1-13/16 3-11/16
1
1-7/8
3-3/4
1-1/16
1-15/16
4
1-1/8
2
4-1/16
1-3/16
2-1/16
4-1/4
1-1/4
2-1/8
4-5/16
1-5/16
2-3/16
4-1/2
F
L
R
STANDARD TOLERANCES
Dimensions
Tolerance
1-3/8
2-1/4
4-9/16
1-7/16
2-7/16 4-15/16
1-1/2
2-1/2
5
1-9/16
2-11/16 5-7/16
1-5/8
2-3/4
5-1/2
1-11/16
Bore
All
+.0012 to –.0000
ALL DIMENSIONS IN INCHES
Bore
C
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
E
F
G
J
K
L
P
R*
Setscrew
(UNF)
S
Bolt
Size
Approx.
Wt. (Lbs.)
L
H
31/32
10-32
5/8
3/8
1.25
1.38
Min.
Max.
1-3/8
3-5/16
4
5-1/16 1-1/2
7/16
25/32
9/32
1-1/2
3-7/16
4-1/8
5-1/4 1-9/16
7/16
25/32
1/2 1-11/64
10-32
23/32
3/8
1.75
1.75
1-37/64
3-3/4
4-1/4
5-1/2
1-5/8
7/16
11/16
9/16 1-21/64
10-32
25/32
3/8
2.00
2.00
4-5/16 4-15/16 6-1/4
1-3/4
9/16
7/8
5/8 1-39/64
1/4-28
7/8
3/8
2.75
2.88
5-3/8 6-11/16 1-7/8
9/16
7/8
11/16 1-27/32
1/4-28
1
1/2
4.25
4.50
2
9/16
27/32
3/4
2-3/32
5/16-24
1-3/16
1/2
5.63
5.75
1-3/4
1-15/16
4-3/4
2-3/16
5-1/4 5-13/16 7-1/4
2-33/64 5-9/16
6-1/8
7-3/4
2-1/8
9/16
27/32
3/4 2-17/64
5/16-24
1-3/16
1/2
6.63
6.75
2-13/32 6-1/16
6-5/8
8-1/4
2-1/4
11/16
31/32
3/4 2-29/64
5/16-24
1-5/16
5/8
8.25
8.25
7-3/8
8-7/8
2-3/8
11/16
1-5/32
7/8 2-23/32
5/16-24
1-5/16
5/8
10.00 10.25
2-13/16 6-15/16 7-7/8
9-5/8
2-1/2
11/16
1-5/32
3/8-24
1-9/16
5/8
12.25 12.38
2-1/2
6-7/16
1
3-1/32
*2 at 120°
For Load Ratings, see Engineering Section, Page 237.
P-1930-BG
04/10
Boston Gear 800-825-6544
221
Mounted Ball Bearings
MB Series
Pillow Blocks – Medium Duty; Extended Inner Race – Setscrew Locking
Features —
One-piece high grade cast iron housing.
Deep groove ball bearings for high radial and thrust loads.
Precision machined housing bore and spherical race for full self-alignment.
Synthetic lip type seal with steel flinger.
Positive locking by setscrews through extended inner race.
1/4-28 threaded grease fitting and channel through outer race allow relubrication.
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
R
1-7/16
1-1/2
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
2-1/2
2-11/16
2-15/16
3
3-3/16
3-1/4
3-7/16
3-1/2
L
S
K
P
B
A
H
E MIN.
J
E MAX.
G
C
F
STANDARD TOLERANCES
Dimensions
Tolerance
Bore
All
+.001 to –.000
Catalog
Number
Item
Code
MB-1-7/16
MB-1-1/2
MB-1-11/16
MB-1-3/4
MB-1-15/16
MB-2
MB-2-3/16
MB-2-1/4
MB-2-7/16
MB-2-1/2
MB-2-11/16
MB-2-15/16
MB-3
MB-3-3/16
MB-3-1/4
MB-3-7/16
MB-3-1/2
64573
64574
64575
64576
64577
64578
64579
64580
64581
64582
64583
64584
64585
64586
64587
64588
64589
ALL DIMENSIONS IN INCHES
Bore
A
1-7/16 2-1/8
1-1/2 2-5/16
1-11/16
1-3/4 2-5/16
1-15/16
2-1/2
2
2-3/16
2-1/4 2-3/4
2-7/16
3
2-1/2
2-11/16 3-1/2
2-15/16
3-1/2
3
3-3/16
4
3-1/4
3-7/16
4
3-1/2
B
C
E
Min.
E
Max.
F
G
H
J
K
L
P
R*
Setscrew
(UNF)
S
Approx.
Bolt
Size Weight
(Lbs.)
4-3/16 2-17/64 5-1/16 6-5/16 6-1/2 2-1/4 3/4 9/16 1-3/16 3/4
4-9/16 2-1/2 5-9/16 6-11/16 8-1/4 2-5/8 13/16 11/16 1-1/4 3/4
1-27/32 5/16-24 1-9/64 1/2
2-3/32 5/16-24 1-3/16 5/8
6.8
9.0
4-5/8 2-19/32 5-1/2
6-3/4
8-1/4 2-5/8 13/16 11/161-5/16 3/4
2-17/64 5/16-24 1-9/32 5/8
9.5
5-1/16 2-3/4
6
7-1/2
8-7/8 2-7/8 7/8 11/161-7/16 7/8
2-23/32 5/16-24 1-5/16 5/8
11.7
6-5/8
7-7/8
9-5/8 3-1/8 1-1/16 13/161-7/16
3-1/32 3/8-24 1-9/16 3/4
16.2
7-3/16 8-13/16 10-3/8 3-1/4 1-1/16 13/16 1-5/8 1-3/16 3-27/64 3/8-24 1-3/4 3/4
21.5
5-5/8
3-1/8
6-3/16 3-3/8
1
6-15/16 3-3/8 7-15/1610-1/16 11-7/8 3-1/2 1-1/8 15/16
2
1-5/16 3-43/64 3/8-24 1-3/4 7/8
29.2
7-1/8 3-11/16 7-15/1610-1/16 11-7/8 3-1/2 1-1/4 15/16
2
1-5/16 3-7/8 1/2-20 1-15/16 7/8
31.5
1-1/4 15/162-5/161-11/32 4-3/16 1/2-20 2-1/32 7/8
41.1
4-3/8 1-5/16 15/16 2-3/8 1-9/16 4-25/64 1/2-20 2-7/32 7/8
47.8
8
4-1/32
9-3/4 12-1/2
15
8-1/4 4-13/32 9-11/1612-9/16
15
4
*2 at 120°
For Load Ratings, See Engineering Section, Page 237.
Replacement Bearings are shown on Page 214.
222
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
PS2/PS3 Series Pressed Steel Housing
Flanged Units – Light Duty; Setscrew Locking
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-1/4
1-3/8
1-7/16
3-BOLT
Catalog
Number
PS3-1/2
PS3-5/8
PS3-3/4
PS3-7/8
PS3-15/16
PS3-1
PS3-1-1/16
PS3-1-1/8
PS3-1-3/16
PS3-1-1/4S
PS3-1-1/4
PS3-1-3/8
PS3-1-7/16
2-BOLT
Catalog
Number
PS2-1/2
PS2-5/8
PS2-3/4
PS2-7/8
PS2-15/16
PS2-1
PS2-1-1/16
PS2-1-1/8
PS2-1-3/16
PS2-1-1/4S
Item
Code
64520
64521
64522
64523
64524
64525
64526
64527
64528
64529
64530
64532
64533
Item
Code
64510
64511
64512
64513
64514
64515
64516
64517
64518
64519
-----
F
-----
STANDARD TOLERANCES
Dimensions
Bore
F
K
R
B
B
A
All
+.001 to –.000
C
S
J
Tolerance
L
P
A
MIN.
FRAME
OPENING
F
D
M
E
ALL DIMENSIONS IN INCHES
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-1/4
1-3/8
1-7/16
A
B
3-3/16 2-1/2
C
E
F
Sq.
J
K
L
M
P
R*
Setscrew
UNF
S
Bolt
Size
5/8
1/4
23/64 45/64 9/32 1-15/16 2-5/16 15/64 13/64 31/32
10-32
3-9/16 2-13/16 .166
25/64 25/32 11/32 2-3/16 2-5/8
9/32 7/32 1-11/64
10-32
45/64 5/16
3-3/4
27/64 27/32 11/32 2-3/8 2-51/64 19/64 1/4 1-11/32
10-32
49/64 5/16
1/4 1-39/64 1/4-28
53/64 3/8
3
.150
D
.166
4-7/16 3-9/16 .208
29/64 15/16 13/32 2-13/16 3-5/16 5/16
4-13/16 3-15/16 .208
31/64 1-7/64 13/32 3-3/16
—
11/32 9/32 1-27/32 1/4-28
1
3/8
Approx.
Weight (Lbs.)
PS3 PS2
.63
.51
.59
.47
.74
.60
.87
.70
.84
.67
.81
.64
1.42 1.08
1.37 1.03
1.32 .98
1.27 .93
1.93
1.84
—
1.74
*2 at 120°
Eccentric Locking Collar bearings are available to special order.
On 1-1/4” through 1-7/16” Hole Diameters, Eccentric Collar bearings will have extended inner races on both sides and will project
beyond “M” dimension.
For Load Ratings, see Engineering Section, Page 236.
Replacement Bearings are shown on Page 214.
P-1930-BG
04/10
Boston Gear 800-825-6544
223
Mounted Ball Bearings
XL2/XL3 Series Cast Ductile Housing
Flanged Units – Light Duty; Setscrew Locking
ORDER BY CATALOG NUMBER OR ITEM CODE
3-BOLT
Catalog
Number
XL3-1/2
XL3-5/8
XL3-3/4
XL3-7/8
XL3-15/16
XL3-1
XL3-1-1/16
XL3-1-1/8
XL3-1-3/16
XL3-1-1/4S
XL3-1-3/8
XL3-1-7/16
Bore
F
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-3/8
1-7/16
2-BOLT
Catalog
Number
XL2-1/2
XL2-5/8
XL2-3/4
XL2-7/8
XL2-15/16
XL2-1
XL2-1-1/16
XL2-1-1/8
XL2-1-3/16
XL2-1-1/4S
XL2-1-3/8
XL2-1-7/16
Item
Code
64560
64561
64562
64563
64564
64565
64566
64567
64568
64569
64571
64572
Item
Code
64547
64548
64549
64550
64551
64552
64553
64554
64555
64556
64558
64559
STANDARD TOLERANCES
Dimensions
Bore
Tolerance
All
+.001 to –.000
K
E
D
F
C
R
A
A
J
S
B
B
L
P
F
J
ALL DIMENSIONS IN INCHES
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-3/8
1-7/16
A
3-3/16
B
C
D
F
Sq.
1
9/32 1-13/16 1-15/16 15/64
J
K
L
P
R*
Setscrew
UNF
31/32
10-32
S
Bolt
Size
5/8
Approx.
Weight (Lbs.)
XL3 XL2
1/4
.6
.5
3-9/16 2-13/16 7/16
3/4
1-1/8 11/32 2-1/16
2-1/4
9/32 1-11/64
10-32
45/64 3/16
.7
.7
3-3/4
3/4
1-1/8 11/32 2-5/16
2-1/2
19/64 1-11/32
10-32
49/64 5/16
.8
.8
3-9/16 15/32 27/32 1-19/64 13/32 2-13/16 2-15/16 5/16 1-39/64 1/4-28
53/64 3/8
1.2
1.2
1.6
1.5
4-7/16
2-1/2 27/64 11/16
E
3
7/16
4-13/16 3-15/16 1/2
29/32
1-1/2 13/32 3-3/16
3-3/8
11/32 1-27/32 1/4-28
1
3/8
*2 at 120°
These units also available with Eccentric Locking Collars on Special Order.
For Load Ratings, See Engineering Section, Page 237.
Replacement Bearings are shown on Page 214.
224
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
F/T Series
Flanged Units – Standard Duty; Eccentric Locking Collar
F Series 4-Bolt
T Series 2-Bolt
Features —
F
Rigid one-piece high housing.
Chrome alloy steel balls. Spherical outer race.
Synthetic lip type seals.
Eccentric locking collar.
1/4-28 threaded grease fitting.
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
4-BOLT FLANGES
F SERIES
Catalog
Item
Number
Code
3F-1/2
06938
3F-5/8
06940
4F-3/4
06942
5F-7/8
06944
5F-15/16
06946
5F-1
06948
6F-1-1/8
06950
6F-1-3/16
06952
6F-1-1/4S
06954
7F-1-1/4*
06956
7F-1-5/16*
06958
7F-1-3/8*
06960
7F-1-7/16*
06962
8F-1-1/2*
06964
9F-1-5/8*
06966
9F-1-11/16*
06968
9F-1-3/4*
06970
10F-1-15/16* 06972
11F-2*
06974
11F-2-3/16*
06976
12F-2-1/4*
06978
12F-2-7/16*
06980
2-BOLT FLANGES
T SERIES
Catalog
Item
Number
Code
3T-1/2
06982
3T-5/8
06984
4T-3/4
06986
5T-7/8
06988
5T-15/16
06990
5T-1
06992
6T-1-1/8
06994
6T-1-3/16
06996
6T-1-1/4S
06998
7T-1-1/4*
07000
7T-1-5/16*
07002
7T-1-3/8*
07004
7T-1-7/16*
07006
—
—
—
—
—
—
—
—
10T-1-15/16*
50695
—
—
—
—
—
—
—
—
*Bearings equipped with steel flinger.
Replacement Bearings are shown on Page 213.
P-1930-BG
04/10
Boston Gear 800-825-6544
225
Mounted Ball Bearings
F/T Series
Flanged Units – Standard Duty; Eccentric Locking Collar
ENVELOPE AND BOLT SPACING DIMENSIONS IN INCHES
A
4-BOLT
B
A
2-BOLT
B
K
2-7/8
2-1/8
3-3/4
3
2-9/32
3-3/8
2-1/2
4-13/32
3-17/32
2-37/64
3-3/4
2-3/4
4-57/64
3-57/64
2-53/64
4-1/4
3-1/4
5-19/32
4-19/32
3-19/64
4-5/8
3-5/8
6-1/8
5-1/8
3-11/64
5-1/8
4
—
—
—
5-3/8
4-1/8
—
—
—
5-5/8
4-3/8
7-7/16
6-3/16
4-9/16
6-3/8
5-1/8
—
—
—
6-7/8
5-5/8
—
—
—
Bore
A
SQUARE
F
K
D
S
B
SQUARE
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
L
R
B
J
A
P
F
F
C
E
STANDARD TOLERANCES
Dimensions
Bore
All
Tolerance
+.0012 to –.0000
ALL DIMENSIONS IN INCHES
Bore
C
D
E
F
Bolt
J
L
P
F
T
R*
Setscrew
UNF
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
7/16
1-1/16
1-37/64
3/8
2
1/4
1-9/64
1/4-28
7/8
.9
.9
1/2
1-7/32
1-13/16
3/8
2-1/4
19/64
1-19/64
1/4-28
59/64
1.7
1.2
9/16
1-1/4
1-27/32
7/16
2-1/2
19/64
1-1/2
1/4-28
59/64
2.0
1.6
9/16
1-11/32
2
7/16
2-15/16
23/64
1-3/4
5/16-24
1-3/64
2.7
2.1
5/8
1-3/8
2-1/8
1/2
3-1/4
47/64
2-3/16
3/8-24
1-17/64
3.7
2.8
11/16
1-37/64
2-11/32
1/2
3-3/4
27/32
2-23/64
3/8-24
1-3/8
5.0
—
11/16
1-39/64
2-11/32
9/16
3-7/8
27/32
2-1/2
3/8-24
1-3/8
5.4
—
11/16
1-51/64
2-19/32
9/16
4-1/8
31/32
2-3/4
3/8-24
1-1/2
6.0
4.8
3/4
1-31/32
2-15/16
5/8
4-1/2
1-3/32
3
7/16-20
1-23/32
8.4
—
3/4
2-1/8
3-3/16
5/8
4-7/8
1-7/32
3-5/16
7/16-20
1-27/32
10.0
—
S
Approx.
Weight (Lbs.)
F
T
*2 at 120°.
For Load Ratings, See Engineering Section, Page 237.
226
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
SF/ST Series
Flanged Units – Standard Duty; Extended Inner Race – Setscrew Locking
SF Series 4-Bolt
ST Series 2-Bolt
Features —
F
One-piece high grade cast iron housing.
Deep groove ball bearings for high radial and thrust loads.
Precision machined housing bore and spherical outer race for self-alignment.
Synthetic lip type seal with steel flinger.
Positive locking by setscrews through extended inner race.
1/4-28 threaded grease fitting and channel through outer race allow
relubrication.
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
4-BOLT
Catalog
Number
SF-1/2
SF-5/8
SF-3/4
SF-7/8
SF-15/16
SF-1
SF-1-1/8
SF-1-3/16
SF-1-1/4S
SF-1-1/4
SF-1-5/16
SF-1-3/8
SF-1-7/16
SF-1-1/2
SF-1-5/8
SF-1-11/16
SF-1-3/4
SF-1-15/16
SF-2
SF-2-3/16
SF-2-1/4
SF-2-7/16
Item
Code
64736
64737
64738
64739
64740
64741
64742
64743
64744
64745
64746
64747
64748
64749
64750
64751
64752
64753
64754
64755
64756
64757
2-BOLT
Catalog
Number
ST-1/2
ST-5/8
ST-3/4
ST-7/8
ST-15/16
ST-1
ST-1-1/8
ST-1-3/16
ST-1-1/4S
ST-1-1/4
ST-1-5/16
ST-1-3/8
ST-1-7/16
—
—
—
—
ST-1-15/16
—
—
—
—
Item
Code
64723
64724
64725
64726
64727
64728
64729
64730
64731
64732
64733
64734
64735
—
—
—
—
50696
—
—
—
—
Replacement Bearings are shown on Page 214.
P-1930-BG
04/10
Boston Gear 800-825-6544
227
Mounted Ball Bearings
SF/ST Series
Flanged Units – Standard Duty; Extended Inner Race – Setscrew Locking
ENVELOPE AND BOLT SPACING DIMENSIONS IN INCHES
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
A
SQUARE
F
K
B
SQUARE
R
E
S
A
J
L
P
B
F
C
D
F
STANDARD TOLERANCES
Dimensions
Bore
All
Tolerance
+.0012 to –.0000
4-BOLT
A
B
2-7/8
2-1/8
A
3-3/4
2-BOLT
B
3
K
2-9/32
3-3/8
2-1/2
4-13/32
3-17/32
2-37/64
3-3/4
2-3/4
4-57/64
3-57/64
2-53/64
4-1/4
3-1/4
5-19/32
4-19/32
3-19/64
4-5/8
3-5/8
6-1/8
5-1/8
3-11/64
5-1/8
4
—
—
—
5-3/8
4-1/8
—
—
—
5-5/8
6-3/8
4-3/8
5-1/8
7-7/16
—
6-3/16
—
4-9/16
—
6-7/8
5-5/8
—
—
—
ALL DIMENSIONS IN INCHES
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-5/8
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
Approx.
Weight (Lbs.)
SF
ST
C
D
E
F
Bolt
J
L
P
R*
Setscrew
UNF
7/16
1-1/16
1-17/64
3/8
2
9/32
31/32
10-32
5/8
.9
.9
1/2
1-7/32
1-31/64
3/8
2-1/4
1/2
1-11/64
10-32
23/32
1.7
1.2
9/16
1-1/4
1-9/16
7/16
2-1/2
9/16
1-11/32
10-32
25/32
2.0
1.6
9/16
1-11/32
1-11/16
7/16
2-15/16
5/8
1-39/64
1/4-28
7/8
2.7
2.1
5/8
1-3/8
1-27/32
1/2
3-5/16
11/16
1-27/32
1/4-28
1
3.7
2.8
11/16
1-37/64
2-1/64
1/2
3-3/4
3/4
2-3/32
5/16-24
1-3/16
5.0
—
11/16
1-39/64
2-1/64
9/16
3-7/8
3/4
2-17/64
5/16-24
1-3/16
5.4
—
11/16
1-51/64
2-3/8
9/16
4-1/8
3/4
2-29/64
5/16-24
1-9/32
6.0
4.8
3/4
1-31/32
2-17/32
5/8
4-1/2
7/8
2-23/32
5/16-24
1-5/16
8.4
—
3/4
2-1/8
2-29/32
5/8
4-7/8
1
3-1/32
3/8-24
1-9/16
10.0
—
S
*2 AT 120°
For Load Ratings, See Engineering Section, Page 237.
228
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
MBF Series
Flanged Units – Medium Duty; Extended Inner Race – Setscrew Locking
Features —
One-piece high grade cast iron housing.
Deep groove ball bearings for high radial and thrust loads.
Precision machined housing bore and spherical outer race for full self-alignment.
Synthetic lip type seal with steel flinger.
Positive locking by setscrews through extended inner race.
1/4-28 threaded grease fitting and channel through outer race allow relubrication.
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
1-7/16
1-1/2
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
2-1/2
2-11/16
2-15/16
3
3-3/16
3-1/4
3-7/16
3-1/2
Catalog
Number
MBF-1-7/16
MBF-1-1/2
MBF-1-11/16
MBF-1-3/4
MBF-1-15/16
MBF-2
MBF-2-3/16
MBF-2-1/4
MBF-2-7/16
MBF-2-1/2
MBF-2-11/16
MBF-2-15/16
MBF-3
MBF-3-3/16
MBF-3-1/4
MBF-3-7/16
MBF-3-1/2
Item
Code
64590
64591
64592
64593
64594
64595
64596
64597
64598
64599
64600
64601
64602
64603
64604
64605
64606
A
SQUARE
B
SQUARE
E
L
S
R
J
P
C
D
F
STANDARD TOLERANCES
Dimensions
Bore
Tolerance
1-7/16-1-3/4
1-15/16-3-1/2
+.0010 to –.0000
+.0012 to –.0000
Approx.
Weight
(Lbs.)
1-9/64
5.5
1-3/16
6.0
ALL DIMENSIONS IN INCHES
Bore
A
B
C
D
E
F
Bolt
J
L
1-7/16
1-1/2
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
2-1/2
2-11/16
2-15/16
3
3-3/16
3-1/4
3-7/16
3-1/2
5-1/8
5-3/8
4
4-1/8
11/16
11/16
1-37/64
1-39/64
2-5/32
2-5/32
1/2
9/16
3-3/4
3-7/8
3/4
3/4
R*
Setscrew
UNF
1-27/32 5/16-24
2-3/32 5/16-24
5-5/8
4-3/8
11/16
1-51/64
2-3/8
9/16
4-1/8
3/4
2-17/64 5/16-24
1-9/32
6.8
6-3/8
5-1/8
3/4
1-31/32
2-17/32
5/8
4-1/2
7/8
2-23/32 5/16-24
1-5/16
10.5
6-7/8
5-5/8
3/4
2-1/8
2-29/32
5/8
4-7/8
1
3-1/32
3/8-24
1-9/16
12.1
7-1/8
5-7/8
3/4
2-5/32
3-1/16
5/8
5-3/4
1-3/16
3-27/64 3/8-24
1-3/4
16.4
3-43/64 3/8-24
P
S
7-5/8
6
3/4
2-5/16
3-3/16
3/4
5-3/4
1-5/16
1-3/4
20.6
7-5/8
6
13/16
2-7/16
3-1/2
3/4
6-1/4
1-5/16
3-7/8
1/2-20
1-15/16
21.4
8-3/8
6-3/4
15/16
2-13/32
3-17/32
3/4
6-7/8
1-11/32
4-3/16
1/2-20
2-1/32
26.7
8-3/8
6-3/4
15/16
2-11/16
3-31/32
3/4
7
1-9/16
4-25/64 1/2-20
2-7/32
20.0
*2 AT 120°
For Load Ratings, See Engineering Section, Page 237.
Replacement Bearings are shown on Page 214.
P-1930-BG
04/10
Boston Gear 800-825-6544
229
Mounted Ball Bearings
MBP Series
Piloted Flanged Units – Medium Duty; Extended Inner Race – Setscrew Locking
Features —
One-piece high grade cast iron housing.
Deep groove ball bearings for high radial and thrust loads.
Precision machined housing bore and spherical outer race for full self-alignment.
Synthetic lip type seal with steel flinger.
Positive locking by setscrews through extended inner race.
1/4-28 threaded grease fitting and channel through outer race allow relubrication.
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Catalog
Number
MBP-1-7/16
MBP-1-1/2
MBP-1-11/16
MBP-1-3/4
MBP-1-15/16
MBP-2
MBP-2-3/16
MBP-2-1/4
MBP-2-7/16
MBP-2-1/2
MBP-2-11/16
MBP-2-15/16
MBP-3
MBP-3-7/16
MBP-3-1/2
Bore
G
J
S
1-7/16
1-1/2
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
2-1/2
2-11/16
2-15/16
3
3-7/16
3-1/2
L
R
N
K
P
H
M
D
F
B SQUARE
E
A SQUARE
STANDARD TOLERANCES
Dimensions
Item
Code
64607
64608
64609
64610
64611
64612
64613
64614
64615
64616
64617
64618
64619
64620
64621
Tolerance
Bore
1-7/16-1-3/4
1-15/16-3-1/2
+.0010 to –.0000
+.0012 to –.0000
K
All
+.000 to –.002
ALL DIMENSIONS IN INCHES
Bore
J
K
L
4
4
3-5/8
3-5/8
3/4
3/4
R*
Approx.
Setscrew S
Weight
UNF
(Lbs.)
7/16 2-1/4 1-27/32 5/16-24 1-9/64 5.5
7/16 2-9/32 2-3/32 5/16-24 1-3/16 6.0
4-15/16 3-5/8 1-3/8 1-11/16 1/2 11/32 15/16 4-1/2 4-1/4
3/4
7/16 2-9/16 2-17/64 5/16-24 1-9/32
6.8
5-3/16 3-13/16 1-3/8 1-21/32 1/2 17/32 15/16 4-3/4 4-1/2
7/8
7/16
2-3/4 2-23/32 5/16-24 1-5/16
10.5
1
1/2
3-1/16 3-1/32
3/8-24 1-9/16
12.1
1/2
3-9/32 3-27/64
3/8-24
1-3/4
16.4
7-1/8 5-5/16 1-21/32 2-5/32 5/8 29/32 1-5/32 6-9/16 6-3/8 1-5/16
1/2 3-11/32 3-43/64
3/8-24
1-3/4
20.6
7-1/8 5-5/16 1-7/8
5/8 3-23/32 3-7/8
1/2-20 1-15/16 21.4
5/8
1/2-20 2-7/32
A
1-7/16
1-1/2
1-11/16
1-3/4
1-15/16
2
2-3/16
2-1/4
2-7/16
2-1/2
2-11/16
2-15/16
3
3-7/16
3-1/2
B
D
E
F
Bolt
G
H
4-1/4 3-3/32 1-5/16 1-17/32 7/16 13/32 7/8
4-1/4 3-3/32 1-11/32 1-9/16 7/16 3/8 29/32
5-13/16 4-1/4 1-15/32 1-7/8
6-1/4 4-19/32 1-5/8
2-1/8
2-3/8
1/2 11/16 31/32 5-3/8
5
1/2 13/16 1-1/8 5-3/4 5-1/2 1-3/16
5/8
7/8
1-1/4 6-9/16 6-3/8 1-5/6
8-3/8 6-3/32 1-31/32 2-21/32 3/4 1-1/8 1-11/32 7-3/4 7-3/8 1-9/16
M
N
P
4-5/16 4-25/64
30.0
*2 AT 120°
For Load Ratings, See Engineering Section, Page 237
Replacement Bearings are shown on Page 214.
230
Boston Gear 800-825-6544
P-1930-BG
04/10
Mounted Ball Bearings
A Series
Adjustable Shaft Supports – Standard Duty; Eccentric Locking Collar
E
R
F
W
Features —
D
MAX.
S
N
O
D
MIN.
L
K
M
B
F
Rigid one piece housing.
Chrome alloy steel balls.
Spherical outer race.
Synthetic lip type seals.
Eccentric locking collar.
1/4-28 threaded grease fitting.
G
A
H
C
ORDER BY CATALOG NUMBER OR ITEM CODE
Catalog
Number
3A-1/2
3A-5/8
4A-3/4
5A-7/8
5A-15/16
5A-1
6A-1-1/8
6A-1-3/16
6A-1-1/4S
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
Item
Code
07008
07010
07012
07016
07018
07020
07024
07026
07028
STANDARD TOLERANCES
Dimensions
Bore
Tolerance
All
+.001 to –.000
ALL DIMENSIONS IN INCHES
D
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
Bore
1/2
5/8
3/4
7/8
15/16
1
1-1/8
1-3/16
1-1/4S
A
B
C
Min.
Max.
E
F
G
Max.
Min.
H
Max.
7-1/8
5-1/8
3-1/8
2-13/32
6-1/16
4-7/8
2-3/4
7-7/16
2-1/2
3-21/32
7-1/8
5-1/8
3-1/8
2-17/32
6-1/16
4-7/8
2-3/4
7-9/16
8-1/4
6-1/4
3-3/4
2-25/32
7-1/16
5-11/16
3-1/8
8-11/16
3
4-9/32
11-1/4
8-1/8
4-1/2
3-1/2
9-15/16
7-11/16
4-3/8
11-25/32
3-7/16
6-7/16
2-13/16 3-17.32’
K
L
M
N
O
R
S
W
Bolt
Size
5/8
3-15/16
2-1/4
5/8
3/8
1-9/16
11/16
15/16
5/16
5/8
3-15/16
2-1/4
5/8
3/8
1-23/32
11/16
1-3/64
5/16
3/4
4-13/16
2-3/4
3/4
1/2
1-3/4
15/16
1-1/16
7/16
1
6-3/8
3-1/4
1-1/4
5/8
2-5/16
1-1/8
1-3/16
9/16
NOTE: For applications where direction of radial bearing load is away from base, it is recommended that a hole be drilled near the
end of each post and a suitable size pin inserted, as a safety precaution.
Replacement Bearings are shown on Page 213.
P-1930-BG
04/10
Boston Gear 800-825-6544
231
Mounted Bearings
TU Series
Take-Up Frames
Boston Gear Take-up Frames are designed for use with Boston’s Standard
Duty Pillow Blocks. Pillow Block units are not included.
Features —
F
Bolted steel frame
3 or 4 bolt frame mounting
Bolt hole centers adjustable
ADJUSTMENT
K
W
T1 BOLTS
K
D
“T” BOLTS
D
D
MOUNTING
BOLTS “F”
V
Y
L
E
V
H
R
G
E
U
Z
Y
Z
V
E
B
C
ALL DIMENSIONS IN INCHES
Pillow Block
Bore
Adjustment
6
1/2-1
9
12
6
9
1-1/8-1-3/4
12
18
9
12
1-15/16-2-7/16 18
24
B
16
19
22
19-1/8
22-1/8
25-1/8
31-1/8
25-5/16
28-5/16
34-5/16
40-5/16
C
D
17
20
1-3/4
23
20-1/4
23-1/4
26-1/4 2-3/8
32-1/4
26-9/16
29-9/16
3
35-9/16
41-9/16
E
F
Bolts
G
H
K
L
R
2-5/8
3/8
1-5/8
3/16
5
2-1/8
1-3/4
3-1/8
1/2
2-1/8
1/4
6-9/16
2-11/16
2-3/16
4
5/8
2-3/4
5/16
8-5/32
3-5/16
2-3/4
ORDER BY CATALOG NUMBER OR ITEM CODE
Pillow Block
Bore
Adjustment
6
1/2-1
9
12
6
9
1-1/8-1-3/4
12
18
9
12
1-15/16-2-7/16
18
24
232
Bolts
W
T
T1
5/16
3/8
3/8
1/2
1/2
5/8
Boston Gear 800-825-6544
U
15-1/4
18-1/4
21-1/4
18-1/8
21-1/8
24-1/8
30-1/8
24-1/16
27-1/16
33-1/16
39-1/16
V
Min.
Max.
Y
Z
1-1/16
3
5
1-1/16
15/16
1-11/32
3-3/4
7-1/4 1-11/32
1-3/32
1-5/8
4-1/4
9
1-11/16
1-13/16
Catalog
Number
TU816-6
TU816-9
TU816-12
TU1828-6
TU1828-9
TU1828-12
TU1828-18
TU3139-9
TU3139-12
TU3139-18
TU3139-24
Item
Code
29827
29828
29829
29830
29831
19832
29833
29834
29835
29836
29837
P-1930-BG
04/10
Engineering Information
Analysis of Radial Bearing Loads for Unmounted and Mounted Rolling Elements
Radial Load
Radial bearing loads are determined by analysis of all
the forces applied to a shaft. In many instances this
becomes a complex analysis and should be performed
with expertise. However, many applications involve
simple loading and may be calculated with basic
information.
Many shafts are supported by two bearings, with a load
“L” applied either between two bearings, as in Figure 1;
or with load overhung, as in Figure 2. In either case, the
reaction on the bearing is dependent upon:
a. The point of load application
b. The magnitude of the load.
c. The distance between the bearing centers.
With the above information known, the reactions, due
to the loads, on the bearings, may be calculated.
BEARING 1
BEARING 2
In this text we are mainly considering radial loading of
the shaft. Each load should be calculated individually
as the sum of these will be used to calculate the load
imposed on the bearings.
Load Connection Factor
Loads applied by various types of drives may be
calculated with use of the following load connection
factors and formula:
2TK
L=
D
L =Load (Lbs.)
(63025)(H.P.)
T = Torque (Lb-Ins.)
T=
RPM
K = Load Connection Factor
D = P.D. of Sprocket, Pinion, or Pulley (In.)
Load Connection Factors (K)
Sprocket or Timing Belt . . . . . . . . . . . . . . . . . . . . . 1.00
Pinion and Gear Drive. . . . . . . . . . . . . . . . . . . . . . . 1.25
Pulley and V-Belt Drive . . . . . . . . . . . . . . . . . . . . . 1.50
Pulley and Flat-Belt Drive . . . . . . . . . . . . . . . . . . . . 2.50
Example “A”
FIGURE 1.
When the applied load is located between the two
bearings, it is commonly referred to as “Straddle”
loading.
BEARING BEARING
1
2
FIGURE 2.
When the applied load is located outside the two
bearings, it is commonly referred to as “Overhung”
loading.
The loading of a shaft usually is the result of forces
generated by gearing, sprockets or pulleys, the weight
of these parts and friction.
Normally the weight of the parts and friction are
ignored. However, if the weight of these parts is large,
they should be considered.
P-1930-BG
04/10
Load smooth and steady 8 hours per day.
#40 Chain Drive
30 Tooth Sprocket
4.783 Sprocket P.D.
2 HP
500 RPM
5/8 Shaft Dia.
With the above information the load can be calculated
as follows:
2TK
L=
D
T=
63025 x 2
= 252 In. Lbs.
RPM
K = 1.0 From Load Connection Factor Table
D = 4.783
L=
2 x 252 x 1.0
4.783
L =105 lbs. Radial Load
Boston Gear 800-825-6544
233
F
Engineering Information
Analysis of Radial Bearing Loads for Unmounted and Mounted Rolling Elements (Cont’d)
F
Magnitude of Load Acting on Bearings
Example “B”
Once the applied load or loads that act on the shaft is
determined, we may now apply it to the bearings.
Load given in Example “A” = 105 lbs. is in overhung
condition, as shown.
There are many types of loadings that can be imposed
on a bearing:
BRG.
1
BRG.
2
Straddle Loaded Bearings
Radial Applied Load Acting On Shaft
3.00
BRG.
1
BRG.
2
1.50
4.50
LA
105
A
B
LOAD BEARING I
L xB
LI = A
A
LA
C
Load Bearing I = L I =
LI =
LA x B
C
Load Bearing II = L II =
L I = 52.5 lbs.
LA x A
C
LOAD BEARING II
L xC
L2 = A
A
Check L I + L II = L A
Overhung Loaded Bearings
Radial Applied Load Acting On Shaft
BRG.
1
105 x 1.50
3.00
L2 =
BRG.
2
105 x 4.5
3.0
L 2 = 157.5 lbs.
CHECK
L II – L I = LA
A
B
157.5 – 52.5 = 105
C
105 = 105
LA
Load Bearing I = L I =
LA x B
A
Load Bearing II = L II =
LA x C
A
Check L II – L I = L A
234
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Ball and Mounted Ball Bearing Selection
Bearing selection for the majority of applications can be
made directly from the Load Rating Tables. Mounted
bearings are listed individually on each page. The
mounted bearings tables are located on Pages 108-109.
The following procedure may be followed:
1. Determine the actual radial load to be supported by
the bearing. For applications involving heavy shock
loads or severe vibration, actual load should be
multiplied by a service factor from 1.1 to 1.5
depending on the severity of these conditions.
2. Select a bearing from the table that has a radial load
rating equal to or greater than the actual radial load
determined in Step 1, for the life desired at the
required operating speed.
Ball bearing rating tables are based on an “Average”
bearing life of 2500 hours. Average or medium life
(L50) is the life that may be expected from 50% or
more of a given group of bearings operating under
an identical steady load condition. The minimum life
(L10) is the life expectancy of at least 90% of a group
of bearings and is approximately 1/5 average.
Example ‘C’
Service
Factor
.8
1.0
1.25
1.50
1.75
2.0
Operating Conditions
Uniform — not more than 15 minutes in 2 hours.
Moderate Shock — not more than 15 minutes in 2 hours.
Uniform — not more than 10 hours per day
Moderate Shock — not more than 10 hours per day.
Uniform — more than 10 hours per day.
Heavy Shock — not more than 15 minutes in 2 hours.
Moderate Shock — more than 10 hours per day.
Heavy Shock — not more than 10 hours per day.
Heavy Shock — more than 10 hours per day.
Using loading from Example “B,” select a mounted
bearing suitable to give an average life (L50) of 15,000
hours.
Known—
Load Bearing I = 52.5
Load Bearing II = 157.5
Shaft Diameter 5/8 (From Example “A”)
Service Factor 1 (From Example “A”)
500 RPM (From Example “A”)
From the Rating Table, Page 237, as shown, a standard
duty bearing (either eccentric collar or extended set
screw inner race) may be selected.
P-1930-BG
04/10
Boston Gear 800-825-6544
235
F
Engineering Information
Mounted Ball Bearing Radial Load Capacities Light Duty
PS Series Pillow Blocks
Shaft
Sizes
F
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4
Average
Life (L50)
Hours
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
50
300
300
300
300
300
350
350
350
350
350
400
400
400
400
400
600
600
600
600
600
100
300
300
300
300
300
350
350
350
350
350
400
400
400
400
400
600
600
600
600
600
Speed (R.P.M.)
Radial Load (Pounds)
500
1000
1500
300
300
300
300
300
300
300
245
215
280
220
195
245
195
170
350
350
350
350
350
350
350
330
285
350
300
260
350
260
225
400
400
400
400
400
400
400
360
315
400
325
285
360
285
250
600
600
600
600
600
600
600
500
435
570
455
395
500
395
345
1800
300
300
200
180
160
350
350
270
245
215
400
400
295
270
235
600
600
410
375
325
2000
300
300
195
175
155
350
350
260
235
205
400
400
285
260
225
600
600
395
360
315
2500
300
300
180
165
140
350
350
240
220
190
400
400
265
240
210
600
600
370
335
295
100
600
600
530
480
420
700
700
700
645
560
800
800
775
705
615
1100
1100
1080
980
855
1400
1400
1400
1295
1130
Speed (R.P.M.)
Radial Load (Pounds)
500
1000
1500
600
530
460
530
420
365
310
245
215
280
220
195
245
195
170
700
700
620
700
560
490
415
330
285
375
300
260
330
260
225
800
775
680
775
615
540
455
360
315
410
325
285
360
285
250
1100
1080
940
1080
855
750
630
500
435
570
455
395
500
395
345
1400
1400
1245
1400
1130
990
835
660
580
755
600
525
660
525
460
1800
435
385
200
180
160
585
460
270
245
215
640
505
295
270
235
885
700
410
375
325
1175
930
545
495
430
2000
420
330
195
175
155
560
445
260
235
205
615
490
285
260
225
855
680
395
360
315
1130
895
525
475
415
2500
390
310
180
165
140
520
415
240
220
190
570
455
265
240
210
795
630
370
335
295
1050
835
485
440
385
PS2 and PS3 Series Flanged Units
Shaft
Sizes
1/2
5/8
3/4
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4S
1-1/4
1-5/16
1-3/8
1-7/16
236
Average
Life (L50)
Hours
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
50
600
600
600
600
530
700
700
700
700
700
800
800
800
800
775
1100
1100
1100
1100
1080
1400
1400
1400
1400
1400
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Mounted Ball Bearing Radial Load Capacities
XL, S, H, L, F, T and MB Series
Series
XL All
S (All)
H-L-F-T
Shaft
Size
MB
(All)
Shaft
Size
1/2
5/8
—
3/4
—
7/8
15/16
1
—
1-1/8
1-5/16
1-1/4S
—
1-1/4
1-5/16
1-3/8
1-7/16
—
1-1/2
1-7/16
1-5/8
1-11/16
1-3/4
1-1/2
1-15/16
1-11/16
1-3/4
2
2-3/16
1-15/16
2
2-1/4
2-7/16
2-3/16
2-1/4
—
2-7/16
2-1/2
—
2-11/16
—
2-15/16
3
—
3-3/16
3-1/4
—
3-7/16
3-1/2
P-1930-BG
04/10
Speed (R.P.M.)
Radial Load (Pounds)
Average
Life (L50)
Hours
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
2,500
5,000
7,500
15,000
75,000
50
1580
1255
730
665
580
1930
1530
895
810
710
2115
1675
980
890
775
2955
2340
1370
1245
1085
3890
3085
1805
1635
1430
4935
3915
2290
2080
1815
5295
4200
2455
2230
1950
5295
4200
2455
2230
1950
6545
5190
3035
2755
2410
7910
6275
3670
3330
2910
9395
7455
4630
3955
3455
9990
7925
4635
4210
3675
11720
9300
5400
4935
4315
12630
10020
5860
5320
4645
14500
11505
6730
6110
5335
100
1255
995
580
525
460
1530
1215
710
645
560
1675
1330
775
705
615
2340
1855
1085
985
860
3085
2445
1430
1300
1135
3915
3105
1815
1605
1440
4200
3330
1950
1770
1545
4200
3330
1950
1770
1545
5190
4120
2410
2190
1910
6275
4975
2910
2645
2310
7455
5910
3455
3140
2740
7925
6285
3675
3340
2915
9300
7375
4315
3920
3420
10020
7945
4645
4225
3685
11505
9125
5335
4850
4235
500
730
580
340
305
270
895
710
415
375
330
980
775
455
410
360
1370
1085
635
575
505
1805
1430
835
760
665
2290
1815
1060
965
845
2455
1950
1140
1035
905
2455
1950
1140
1035
905
3035
2410
1410
1280
1120
3670
2910
1700
1545
1350
4360
3455
2020
1835
1605
4635
3675
2150
1950
1705
5440
4315
2525
2290
2000
5860
4645
2720
2470
2160
6730
5335
3120
2835
2480
1000
580
460
270
245
210
710
560
330
300
260
775
615
360
325
285
1085
860
505
455
400
1430
1135
665
600
525
1815
1440
845
765
665
1950
1545
905
820
715
1950
1545
905
820
715
2410
1910
1120
1015
885
2910
2310
1350
1225
1070
3455
2740
1605
1455
1270
3675
2915
1705
1550
1350
4315
3420
2000
1820
1585
4645
3685
2160
1960
1710
5335
4235
2480
2250
1965
1500
505
400
235
210
185
620
490
285
260
225
680
540
315
285
250
945
750
440
400
350
1250
990
580
525
460
1585
1260
735
665
585
1700
1350
790
715
625
1700
1350
790
715
625
2100
1670
975
885
775
2540
2020
1180
1070
935
3020
2400
1400
1270
1110
3210
2550
1490
1350
1180
3765
2990
1750
1585
1385
4055
3225
1885
1710
1495
4660
3700
2165
1965
1715
1800
475
375
220
200
175
585
460
270
245
215
640
505
295
270
235
890
705
415
375
325
1175
930
545
495
430
1495
1180
690
630
550
1600
1270
740
675
590
1600
1270
740
675
590
1980
1570
915
835
725
2390
1805
1110
1010
880
2840
2250
1315
1200
1045
3020
2395
1400
1275
1110
3545
2810
1645
1495
1305
3820
3025
1770
1610
1405
4385
3475
2035
1850
1615
2000
460
365
210
195
170
560
445
260
235
205
615
490
285
260
225
860
680
400
360
315
1135
900
525
475
415
1440
1140
665
605
530
1545
1225
715
650
570
1545
1225
715
650
570
1910
1515
885
805
705
2310
1830
1070
970
850
2740
2175
1270
1155
1010
2915
2310
1350
1230
1075
3420
2715
1585
1440
1260
3685
2925
1710
1555
1360
4235
3355
1965
1785
1560
2500
425
340
195
180
155
520
415
240
220
190
570
455
265
240
190
800
635
370
335
295
1055
835
490
445
385
1335
1060
620
565
490
1435
1140
665
605
530
1435
1140
665
605
530
1775
1410
825
745
655
2145
1700
995
905
790
2545
2020
1180
1075
940
2705
2150
1255
1140
995
3175
2525
1475
1340
1170
3420
2720
1590
1445
1260
3930
3120
1825
1655
1450
3000
400
320
185
170
150
490
390
225
205
180
540
425
250
225
200
750
595
350
315
275
990
785
460
415
365
1260
1000
585
530
465
1350
1070
625
570
500
1350
1070
625
570
500
3600
375
300
175
160
140
460
365
215
195
170
505
400
235
210
185
705
560
325
295
260
930
740
430
390
340
1180
940
550
500
435
4000
365
290
170
155
135
445
355
205
185
165
490
385
225
205
180
685
540
315
285
250
900
715
415
380
330
4500
350
275
160
145
130
430
335
200
180
155
470
370
215
195
170
655
515
305
275
240
5000
340
270
155
140
125
415
330
190
175
150
455
360
210
190
165
These ball bearings will also accommodate
thrust loads of up to 50% of the radial load
ratings listed with no resultant decrease in
the radial load capacity. For ratings higher
than 5000 RPM, consult Factory.
Boston Gear 800-825-6544
237
F
Engineering Information
Application Data – Unmounted Bearings
Lubrication
F
Precautions
Either oil or grease can be used for lubricating bearings.
Boston bearings are supplied slushed (open bearings)
with a rust inhibiting oil, or prepacked with grease
(sealed or shielded bearings) at the factory. However,
special purpose lubricants can be used when required.
It is recommended that bearing selection include
consideration of the lubricant specifications and
whether the lubricant will be applied in service or
prepacked at the factory. Good lubrication adds
measurably to the life of a bearing.
1. Keep bearings clean and protected with covering
until ready to install.
2. Make preliminary examination of shaft and housing for
correct window size. Also check for chips, filings and
burrs.
3. Press inner race on shaft or outer race in housing
preferably by use of arbor press. Never transmit
mounting press forces through balls from one race
to the other.
4. Avoid hammer blows.
Recommended Shaft Fits — 1600-3000-7500-7600 Series
Bearing
Bore
Max.
.2500
.3125
.3750
.4375
.5000
.6250
.7500
.8750
1.0000
1.1250
1.2500
Min.
.2495
.3120
.3745
.4370
.4995
.6245
.7495
.8745
.9995
1.1245
1.2405
Shaft Rotating
Shaft
Theoretical
Diameter
Fit
Max.
Min.
Tight
Loose
.2500
.2495
.0005
.0005
.3125
.3120
.0005
.0005
.3750
.3745
.0005
.0005
.4375
.4370
.0005
.0005
.5000
.4995
.0005
.0005
.6250
.6245
.0005
.0005
.7500
.7495
.0005
.0005
.8752
.8747
.0007
.0003
1.0002
.9997
.0007
.0003
1.1252
1.1247
.0007
.0003
1.2502
1.2497
.0007
.0003
Shaft Stationary
Shaft
Theoretical
Diameter
Fit
Max.
Min.
Tight
Loose
.2495
.2490
.0000
.0010
.3120
.3115
.0000
.0010
.3745
.3740
.0000
.0010
.4370
.4365
.0000
.0010
.4995
.4990
.0000
.0010
.6245
.6240
.0000
.0010
.7495
.7490
.0000
.0010
.8745
.8740
.0000
.0010
.9995
.9990
.0000
.0010
1.1245
1.1240
.0000
.0010
1.2495
1.2490
.0000
.0010
Recommended Housing Fits — 1600-3000-7500-7600 Series
Bearing
Outside
Diameter
Max.
Min.
.6875
.6870
.8750
.8745
.9063
.9058
1.1250
1.1245
1.3750
1.3745
1.6250
1.6245
1.7500
1.7495
2.0000
1.9994
2.5000
2.4994
2.5625
2.5619
Housing Rotating
Housing Inside
Theoretical
Diameter
Fit
Max.
Min.
Tight
Loose
.6877
.6870
.0005
.0007
.8752
.8745
.0005
.0007
.0965
.9058
.0005
.0007
1.1252
1.1242
.0008
.0007
1.3752
1.3742
.0008
.0007
1.6252
1.6242
.0008
.0007
1.7502
1.7492
.0008
.0007
2.0002
1.9990
.0010
.0008
2.5002
2.4990
.0010
.0008
2.5627
2.5615
.0010
.0008
Housing Stationary
Housing Inside
Theoretical
Diameter
Fit
Max.
Min.
Tight
Loose
.6880
.6875
.0000
.0010
.8755
.8750
.0000
.0010
.9068
.9063
.0000
.0010
1.1255
1.1250
.0000
.0010
1.3755
1.3750
.0000
.0010
1.6258
2.6250
.0000
.0013
1.7508
1.7500
.0000
.0013
2.0010
2.0000
.0000
.0016
2.5010
2.5000
.0000
.0016
2.5635
2.5625
.0000
.0016
Note: 3000 Series Dim Are Nom. +.0005
7600 Series Dim Are Nom. +.0008
238
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Application Data – Mounted Bearings
Lubrication
Boston Gear ball and tapered roller bearing Pillow
Blocks and Flanged Cartridges are factory lubricated
prior to shipping. Those designed with the relubrication
feature periodically require grease during operation. The
interval between relubrication and the amount
necessary to insure a long operational life are
determined by the specific application.
Mounting
Setscrew Locking Type
Housing should be fastened to the mounting structure.
Back out setscrews to clear shaft. After lubricating the
shaft, slide it through the bearings and tighten
setscrews to recommended torque, see Table below.
Loading, speed, and environmental conditions must be
considered when determining the proper interval
between relubrication.
Eccentric Locking Collar Type
Weeks
Hours
1251- 501- 751- 1001- 1501- 2001- 2501
Operated
250
500 750 1000 1500 2000 2500 3000
Per Day
RPM RPM RPM RPM RPM RPM RPM RPM
8
12
12
10
7
5
4
3
2
16
12
7
5
4
2
2
1
1
24
10
5
3
2
1
1
1
1
Turn eccentric collar “A” in the direction in which the
shaft will rotate. Hand tight is often sufficient but a
spanner wrench or drift pin may be inserted in spanner
wrench hole “C” and used to set the collar (Note: DO
NOT USE A DIRECT HAMMER BLOW to set the collar
as such a blow may fracture the inner ring.) Not
recommended for severe reversing applications.
The table above may be used as a guide for establishing
lubrication intervals for applications where
contamination is not present.
For unusual operating conditions not covered by the
table, consult the factory for our recommendations.
Normal bearing operation temperatures range from
“cool-to-the-touch” to “too-hot-to-touch” for more than
a few seconds, depending on the load, speed, and
ambient temperature.
The type of grease used in Boston bearing units allows
satisfactory operation at temperatures to 225°F and
speeds to 6500 RPM.
When sliding the shaft through the bore bearing inner
ring, be sure that the counterbore of eccentric collar “A”
is toward eccentric boss “B” on inner ring.
Tighten set screw in eccentric collar firmly against shaft
to recommended torque, see Table below.
Set
Screw
Diameter
1/4
5/16
3/8
7/16
1/2
5/8
Hex Width
Across
Flats
1/8
5/32
5/16
7/32
1/4
5/16
Tightening
Torque
(In.-Lbs.)
70
140
220
350
515
1200
Bearings are prelubricated with a No. 2 consistency
lithium base grease, and it is recommended that the Lith
EP-2 or an equivalent grease be used when
relubrication is requierd. When relubricating bearings, it
is preferable that the shaft be rotating. This rotation of
the shaft will aid in preventing excessive filling and
insure proper distribution of the grease.
Grease should be added slowly to the bearing. When a
slight bead appears from under the seal, the bearing will
usually contain the proper amount of lubricant.
Precautions
The shaft must be clean, straight and free from nicks and
burns and should fit the bearing as snugly as possible.
Recommended shaft tolerance — Low Speed (or Light
Load) +.0 to –.002; Normal Speed (or Load) +.0 to –.001;
High Speed (or Heavy Load) a light press fit is desirable.
The use of flats at setscrew locations will permit ease of
shaft removal.
P-1930-BG
04/10
NOTE: PS, PS2 and PS3 series: It is particularly
important on these units that shaft be in place
before the housing is secured to the mounting
structure. The self-aligning steel stampings
clamp the outer race when bolts are tightened
making further shaft alignment impossible.
Boston Gear 800-825-6544
239
F
Notes
F
240
Boston Gear 800-825-6544
P-1930-BG
04/10
Chains
G
Section Contents
ROLLER CHAINS
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Multi-Strand Selection Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Transmission Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Conveyor Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Heavy Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Engineering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246-249
Roller Chain Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Hollow Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
BLOCK CHAINS
Selection Charts/Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
LEAF (CABLE) CHAINS
Selection Charts/Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
LADDER CHAINS
Selection Charts/Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
MINIATURE ROLLER CHAINS
Selection Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
CHAIN PULLERS/CHAIN BREAKING TOOLS
Selection Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
P-1930-BG
04/10
Boston Gear 800-825-6544
241
Roller Chains
Description of Roller Chain Parts
Chain Dimensions
Principal dimensions of roller chain which identify the chain definitely are pitch, roller width, roller diameter
and pin diameter.
G
PITCH is the linear distance from center to center of adjacent pins or rivets.
WIDTH is the distance between inside plates or length of roller.
DIAMETER is the actual outside diameter of roller (or pin).
Chain Types
Chain Links
Boston Roller chains can be furnished in two types
— RIVETED and DETACHABLE.
RIVETED TYPE
Riveted type chains are recommended
for high speed drives, as a greater
rigidity of the pins and side plates is
secured from this construction.
Rivited type is considered standard on
the smaller sizes up to and including
3/4 “ pitch and will be supplied unless
Detachable type is specified.
Detachable type chain is not
recommended up to and including 5/8”
pitch, but is available in cotter pin
construction in 3/4” pitch.
DETACHABLE (Cottered) TYPE
Detachable type chains are
recommended for slower speed drives,
especially in the larger pitches where
ease of assembly and disassembly
becomes an important factor.
Detachable type with cotter pins is
considered standard on all sizes 1”
pitch and above and will be supplied
unless riveted type is specified. Both
types are available.
242
Boston Gear 800-825-6544
CONNECTING LINK
(Spring Clip)
Standard for Nos. 25, 35, 40, 41, 50 and
60 single and multiple-width chains.
CONNECTING LINK
(Cotter Pin)
Standard for Nos. 80, 100, 120, 140, and
160, 200 and 240 single and multiplewidth chains.
ROLLER LINK
Furnished as complete assemblies, roller
links are standard for all chain sizes. The
same roller links are used for single and
multiple-width chains.
ONE PITCH OFFSET LINK
(For standard service)
For use whenever chain length contains an
odd number of pitches. These links are
standard for all chain sizes in single or
multiple-widths. (Not available for 25 pitch.)
TWO PITCH OFFSET LINK
(For severe service)
Consists of a roller link and an offset link
riveted together. Two pitch offset
assemblies should be specified for severe
service.
P-1930-BG
04/10
Roller Chains
Ordering Information
STEEL – SINGLE STRAND
Chain
Pitch &
Number
Standard
Package
Quantities
Catalog
Number
10' PKG.
100' REEL
250' REEL
500' REEL
10' PKG.
100' REEL
250' REEL
500' REEL
10' PKG
100' REEL
250' REEL
10' PKG
100' REEL
250' REEL
500' REEL
10' PKG
10' PKG
100' REEL
250' REEL
10' PKG
100' REEL
10' PKG
10' PKG
50' REEL
10 PKG
1/4"-25*
3/8" - 35*
1/2" - 40
1/2" - 41
1/2" - 43
5/8" - 50
3/4" - 60
1" - 80
1-1/4" - 100
1-1/2" - 120
1-3/4" - 140
2" - 160
2-1/4" - 180
2-1/2" - 200
3" - 240
25 - 10'
25 100'
25 - 250'
25 - 500'
35 - 10'
35 - 100'
35 - 250'
35 - 500'
40 - 10'
40 - 100'
40 - 250'
41 - 10'
41 - 100'
41 - 250'
41 - 500'
43 - 10'
50 - 10'
50 - 100'
50 - 250'
60 RIV - 10'
60 RIV - 100'
60 DET -10'
80 RIV - 10'
80 RIV - 50'
80 DET - 10'
100 RIV - 10'
10’ PKG
100 DET - 10'
120 RIV - 10'
10' PKG
120 DET - 10'
140 RIV - 10'2-1/2"
10'2-1/2" PKG 140 DET - 10'2-1/2"
160 RIV - 10'
10' PKG
160 DET - 10'
180 RIV - 10'
10' PKG
180 DET - 10'
200 RIV - 10'
10' PKG
200 DET - 10'
240 RIV - 5'
5' PKG
240 DET - 5'
Item
Code
Standard
Package
Quantities
68948
69010
68950
68951
68953
68954
68955
68956
68959
68960
68961
68964
68965
68966
68967
68947
68984
68985
68986
68989
68990
68991
68808
29948
68812
68936
68937
68940
68941
30440
30438
30462
30460
50219
30478
31066
30488
50210
58927
1/4" - 25-3*
3/8" - 35-3*
1/2" - 40-3
5/8" - 50-3
10' PKG
10' PKG
10' PKG
10' PKG
STEEL - DOUBLE STRAND
1/4" - 25-2*
3/8" - 35-2"
1/2" - 40-2
5/8" - 50-2
3/4" - 60-2
1" - 80-2
1-1/4" - 100-2
1-1/2” - 120-2
1-3/4" - 140-2
2" - 160-2
2-1/4" - 180-2
2-1/2" - 200-2
3" - 240-2
P-1930-BG
10' PKG
10' PKG
10' PKG
10' PKG
25-2-10'
35-2-10'
40-2-10'
50-2-10'
60-2 RIV - 10'
10' PKG
60-2- DET - 10'
80-2 RIV - 10'
10' PKG
80-2 DET - 10'
100-2 RIV - 10'
10' PKG
100-2 DET - 10'
120-2 RIV - 10'
10' PKG
120-2 DET - 10'
10'2-1/2" PKG 140-2RIV-10'2-1/2"
140-2DET-10'2-1/2"
160-2 RIV - 10'
10' PKG
160-2 DET - 10'
10' PKG
180-2 DET-10'
200-2 RIV-5'
5' PKG
200-2 DET-5'
5' PKG
04/10
240-2 DET-5'
HEAVY SERIES‡
STEEL – TRIPLE STRAND
Chain
Pitch &
Number
45886
69011
69014
69017
69020
68935
68813
68816
68938
68939
68942
68943
06085
30448
50209
30470
31014
50220
30496
3/4" - 60-3
1" - 80-3
1-1/4" - 100-3
1-1/2" - 120-3
1-3/4" - 140-3
2" - 160-3
2-1/4" - 180-3
2-1/2" - 200-3
3" - 240-3
Catalog
Number
25-3-10'
35-3-10'
40-3-10'
50-3-10'
60-3- RIV - 10'
10' PKG
60-3 DET - 10'
80-3 RIV - 10'
10' PKG
80-3 DET - 10'
100-3 RIV - 10'
10' PKG
100-3 DET - 10'
120-3 RIV - 10'
10' PKG
120-3 DET - 10'
10'2-1/2" PKG 140-3DET-10'2-1/2"
5' PKG
160-3 DET-5'
5' PKG
180-3 DET-5'
5' PKG
200-3 DET-5'
5' PKG
240-3 DET-5'
Item
Code
45890
69057
69060
69063
69066
68934
68818
68822
69081
69082
69083
69087
31142
31148
31160
30966
58304
10' PKG
10' PKG
10' PKG
3/4" - 60-4
10' PKG
1" - 80-4
10' PKG
1-1/2" - 120-4
1-3/4" 140-4
2" - 160-4
2-1/2" - 200-4
10' PKG
5' PKG
5' PKG
5' PKG
35-4-10'
40-4-10'
50-4-10'
60-4 RIV - 10'
60-4 DET - 10'
100-4 RIV - 10'
100-4 DET - 10'
120-4 DET - 10'
140-4 DET - 5'
160-4 DET - 5'
200-4 DET - 5'
Standard
Package
Quantities
3/4" - 60H
10' PKG
1" - 80H
1-1/4" - 100H
1-1/2" - 120H
1-3/4" - 140H
2" - 160H
2-1/2" - 200H
Catalog
Number
Item
Code
60H RIV - 10'
60H DET - 10'
10' PKG
80H RIV - 10'
80H DET - 10'
10' PKG
100H RIV - 10'
100H DET - 10'
10' PKG
120H RIV - 10'
120H DET - 10'
10'2-1/2" PKG 140HRIV-10'2-1/2"
140HDET-10'2-1/2"
10' PKG
160H RIV - 10'
160H DET - 10'
10' PKG
200H DET - 10'
68994
68981
69077
60979
30958
30956
06401
30960
50218
30962
30234
30964
58293
STANDARD CUT-TO-LENGTH CHAIN
STEEL - QUAD STRAND
3/8" - 35-4*
1/2" - 40-4
5/8" - 50-4
Chain
Pitch &
Number
68839
68842
68843
68932
68933
50216
31136
31184
31190
31154
31172
—48 HOUR SERVICE—
UP TO 50 STRANDS
Contact factory for larger quantities
No extra charge for this service!
STAINLESS STEEL
3/8" - 35*
1/2" - 40
5/8" - 50
3/4" - 60
10' PKG
100' REEL
10' PKG
10' PKG
10' PKG
10' PKG
1" - 80
10' PKG
1/4" - 25*
25SS - 10'
25SS - 100'
35SS - 10'
40SS - 10'
50SS - 10'
60SS - 10'
80SS RIV - 10'
80SS DET - 10'
58285
69056
30078
30134
30272
30328
13493
30366
NICKEL PLATED
1/4" - 25*
3/8" - 35*
1/2" - 40
5/8" - 50
3/4" - 60
1" - 80
10' PKG
100' REEL
10' PKG
100' PKG
10' PKG
100' REEL
10' PKG
100' REEL
250' REEL
10' PKG
100' REEL
10' PKG
25NP - 10'
25NP - 100'
35NP - 10'
35NP - 100'
40NP - 10'
40NP - 100'
50NP - 10'
50NP - 100'
50NP - 250'
60NP - 10'
60NP - 100'
80NP - 10'
68709
68710
68713
68714
68718
68719
68723
68724
68725
68723
68729
68732
Item Code
30000
30042
30098
30236
30292
30224
68973
Chain Pitch
Quantity
#25
#35
$40
#50
#60
#80
#41
cut to length
cut to length
cut to length
cut to length
cut to length
cut to length
cut to length
* Non Roller
‡ Heavy Series chain has thicker link plates to resist shock
from pulsating loads.
58301
Boston Gear 800-825-6544
243
G
Roller Chains
ANSI Standard
Double, Triple and Quadruple Widths Dimensions
ALL DIMENSIONS IN INCHES
Chain Pitch
Number
C
B
E A
H
T
G
G
F
PITCH
C
H
E
A
B
T
G
F
PITCH
C
H
E
A
B
T
G
F
PITCH
H
E
C
T
A
B
G
F
PITCH
E
H
Roller
Diam.
SINGLE WIDTH
25*
1/4 .125 .130
35*
3/8 .187 .200
40
1/2 .312 .312
S41
1/2 .250 .306
50
5/8 .375 .400
60
3/4 .500 .468
80
1
.625 .625
100 101/4 .750 .750
120 1-1/2 1.000 .875
140 1-3/4 1.000 1.000
160
2
1.250 1.125
180 2-1/4 1.406 1.406
200 2-1/2 1.500 1.562
240
3
1.875 1.875
DOUBLE WIDTH
25-2* 1/4 .125 .130
35-2* 3/8 .187 .200
40-2
1/2 .312 .312
50-2
5/8 .375 .400
60-2
3/4 .500 .468
80-2
1
.625 .625
100-2 1-1/4 .750 .750
120-2 1-1/2 1.000 .875
140-2 1-3/4 1.000 1.000
160-2
2
1.250 1.125
180-2 2-1/4 1.406 1.406
200-2 2-1/2 1.500 1.562
240-2
3
1.875 1.875
TRIPLE WIDTH
25-3* 1/4 .125 .130
35-3* 3/8 .187 .200
40-3
1/2 .312 .312
50-3
5/8 .375 .400
60-3
3/4 .500 .468
80-3
1
.625 .625
100-3 1-1/4 .750 .750
120-3 1-1/2 1.000 .875
140-3 1-3/4 1.000 1.000
160-3
2
1.250 1.125
180-3 2-1/4 1.406 1.406
200-3 2-1/2 1.500 1.562
240-3
3
1.875 1.875
QUADRUPLE WIDTH
25-4* 1/4 .125 .130
35-4* 3/8 .187 .200
40-4
1/2 .312 .312
50-4
5/8 .375 .400
60-4
3/4 .500 .468
80-4
1
.625 .625
100-4 1-1/4 .750 .750
120-4 1-1/2 1.000 .875
140-4 1-4/4 1.000 1.000
160-4
2
1.250 1.125
180-4 2-1/4 1.406 1.406
200-4 2-1/2 1.500 1.562
240-4
3
1.875 1.875
Pin Average Avg.
Diam. Ultimate Weight
Strength Per Ft.
G
Lbs.
Lbs.
A
B
C
T
F
.31
.47
.65
.51
.79
.98
1.28
1.54
1.94
2.08
2.48
2.81
3.02
3.76
.19
.34
.42
.37
.56
.64
.74
.91
1.14
1.22
1.46
1.74
1.86
2.27
.15
.23
.32
.26
.40
.49
.64
.77
.97
1.04
1.24
1.40
1.51
1.88
.030
.050
.060
.050
.080
.094
.125
.156
.187
.218
.250
.281
.312
.375
.23
.36
.46
.39
.59
.70
.93
1.16
1.38
1.63
1.88
2.13
2.32
2.80
.0905
930
.141
2,300
.156
3,700
.141
2,580
.200
6,400
.234
8,700
.312 15,500
.375 24,000
.437 34,000
.500 46,000
.562 58,000
.687 80,000
.781 95,000
.937 130,000
.104
.21
.41
.28
.69
.96
1.60
2.56
3.60
4.90
6.40
8.70
10.30
16.90
.56
.86
1.20
1.49
1.87
2.42
2.94
3.72
4.00
4.80
5.40
5.86
7.22
.31
.50
.67
.82
1..02
1.32
1.62
2.04
2.19
2.63
2.94
3.28
4.00
.28
.43
.60
.75
.93
1.21
1.47
1.86
2.00
2.40
2.70
2.93
3.61
.030
.050
.060
.080
.094
.125
.156
.187
.218
.250
.281
.312
.375
.23
.36
.46
.59
.70
.93
1.16
1.38
1.63
1.88
2.13
2.32
2.80
.0905
.141
.156
.200
.234
.312
.375
.437
.500
.562
.687
.781
.937
1,860
4,600
7,400
12,800
17,400
31,000
48,000
68,000
92,000
116,000
160,000
190,000
260,000
.20
.41
.81
1.35
1.90
3.15
5.00
7.10
9.50
17.60
17.60
21.00
33.10
.81
1.26
1.78
2.20
2.75
3.58
4.35
5.52
5.94
7.10
8.00
8.68
10.70
.44
.70
.96
1.17
1.46
1.90
2.33
2.94
3.16
3.78
4.22
4.70
5.74
.41
.63
.89
1.10
1.37
1.79
2.18
2.76
2.97
3.55
4.00
4.34
5.35
.030
.050
.060
.080
.094
.125
.156
.187
.218
.250
.281
.312
.375
.23
.36
.46
.59
.70
.93
1.16
1.38
1.63
1.88
2.13
2.32
2.80
.0905
.141
.156
.200
.234
.312
.375
.437
.500
.562
.687
.781
.937
2,790
6,900
11,100
19,200
26,100
46,500
72,000
102,000
138,000
174,000
240,000
285,000
390,000
.30
.60
1.20
2.05
2.75
4.80
7.30
10.70
15.00
19.40
26.50
31.00
49.20
1.06
1.65
2.33
2.91
3.64
4.73
5.76
7.30
7.86
9.40
10.58
11.50
14.14
.56
.90
1.24
1.53
1.90
2.47
3.03
3.83
4.12
4.93
5.52
6.10
7.47
.53
.83
1.17
1.45
1.82
2.37
2.88
3.65
3.93
4.70
5.29
5.75
7.07
.030
.050
.060
.080
.094
.125
.156
.187
.218
.250
.281
.312
.375
.23
.36
.46
.59
.70
.93
1.16
1.38
1.63
1.88
2.13
2.32
2.80
.0905
.141
.156
.200
.234
.312
.375
.437
.500
.562
.687
.781
.937
3,720
9,200
14,800
25,600
34,800
62,000
96,000
136,000
184,000
232,000
320,000
380,000
520,000
.45
.82
1.60
2.75
3.70
6.40
9.80
14.20
20.00
25.00
35.00
41.50
65.00
*Non-Roller
244
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chains
Transmission/Conveyor/Heavy Series
Double Pitch Dimensions
Transmission Series
ALL DIMENSIONS IN INCHES
E
H
Chain
Number Pitch Width Dia.
2040
2050
2060
2080
2100
1
1-1/4
1-1/2
2
2-1/2
.312
.375
.500
.625
.750
A
.312
.400
.468
.625
.750
B
.65
.79
.98
1.28
1.54
Avg.
Avg.
T
G Ultimate Wgt.
Thick- F
Pin Strgth. Per
ness
Dia. (Lbs.) Foot
Lbs.
.060 .46 .156 3,700
.30
.080 .59 .200 6,100
.45
.094 .69 .234 8,500
.68
.125 .88 .312 14,500 1.11
.156 1.16 .375 24,000 1.94
C
.42
.56
.64
.74
.91
.32
.40
.49
.64
.77
C
H
E
A
B
T
G F
PITCH
Conveyor Series
OVERSIZE ROLLERS
C
H
STANDARD ROLLERS
A
C
E
B
H
A
E
B
T
G
T
G
F
F
PITCH
PITCH
ALL DIMENSIONS IN INCHES
H
Chain
Number
Pitch
C2040
C2050
C2060H
C2080H
C2100H
C2120H
C2160H
1
.312
1-1/4 .375
1-1/2 .500
2
.625
2-1/2 .750
3
1.000
4
1.250
E
OverSize
Roller
.625
.750
.875
1.125
1.562
1.750
2.250
Std.
Roller
.312
.400
.468
.625
.750
.875
1.125
A
B
C
T
F
G
Avg.
Ultimate
Strgth.
(Lbs.)
.65
.79
1.11
1.41
1.67
2.07
2.60
.42
.56
.65
.80
.98
1.21
1.52
.32
.40
.55
.70
.83
1.03
1.30
.060
.080
.125
.156
.187
.218
.281
.46
.59
.69
.88
1.15
1.37
1.87
.156
.200
.234
.312
.375
.437
.562
3,700
6,100
8,500
14,500
24,000
34,000
58,000
Avg. weight per foot
(Lbs.)
OverThermoStd.
size
plastic
Roller
Roller
Roller
.32
.55
.33
.53
.84
.54
.92
1.40
.94
1.52
2.21
1.52
2.30
3.75
—
3.70
5.71
—
5.85
8.93
—
Heavy Series
ALL DIMENSIONS IN INCHES
Chain
Number Pitch
60H
80H
100H
120H
140H
160H
180H
200H
E
H
3/4 .500 .468
1 .625 .625
1-1/4 .750 .750
1-1/2 1.000 .875
1-3/4 1.0001.000
2 1.2501.125
2-1/4 1.4061.406
2-1/2 1.5001.562
P-1930-BG
04/10
A
B
C
T
F
G
Avg.
Ultimate
Strgth.
(Lbs.)
1.11
1.41
1.67
2.07
2.20
2.60
2.95
3.63
.65
.80
.98
1.21
1.28
1.52
1.75
2.02
.55
.70
.83
1.03
1.10
1.30
1.48
1.66
.125
.156
.187
.218
.250
.281
.312
.375
.680
.930
1.156
1.375
1.625
1.875
2.130
2.312
.234
.312
.375
.437
.500
.562
.687
.781
8,500
14,500
24,000
34,000
46,000
58,000
80,000
95,000
Avg.
Wgt.
Per
Foot
Lbs.
1.14
1.93
3.06
4.45
5.68
7.33
9.10
13.50
Boston Gear 800-825-6544
245
G
Engineering Information
Conveyor Chain Selection
Single or Double Pitch, Flat-Top and
Hollow Pin Chain
In order to select a chain for a conveyor application, the
Velocity and maximum Chain Pull must be established.
The total pull may be obtained if the Torque and Sprocket PD
are known, or if the Horsepower and Velocity can be
determined.
Chain Pull, W = 2T
D
W = 33000 P
V
G
W = 126050 P
nD
{
W = Chain Pull, Lbs.
T = Torque, In. Lbs.
D = Sprocket PD, Inches
P = Horsepower
V = Chain Velocity, FPM
n = Sprocket Speed, RPM
If a pair of chains are used, the pull on each chain will be half
of the total chain pull.
Having determine the Chain Pull, refer to Chain Load Rating
Charts on Page 247 and select a chain with a capacity equal
to or greater than the Chain Pull Required.
To Calculate Chain Length (L):
For Single Pitch Chain
L = 2C + N
For Double Pitch & Flat-Top Chain
L = 2C + N
—
2
where:
L = Chain Length, Pitches
C = Center Distance, Pitches
N = Number of Teeth in One Sprocket*
The computed value of L must be rounded out to a larger
whole number of pitches (links) for each complete chain. Any
whole number of links is satisfactory for Hinge-Top Chain but
an even number should be selected for Single or Double Pitch
or Flat-Top Chains.
To obtain the center distance or chain length in inches, the
value in pitches should be multiplied by the chain pitch.
Example 1. Selecting a Double Pitch Conveying Chain.
The power required to move material at 50 FPM is 1
Horsepower on a Conveyor with a Center Distance of 10 ft.
Step I: Determine Chain Pull:
W = 33,000 P = 33000 x 1 = 660 Lbs.
V
50
Step II: Refer to Conveyor Chain Load Rating Chart, page
165. Select a double pitch chain with a Working Load
equal to or greater than 660 lbs. at 50 FPM.
Selection — C2050 (1.25” Pitch) with 5/8 pitch
sprockets 50B25 (or larger).
246
Boston Gear 800-825-6544
Step III: Determine Chain Length in Pitches. Convert Center
Distance (10 feet) to pitches.
C = 10 x 12 = 96 Pitches
1.25
Chain Length (L) = 2C + N
2
Chain Length (L) = 2 x 96 + 25 = 204.5
2
Adjust to next larger even whole number.
Chain Length (L) = 206 Pitches
*Assuming same size Driver and Driven Sprockets.
Single Pitch & Double Pitch Chain
For horizontal conveyor applications where the HP or Torque
data is not available, the approximate Chain Pull can be
calculated from the Weight to be moved (product and cha
in) and the Coefficient of Friction (between sliding surfaces
of chain and supporting ways).
For Normal operation:
Chain Pull
W = (M = 2m) Cf
W = Chain Pull Lbs.
M = Product Weight, Lbs. per Ft.
m = Chain Weight, Lbs. per Ft.
C = Conveyor Length (between Centers), Ft.
f = Coefficient of Friction (see Table).
For trial purposes,
let m = 1.0 for other conveyor chains.
Note: The estimated weight of pins and/or attachments (per
foot of chain) should be included in chain weight.
Whenever the product becomes stalled on a moving
conveyor, the chain pull is increased. The Added Pull
depends on the Stalled Weight (of product) and the
Coefficient of Friction (between surfaces of product and
chain).
For stalled product:
Added Chain Pull,
w = Mlf
w = Added Chain Pull, Lbs.
M = Product Weight, Lbs. per Ft.
l = Length of Stalled Product, Ft.
f = Coefficient of Friction (see Table).
For Stalled condition:
Total Chain Pull = W = w, Lbs.
If a pair is used, the pull on each chain will be half of the total
chain pull.
P-1930-BG
04/10
Engineering Information
Conveyor Chain Selection (Continued)
Example 2. A horizontal conveyor 25 Ft. long is to move a
product weighing 200 Lbs. per Ft. at 20 FPM. Two FT2060
Flat-Top chains will be used, if possible, with the thermoplastic
plates supported on metal ways without lubrication.
Chain Pull,
W = (M + 2m) Cf
M = 200 Lbs. per Ft.
m = 1.41 x 2 = 2.82 (two chains)
C = 25 Ft.
f = .25 + .15 = .40 (for starting with load)
W = (200 + 5.64) 25 x .40 = 2056 Lbs.
The maximum working load of FT2060 chain at 20 FPM is
1170 Lbs. (see table) and this will be adequate if the product
cannot become stalled.
Note: Whenever two strands of chain are used, the total chain
weight will be double the single strand weight, (per foot).
COEFFICIENT OF FRICTION FOR CONVEYOR CHAIN
Plate
Material
Stainless
Steel
High
ImpregStainless Carbon
Density
Delrin Nylon
nated
Steel
Steel
PolyWood
ethylene
Dry
Water
Soap & Water
Carbon Steel
Dry
Water
Soap
Acetal Plastic
Dry
Water
Soap & Water
Nylon
Dry
Water
Soap & Water
.41
.35
.20
.41
.35
.20
.30
.25
.25
.35
.30
.20
.15
.12
.08
.11
.11
.11
.41
.35
.20
.39
.35
.20
.30
.25
.15
.35
30
.20
.15
.12
.08
.11
.11
.11
.30
.25
.15
.30
.25
.15
.20
.20
.10
.35
.30
.20
.35
.30
.20
.25
.25
.12
CHAIN LOAD RATING CHART
Chain Numbers
Single
Pitch
Double
Pitch
Velocity
of
Chain
(FPM)
25
50
75
100
125
150
175
200
225
250
275
300
Pitch
35*
40
50
60
80
100
120
160
C2040 C2050 C2060 C2080 C2100 C2120 C2160
Maximum Working Load or
Chain Pull (Lbs.)
250
443
690
995 1770 2760 3990
243
432
675
970 1730 2690 3880
233
414
645
930 1660 2580 3720
220
391
610
880 1570 2440 3520
206
366
570
820 1460 2280 3290
190
338
528
760 1350 2110 3040
175
311
485
700 1240 1940 2800
160
284
444
640 1140 1770 2560
146
259
405
584 1040 1620 2340
133
236
368
530
940 1470 2120
120
214
333
480
855 1330 1920
110
195
305
440
780 1220 1760
Standard Pitch Boston Sprockets To Operate
With Above Chain
3/8”
1/2”
5/8”
3/4”
1”
7100
6900
6630
6250
5850
5400
4970
4550
4150
3770
3310
3120
1-1/4” 1-1/2”
2”
*No. 35 Chain is a Rollerless Chain.
†For Hollow Pin chains, the working load (chain pull) should be multiplied by
1.3 to obtain the proper value for use in selecting the chain pitch required.
Flat Top Conveyor Chain
MAXIMUM WORKING LOAD OR CHAIN PULL (LBS.)
Chain
Type
0-10
Chain Velocity — Feet Per Minute
20
30
40
50
FT2060
1070
1045
1035
1030
1025
70
1015
MAXIMUM WORKING LOAD OR CHAIN PULL (LBS.)
SINGLE PITCH
ROLLER CHAIN WITH
ATTACHMENTS
DOUBLE PITCH
ROLLER CHAIN WITH
ATTACHMENTS
To select the proper chain, the working load or chain pull and
the chain speed in feet per minute must be known. Using this
information find the proper chain in the chart.† These load
ratings are based on proper installation, lubrication and
steady load conditions.
The minimum permissible number of sprocket teeth is 15 for
single pitch, and 24 for double pitch chain. For smoother
operation, sprockets with greater numbers of teeth than the
minimum are recommended.
P-1930-BG
04/10
Chain
Type
100
FT2060
1005
Chain Velocity — Feet Per Minute
150
200
250
300
960
915
855
670
400
435
LUBRICATION - To assure maximum chain life, carbon and
stainless steel chains should be lubricated wherever possible.
Soap lubrication is recommended. Several detergent and
nonalkali fluid types are on the market. Water lubrication
should be used when no other lubricant can be tolerated.
Drip-type systems and wheel-type and sponge-type
applicators are on the market.
Delrin chain tends to be self-lubricating, although wear life can
be extended with the use of a lubricant, such as soap and
water.
Boston Gear 800-825-6544
247
G
Engineering Information
Conveyor Chain Working Load
At speeds of normal conveyor operation (less than 500
feet per minute), chains are selected on the basis of safe
working load, rather than horsepower capacity. Working
load or chain pull of conveyor series chains is calculated
by multiplying the total combined weight of the chain,
plus the conveyed material in any run, by the appropriate
coefficient of friction. In general, the maximum working
load for a conveyor chain will be higher than that
determined for similar chains from a horsepower rating
table. The higher load is permitted because there are
usually fewer load cycles on a conveyor chain, compared
to a power transmission drive. In order to minimize wear,
permissible working loads of conveyor chains are
reduced as speeds increase. See the working load table
below.
G
COEFFICIENT OF FRICTION—DOUBLE PITCH ROLLER CHAINS
Chain
Number
C-2040,
C-2050,
C-2060H,
C-2080H,
C-2100H,
C-2120H,
C-2160H,
C-2042
C-2052
C-2062H
C-2082H
C-2102H
C-2122H
C-2162H
Chain with Large Size
Chain with Standard Size
Rollers and Rolling
Rollers and Sliding
Friction
Friction
*Static
Rolling
*Static
Sliding
Dry Lubricated Dry Lubricated Dry Lubricated Dry Lubricated
0.17
0.12
0.14
0.10
0.16
0.11
0.13
0.09
0.16
0.11
0.13
0.09
0.15
0.10
0.12
0.08
.33
.24
.27
.21
0.14
0.09
0.11
0.07
0.14
0.09
0.11
0.07
0.13
0.08
0.10
0.07
Horizontal Conveyor
P=
LF (2W + M)
N
L
Inclined Conveyor
A factor must be added to or subtracted from the chain
load to compensate for raising or lowering the conveyed
load on an inclined installation. This factor may be
calculated by multiplying the weight of conveyed load by
the vertical change in feet, and dividing y the horizontal
run of the conveyor in feet.
P=
LF (2W + M) cos φ ÷ LM sin φ
N
φ = ARC tan
V
L1
L
V
L1
*For chain speed of 3 feet per minute or less
RECOMMENDED MAXIMUM WORKING LOADS
Chain
Number
C-2040, C-2042
C-2050, C-2052
C-2060H,C-2062H
C-2080H,C-2082H
C-2100H,C-2102H
C-2120H,C-2122H
C-2160H,C-2162H
Pitch
in
Inches
5
25
1
1 1/4
1 1/2
2
2 1/2
3
4
530
870
1215
2070
3425
4855
8585
525
865
1205
2055
3400
4815
8210
Chain Speed, feet per minute
50
75 100 200 300
Maximum Working Load, Lbs.
510
840
1170
2000
3310
4690
8000
490
805
1125
1915
3175
4495
7670
465
765
1065
1815
3000
4250
7250
335
555
775
1320
2180
3090
5275
230
380
530
905
1500
2125
3625
400
500
160
265
370
630
1040
1480
2520
115
190
265
455
750
1065
1815
Calculate the working load for horizontal, inclined,
vertical and carousel conveyors, substituting the
following values in the appropriate formulas:
P = Chain pull or working load
S = Speed in feet per minute
L = Length of conveyor in feet between sprocket
centers
T = Total chain length in feet
V = Vertical rise in feet
F1 = Coefficient of friction, sliding
F2 = Coefficient of friction, rolling
W = Weight of chain and attachments per foot in
pounds
M = Weight of conveyed product per foot in pounds
N = Number of chain strands
248
Boston Gear 800-825-6544
Vertical Conveyor
P=
L (M + W)
N
L
Carousel Conveyor (Plan View) for
Crescent Top Chains
P=
TF (W + M) + (TMF)
N
Note: (TMF) is the length of stalled product.
P-1930-BG
04/10
Engineering Information
Roller Chain Formulas
Horsepower
Sprocket Speed
Horsepower equals 33,000 foot-pounds per minute, or
550 foot-pounds per second. In terms of chain working
load or pull (P) and speed:
RPM =
12 x RPM
Number of Teeth x Pitch
HP =
PxS
33,000
RPM of Driven Sprocket =
Driver Teeth x Driver RPM
Driven Teeth
HP =
P x Number of Teeth x Pitch x RPM
396,000
RPM of Driver Sprocket =
Driven Teeth x Driven RPM
Driver Teeth
HP =
Torque (lb.-in.) x RPM
63,025
Centrifugal Pull or Tension
G
Pull or tension caused by chain weight and velocity:
Torque (lb.-in.) x RPM
5,252
HP =
Chain Weight per Foot x (FPM)2
115,900
Centrifugal Pull =
Ratio
Ratio =
Teeth in Large Sprocket
Teeth in Small Sprocket
or
Fast RPM
Slow RPM
Total Chain Tension
Total Chain Tension = Working Load + Centrifugal Pull
Chain Bearing Pressure
Chain Working Load
Bearing Pressure
(pounds per square inch) =
When horsepower input is known, calculate for chain
working load or pull (P):
P=
HP x 33,000
FPM
Working Load
Bushing Length x Pin Dia.
Torque
Torque =Sprocket Pitch Radius x Working Load
P=
HP x 396,000
Number of Teeth x Pitch x RPM
Torque (lb.-in.) =
HP x 63,025
RPM
P=
Torque
Sprocket Pitch Radius
Torque (lb.-ft.) =
HP x 5,252
RPM
Chain Speed
Factory of Safety
Pitch x Number of Teeth x RPM
Speed (FPM) =
12
FS=
P-1930-BG
04/10
Chain Ultimate Strength
Chain Working Load
Boston Gear 800-825-6544
249
Notes
G
250
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chain Attachments
Ordering Procedure
Double Pitch Roller Chains
Attachments may be ordered as separate links or assembled in chains.
WHEN ORDERING SEPARATE ATTACHMENT LINKS, THE FOLLOWING
DATA MUST BE GIVEN:
1. Chain Number and Attachment Number.
2. Connecting Link or Roller Link.
WHEN ORDER ATTACHMENTS ASSEMBLED* IN CHAIN, THE
FOLLOWING INFORMATION MUST BE SUPPLIED:
Double Pitch Chain Attachments
1. Chain Number and Attachment Number.
2. Spacing between Attachment Centers (Pitches or Inches). This must be a
multiple of the chain pitch.
3. If spacing is an even number of pitches, attachments will be assembled as
pin links unless roller link style is specified.
4. If spacing is an odd number of pitches, assembly will normally be supplied
with alternate pin and roller link attachments. For attachments to be on pin
(or roller) links only, an offset link must be assembled in each interval.
G
*Riveted assembly will be supplied unless detachable links are specified.
ANSI Standard Roller Chains
Standard Roller Chain Attachments
P-1930-BG
04/10
Boston Gear 800-825-6544
251
Roller Chains
Hollow Pin
Single and Double Pitch
Boston Gear Hollow Pin Chain is identical to ANSI Roller Chain in pitch, roller
width and roller diameter. It is quality designed for long wear life in conveyor
applications. The “hollow pin” feature provides unlimited conveyor design
versatility. Stud, bushed design. Bushing diameter is same as comparable roller
chain.
ORDER BY CATALOG NUMBER OR ITEM CODE
Chain Pitch
Standard
Catalog
and
Package
Number
Number
Quantities
SINGLE PITCH
1/2" – 40HP
40HP – 20'
5/8" – 50HP
50 HP – 20'
20' Pkg.
3/4" – 60 HP
60 HP – 20"
1" – 80 HP
80 HP – 20'
DOUBLE PITCH — STANDARD ROLLERS
1" – C2040HP
C2040HP – 20'
1-1/4" – C2050HP
C2050 HP – 20'
20' Pkg.
1-1/2" – C2060 HP
C2060 HP – 20"
2" – C2080 HP
C2080 HP – 20'
DOUBLE PITCH — OVERSIZE ROLLERS
1" – C2042HP
C2042HP – 20'
1-1/4" – C2052HP
C2052 HP – 20'
20' Pkg.
1-1/2" – C2062 HP
C2062 HP – 20"
2" – C2082 HP
C2082 HP – 20'
G
Item
Code
31088
31092
31096
31100
31104
31108
31112
31116
31104
31108
31112
31116
C
C
H
A
E
H
T
A
E
B
B
T
G
G
F
F
PITCH
PITCH
DIMENSIONS IN INCHES
Chain
Pitch
Single
1/2
5/8
3/4
1
252
Double
1
1-1/4
1-1/2
2
E
H
A
B
C
T
F
G
.312
.375
.500
.625
.312
.400
.469
.625
.65
.79
.97
1.22
.37
.46
.57
.70
.32
.40
.49
.61
.060
.080
.094
.125
.46
.59
.69
.88
.158
.203
.237
.318
Boston Gear 800-825-6544
Average
Ultimate
Strength
(Lbs.)
2500
3700
6100
8500
Average
Weight
Per Foot (Lbs.)
Single
Double
.38
.31
.63
.51
.88
.75
1.56
1.33
P-1930-BG
04/10
Block Chain
Block Chain*
ORDER BY CATALOG NUMBER OR ITEM CODE
Chain
Number
B503
B504
B505
B506
Standard Package
Quantities
Catalog
Number
B503-25’
B504-25’
B505-25’
B506-25’
25’ Pkg.
Item
Code
30602
30608
30614
30620
STAINLESS STEEL Block Chain available on Special Order. Contact Factory.
ALL DIMENSIONS IN INCHES
Chain
No.
B503
B504
B505
B506
From
From
Pin Head Pin Head
Pitch W
to
to
C/L
C/L
A
B
1 1/4 7/32
17/64
1 5/16 9/32
5/16
1 3/8 5/16
11/32
1 1/2
3/8
13/32
Over-All
Width
C
Riv.
7/16
9/16
5/8
3/4
Sp Cl
31/64
19/32
21/32
25/32
Link
Plate
Thickness
T
0.060
0.080
0.080
0.080
Pin
Dia.
E
Average
Weight
Per Foot,
(Lbs.)
0.170
0.187
0.187
0.187
0.3
0.4
0.4
0.5
G
*Refer to Page 290 for Block Chain Sprockets
Leaf (Cable) Chain
Boston Leaf Chains are designed for tension linkage applications such as
counterweight chains for machine tools, elevator and oven doors, fork lift truck
masts, spinning frames, i.e. applications to lift or pull where it is not necessary to
engage a sprocket.
Leaf chains normally run over sheaves and are attached to clevises at each end.
Because of the wide variation in clevis designs, leaf chains are furnished less the
end pins.
Not recommended for new applications.
ORDER BY CHAIN NUMBER AND LENGTH IN FEET
Chain
Pitch
Lacing
A
G
H
T
1/2
1/2
1/2
5/8
5/8
5/8
3/4
3/4
3/4
1
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
1-1/2
1-3/4
1-3/4
1-3/4
2
2
2
2x3
3x4
4x6
2x3
3x4
3x4
2x3
3x4
4x6
2x3
3x4
4x6
2x3
3x4
4x6
2x3
3x4
4x6
2x3
3x4
4x6
2x3
3x4
4x6
.50
.67
.92
.58
.78
1.07
.76
1.02
1.41
.94
1.26
1.41
1.12
1.60
2.08
1.27
1.73
2.42
1.46
1.98
2.76
1.68
2.22
4.17
.200
.200
.200
.234
.234
.234
.312
.312
.312
.375
.375
.375
.437
.437
.437
.500
.500
.500
.562
.562
.562
.687
.687
.687
.455
.455
.455
.585
.585
.585
.708
.708
.708
.950
.950
.950
1.160
1.160
1.160
1.380
1.380
1.380
1.620
1.620
1.620
1.830
1.830
1.830
.080
.080
.080
.094
.094
.094
.125
.125
.125
.156
.156
.156
.187
.187
.187
.220
.220
.220
.250
.250
.250
.281
.281
.281
P-1930-BG
04/10
Average
Weight
Chain
Ultimate
Per Foot Number
Strength (Lbs.) (Lbs.)
6,000
.48
BL-423
9,000
.64
BL-434
12,000
.93
BL-446
9,000
.74
BL-523
13,200
1.03
BL-534
18,000
1.46
BL-546
13,200
1.15
BL-623
20,400
1.60
BL-634
26,400
2.30
BL-646
22,800
1.91
BL-823
34,800
2.66
BL-834
45,600
3.78
BL-846
31,200
2.95
BL-1023
49,200
4.07
BL-1034
62,400
5.79
BL-1046
40,800
4.15
BL-1223
66,000
5.82
BL-1234
81,600
8.27
BL-1246
51,600
5.57
BL-1423
85,200
7.73
BL-1434
103,200
11.01 BL-1446
78,000
7.51
BL-1623
118,800
10.45 BL-1634
156,000
14.85 BL-1646
When ordering chain with odd number of pitches specify
whether male or female end link required.
Boston Gear 800-825-6544
253
Ladder Chain
Steel–Stainless Steel–Brass
An effective, low-cost means of transmitting motion where load (torque) is not a
critical factor.
In addition to stock-listed sizes and materials, ladder chain can be furnished
pre-assembled into endless lengths to customer specifications or pre-cut to
desired lengths.
Ladder chain may be made into endless loops by opening the two eyes of one
end link with needle-nosed pliers to permit entry of the other end link and then
closing the open eyes.
Ladder chain can be furnished on a made-to-order basis made endless, with
special plating. Consult the factory for prices.
ORDER BY CATALOG NUMBER OR ITEM CODE*
G
B
Chain
Number
1AA
Miniature
Standard package
Quantities
1
50' Pkg.
1A
50' Pkg.
2
50' Pkg.
2-1/2
50' Pkg.
*
D
Catalog
Number
Item
Code
1AA Stainless Steel
54941
1 BRASS—50'
1 HITEN—50'
1 STEEL—50'
1 SS—50'
1A BRASS—50'
1A HITEN—50'
1A STEEL—50'
1A SS—50'
2 BRASS—50'
2 HITEN—50'
2 STEEL—50'
2 SS—50'
2A BRASS—50'
2A HITEN—50'
2A STEEL—50'
2A SS—50'
31200
31208
31216
46847
31202
31210
31218
46848
31204
31212
31220
46849
31206
31214
31222
46850
*To order Miniature Ladder Chain, specify Item Code and Number of Feet required. For Sprockets to
run with this Chain, see Miniature Roller Chain Sprockets, Page 266.
ALL DIMENSIONS IN INCHES
A
Links
Chain per Foot
Number (Approx.)
C
E
1AA
1A
1
2
2-1/2
82
65
42
34
34
A
Min.
Max.
.1465
.1840
.2846
.3514
.3507
.1485
.1852
.2869
.3546
.3553
B
C
D
E
Min. Max. Max. ±.0005
.079
.115
.125
.180
.195
.229
.315
.350
.480
.565
—
.072
.091
.115
.155
.031
.041
.047
.054
.080
Weight Per
100 Ft. (Lbs.)
Steel
Brass
—
2.85
3.38
4.20
10.30
—
3.06
3.04
4.50
11.10
Load Data
Approx. Yield Point
Approx. HP at 500 RPM
(In Pounds)
Chain
Steel
Steel
Number
High Stain- Brass
High Stain- Brass
Untreated Tensile less
Untreated Tensile less
1A
20
40
20
15
1/6
1/3
1/6
1/8
1
40
70
25
25
1/4
1/2
3/16
1/6
2
50
90
35
30
1/3
3/4
1/4
1/4
2-1/2
75
140
65
45
1/2
1
7/16
1/3
Ratings for 1AA Chain will be furnished on request.
254
Boston Gear 800-825-6544
P-1930-BG
04/10
Miniature Roller Chains
Stainless Steel – Single Strand Riveted
MATERIAL: Stainless Steel Type 18-8
FINISH: Clear Passivated
AVERAGE TENSILE LOAD: 180 lbs.
WEIGHT: .035 lbs. per foot
G
ORDER BY CATALOG NUMBER OR ITEM CODE
Item
Number
54919
54920
54921
54922
54923
54924
54925
54926
54927
54928
54929
54930
54931
54932
54933
54934
54935
54936
54937
54938
Catalog
Number
15SS50
15SS60
15SS70
15SS80
15SS90
15SS100
15SS110
15SS120
15SS130
15SS140
15SS150
15SS160
15SS170
15SS180
15SS190
15SS200
15SS210
15SS220
15SS230
15SS240
No. of
Links
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
Length
7.375
8.850
10.325
11.800
13.275
14.750
16.225
17.700
19.175
20.650
22.125
23.600
25.075
26.550
28.035
29.500
30.975
32.450
33.925
35.400
NOTE: Sizes not listed are available on request.
All lengths include and are supplied with connecting link
15SS C/L
PRICED PER FOOT
Item
Catalog
Number Number
54939
Material
6M-7-MS Nylatron GS
CONNECTING LINK
Catalog Number Item Code
54942
P-1930-BG
04/10
15SS C/L
P
Pitch
Links
per
Foot
Weight
per
Foot
.1475
81.3
.093 oz.
BUSHING LINK
Catalog Number Item Code
54943
15SS B/L
Boston Gear 800-825-6544
255
Chain Pullers
The Boston Chain Puller was designed to make roller chain
installation quick and easy.
To use: (1) hook the two jaws into each end of the chain; (2)
turn the screw until the two ends almost meet; (3) insert the
connecting link and fasten.
ORDER BY CATALOG NUMBER OR ITEM CODE
Chain
Sizes
Nos. 35-60
80-240
Jaw
Spread
2"
5"
Catalog
Number
TH35-60
TH80-240
Item
Code
10784
10788
G
Chain Breaking Tools
These Boston Chain Breaking Tools will disconnect any
riveted roller chain manufactured to ANSI specifications, up to
and including No. 100 (1-1/4” pitch).
Tool steel replaceable punch point, tempered for long life.
ORDER BY CATALOG NUMBER OR ITEM CODE
Chain
Sizes
Nos. 25-60
60-100
256
Boston Gear 800-825-6544
Catalog
Number
CBT-60
CBT-100
Item
Replaceable Points
Code Catalog Number Item Code
06800 XCBT 60-5
06808
63526 XCBT 100-5
63587
P-1930-BG
04/10
Sprockets
H
Section Contents
ROLLER CHAIN DRIVES
General Description ..................................................................................................................258-259
Horsepower Ratings Charts.....................................................................................................260-262
Selection Charts ........................................................................................................................263-265
MINIATURE CHAIN SPROCKETS
Catalog Number Selections/Dimensions .......................................................................................266
ROLLER CHAIN SPROCKETS
Catalog Number Selections/Dimensions................................................................................267-289
BLOCK CHAIN SPROCKETS
Catalog Number Selections/Dimensions .......................................................................................290
LADDER CHAIN SPROCKETS
Catalog Number Selections/Dimensions................................................................................291-292
ROLLER CHAIN DRIVE TENSIONERS
Catalog Number Selections/Dimensions................................................................................293-296
IDLER SPROCKETS
Catalog Number Selections/Dimensions .......................................................................................293
P-1930-BG
04/10
Boston Gear 800-825-6544
257
Chain Drives
Roller Chain Sprockets
Boston roller chain sprockets are quality designed and built to ANSI
specifications for superior fatigue resistance and long operational life in a host of
industrial and process applications. Sprockets are available in a wide range of
materials and pitches, with or without hubs.
Types and Styles
Type A – No Hub
Boston standard Type A sprockets are stocked for all single
strand Roller Chains up to 1" Pitch (#80 Chain).
Type B – Single Hub
Boston Steel—Type B Stock Bore sprockets are stocked for all
single strand Roller Chains up to 1" Pitch (#80 Chain) and for
double strand Roller Chains in 3/8, 1/2, 5/8 and 3/4" Pitches.
H
Boston Stainless Steel—Type B Stock Bore sprockets are
stocked for single strand Roller Chain in 1/4, 3/8, and 1/2"
pitches.
Boston Steel—Type B Bored-to-Size sprockets are stocked for
single strand Roller Chain in 1/4, 3/8, 1/2, 5/8, 3/4, and 1" pitches.
Boston Type B sprockets are solid (one piece) construction in
small sizes, and two-piece design in larger numbers of teeth,
see Chart.
Pitch
Size
25
35
41
40
50
60
80
Solid
up to
25B30
35B25
41B20
40B20
50B16
60B16
80B14
Two-Piece
starting at
25B32
35B26
41B21
40B21
50B17
60B17
80B15
Roller Chain Drive Selection
The following considerations are very important in the
selection and application of roller chain drives:
HORSEPOWER RATINGS—This catalog lists Horsepower
Ratings for ANSI Series, single pitch, single strand chains No.
25 through No.160 (and lightweight machinery series No. 41).
Ratings are listed for various numbers of teeth and speeds of
smaller sprocket. Ratings for intermediate numbers of teeth or
RPM may be determined by interpolation. The ratings reflect
a service factor of 1, a chain length of approximately 100
pitches, the use of recommended lubrication methods and a
drive arrangement where two aligned sprockets are mounted
on parallel horizontal shafts. For maximum service life,
sprockets with small numbers of teeth, operating at moderate
to high speeds or near the rated horsepower should have
hardened teeth. Approximately 15,000 hours of service life at
full load operation may be expected under these conditions.
258
Boston Gear 800-825-6544
NO. OF TEETH—It is good practice to select a pinion
sprocket with no less than 17 Teeth, to assure 120° of chain
wrap and minimize overhung load. However, certain
conditions, i.e., space limitations, light loads, intermittent duty,
etc. will permit the use of smaller pinions.
RATIO—Sprocket ratios should not exceed about 6 to 1 for
normal chain life.
HARDENED TEETH—Boston Gear steel sprockets can be
hardened. Consult the factory for recommended procedure.
CENTER DISTANCE—The correct center distance is very
important. In designing chain drives, it is important that the
Center Distance should be long enough to provide at least
120° of chain wrap on the smaller sprocket.
RELATIVE SHAFT LOCATIONS—It is desirable that the line
between the two shaft centers be as nearly horizontal as
possible. If this line is more than 60° from the horizontal,
special precautions should be taken.
P-1930-BG
04/10
Chain Drives
Roller Chain Drive Selection (Continued)
A roller chain consists essentially of numerous small bearings
operating under high pressures and requires adequate
lubrication. There are four basic types of lubrication suggested
for chain drives, depending upon the chain speed and the
power transmitted. The Horsepower Rating Tables indicate the
type of lubrication recommended.
Type I—Manual Lubrication
Manual lubrication is accomplished by applying oil with a brush
or spout can to the inside of the chain at the edges of the side
plates. Volume and frequency should be determined by
periodic inspection.
TYPE II—Drip Lubrication
Oil is directed between link plate edges to a drip lubricator. Only
enough oil to keep the chain moist is necessary and a light metal
splash guard will keep the floor and surroundings clean.
TYPE III—Bath or Disc Lubrication
With bath lubrication, the lower strand of the chain runs
through a sump of oil. The oil level should reach the pitch line
of the chain at its lowest point while operating. With disc
lubrication, the chain operates above the oil level. The disc
picks up oil from the sump and deposits it on the chain, usually
by means of a trough. The disc diameter should be such as to
produce rim speeds from 600 minimum to 8000 maximum
FPM. This type of lubrication requires that the drive be
enclosed in an oil tight chain case.
TYPE IV—Oil Stream Lubrication
The lubricant is usually supplied by a circulating pump capable of
supplying the chain drive with a continuous stream of oil. The oil
should be applied inside the chain loop evenly across the chain
width, and directed at the lower strand. This type of lubrication
requires that the drive be enclosed in an oil tight chain case.
Recommended lubricant viscosities for various ambient
temperatures are listed in the following table:
Temp.
Degrees F.
20-40
40-100
Temp.
Degrees F.
100-120
120-140
Lubricant
SAE20
SAE30
Lubricant
SURROUNDING CONDITIONS—Abrasive, corrosive, or high
temperature conditions can shorten chain life. If adverse
conditions exist, special precautions should be taken. It may
be advisable to use a drive with higher capacity than normal,
stainless steel chain, etc.
Roller chain drives may be selected with the following
procedure:
a. From Table #1 of the Application Classification Chart on
Pages 323-324 determine the Service Factor.
b. Multiply the Application HP by the Service Factor to obtain a
Design HP.*
c. The Selection Table below may be used to select an
appropriate chain size using a sprocket of 17 teeth or larger.
d. From the appropriate horsepower rating table (pages 260262 determine the minimum size sprocket needed to provide,
at the required speed, a rating equal to (or greater than) the
Design horsepower.
e. The Tables on pages 263-265 may then be used to select
number of sprocket teeth, shaft center distance and chain
length of a drive suitable for the application.
*For Stainless Steel Chains, operating under wet or dry
conditions, the Design Horsepower must be multiplied by a
Factor (see Table below) for selection purposes.
NOTE: Standard Steel Chains are not recommended for wet or
dry applications.
Application Conditions
Wet (Moisture)
Dry (Unlubricated)
Factor
2.0
5.0
Horsepower ratings of Multiple Strand chain may be obtained
by multiplying the Single Strand rating by the proper Factor
from the following table:
MULTIPLE STRAND RATING FACTORS
SAE-40
SAE50
Number of Strands
Rating Factor
Double
1.7
Triple
2.5
Quadruple
3.3
*These Horsepower Ratings are based on certain operating conditions, see Page 258.
SELECTION TABLE
RPM
Smaller
Sprocket
1800
1500
1200
1000
800
700
600
500
400
350
300
250
200
175
150
125
100
80
70
60
50
40
30
25
20
15
10
P-1930-BG
1/2
1
1-1/2
DESIGN HORSEPOWER
4
5
7-1/2
2
3
35
35
35
35
40
40
40
40
40
40
50
50
50
50
60
60
60
80
80
80
80
80
100
100
100
120
120
35
35
40
40
40
40
40
50
50
50
50
50
60
60
60
80
80
80
80
80
80
100
100
120
120
120
140
10
15
20
25
30
50
60
60
60
60
60
60
80
80
80
80
80
80
100
100
100
100
120
120
120
140
140
160
160
80
60
60
60
60
80
80
80
80
80
100
100
100
100
120
120
120
140
140
140
160
160
60–2
80
60
80
80
80
80
80
100
100
100
100
120
120
120
120
140
140
160
160
160
80–2
60–2
80
80
80
80
80
100
100
100
100
120
120
120
120
140
140
160
160
—
80–2
100
80
80
80
100
100
100
100
120
120
120
140
140
140
160
160
CHAIN NUMBER
25
25
25
25
25
25
35
35
35
35
35
35
35
40
40
40
40
40
50
50
50
50
60
60
60
80
80
04/10
25
25
35
35
35
35
35
35
35
40
40
40
40
40
50
50
50
50
60
60
60
60
80
80
80
100
100
35
35
35
35
35
35
35
40
40
40
40
40
50
50
50
50
60
60
60
80
80
80
80
80
100
100
120
40
40
40
40
40
50
50
50
50
50
60
60
60
80
80
80
80
80
80
100
100
100
120
120
120
140
140
40
40
40
40
50
50
50
50
60
60
60
60
80
80
80
80
80
100
100
100
100
120
120
140
140
160
40
40
50
50
50
50
60
60
60
80
80
80
80
80
80
100
100
100
120
120
120
120
140
140
160
Boston Gear 800-825-6544
259
H
Roller Chain Drives
Horsepower Ratings for ANSI Roller Chains
See Horsepower Ratings, page 259
Small
Sprocket
RPM
10
Teeth P.D.
12 .97" .007
15 1.20 .009
17 1.36 .011
19 1.52 .012
20 1.60 .013
Lubrication #
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 25-1/4” PITCH
20
30
50
75
.014
.018
.020
.023
.024
.020
.025
.029
.033
.035
.032
.040
.046
.052
.055
.046
.058
.066
.075
.079
Small
Sprocket
RPM
10
Teeth P.D.
11 1.33” .023
13 1.57 .027
15 1.80 .032
17 2.04 .037
19 2.28 .042
21 2.52 .046
23 2.75 .051
25 2.99 .055
Lubrication #
H
Small
Sprocket
RPM
10
Teeth P.D.
11 1.77” .030
13 2.09 .036
15 2.40 .042
17 2.72 .048
19 3.04 .054
21 3.35 .060
23 3.67 .066
25 3.99 .072
Lubrication #
Small
Sprocket
RPM
10
Teeth P.D.
11 1.77” .030
13 2.09 .036
15 2.41 .042
16 2.56 .045
18 2.88 .051
20 3.20 .057
22 3.51 .063
24 3.83 .069
Lubrication #
100 125 150 200 250 300 400 600 900 1200 1800 2500 3000 3500 4000
.059
.075
.086
.097
.103
.072
.092
.105
.119
.125
.085
.108
.124
.140
.148
Type I
.11
.14
.16
.18
.19
.24
.17
.20
.22
.23
.16
.20
.23
.26
.28
.21
.26
.30
.34
.36
.29
.38
.43
.49
.52
0.43
0.54
0.62
0.70
0.74
0.55
0.70
0.18
0.91
0.96
0.80
1.01
1.16
1.31
1.38
1.07 1.26
1.36 1.61
1.56 1.84
1.76 2.07
1.86 2.19
Type II
1.45
1.85
2.11
2.38
2.52
1.62
2.08
2.38
2.69
2.84
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 35-3/8” PITCH
20
30
50
75
100 125 150 200 250 300 400 600 900 1200 1500 1800 2500 3000
.043
.051
.060
.068
.077
.086
.095
.104
.062
.074
.086
.099
.111
.124
.137
.150
.098
.117
.136
.156
.176
.196
.217
.237
.14
.17
.20
.22
.25
.28
.31
.34
.18
.22
.26
.29
.33
.37
.41
.44
.22
.27
.31
.36
.40
.45
.49
.54
Type I
.26
.31
.37
.42
.47
.53
.58
.64
.34 .42
.41 .50
.47 .58
.54 .66
.61 .75
.68 .83
.75 .92
.82 1.01
.49
.59
.68
.78
.88
.98
1.09
1.19
.63
.76
.89
1.02
1.15
1.27
1.41
1.54
.91
1.09
1.28
1.46
1.65
1.84
2.03
2.22
1.32 1.72
1.59 2.05
1.85 2.40
2.12 2.75
2.39 3.10
2.66 3.45
2.94 3.81
3.21 4.16
Type II
2.08
2.49
2.91
3.33
3.76
4.19
4.62
5.06
2.47
2.96
3.45
3.95
4.46
4.97
5.48
6.00
3.32 2.93
3.98 3.76
4.64 4.66
5.31 5.63
5.99 6.65
6.68 7.73
7.37 8.68
8.06 9.50
Type III
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 41-1/2” PITCH
20
30
50
75
100
125
150
200
400
600
900 1200 1800 2400 3000
.056
.067
.078
.089
.100
.112
.124
.135
.080
.096
.112
.128
.145
.161
.178
.195
.13
.15
.18
.20
.23
.26
.28
.31
.18 .24
.22 .28
.26 .33
.29 .38
.33 .43
.37 .48
.41 .53
.44 .58
Type I
.29
.35
.40
.46
.52
.58
.64
.70
.34
.41
.48
.55
.62
.69
.76
.83
.44 .54 .64 .82
.53 .65 .76 .99
.62 .75 .89 1.15
.71 .86 1.02 1.32
.80 .97 1.15 1.49
.89 1.09 1.28 1.66
.98 1.20 1.41 1.83
1.07 1.31 1.55 2.00
Type II
250
300
1.19
1.42
1.66
1.90
2.14
2.39
2.64
2.88
1.71 1.71
2.05 2.20
2.39 2.73
2.74 3.29
3.09 3.89
3.44 4.46
3.79 4.92
4.15 5.38
Type III
.093
1.20
1.49
1.79
2.12
2.46
2.82
3.20
.060
0.78
0.96
1.16
1.38
1.60
1.83
2.08
Type IV
.043
0.56
0.69
0.83
0.98
1.14
1.31
1.49
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 43-1/2” PITCH
20
30
40
50
75
100
125
150
175
200
250
300
350
.056
.067
.078
.084
.095
.106
.118
.130
.080
.096
.112
.120
.137
.153
.170
.187
.11
.13
.15
.16
.18
.20
.23
.25
.13
.15
.18
.19
.22
.25
.27
.30
.18 .24
.22 .28
.26 .33
.28 .36
.31 .41
.35 .46
.39 .51
.43 .56
Type I
.29
.35
.40
.43
.49
.55
.61
.67
.34
.41
.48
.52
.59
.66
.73
.80
.39
.47
.55
.59
.67
.75
.83
.91
.44 .54 .64 .73
.53 .65 .76 .87
.62 .75 .89 1.02
.67 .81 .96 1.10
.76 .92 1.09 1.25
.85 1.03 1.22 1.40
.94 1.15 1.35 1.55
1.03 1.26 1.48 1.70
400
500
600
900
.82
.99
1.15
1.23
1.41
1.58
1.75
1.92
Type II
1.01
1.21
1.41
1.51
1.72
1.93
2.14
2.35
1.19
1.42
1.66
1.78
2.02
2.27
2.52
2.76
1.40
1.70
2.00
2.28
2.80
3.25
3.62
3.97
Type III
*See Page 259 for Multiple Strand Rating Factor.
#See Page 259 for Lubrication Details.
RATINGS FOR INTERMEDIATE NUMBERS OF TEETH OR RPM MAY BE OBTAINED BY INTERPOLATION.
260
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chain Drives
Horsepower Ratings for ANSI Roller Chains
See Horsepower Ratings, page 259
Small
Sprocket
RPM
10
Teeth P.D.
11 1.77 .054
13 2.09 .065
15 2.40 .076
17 2.72 .087
19 3.04 .098
21 3.35 .109
23 3.67 .120
25 3.99 .132
Lubrication #
Small
Sprocket
RPM
10
Teeth P.D.
11 2.22 .11
13 2.61 .13
15 3.01 .15
17 3.40 .17
19 3.80 .19
21 4.19 .21
23 4.59 .23
25 4.99 .26
Lubrication #
Small
Sprocket
RPM
10
Teeth P.D.
11 2.66 .18
13 3.13 .22
15 3.61 .25
17 4.08 .29
19 4.56 .33
21 5.03 .37
23 5.51 .40
25 5.98 .44
Lubrication #
Small
Sprocket
RPM
10
Teeth P.D.
11 3.55 .42
13 4.18 .51
15 4.81 .59
17 5.44 .68
19 6.08 .76
21 6.71 .85
23 7.34 .94
25 7.98 1.03
Lubrication #
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 40-1/2” PITCH
20
30
50
.10
.12
.14
.16
.18
.20
.22
.25
.15
.17
.20
.23
.26
.29
.32
.35
.23
.28.
.32
.37
.42
.46
.51
.56
75
100 125 150 200 250 300 400 500 600 900 1200 1500 1800 2400 3000
.33 .43
.40 .52
.46 .60
.53 .69
.60 .78
.67 .87
.74 .96
.81 1.05
Type I
.53
.63
.74
.84
.95
1.06
1.17
1.28
.62
.74
.87
.99
1.12
1.25
1.38
1.51
.80
.96
1.12
1.29
1.45
1.62
1.78
1.95
.98
1.18
1.37
1.57
1.77
1.98
2.18
2.38
1.16
1.39
1.62
1.85
2.09
2.33
2.57
2.81
1.50 1.84
1.80 2.20
2.10 2.56
2.40 2.94
2.71 3.31
3.02 3.69
3.33 4.07
3.64 4.45
Type II
2.16
2.59
3.02
3.45
3.90
4.34
4.79
5.24
3.11 4.03
3.73 4.83
4.35 5.64
4.98 6.45
5.62 7.27
6.26 8.11
6.90 8.94
7.55 9.78
Type III
4.93
5.91
6.89
7.89
8.89
9.91
10.9
12.0
4.66 3.03
5.99 3.89
7.43 4.82
8.96 5.82
10.5 6.88
11.7 7.99
12.9 9.16
14.1 10.4
Type IV
2.17
2.79
3.45
4.17
4.92
5.72
6.55
7.43
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 50-5/8” PITCH
20
30
50
75
.20
.24
.28
.32
.36
.40
.44
.48
.28
.34
.40
.45
.51
.57
.63
.69
Type I
.45
.54
.63
.72
.81
.90
1.00
1.09
.65
.78
.90
1.04
1.17
1.30
1.44
1.57
100 125 150 200 250 300 400 600 900 1200 1500 1800 2100 2400 2700
.84
1.01
1.17
1.34
1.51
1.69
1.86
2.04
1.03
1.23
1.43
1.64
1.85
2.06
2.27
2.49
1.21 1.56
1.45 1.87
1.69 2.19
1.93 2.50
2.18 2.82
2.43 3.15
2.68 3.47
2.93 3.80
Type II
1.91
2.29
2.67
3.06
3.45
3.85
4.24
4.64
2.25
2.70
3.15
3.60
4.06
4.53
5.00
5.47
2.92
3.50
4.08
4.67
5.27
5.87
6.48
7.09
4.21 6.07
5.04 7.26
5.88 8.48
6.73 9.70
7.59 10.9
8.46 12.2
9.33 13.4
10.2 14.7
Type III
7.86
9.42
11.0
12.6
14.2
15.8
17.4
19.1
7.44
9.56
11.9
14.3
16.9
19.3
21.3
23.3
5.58
7.17
8.89
10.7
12.7
14.7
16.9
19.1
4.42 3.62
5.67 4.65
7.03 5.76
8.48 6.95
10.0 8.22
11.6 9.55
13.3 10.9
15.1 12.4
Type IV
3.04
3.90
4.83
5.83
6.89
8.01
9.18
10.4
H
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 60-3/4” PITCH
20
30
.34 .49
.41 .58
.47 .68
.54 .78
.61 .88
.68 .98
.75 1.08
.82 1.18
Type I
50
75
.78
.93
1.08
1.24
1.40
1.56
1.72
1.88
1.11
1.33
1.55
1.78
2.01
2.24
2.47
2.70
100 125 150 200 250 300 400 600 900 1200 1400 16001800 2000 2200 2400
1.44 1.76 2.07
1.72 2.11 2.48
2.01 2.46 2.90
2.30 2.82 3.32
2.60 3.18 3.74
2.89 3.54 4.17
3.19 3.91 4.60
3.49 4.28 5.04
Type II
2.69
3.22
3.76
4.31
4.86
5.41
5.97
6.53
3.29
3.94
4.59
5.26
5.93
6.61
7.29
7.98
3.87 5.02
4.64 6.01
5.41 7.01
6.20 8.03
6.99 9.05
7.78 10.1
8.59 11.1
9.40 12.2
Type III
7.23 10.5
8.65 12.5
10.1 14.6
11.6 16.7
13.0 18.8
14.5 21.0
16.0 23.2
17.5 25.4
11.9
15.3
18.9
21.7
24.4
27.2
30.2
32.9
9.45 7.70 6.49
12.1 9.89 8.34
15.0 12.3 10.3
18.2 14.8 12.5
21.5 17.5 14.7
24.9 20.3 17.1
28.6 23.3 19.6
32.4 26.4 22.3
Type IV
5.51
7.08
8.77
10.6
12.5
14.5
16.7
18.9
4.78
6.14
7.61
9.18
10.9
12.6
14.4
16.4
4.20
5.39
6.68
8.06
9.52
11.1
12.7
14.4
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 80-1” PITCH
20
30
.79 1.14
.95 1.36
1.10 1.59
1.26 1.82
1.43 2.05
1.59 2.29
1.75 2.52
1.92 2.76
Type I
50
75
1.80
2.16
2.52
2.88
3.25
3.62
4.00
4.38
2.60
3.11
3.63
4.15
4.68
5.22
5.76
6.30
100 125 150 200 250 300 400 600 900 1000 1200 1400 1600 1800 2000 2200
3.36 4.11
4.03 4.92
4.70 5.75
5.38 6.58
6.07 7.42
6.76 8.27
7.46 9.12
8.17 9.98
Type II
4.84
5.80
6.77
7.75
8.74
9.74
10.7
11.8
6.28
7.51
8.77
10.0
11.3
12.6
13.9
15.2
7.67
9.19
10.7
12.3
13.8
15.4
17.0
18.6
9.04 11.7
10.8 14.0
12.6 16.4
14.5 18.7
16.3 21.1
18.2 23.6
20.0 26.0
21.9 28.4
Type III
16.9 23.0
20.2 29.1
23.6 34.0
27.0 38.9
30.4 43.8
34.0 48.9
37.4 53.9
40.9 59.0
19.6
25.2
31.2
37.6
44.5
51.7
59.2
64.9
14.9 11.8 9.69 8.12
19.2 15.2 12.5 10.4
23.8 18.9 15.4 12.9
28.7 22.7 18.6 15.6
33.9 26.9 22.0 18.4
39.4 31.2 25.6 21.4
45.1 35.8 29.3 24.6
51.1 40.6 33.2 27.8
Type IV
6.94
8.91
11.0
13.3
15.7
18.3
21.0
23.8
6.01
7.72
9.57
11.5
13.6
15.9
18.2
20.6
*See Page 259 for Multiple Strand Rating Factor.
#See Page 259 for Lubrication Details.
RATINGS FOR INTERMEDIATE NUMBERS OF TEETH OR RPM MAY BE OBTAINED BY INTERPOLATION.
P-1930-BG
04/10
Boston Gear 800-825-6544
261
Roller Chain Drives
Horsepower Ratings for ANSI Roller Chains
See Horsepower Ratings, page 259
Small
Sprocket
RPM
10
Teeth P.D.
11 4.44 .81
13 5.22 .97
15 6.01 1.13
17 6.80 1.30
19 7.59 1.46
21 8.39 1.63
23 9.18 1.80
25 9.97 1.97
Lubrication #
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 100-1-1/4” PITCH
20
30
1.51 2.18
1.81 2.61
2.12 3.05
2.42 3.49
2.73 3.93
3.04 4.38
3.36 4.84
3.67 5.29
Type I
Small
Sprocket
RPM
10 20
Teeth P.D.
11 5.324 1.37 2.56
13 6.268 1.64 3.06
15 7.215 1.91 3.57
17 8.164 2.19 4.09
19 9.114 2.47 4.61
21 10.064 2.75 5.13
Lubrication #Type I
H
50
75
3.45 4.97
4.13 5.96
4.82 6.95
5.52 7.96
6.23 8.98
6.94 10.0
7.65 11.0
8.37 12.1
Type II
100
125
150
200
250
300
400
500
600
6.44
7.72
9.00
10.3
11.6
12.9
14.3
15.6
7.88
9.43
11.0
12.6
14.2
15.8
17.5
19.1
9.28
11.1
13.0
14.9
16.8
18.7
20.6
22.5
12.0 14.7
14.4 17.6
16.8 20.6
19.2 23.5
21.7 26.5
24.2 29.6
26.6 32.6
29.2 35.7
Type III
17.3
20.7
24.2
27.7
31.2
34.8
38.4
42.0
22.4
26.9
31.4
35.9
40.5
45.1
49.7
54.4
27.4
32.8
38.3
43.9
49.5
55.1
60.8
66.5
32.3
38.7
45.2
51.7
58.3
64.9
71.7
78.4
900 1000 1200 1400
27.5 23.4
35.3 30.1
43.7 37.3
52.7 45.0
62.3 53.2
72.4 61.8
83.0 70.9
94.1 80.3
Type IV
17.8
22.9
28.4
34.3
40.5
47.0
53.9
61.1
14.2
18.2
22.5
27.2
32.1
37.3
42.8
48.5
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 120-1-1/2” PITCH
30
50
3.68
4.41
5.14
5.88
6.64
7.39
5.82
6.97
8.13
9.31
10.5
11.7
75
100 125 150 200 250 300 400 500 600 700 800 900
8.40 10.9
10.1 13.0
11.7 15.2
13.4 17.4
15.2 19.6
16.9 21.8
Type II
13.3
15.9
18.6
21.3
24.0
26.7
15.6
18.7
21.9
25.0
28.2
31.4
20.3 24.8
24.3 29.7
28.3 34.7
32.4 39.7
36.5 44.8
40.7 49.8
Type IV
29.2
35.0
40.8
46.7
52.7
58.7
37.8
45.3
52.9
60.5
68.2
76.0
46.3
55.4
64.6
74.0
83.4
93.0
54.5
65.3
76.1
87.2
98.3
110
46.3 37.9
59.5 48.7
73.8 60.4
89.0 72.8
105 86.1
122 100
Type IV
1000 1200
31.8
40.8
50.6
61.0
72.1
83.8
27.1
34.9
43.2
52.1
61.6
71.6
20.6
26.5
32.9
39.6
46.8
54.4
Small
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 140-1-3/4” PITCH
Sprocket
RPM
10
20
30
50
75
100 125
150 200 250 300 400 500 600 700 800
Teeth P.D.
11 6.211 2.13 3.97 5.72 9.06 13.1 16.9 20.7 24.4 31.5 38.6 45.5 58.9 72.0 65.8 52.4 42.9
13 7.312 2.55 4.74 6.83 10.9 15.6 20.3 24.7 29.2 37.8 46.2 54.4 70.5 86.2 84.6 67.3 55.1
15 8.417 2.98 5.56 8.01 12.7 18.3 23.7 28.9 34.1 44.1 54.0 63.6 82.4 101 105 83.4 68.3
17 9.523 3.41 6.36 9.16 14.5 20.9 27.1 33.1 39.0 50.5 61.7 72.8 94.2 115 126 100 82.4
19 10.632 3.84 7.17 10.3 16.0 23.5 30.5 37.3 44.0 57.0 70.0 82.1 106 130 149 119 97.4
21 11.742 4.28 7.98 11.5 18.2 26.2 34.0
41.5 49.0 63.4 77.6 91.4 118 145 171 138 113
Lubrication #
Type I
Type II
Type III
Type IV
Small
Sprocket
RPM
10
Teeth P.D.
11 7.099 3.07
13 8.357 3.67
15 9.620 4.28
17 10.884 4.90
19 12.151 5.53
21 13.419 6.16
Lubrication #Type I
900
35.9
46.2
57.2
69.1
81.6
94.8
HP RATINGS—STANDARD SINGLE * STRAND ROLLER CHAIN—NO. 160-2” PITCH
20
30
5.74 8.26
6.85 9.86
8.00 11.5
9.16 13.2
10.3 14.9
11.5 16.6
Type II
50
75
100
125
150
200
250
300
400
13.1
15.7
18.3
20.9
23.6
26.3
18.8
22.5
26.3
30.1
33.9
37.8
24.4
29.2
34.1
39.0
44.0
49.0
Type III
29.8
35.6
41.7
47.7
53.8
59.9
35.1
42.0
49.0
56.1
63.2
70.5
45.5
54.4
63.5
72.7
82.0
91.4
55.6
66.6
77.7
88.9
100
112
65.5 84.9
78.4 102
91.5 119
105 136
118 153
132 171
500
550
600
96.7
124
145
166
188
209
Type IV
83.9
108
134
161
190
220
73.5
94.4
117
141
166
194
*See Page 259 for Multiple Strand Rating Factor.
#See Page 259 for Lubrication Details.
RATINGS FOR INTERMEDIATE NUMBERS OF TEETH OR RPM MAY BE OBTAINED BY INTERPOLATION.
262
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chain Drives
Selection
SPEED RATIOS - CENTER DISTANCES - CHAIN LENGTHS
Teeth
Driven
Sprocket
15
16
17
18
19
20
21
22
23
24
25
30
32
35
36
40
42
45
Teeth on Driver Sprocket
11
12
13
14
15
1.36
6.469
26
1.45
7.207
28
1.55
7.943
30
1.64
7.669
30
1.73
8.404
32
1.82
8.124
32
1.91
8.857
34
2.00
9.590
36
2.09
9.304
36
2.18
10.037
38
2.27
9.744
38
2.72
11.345
44
2.91
12.812
48
3.18
13.976
52
3.27
13.668
52
3.64
15.561
58
3.82
15.983
60
4.09
17.139
64
1.25
7.235
28
1.33
6.971
28
1.42
7.710
30
1.50
8.446
32
1.58
8.174
32
1.67
8.909
34
1.75
8.632
34
1.83
9.365
36
1.92
10.098
38
2.00
9.815
38
2.08
10.547
40
2.50
12.161
46
2.66
12.597
48
2.92
13.761
52
3.00
14.495
54
3.34
15.349
58
3.50
15.773
60
3.75
16.930
64
1.15
6.993
28
1.23
7.736
30
1.31
7.473
30
1.38
8.212
32
1.46
8.949
34
1.54
8.679
34
1.61
9.414
36
1.69
9.139
36
1.77
9.872
38
1.85
10.605
40
1.92
10.324
40
2.31
11.943
46
2.46
12.379
48
2.69
13.546
52
2.77
14.279
54
3.08
15.136
58
3.23
16.605
62
3.46
16.719
64
1.07
7.748
20
1.14
7.494
30
1.21
8.237
32
1.29
7.975
32
1.36
8.714
34
1.43
9.452
36
1.50
9.183
36
1.57
9.918
38
1.64
9.645
38
1.72
10.378
40
1.79
11.112
42
2.14
12.746
48
2.28
13.188
50
2.50
14.361
54
2.57
14.063
54
2.86
15.961
60
3.00
16.391
62
3.22
17.553
66
1.00
7.500
30
1.07
8.249
32
1.13
7.994
32
1.20
8.737
34
1.27
8.477
34
1.33
9.216
36
1.40
9.955
38
1.47
9.686
38
1.53
10.422
40
1.69
10.150
40
1.67
10.884
42
2.00
12.522
48
2.14
12.967
50
2.33
14.141
54
2.40
14.874
56
2.67
15.746
60
2.80
16.177
62
3.00
17.340
66
16
1.00
8.000
32
1.06
8.749
34
1.13
8.495
34
1.19
9.238
36
1.25
8.978
36
1.31
9.718
38
1.37
10.457
40
1.44
10.189
40
1.50
10.926
42
1.56
10.654
42
1.88
12.299
48
2.00
13.765
52
2.19
13.921
54
2.25
14.653
56
2.50
15.528
60
2.62
16.994
64
2.81
18.161
68
17
1.00
8.500
34
1.06
9.249
36
1.12
8.995
36
1.18
9.739
38
1.24
9.479
38
1.29
10.220
40
1.35
10.959
42
1.41
10.692
42
1.47
11.429
44
1.76
13.087
50
1.88
13.539
52
2.06
14.721
56
2.12
14.433
56
2.35
16.339
62
2.47
16.777
64
2.65
17.945
68
18
19
20
21
22
23
24
25
RATIO
CENTER DISTANCE - IN PITCHES
CHAIN LENGTH - IN PITCHES
To obtain corresponding values in
INCHES, multiply by the appropriate
Chain Pitch.
1.00
9.000
36
1.06
9.749
38
1.11
9.495
38
1.17
10.239
40
1.22
9.980
40
1.28
10.721
42
1.33
11.461
44
1.39
11.195
44
1.67
12.858
50
1.78
13.314
52
1.94
14.497
56
2.00
15.230
58
2.22
16.119
62
2.34
16.557
64
2.50
17.728
68
1.00
9.500
38
1.05
10.249
40
1.11
9.995
40
1.16
10.740
42
1.21
10.481
42
1.26
11.222
44
1.31
11.963
46
1.58
13.638
52
1.68
14.099
54
1.84
15.288
58
1.89
15.006
58
2.10
16.920
64
2.21
17.364
66
2.37
18.536
70
1.00
10.000
40
1.05
10.749
42
1.10
10.496
42
1.15
11.240
44
1.20
10.982
44
1.25
11.723
46
1.50
13.406
52
1.60
13.869
54
1.75
15.061
58
1.80
15.795
60
2.00
16.697
64
2.10
17.142
66
2.25
18.317
70
1.00
10.500
42
1.05
11.249
44
1.10
10.996
44
1.14
11.741
46
1.19
11.483
46
1.43
13.172
52
1.52
14.646
56
1.67
14.833
58
1.71
15.567
60
1.90
16.473
64
2.00
17.939
68
2.14
18.096
70
1.00
11.000
44
1.05
11.749
46
1.09
11.496
46
1.14
12.241
48
1.36
13.942
54
1.45
14.413
56
1.59
15.613
60
1.64
15.338
60
1.82
17.262
66
1.91
17.714
68
2.04
18.895
72
1.00
11.500
46
1.04
12.249
48
1.09
11.996
48
1.30
13.705
54
1.39
14.178
56
1.52
15.382
60
1.56
16.117
62
1.74
17.035
66
1.83
17.489
68
1.96
18.671
72
H
1.00
12.000
48
1.04
12.750
50
1.25
14.469
56
1.33
14.946
58
1.46
16.155
62
1.50
15.886
62
1.67
17.818
68
1.75
18.275
70
1.88
19.463
74
1.00
12.500
50
1.20
14.228
56
1.28
14.708
58
1.40
15.921
62
1.44
16.658
64
1.60
17.588
68
1.68
18.047
70
1.80
19.237
74
For Center Distances other than listed in this Table, the Chain Length must be calculated, see Page 265.
P-1930-BG
04/10
Boston Gear 800-825-6544
263
Roller Chain Drives
Selection
SPEED RATIOS - CENTER DISTANCES - CHAIN LENGTHS
Teeth
Driven
Sprocket
48
54
60
70
72
80
84
Teeth on Driver Sprocket
11
12
13
14
4.36
4.00
3.69
3.43
18.294 18.085 18.925 18.713
68
68
70
70
4.91
4.50
4.15
3.86
19.539 20.396 20.186 19.977
74
76
76
76
5.45
5.00
4.61
4.29
21.843 21.637 22.496 22.287
82
82
84
84
5.83
5.39
5.00
25.834 25.628 25.422
96
96
96
6.00
5.54
5.14
26.244 26.038 25.834
98
98
98
5.71
28.545
108
6.00
30.439
114
96
H
112
264
Boston Gear 800-825-6544
15
16
17
18
19
20
21
22
23
24
25
3.20
18.500
70
3.60
20.819
78
4.00
22.079
84
4.67
26.279
98
4.80
26.694
100
5.33
29.413
110
5.60
30.234
114
3.00
18.287
70
3.38
20.607
78
3.75
22.923
86
4.37
26.071
98
4.50
26.487
100
5.00
29.206
110
5.25
31.098
116
6.00
34.633
130
2.92
19.110
72
3.18
20.395
78
3.53
22.712
86
4.12
25.863
98
4.24
27.337
102
4.70
29.000
110
4.94
30.891
116
5.64
34.429
130
2.67
18.894
72
3.00
21.223
80
3.33
22.501
86
3.89
26.708
100
4.00
27.128
102
4.44
29.855
112
4.66
30.685
116
5.33
35.295
132
2.52
18.677
72
2.84
21.008
80
3.16
23.332
88
3.68
26.498
100
3.79
27.918
102
4.21
29.647
112
4.41
31.539
118
5.05
35.088
132
5.90
40.516
152
2.40
19.489
74
2.70
21.827
82
3.00
23.119
88
3.50
26.287
100
3.60
27.758
104
4.00
31.330
118
4.20
31.330
118
4.80
34.882
132
5.60
40.312
152
2.28
19.270
74
2.57
21.609
82
2.86
23.492
90
3.33
27.121
102
3.43
27.547
104
3.81
30.283
114
4.00
31.122
118
4.57
35.738
134
5.33
41.177
154
2.18
20.073
76
2.46
21.392
82
2.73
23.726
90
3.18
26.910
102
3.27
27.334
104
3.64
30.073
114
3.82
31.965
120
4.36
35.531
134
5.03
40.971
154
2.08
18.829
74
2.34
22.200
84
2.61
23.510
90
3.04
26.695
102
3.13
28.164
106
3.48
30.910
116
3.65
31.755
120
4.17
35.322
134
4.87
40.765
154
2.00
19.628
76
2.25
21.980
84
2.50
24.323
92
2.92
27.522
104
3.00
27.951
106
3.33
30.699
118
3.50
31.544
120
4.00
36.170
136
4.67
41.622
156
1.92
20.422
78
2.16
21.760
84
2.40
24.104
92
2.80
27.306
104
2.88
27.736
106
3.20
30.486
116
3.36
32.380
122
3.84
35.960
136
4.48
41.414
156
P-1930-BG
04/10
Roller Chain Drives
Selection
Pitch Conversion Chart
TO DETERMINE CHAIN LENGTH IN PITCHES
(Approximately):
Chain Length in Pitches =
(
)(
)
2 x CD (inches) + Teeth in Driver & Driven + Constant
Pitch
2
Add for Ratio
Constant
{
up to 4 : 1=12
4 to 6: 1=4
6 to 8: 1=6
}
This chart gives chain length in feet when number of pitches and chain pitch (in inches) is known
No.
of
Pitches
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
22
24
28
30
34
38
40
44
48
50
54
58
60
65
70
75
80
85
90
95
100
P-1930-BG
Chain Pitch — Inches
1/4
3/8
1/2
Chain Length — Feet
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0.22
0.25
0.27
0.29
0.31
0.33
0.35
0.37
0.39
0.41
0.45
0.50
0.58
0.62
0.70
0.79
0.83
0.91
1.00
1.04
1.12
1.20
1.25
1.35
1.45
1.56
1.66
1.77
1.87
1.97
2.08
04/10
0.03
0.06
0.09
0.12
0.15
0.18
0.21
0.25
0.28
0.31
0.34
0.37
0.40
0.43
0.46
0.50
0.53
0.56
0.59
0.62
0.68
0.75
0.87
0.93
1.06
1.18
1.25
1.37
1.50
1.56
1.68
1.81
1.87
2.03
2.18
2.34
2.50
2.65
2.81
2.96
3.12
0.04
0.08
0.12
0.16
0.20
0.25
0.29
0.33
0.37
0.41
0.45
0.50
0.54
0.58
0.62
0.66
0.70
0.75
0.79
0.83
0.91
1.00
1.16
1.25
1.41
1.58
1.66
1.83
2.00
2.08
2.25
2.41
2.50
2.70
2.91
3.12
3.33
3.54
3.75
3.95
4.16
5/8
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
0.05
0.10
0.15
0.20
0.26
0.31
0.36
0.41
0.46
0.52
0.57
0.62
0.67
0.72
0.78
0.83
0.88
0.93
0.98
1.04
1.14
1.25
1.45
1.56
1.77
1.97
2.08
2.29
2.50
2.60
2.81
3.02
3.12
3.38
3.64
3.90
4.16
4.42
4.68
4.94
5.20
0.06
0.12
0.18
0.25
0.31
0.37
0.43
0.50
0.56
0.62
0.68
0.75
0.81
0.87
0.93
1.00
1.06
1.12
1.18
1.25
1.37
1.50
1.75
1.87
2.12
2.37
2.50
2.75
3.00
3.12
3.37
3.62
3.75
4.06
4.37
4.68
5.00
5.31
5.62
5.93
6.25
0.08
0.16
0.25
0.33
0.41
0.50
0.58
0.66
0.75
0.83
0.91
1.00
1.08
1.16
1.25
1.33
1.41
1.50
1.58
1.66
1.83
2.00
2.33
2.50
2.83
3.16
3.33
3.66
4.00
4.16
4.50
4.83
5.00
5.41
5.83
6.25
6.66
7.08
7.50
7.91
8.33
0.10
0.20
0.31
0.41
0.52
0.62
0.72
0.83
0.93
1.04
1.14
1.25
1.35
1.45
1.56
1.66
1.77
1.87
1.97
2.08
2.29
2.50
2.91
3.12
3.54
3.95
4.16
4.58
5.00
5.20
5.62
6.04
6.25
6.77
7.29
7.81
8.33
8.85
9.37
9.89
10.41
0.12
0.25
0.37
0.50
0.62
0.75
0.87
1.00
1.12
1.25
1.37
1.50
1.62
1.75
1.87
2.00
2.12
2.25
2.37
2.50
2.75
3.00
3.50
3.75
4.25
4.75
5.00
5.50
6.00
6.25
6.75
7.25
7.50
8.12
8.75
9.37
10.00
10.62
11.25
11.87
12.50
0.14
0.29
0.43
0.58
0.72
0.87
1.02
1.16
1.31
1.45
1.60
1.75
1.89
2.04
2.18
2.33
2.47
2.62
2.77
2.91
3.20
3.50
4.08
4.37
4.95
5.54
5.83
6.41
7.00
7.29
7.87
8.45
8.75
9.47
10.20
10.93
11.66
12.39
13.12
13.85
14.58
0.16
0.33
0.50
0.66
0.83
1.00
1.16
1.33
1.50
1.66
1.83
2.00
2.16
2.33
2.50
2.66
2.83
3.00
3.16
3.33
3.66
4.00
4.56
5.00
5.66
6.33
6.66
7.33
8.00
8.33
9.00
9.66
10.00
10.83
11.66
12.50
13.33
14.16
15.00
15.83
16.66
0.18
0.37
0.56
0.75
0.93
1.12
1.31
1.50
1.68
1.87
2.06
2.25
2.43
2.62
2.81
3.00
3.18
3.37
3.56
3.75
4.12
4.50
5.25
5.62
6.37
7.12
7.50
8.25
9.00
9.37
10.12
10.87
11.25
12.18
13.12
14.06
15.00
15.93
16.87
17.81
18.75
0.20
0.41
0.62
0.83
1.04
1.25
1.45
1.66
1.87
2.08
2.29
2.50
2.70
2.91
3.12
3.33
3.54
3.75
3.95
4.16
4.58
5.00
5.83
6.25
7.08
7.91
8.33
9.16
10.00
10.41
11.25
12.08
12.50
13.54
14.58
15.62
16.66
17.70
18.75
19.79
20.83
Boston Gear 800-825-6544
265
H
Miniature Chain Sprockets
Single Strand
.1475 Pitch; Plastic and Stainless Steel
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Hub
Dia.
Bore
O.D.
Length
thru
Bore
Catalog
Number
Item
Code
15BP7
15BP8
15BP9
15BP10
15BP12
15BP13
15BP14
15BP15
15BP16
15BP17
15BP18
15BP19
15BP20
15BP21
15BP22
15BP23
15BP24
15BP25
15BP26
15BP27
15BP28
15BP29
15BP30
15BP31
15BP32
15BP33
15BP34
15BP35
15BP36
15BP38
15BP40
15BP42
15BP44
15BP52
54144
54145
54146
54147
54148
54149
54150
54151
54152
54153
54154
54155
54156
54157
54158
54159
54160
54161
54162
54163
54164
54165
54166
54167
54168
54169
54170
54171
54172
54173
54174
54175
54176
54177
TYPE B SINGLE HUB PLASTIC (NYLATRON GS)
PLASTIC
.062
P.D.
BORE
O.D.
H
L
H
STAINLESS STEEL
7-28 TEETH
.062
SETSCREW
P.D.
BORE
O.D.
H
L
30-48 TEETH
.062
.031
SETSCREW
P.D.
BORE
O.D.
H
.109
L
7
8
9
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
38
40
42
44
52
.340
.385
.431
.477
.570
.616
.663
.709
.756
.803
.849
.890
.943
.990
1.036
1.083
1.130
1.177
1.224
1.270
1.317
1.364
1.411
1.458
1.505
1.552
1.598
1.645
1.692
1.786
1.880
1.974
2.068
2.443
.093
3/16
7/32
.1250
1/4
3/8
.1875
1/2
.250
5/8
.392
.437
.483
.529
.622
.668
.715
.761
.808
.855
.901
.948
.995
1.042
1.088
1.135
1.182
1.228
1.276
1.322
1.369
1.416
1.463
1.510
1.557
1.604
1.650
1.697
1.744
1.838
1.922
2.026
2.120
2.495
3/8
TYPE B SINGLE HUB STAINLESS STEEL (TYPE 303 – CLEAR PASSIVATED)
7
8
9
10
12
15
16
18
20
24
28
30
34
36
40
48
.340
.385
.431
.477
.570
.709
.756
.849
.943
1.130
1.317
1.411
1.598
1.692
1.880
2.255
.0937
.1250
.1875
15/64*
9/32*
21/64*
3/8*
25/64
17/32
9/16
21/32
3/4
.2500
.392
.437
.483
.529
.622
.761
.808
.901
.995
1.182
1.369
1.463
1.650
1.744
1.932
2.307
11/32
13/32
15BSS7
15BSS8
15BSS9
15BSS10
15BSS12
15BSS15
15BSS16
15BSS18
15BSS20
15BSS24
15BSS28
15BSS30
15BSS34
15BSS36
15BSS40
15BSS48
54178
54179
54180
54181
54182
54183
54184
54185
54186
54187
54188
54189
54190
54191
54192
54193
STANDARD TOLERANCES*
Dimension
Tolerance
Bore
All
±.001 to –.000
*Stainless Steel Only.
266
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 25 1/4" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Catalog
Number
Item
Code
25A32
25A36
25A40
25A45
25A48
25A54
25A60
25A72
68195
46224
46225
68198
46226
46227
46228
46229
TYPE A NO HUB STEEL
32
36
40
45
48
54
60
72
No.
of
Teeth
2.551
2.868
3.186
3.584
3.822
4.300
4.777
5.731
Pitch
Dia.
3/8
1/2
ORDER BY CATALOG NUMBER OR ITEM CODE
With Setscrew*
Without Setscrew
Length
Hub
Bore
thru
Catalog
Item
Catalog
Item
Dia.
Bore Number
Code Number Code
TYPE A
TYPE B SINGLE HUB STEEL
9
10
11
.731
.809
.887
12
.966
13
1.045
14
1.123
15
1.202
16
1.281
17
1.361
18
1.440
19
1.519
20
1.598
21
1.677
22
1.757
23
1.836
24
1.915
P-1930-BG
04/10
1/4
1/4
1/4
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/4
5/16
3/8
1/2
1/4
3/8
1/2
1/4
3/8
1/2
5/8
1/4
3/8
1/2
5/8
3/8
1/2
5/8
3/8
1/2
5/8
3/8
1/2
5/8
3/8
1/2
5/8
29/64
17/32
9/16
1/2
1/2
1/2
11/16
1/2
11/16
1/2
3/4
1/2
3/4
1/2
13/16
1/2
29/32
1/2
1
1/2
1-1/16
1/2
1-5/32
1/2
1-3/8
5/8
1-7/16
5/8
1-1/2
5/8
1-1/2
5/8
25B9 – 1/4
25B10 – 1/4
25B11 – 1/4
25B12 – 1/4
25B12 – 5/16
25B12 – 3/8
25B13 – 1/4
25B13 – 5/16
25B13 – 3/8
25B14 – 1/4
25B14 – 5/16
25B14 – 3/8
25B15 – 1/4
25B15 – 5/16
25B15 – 3/8
25B16 – 1/4
25B16 – 5/16
25B16 – 3/8
25B17 – 1/4
25B17 – 5/16
25B17 – 3/8
25B17 – 1/2
25B18 – 1/4
25B18 – 3/8
25B18 – 1/2
25B19 – 1/4
25B19 – 3/8
25B19 – 1/2
25B19 – 5/8
25B20 – 1/4
25B20 – 3/8
25B20 – 1/2
25B20 – 5/8
25B21 – 3/8
25B21 – 1/2
25B21 – 5/8
25B22 – 3/8
25B22 – 1/2
25B22 – 5/8
25B23 – 3/8
25B23 – 1/2
25B23 – 5/8
25B24 – 3/8
25B24 – 1/2
25B24 – 5/8
68466
58230
68468
19200
58231
58232
19202
68470
68471
19204
68473
68474
19206
58233
58234
19208
58235
58236
19210
58237
58238
58239
19212
58240
58241
19214
58242
58243
58244
19216
58245
58246
58247
45670
45671
45672
45673
45674
45675
45676
45677
45678
45679
45680
45681
25B9
25B10
25B11
25B12A
25B12
—
25B13A
25B13
—
25B14A
25B14
—
25B15A
25B15
—
25B16A
25B16
—
25B17A
25B17
—
—
25B18A
25B18
—
25B19A
25B19
—
—
25B20A
25B20
—
—
25B21
—
—
25B22
—
—
25B23
—
—
25B24
—
—
68465
15600
68467
19199
15602
—
19201
15603
—
19203
68472
—
19205
15604
—
19207
15606
—
19209
15608
—
—
19211
15610
—
19213
15612
—
—
19215
15614
—
—
68187
—
—
68188
—
—
68189
—
—
68190
—
—
TYPE B
.110
MAX.
.110
MAX.
P.D.
P.D.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.234"
STANDARD TOLERANCES
Dimension
Type A
Type B
Bore
Bore
Tolerance
All
All
+.002 - .001
±.001
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have 10-32 setscrews.
Boston Gear 800-825-6544
267
Roller Chain Sprockets
Single Strand
No. 25 1/4" Pitch; Steel and Stainless Steel
No.
of
Teeth
Pitch
Dia.
ORDER BY CATALOG NUMBER OR ITEM CODE
With Setscrew*
Without Setscrew
Length
Hub
thru
Bore
Catalog
Item
Catalog
Item
Dia.
Bore Number
Code
Number Code
TYPE B SINGLE HUB STEEL
.110
MAX.
P.D.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.234”
25
1.995
26
2.074
28
2.233
30
2.392
32
2.551
36
2.868
40
3.186
45
3.584
48
3.822
54
4.300
60
4.777
72
5.731
STANDARD TOLERANCES
Dimension
Bore
All
Tolerance
±.001
3/8
1/2
5/8
3/8
1/2
5/8
3/8
1/2
5/8
3/8
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1-1/2
5/8
1-1/2
5/8
1-1/2
5/8
1-9/32
1/2
1-1/2
5/8
1-1/2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
25B25 – 3/8
25B25 – 1/2
25B25 – 5/8
25B26 – 3/8
25B26 – 1/2
25B26 – 5/8
25B28 – 3/8
25B28 – 1/2
25B28 – 5/8
25B30 – 3/8
25B30 – 1/2
25B30 – 5/8
25B30 – 3/4
25B32 – 1/2
25B32 – 5/8
25B32 – 3/4
25B36 – 1/2
25B36 – 5/8
25B36 – 3/4
25B40 – 1/2
25B40 – 5/8
25B40 – 3/4
25B45 – 1/2
25B45 – 5/8
25B45 – 3/4
25B48 – 1/2
25B48 – 5/8
25B48 – 3/4
25B54 – 1/2
25B54 – 5/8
25B54 – 3/4
25B60 – 1/2
25B60 – 5/8
25B60 – 3/4
25B72 – 3/4
25B72 – 5/8
25B72 – 3/4
45682 25B25
45683
45684
45685 25B26
45686
45687
45692 25B28
45693
45694
58248 25B30
58249
58250
58251
67922 25B32
45695
45696
58252 25B36
45709
45710
58253 25B40
45723
45724
67925 25B45
45725
45726
58254 25B48
45727
45728
58255 25B54
45729
45730
58256 25B60
45731
45732
58257 25B72
45739
45740
68191
68192
68193
15616
68204
15618
15620
68207
15622
15624
15626
15628
TYPE B SINGLE HUB STAINLESS STEEL
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*Sprockets 28 and 30 teeth have 10-32
setscrews. 32-72 teeth 1/4-20 setscrews.
268
Boston Gear 800-825-6544
9
10
11
12
13
14
15
16
17
18
19
20
25
30
36
40
45
60
.731
.809
.887
.966
1.045
1.123
1.202
1.281
1.361
1.440
1.519
1.598
1.995
2.392
2.868
3.186
3.584
4.777
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
3/8
3/8
3/8
1/2
1/2
1/2
7/16
1/2
9/16
5/8
23/32
13/16
57/64
31/32
1-1/32
1-1/8
1-7/32
1-9/32
1-1/2
1-1/2
1-1/2
2
2
2
1/2
5/8
3/4
25B9SS
25B10SS
25B11SS
25B12SS
25B13SS
25B14SS
25B15SS
25B16SS
25B17SS
25B18SS
25B19SS
25B20SS
25B25SS
25B30SS
25B36SS
25B40SS
25B45SS
25B60SS
P-1930-BG
69448
69449
69450
69451
69452
69453
69456
69467
69468
69469
69470
69471
69472
69473
69474
69475
69476
69477
04/10
Roller Chain Sprockets
Single Strand
No. 35 3/8" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Catalog
Number
Item
Code
35A26
35A28
35A30
35A32
35A36
35A40
35A45
35A48
35A72
67761
67763
67764
46230
46232
46233
46235
46236
67775
TYPE A NO HUB STEEL
26
28
30
32
36
40
45
48
72
3.111
3.349
3.588
3.826
4.303
4.780
5.376
5.734
8.597
1/2
5/8
19/32
23/32
ORDER BY CATALOG NUMBER OR ITEM CODE
With Keyway
Without Keyway
No.
Pitch
Hub Length
and Setscrew*
and Setscrew
Bore
of
thru
Dia.
Dia.
Catalog
Item
Catalog
Item
Teeth
Bore
Number
Code Number Code
TYPE B SINGLE HUB STEEL
8
9
.980
1.096
10
1.214
11
1.331
12
1.449
13
1.567
14
1.685
15
1.804
16
17
1.922
2.041
18
2.160
19
2.278
20
2.397
21
2.516
P-1930-BG
04/10
3/8
3/8
3/8
1/2
5/8
3/8
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
7/8
1
1/2
5/8
3/4
7/8
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
3/4†
27/32†
3/4
3/4
31/32†
3/4
1-1/6†
3/4
1-7/32† 3/4
1-1/4†
3/4
1-1/4
3/4
1-11/32 3/4
1-15/32 3/4
1-19/32 3/4
1-23/32 3/4
1-27/32 3/4
1-15/16 3/4
2
7/8
35B8 – 3/8*
35B9 – 3/8
35B10 – 3/8
35B10 – 1/2*
35B10 – 5/8*
35B11 – 3/8
35B11 – 1/2
35B11 – 5/8*
35B11 – 3/4*
35B12 – 1/2
35B12 – 5/8*
35B12 – 3/4*
35B13 – 1/2
35B13 – 5/8*
35B13 – 3/4*
35B14 – 1/2
35B14 – 5/8*
35B14 – 3/4*
35B15 – 1/2
35B15 – 5/8
35B15 – 3/4*
35B16 – 1/2
35B16 – 5/8
35B16 – 3/4
35B17 – 1/2
35B17 – 5/8
35B17 – 3/4
35B17 – 7/8
35B17 – 1*
35B18 – 1/2
35B18 – 5/8
35B18 – 3/4
35B18 – 7/8
35B18 – 1
35B19 – 1/2
35B19 – 5/8
35B19 – 3/4
35B19 – 1
35B20 – 1/2
35B20 – 5/8
35B20 – 3/4
35B20 – 1
35B21 – 1/2
35B21 – 5/8
35B21 – 3/4
35B21 – 1
49474
45750
45751
14886
45752
45753
14890
45754
45755
14892
14894
14896
14898
14900
14902
14904
14906
14908
14910
14912
14914
14916
14918
14920
14922
14924
14926
45756
14928
14930
14932
14934
46674
14936
45757
14938
14940
14942
45758
14944
14946
14948
45759
14950
14952
14954
35B8
35B9
35B10
TYPE A
15630†
14882
14884
35B11
14888
35B12
15632
35B13
15634
35B14
15636
35B15
15638
35B16
15640
TYPE B
.168
MAX.
.168
MAX.
P.D.
P.D.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.359”
STANDARD TOLERANCES
35B17
15642
35B18
15644
35B19
15646
Dimension
Type A
Type B
Bore
Bore
Tolerance
All
All
+.002 - .001
±.001
Reference Pages
35B20
15648
35B21
15650
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 1/4-20 setscrews located
over keyway, except at 90° where marked.
✝Has recessed grove in hub for chain clearance.
Boston Gear 800-825-6544
269
Roller Chain Sprockets
Single Strand
No. 35 3/8" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Hub
Dia.
Bore
With Keyway
Length
and Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
and Setscrew
Catalog Item
Number Code
TYPE B SINGLE HUB STEEL
22
23
24
.168
MAX.
25
26
2.635
2.754
2.873
2.992
3.111
P.D.
28
3.349
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.359”
STANDARD TOLERANCES
Dimension
Bore
All
30
3.588
32
3.826
36
4.303
40
4.780
45
5.376
48
54
60
5.734
6.449
7.165
72
84
96
112
8.597
10.029
11.461
13.371
Tolerance
±.001
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 1/4-20 setscrew located
over keyway, except at 90° where marked.
270
Boston Gear 800-825-6544
1/2
5/8
3/4
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
1/2
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
5/8
3/4
1
3/4
3/4
3/4
3/4
2
7/8
2
7/8
2
2
2
2
2
7/8
7/8
7/8
78
7/8
2
7/8
2-1/4
7/8
2-1/4
1
2-1/4
1
2-1/4
2-1/4
2-1/4
1
1
1
2-1/4
2-1/4
2-1/4
2-1/4
1
1
1
1
35B22 – 1/2
35B22 – 5/8
35B22 – 3/4
35B22 – 1
35B23 – 1/2
35B23 – 5/8
35B23 – 3/4
35B23 – 1
35B24 – 1/2
35B24 – 5/8
35B24 – 3/4
35B24 – 1
35B25 – 1/2
35B25 – 5/8
35B25 – 3/4
35B25 – 1
35B26 – 1/2
35B26 – 5/8
35B26 – 3/4
35B26 – 1
35B28 – 1/2
35B28 – 5/8
35B28 – 3/4
35B28 – 1*
35B30 – 1/2
35B30 – 5/8
35B30 – 3/4
35B30 – 1*
35B32 – 1/2
35B32 – 5/8
35B32 – 3/4
35B32 – 1*
35B36 – 5/8
35B36 – 3/4
35B36 – 1*
35B40 – 5/8
35B40 – 3/4
35B40 – 1
35B45 – 5/8
35B45 – 3/4
35B45 – 1
–
–
35B60 – 3/4
35B60 – 1
–
–
–
–
45760
14956
14958
14960
45761
14962
14964
14966
45762
14968
14970
14972
45763
14974
14976
14978
45764
68257
68258
68259
45766
68263
68264
68265
45767
68266
68267
68268
45768
68269
68270
68271
68275
68276
68277
68278
68279
68280
45772
45773
45774
–
–
45782
45783
–
–
–
–
35B22
15652
35B23
15654
35B24
15656
35B25
15658
35B26
67808
35B28
67810
35B30
15660
35B32
15662
35B36
15664
35B40
15666
35B45A
46241
35B48
35B54
35B60
15668
15670
15672
35B72
35B84
35B96
35B112
15674
15676
15678
15680
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 35 3/8" Pitch; Stainless Steel
No.
of
Teeth
ORDER BY CATALOG NUMBER OR ITEM CODE
Without Keyway
Length
or Setscrew
Pitch
Bore
Hub
thru
Catalog
Item
Dia.
Dia.
Bore
Number
Code
TYPE A NO HUB STEEL
9
10
11
12
13
14
15
16
17
18
19
20
25
30
35
40
45
60
1.096
1.214
1.331
1.449
1.567
1.685
1.804
1.922
2.041
2.160
2.278
2.397
2.992
3.588
4.183
4.780
5.376
7.165
3/8
1/2
27/32†
31/32†
1-1/16†
1-7/32†
1-1/4†
1-1/4
1-11/32
1-15//32
1-19/32
1-23/32
1-27/32
1-15/16
3/4
3/4
1/2
2
7/8
5/8
2-1/4
1
3/4
2-1/4
1
35B9SS
35B10SS
35B11SS
35B12SS
35B13SS
35B14SS
35B15SS
35B16SS
35B17SS
35B18SS
35B19SS
35B20SS
35B25SS
35B30SS
35B35SS
35B40SS
35B45SS
35B60SS
69478
69479
69480
69481
69482
69483
69484
69485
69486
69487
69488
69489
69490
69511
69512
69513
69624
69682
.168
MAX.
P.D.
†Has recessed groove in hub for chain reference.
Double Strand
No. 35 3/8" Pitch; Stainless Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
Without Keyway
No.
Length
Pitch
Hub
or Setscrew
of
Bore
thru
Dia.
Dia.
Catalog
Item
Teeth
Bore
Number
Code
TYPE B SINGLE HUB STEEL
16
17
18
19
20
21
22
23
24
25
30
1.922
2.041
2.160
2.278
2.397
2.516
2.635
2.754
2.873
2.992
3.588
1/2
3/4
3/4
1-15/32
1-19/32
1-23/32
1-7/8
1-15/16
2-1/16
2-3/16
2-1/4
2-1/4
2-1/4
2-1/2
1-1/4
1-3/8
1-3/8
D35B16
D35B17
D35B18
D35B19
D35B20
D35B21
D35B22
D35B23
D35B24
D35B25
D35B30
15930
15932
15934
15936
15938
15940
15942
15944
15946
15948
69995
.561
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.359”
STANDARD TOLERANCES
Dimension
Tolerance
Stainless Steel
Bore
All
Double Strand
Bore
All
P-1930-BG
04/10
+.002 —.000
±.001
.300
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
P.D.
.162
MAX
Boston Gear 800-825-6544
271
H
Roller Chain Sprockets
Single Strand
No. 41 1/2" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Catalog
Number
Item
Code
41A21
41A22
41A23
41A24
41A25
41A26
41A27
41A28
41A30
41A32
41A36
41A40
41A45
41A48
41A54
41A60
41A72
41A96
56742
56743
56744
56745
56746
67876
67877
67878
16094
16096
16098
16100
16102
16104
16106
16108
16112
16116
TYPE A—NO HUB STEEL
TYPE A
TYPE B
.227
MAX.
.227
MAX.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.391”
STANDARD TOLERANCES
Dimension
Type A
Type B
Bore
Bore
6
7
8
9
1.000
1.15
1.307
1.462
10
1.618
11
1.775
Tolerance
All
All
+.002 - .001
±.001
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 1/4-20 setscrews located
over keyway except at 90° where marked.
✝Has recessed groove in hub for chain
clearance.
272
3.355
3.513
3.672
3.831
3.989
4.148
4.307
4.466
4.783
5.101
5.737
6.373
7.168
7.645
8.599
9.554
11.463
15.282
5/8
19/32
23/32
15/16
ORDER BY CATALOG NUMBER OR ITEM CODE
With Keyway
Without Keyway
No.
Pitch
Hub Length
and Setscrew*
and Setscrew
Bore
of
thru
Dia.
Dia.
Catalog
Item
Catalog
Item
Teeth
Bore
Number
Code Number Code
TYPE B SINGLE HUB STEEL
P.D.
P.D.
21
22
23
24
25
26
27
28
30
32
36
40
45
48
54
60
72
96
Boston Gear 800-825-6544
12
13
14
15
1.932
2.089
2.247
2.405
3/8
3/8
1/2
1/2
5/8
1/2
5/8
3/4
1/2
5/8
3/4
1/2
5/8
3/4
7/8
1/2
5/8
3/4
7/8
1
1/2
5/8
3/4
7/8
1
1/2
5/8
3/4
1
21/32†
3/4†
63/64†
1-1/8†
7/8
7/8
7/8
7/8
1-1/4†
7/8
1-7/16†
7/8
1-9/16†
1-9/16†
1-3/4
1-29/32
7/8
7/8
7/8
7/8
—
—
—
41B9-1/2
41B9-5/8*
41B10-1/2
41B10-5/8*
41B10-3/4*
41B11-1/2
41B11-5/8
41B11-3/4*
41B12-1/2
41B12-5/8
41B12-3/4
41B12-7/8
41B13-1/2
41B13-5/8
41B13-3/4
41B13-7/8
41B13-1*
41B14-1/2
41B14-5/8
41B14-3/4
41B14-7/8
41B14-1*
41B15-1/2
41B15-5/8
41B15-3/4
41B15-1
—
—
—
15506
15508
15510
15512
15514
15516
15518
15520
15522
15524
15526
35950
15528
15530
15532
35952
15534
15536
15538
15540
35954
15542
15544
15546
15548
15550
41B6
41B7
41B8
41B9
15758
15760
15762
15764
41B10
15766
41B11
15768
41B12
15770
41B13
15772
41B14
15774
41B15
15776
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 41 1/2" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
With Keyway
Without Keyway
No.
Pitch
Hub Length
and Setscrew*
and Setscrew
Bore
of
thru
Dia.
Dia.
Item
Catalog Item
Teeth
Bore Catalog
Number
Code Number Code
TYPE B SINGLE HUB STEEL
16
2.563
17
2.721
18
2.879
19
3.038
20
3.196
21
3.355
22
3.513
23
3.672
24
3.831
25
3.989
26
4.148
27
4.307
28
4.466
30
4.783
32
36
40
45
48
54
60
72
96
5.101
5.737
6.373
7.168
7.645
8.599
9.554
11.463
15.282
P-1930-BG
04/10
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
3/4
1
5/8
5/8
3/4
3/4
3/4
3/4
3/4
3/4
1
2-1/16
7/8
2-15/64
1
2-3/8
1
2-15/32
1
2-3/4
1
2-7/8
1
3
1
3-3/16
1
3-1/4
1
3-1/4
1
3-1/4
1
3-1/4
1
3-1/4
1
3-1/4
1
3-1/4
3-1/4
3-1/4
3-1/2
3-1/2
3-1/2
3-1/2
4
4
1
1
1-1/16
1-1/16
1-1/16
1-1/16
1-1/16
1-3/16
1-3/16
41B16-5/8
41B16-3/4
41B16-1
41B17-5/8
41B17-3/4
41B17-1
41B18-5/8
41B18-3/4
41B18-1
41B19-5/8
41B19-3/4
41B19-1
41B20-5/8
41B20-3/4
41B20-1
41B21-5/8
41B21-3/4
41B21-1
41B22-5/8
41B22-3/4
41B22-1
41B23-5/8
41B23-3/4
41B23-1
41B24-5/8
41B24-3/4
41B24-1
41B25-5/8
41B25-3/4
41B25-1
41B26-5/8
41B26-3/4
41B26-1
41B27-5/8
41B27-3/4
41B27-1
41B28-5/8
41B28-3/4
41B28-1
41B30-5/8
41B30-3/4
41B30-1
—
—
—
—
—
—
—
—
—
15552
15554
15556
15558
15560
15562
15564
15566
15568
35956
15570
15572
35958
15574
15576
35960
15578
15580
35962
15582
15584
35964
15586
15588
35966
15590
15592
35968
15594
15596
68281
68282
68283
68284
68285
68286
68287
68288
68289
68290
68291
68292
—
—
—
—
—
—
—
—
—
41B16
15778
41B17
15780
41B18
15782
41B19
15784
41B20
15786
41B21
15788
41B22
15790
41B23
15792
41B24
15794
41B25
15796
41B26
67920
41B27
67930
.227
MAX.
P.D.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.391”
STANDARD TOLERANCES
Dimension
Bore
41B28
67931
41B30
16464
41B32
41B36
41B40
41B45
41B48
41B54
41B60
41B72
41B96
16466
16468
16470
16472
16474
16476
16478
16482
16486
Tolerance
All
±.001
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyways. All
sprockets have 1/4-20 setscrews located
over keyway.
Boston Gear 800-825-6544
273
Roller Chain Sprockets
Single Strand
No. 40 1/2" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Catalog
Number
Item
Code
40A19
40A20
40A21
40A22
40A23
40A24
40A25
40A26
40A27
40A28
40A30
40A32
40A35
40A36
40A38
40A40
40A42
40A45
40A48
40A54
40A60
40A72
40A84
40A96
40A112
68007
68008
56747
56748
56749
56750
56751
67014
67015
67016
16258
16260
68023
16262
68026
16264
16266
16268
16270
16272
16274
16278
16282
16284
16286
TYPE A—NO HUB STEEL
TYPE A
19
20
21
22
23
24
25
26
27
28
30
32
35
36
38
40
42
45
48
54
60
72
84
96
112
TYPE B
.284
MAX.
.284
MAX.
P.D.
P.D.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.469”
STANDARD TOLERANCES
Dimension
Tolerance
Type A
Type B
Bore
Bore
All
All
+.002 - .001
±.001
Reference Pages
Alterations –316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyways.
All sprockets have 1/4-20 setscrews,
located over keyway, except at 90°
where marked.
8
1.307
9
1.462
10
11
12
13
14
15
Boston Gear 800-825-6544
5/8
19/32
23/32
15/16
ORDER BY CATALOG NUMBER OR ITEM CODE
With Keyway
Without Keyway
No.
Pitch
Hub Length
and Setscrew*
and Setscrew
Bore
of
thru
Dia.
Dia.
Item
Catalog Item
Teeth
Bore Catalog
Number
Code Number Code
TYPE B SINGLE HUB STEEL
1.618
1.775
1.932
2.089
2.247
✝Has recessed groove in the hub for
chain clearance.
274
3.038
3.196
3.355
3.513
3.672
3.831
3.989
4.148
4.307
4.466
4.783
5.101
5.578
5.737
6.055
6.373
6.691
7.168
7.645
8.599
9.554
11.463
13.372
15.282
17.828
2.405
1/2
1/2
5/8
1/2
5/8
3/4
1/2
5/8
3/4
7/8
1/2
5/8
3/4
7/8
1
1/2
5/8
3/4
7/8
1
1/2
5/8
3/4
7/8
1
1-1/8
1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
31/32†
7/8
1-1/16†
7/8
1-1/4†
1-3/8†
1-9/16†
1-9/16
1-11/16
1-13/16
7/8
7/8
7/8
7/8
7/8
7/8
—
—
40B9-1/2*
14980
40B9-5/8*
14982
40B10-1/2
14984
40B10-5/8*
14986
40B10-3/4*
14988
40B11-1/2
36054
40B11-5/8
14990
40B11-3/4
14992
40B11-7/8*
14994
40B12-1/2
36056
40B12-5/8
14996
40B12-3/4
14998
40B12-7/8
15000
40B12-1*
15002
40B13-1/2
36058
40B13-5/8
15004
40B13-3/4
15006
40B13-7/8
15008
40B13-1*
15010
40B14-1/2
36060
40B14-5/8
15012
40B14-3/4
15014
40B14-7/8
15016
40B14-1
15018
40B14-1-1/8* 56732
40B15-1/2
36062
40B15-5/8
15020
40B15-3/4
15022
40B15-7/8
15024
40B15-1
15026
40B15-1-1/8 15028
40B15-1-3/16* 15030
40B15-1-1/4* 15032
40B8
40B9
15682
15684
40B10
15686
40B11
15688
40B12
15690
40B13
15692
40B14
15694
40B15
15696
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 40 1/2" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
With Keyway
Without Keyway
No.
Pitch
Hub Length
and Setscrew*
and Setscrew
Bore
of
thru
Dia.
Dia.
Item
Catalog Item
Teeth
Bore Catalog
Number
Code Number Code
TYPE B SINGLE HUB STEEL
16
17
18
19
20
21
P-1930-BG
2.563
2.721
2.879
3.038
3.196
3.355
04/10
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
2
2-1/8
2-5/16
2-1/2
2-5/8
2-3/4
7/8
1
1
1
1
1
40B16-5/8
15034
40B16-3/4
15036
40B16-7/8
15038
40B16-1
15040
40B16-1-1/8 36064
40B16-1-3/16 15042
40B16-1-1/4 15044
40B17-5/8
15046
40B17-3/4
15048
40B17-7/8
36066
40B17-1
15050
40B17-1-1/8 15052
40B17-1-3/16 15054
40B17-1-1/4 56733
40B18-5/8
36068
40B18-3/4
15056
40B18-7/8
15058
40B18-1
15060
40B18-1-1/8 15062
40B18-1-3/16 15064
40B18-1-1/4 15066
40B18-1-3/8 36070
40B18-1-7/16 15068
40B18-1-1/2 15070
40B19-5/8
36072
40B19-3/4
15072
40B19-7/8
36074
40B19-1
15074
40B19-1-1/8 36076
40B19-1-3/16 15076
40B19-1-1/4 36078
40B19-1-3/8 36080
40B19-1-7/16*
40B19-1-1/2* 56734
40B20-5/8
36082
40B20-3/4
15080
40B20-7/8
15082
40B20-1
15084
40B20-1-1/8 15086
40B20-1-3/16 15088
40B20-1-1/4 15090
40B20-1-3/8 36084
40B20-1-7/16 15092
40B20-1-1/2 15094
40B21-5/8
36086
40B21-3/4
17148
40B21-7/8
15096
40B21-1
15098
40B21-1-1/8 36088
40B21-1-3/16 15100
40B21-1-1/4 36090
40B21-1-3/8 36092
40B21-1-7/16*
40B21-1-1/2* 15104
40B16
15698
40B17
15700
40B18
15702
.284
MAX.
P.D.
40B19
H
15704
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.469”
STANDARD TOLERANCES
Dimension
Tolerance
15078
Bore
40B20
All
±.001
15706
Reference Pages
40B21
15708
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyways.
Sprockets 16-17 teeth have 1/4-20
setscrews, 18-21 teeth 5/16-18
setscrews, located over keyway, except
at 90° where marked.
15102
Boston Gear 800-825-6544
275
Roller Chain Sprockets
Single Strand
No. 40 1/2" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
With Keyway
Without Keyway
No.
Pitch
Hub Length
and Setscrew*
and Setscrew
Bore
of
thru
Dia.
Dia.
Item
Catalog Item
Teeth
Bore Catalog
Number
Code Number Code
TYPE B SINGLE HUB STEEL
22
.284
MAX.
23
3.513
3.672
P.D.
H
24
3.831
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.469”
STANDARD TOLERANCES
Dimension
Tolerance
Bore
All
±.001
25
3.989
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
26
4.148
*All sprockets have standard keyways.
All sprockets have 5/16-18 setscrews
located over keyway, except at 90°
where marked.
27
276
Boston Gear 800-825-6544
4.307
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
2-7/8
3
3-1/4
3-1/4
3-1/4
3-1/4
1
1
1
1
1
1
40B22-5/8
40B22-3/4
40B22-7/8
40B22-1
40B22-1-1/8
40B22-1-3/16
40B22-1-1/4
40B22-1-3/8
40B22-1-7/16
40B22-1-1/2
40B23-5/8
40B23-3/4
40B23-7/8
40B23-1
40B23-1-1/8
40B23-1-3/16
40B23-1-1/4
40B23-1-3/8
40B23-1-7/16
40B23-1-1/2
40B24-5/8
40B24-3/4
40B24-7/8
40B24-1
40B24-1-1/8
40B24-1-3/16
40B24-1-1/4
40B24-1-3/8
40B24-1-7/16
40B24-1-1/2
40B25-5/8
40B25-3/4
40B25-7/8
40B25-1
40B25-1-1/8
40B25-1-3/16
40B25-1-1/4
40B25-1-7/16
40B25-1-1/2
40B26-5/8
40B26-3/4
40B26-7/8
40B26-1
40B26-1-1/8
40B26-1-3/16
40B26-1-1/4
40B26-1-7/16
40B26-1-1/2
40B27-5/8
40B27-3/4
40B27-7/8
40B27-1
40B27-1-1/8
40B27-1-3/16
40B27-1-1/4
40B27-1-7/16
40B27-1-1/2
36094
15106
36096
15108
15110
15112
15114
36098
15116
56735
36102
15118
36104
15120
36106
15122
15124
36108
15126
56736
36110
15128
36112
15130
15132
15134
15136
36114
15138
15140
36116
15142
36118
15144
36120
36122
15146
36124
15148
36126
68293
68294
68295
68296
68297
68298
68299
68300
36128
68301
68302
68303
68304
68305
68306
68307
68308
40B22
15710
40B23
15712
40B24
15714
40B25
15716
40B26
68089
40B27
68090
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 40 1/2" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
With Keyway
Without Keyway
No.
Pitch
Hub Length
and Setscrew*
and Setscrew
Bore
of
thru
Dia.
Dia.
Catalog
Item
Catalog
Item
Teeth
Bore
Number
Code Number Code
TYPE B SINGLE HUB STEEL
28
4.466
30
4.783
32
5.101
35
5.578
36
5.738
38
40
6.055
6.373
42
45
6.691
7.168
48
7.645
54
8.599
60
9.554
72
84
96
112
11.463
13.372
15.282
17.828
P-1930-BG
04/10
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
5/8
5/8
3/4
1
1-1/4
1-7/16
1-1/2
3/4
1
1-1/4
1-7/16
1-1/2
5/8
3/4
3/4
1
1-1/4
1-7/16
1-1/2
3/4
1
1-1/4
1-7/16
1-1/2
3/4
1
1-1/4
1-7/16
1-1/2
3/4
1
1-1/4
1-7/16
1-1/2
3/4
3/4
1
1
3-1/4
1
3-1/4
1
3-1/4
1
3-1/4
1
3-1/4
1
3-1/4
3-1/2
1
1-1/8
3-1/2
3-1/2
1-1/8
1-1/8
3-1/2
1-1/8
3-1/2
1-1/8
3-1/2
1-1/8
4
4
4
4
1-1/4
1-1/4
1-1/4
1-1/4
40B28-5/8
40B28-3/4
40B28-7/8
40B28-1
40B28-1-1/8
40B28-1-3/16
40B28-1-1/4
40B28-1-7/16
40B28-1-1/2
40B30-5/8
40B30-3/4
40B30-7/8
40B30-1
40B30-1-1/8
40B30-1-3/16
40B30-1-1/4
40B30-1-7/16
40B30-1-1/2
—
40B35-5/8
40B35-3/4
40B35-1
40B35-1-1/4
40B35-1-7/16
40B35-1-1/2
40B36-3/4
40B36-1
40B36-1-1/4
40B36-1-7/16
40B36-1-1/2
—
—
40B42-3/4
40B42-1
40B42-1-1/4
40B42-1-7/16
40B42-1-1/2
40B45-3/4
40B45-1
40B45-1-1/4
40B45-1-7/16
40B45-1-1/2
40B48-3/4
40B48-1
40B48-1-1/4
40B48-1-7/16
40B48-1-1/2
—
40B60-1
40B60-1-1/4
40B60-1-7/16
40B60-1-1/2
—
—
—
—
36130
68309
68310
68311
68312
68313
68314
68315
68316
36134
68325
68326
68327
68328
68329
68330
68331
68332
—
36186
36188
36190
36192
36194
36196
49478
36200
45979
45980
45981
—
—
49479
36264
36266
36268
36270
49480
36298
36300
36302
36304
49481
36330
36332
36334
36336
—
36470
36472
36474
36476
—
—
—
—
40B28
68091
40B30
16434
.284
MAX.
40B32
40B35
16436
68096
P.D.
H
40B36
16438
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.469”
40B38
40B40
40B42
68098
16440
16442
STANDARD TOLERANCES
Dimension
Bore
40B45
All
Tolerance
±.001
16444
Reference Pages
40B48
16446
40B54
40B60
16448
16450
40B72
40B84
40B96
40B112
16454
16458
16460
16462
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyways.
All sprockets have 5/16-18 setscrews
located over keyway.
Boston Gear 800-825-6544
277
Roller Chain Sprockets
Single Strand
No. 40 1/2" Pitch; Stainless Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
Without Keyway
No.
or Setscrew
of
Pitch
Bore
Hub
Length
Catalog
Item
Teeth
Dia.
Dia.
thru
Number
Code
TYPE B SINGLE HUB STAINLESS STEEL
.284
MAX.
P.D.
10
11
12
13
14
15
16
17
18
19
20
25
30
40
45
60
1.618
1.775
1.932
2.089
2.247
2.405
2.563
2.721
2.879
3.038
3.196
3.989
4.783
6.373
7.168
9.554
1-1/4†
1-3/8†
1-9/16†
1-9/16
1-11/16
1-13/16
2
2-1/8
2-5/16
2-1/2
2-5/8
3-1/4
3-1/4
3-1/2
3-1/2
3-1/2
1/2
5/8
5/8
3/4
7/8
7/8
1
1
40B10SS
40B11SS
40B12SS
40B13SS
40B14SS
40B15SS
40B16SS
40B17SS
40B18SS
40B19SS
40B20SS
40B25SS
40B30SS
40B40SS
40B45SS
40B60SS
69275
69276
69277
69278
69279
69280
69281
69282
69283
69294
69295
69296
69297
69300
69301
69302
†Has recessed groove in hub for chain reference.
H
Double Strand
No. 40 2-1/2" Pitch; Steel
.841
.395
P.D.
.275
MAX
ORDER BY CATALOG NUMBER OR ITEM CODE
Without Keyway
No.
or Setscrew
of
Pitch
Bore
Hub
Length
Catalog
Item
Teeth
Dia.
Dia.
thru
Number
Code
TYPE B SINGLE HUB STEEL
13
14
15
16
17
18
19
20
21
22
23
24
25
26
30
35
36
40
2.089
2.247
2.405
2.563
2.721
2.879
3.038
3.196
3.355
3.513
3.672
3.831
4.989
4.148
4.783
5.578
5.737
6.373
5/8
7/8
15/16
STANDARD TOLERANCES
Dimension
Boston Gear 800-825-6544
1/2
1-1/2
1-11/16
1-13/126
2
2-1/8
2-5/16
2-1/2
2-5/8
2-3/4
2-7/8
3
3-1/4
3-1/4
3-1/4
2-1/2
3-1/4
3-3/4
3-3/4
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. +.469”
Stainless Steel
Bore
All
Double Strand
Bore
All
278
1/2
Tolerance
+.002 —.000
1-1/2
1-1/2
1-5/8
1-5/8
1-5/8
1-3/4
D40B13
D40B14
D40B15
D40B16
D40B17
D40B18
D40B19
D40B20
D40B21
D40B22
D40B23
D40B24
D40B25
D40B26
D40B30
D40B35
D40B36
D40B40
46563
46564
46565
15950
15952
15954
15956
15958
15960
15962
15964
15966
15968
68011
68012
68013
68018
68020
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
±,001
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 50 5/8" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Catalog
Number
Bore
Item
Code
TYPE A NO HUB STEEL
17
3.401
50A17
18
3.599
5/8
50A18
19
3.797
50A19
20
3.955
50A20
21
4.193
3/4
50A21
22
4.392
50A22
23
4.590
50A23
24
4.788
50A24
25
4.987
50A25
26
5.185
50A26
28
5.582
50A28
30
5.979
50A30
32
6.376
23/32
50A32
35
6.872
50A35
36
7.171
50A36
40
7.966
50A40
42
8.363
50A42
45
8.960
50A45
48
9.556
50A48
54
10.749
50A54
60
11.942
50A60
72
14.328
15/16
50A72
84
16.715
50A84
96
19.102
50A96
112
21.885
50A112
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Catalog
Item
Bore
Number
Code
45865
56752
56753
56754
56755
56756
56757
56758
16288
45866
45867
16290
16292
45872
16294
16296
16298
16300
16302
16304
16306
16310
16314
16316
16318
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
8
1.633
9
1.827
10
2.023
11
12
13
14
P-1930-BG
2.218
2.415
2.612
2.809
04/10
5/8
5/8
3/4
5/8
3/4
7/8
1
5/8
3/4
7/8
1
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-1/8†
1
1-3/8†
1
1-9/16†
1
1-3/4†
1-63/64†
1-7/8
2-1/8
1
1
1
1
50B8-5/8*
50B9-5/8
50B9-3/4*
50B10-5/8
50B10-3/4
50B10-7/8
50B10-1*
50B11-5/8
50B11-3/4
50B11-7/8
50B11-1*
50B12-5/8
50B12-3/4
50B12-7/8
50B12-1
50B12-1-1/8
50B12-1-3/16
50B12-1-1/4*
50B13-5/8
50B13-3/4
50B13-7/8
50B13-1
50B13-1-1/8*
50B13-1-3/16
50B13-1-1/4*
50B14-5/8
50B14-3/4
50B14-7/8
50B14-1
50B14-1-1/8
50B14-1-3/16
50B14-1-1/4*
49482
15150
15152
15154
15156
36496
36498
15158
15160
15162
15164
15166
15168
15170
15172
15174
36500
36502
36504
15176
15178
15180
15182
15184
15186
36506
15188
15190
15192
15194
15196
15198
50B8
50B9
15798
15800
50B10
15802
50B11
15804
50B12
50B13
TYPE A
TYPE B
.343
MAX.
.343
MAX.
P.D.
P.D.
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .594”
STANDARD TOLERANCES
Dimension
Tolerance
Type A
Bore
All
±.002 –.001
Type B
Bore
All
±.001
Reference Pages
15806
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
15808
*All sprockets have standard keyway.
Sprockets 8-12 teeth have 1/4–20
setscrew, 13-14 teeth 5/16-18 setscrew
located over keyway except at 90° where
marked.
†Has recessed groove in hub for chain
clearance.
50B14
15810
Boston Gear 800-825-6544
279
H
Roller Chain Sprockets
Single Strand
No. 50 5/8" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
15
3.006
.343
MAX.
16
3.204
P.D.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .594”
17
3.401
STANDARD TOLERANCES
Dimension
Bore
Tolerance
All
±.001
Reference Pages
18
3.599
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 5/16–18 setscrews
located over keyway except at 90° where
marked.
19
20
280
Boston Gear 800-825-6544
3.797
3.995
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
1-5/8
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
1-5/8
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
5/8
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
1-5/8
2-3/8
2-1/2
2-11/16
2-7/8
3
3
1
1
1
1
1
1
50B15-5/8
50B15-3/4
50B15-7/8
50B15-1
50B15-1-1/8
50B15-1-3/16
50B15-1-1/4
50B15-1-3/8
50B15-1-7/16*
50B15-1-1/2*
50B16-5/8
50B16-3/4
50B16-7/8
50B16-1
50B16-1-1/8
50B16-1-3/16
50B16-1-1/4
50B16-1-3/8
50B16-1-7/16
50B16-1-1/2*
50B16-1-5/8*
50B17-5/8
50B17-3/4
50B17-7/8
50B17-1
50B17-1-1/8
50B17-1-3/16
50B17-1-1/4
50B17-1-3/8*
50B17-1-7/16*
50B17-1-1/2*
50B17-1-5/8*
50B18-5/8
50B18-3/4
50B18-7/8
50B18-1
50B18-1-1/8
50B18-1-3/16
50B18-1-1/4
50B18-1-1/4
50B18-1-7/16
50B18-1-1/2
50B19-5/8
50B19-3/4
50B19-7/8
50B19-1
50B19-1-1/8
50B19-1-3/16
50B19-1-1/4
50B19-1-1/4
50B19-1-7/16
50B19-1-1/2
50B20-3/4
50B20-7/8
50B20-1
50B20-1-1/8
50B20-1-3/16
50B20-1-1/4
50B20-1-1/4
50B20-1-7/16
50B20-1-1/2
50B20-1-5/8
36508
15200
15202
15204
36206
15208
15210
15212
15214
36510
36512
15216
15218
15220
15222
15224
15226
15228
15230
15232
36514
36516
15234
17150
15236
15238
15240
15242
15244
15246
56737
36518
36520
15248
15250
15252
36522
15254
15256
15258
15260
15262
36524
36526
36528
15264
15266
15268
15270
15272
15274
15276
36530
15278
15280
56738
15282
15284
15286
15288
15290
36532
50B15
15812
50B16
15814
50B17
15816
50B18
15818
50B19
15820
50B20
15833
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 50 5/8" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
21
22
23
24
25
26
28
30
P-1930-BG
4.193
4.392
4.590
4.788
4.987
5.185
5.582
5.979
04/10
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
3/4
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
3/4
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
3/4
1
1-1/8
1-3/16
1-1/4
1-7/16
1-1/2
3
3
3
3
3
3
3
3
1
1
1
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
50B21-3/4
50B21-1
50B21-1-1/8
50B21-1-3/16
50B21-1-1/4
50B21-1-3/8
50B21-1-7/16
50B21-1-1/2
50B22-3/4
50B22-1
50B22-1-1/8
50B22-1-3/16
50B22-1-1/4
50B22-1-3/8
50B22-1-7/16
50B22-1-1/2
50B23-3/4
50B23-1
50B23-1-1/8
50B23-1-3/16
50B23-1-1/4
50B23-1-3/8
50B23-1-7/16
50B23-1-1/2
50B24-3/4
50B24-1
50B24-1-1/8
50B24-1-3/16
50B24-1-1/4
50B24-1-3/8
50B24-1-7/16
50B24-1-1/2
50B25-3/4
50B25-1
50B25-1-1/8
50B25-1-3/16
50B25-1-1/4
50B25-1-3/8
50B25-1-7/16
50B25-1-1/2
50B26-3/4
50B26-1
50B26-1-1/8
50B26-1-3/16
50B26-1-1/4
50B26-1-7/16
50B26-1-1/2
50B28-3/4
50B28-1
50B28-1-1/8
50B28-1-3/16
50B28-1-1/4
50B28-1-7/16
50B28-1-1/2
50B30-3/4
50B30-1
50B30-1-1/8
50B30-1-3/16
50B30-1-1/4
50B30-1-7/16
50B30-1-1/2
36536
15292
36540
36538
15294
36542
56739
15296
36546
15300
36548
36550
15302
36552
36554
15304
36558
15308
36560
36562
15310
36564
36566
15312
36570
15316
36572
36574
15318
36576
36578
15320
36582
36584
36586
36588
36590
36592
36594
36596
36602
36604
36606
36608
36610
36612
36614
36638
36640
36642
36644
36646
36648
36650
36674
36676
36678
36680
36682
36684
36686
50B21
15824
50B22
15826
.343
MAX.
50B23
15828
P.D.
50B24
H
15830
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .594”
STANDARD TOLERANCES
50B25
15832
Dimension
Bore
All
Tolerance
±.001
Reference Pages
50B26
36598
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
50B28
36630
*All sprockets have standard keyway. All
sprockets have 5/16–18 setscrews
located over keyway except at 90° where
marked.
50B30
16488
Boston Gear 800-825-6544
281
Roller Chain Sprockets
Single Strand
No. 50 5/8" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Hub
Dia.
Bore
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
.343
MAX.
32
6.376
35
6.972
36
7.171
40
7.966
42
8.363
45
8.960
48
9.556
54
10.749
60
11.942
72
84
96
112
14.328
16.715
19.102
21.885
P.D.
H
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 5/16–18 setscrews located
over keyway except at 90° where marked.
Double Strand
3/4
—
3/4
1
1-1/4
1-7/16
1-1/2
3/4
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
1
1-1/4
1-7/16
1-1/2
1-15/16
1
1
1-1/4
1-7/16
1-1/2
1-15/16
1
1
1
1
3-1/4
1-1/4
3-1/4
1-1/4
3-1/4
1-1/4
3-1/4
1-1/4
3-1/4
1-1/4
3-3/4
1-1/4
3-3/4
1-1/4
3-3/4
1-1/4
3-3/4
1-1/4
3-3/4
4-1/4
4-1/4
4-1/4
1-3/4
1-3/4
1-3/4
1-3/4
—
—
—
—
50B35-3/4
36748
50B35-1
36750
50B35-1-1/4 36752
50B35-1-7/16 36754
50B35-1-1/2 36756
—
—
50B40-3/4
36808
50B40-1
36810
50B40-1-1/4 36812
50B40-1-7/16 36814
50B40-1-1/2 36816
50B40-1-15/16* 36818
—
—
50B45-3/4
36876
50B45-1
36878
50B45-1-1/4 36880
50B45-1-7/16 36882
50B45-1-1/2 36884
50B45-1-15/16* 36886
50B48-1
36892
50B48-1-1/4 36894
50B48-1-7/16 36896
50B48-1-1/2 36898
50B48-1-15/16* 35942
—
—
50B60-1
35920
50B60-1-1/4 35922
50B60-1-7/16 35924
50B60-1-1/2 35926
50B60-1-15/16* 35928
—
—
—
—
—
—
—
—
50B32
—
50B35
16490
—
36744
50B36
50B40
16490
16494
50B42
50B45
16496
16498
50B48
16500
50B54
50B60
16502
16504
50B72
50B84
50B96
50B112
16508
16512
16514
16516
ORDER BY CATALOG NUMBER OR ITEM CODE
No. 50-2 5/8" Pitch; Steel
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
Length
thru
Bore
With Keyway
& Setscrew*
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
1.045
.500
P.D.
15
16
17
18
20
21
22
24
25
30
40
3.006
3.204
3.401
3.599
3/995
4.193
4.392
4.788
4.987
5.979
7.966
3/4
1
1
1-3/16
STANDARD TOLERANCES
.332
MAX
282
Boston Gear 800-825-6544
Dimension
Bore
Tolerance
All
±.001
2-5/16
2-1/2
2-11/16
2-15/16
3-1/4
3-1/2
3-9/16
3-5/8
3-5/8
3-3/4
4
1-3/4
1-3/4
1-7/8
2-1/8
D50B15
D50B16
D50B17
D50B18
D50B20
D50B21
D50B22
D50B24
D50B25
D50B30
D50B40
15970
15972
15974
15976
15980
15982
15984
15988
15990
68166
68173
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .594”
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 60 3/4" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
TYPE A NO HUB STEEL
17
4.082
18
4.319
19
4.557
20
4.794
21
5.032
22
5.270
23
5.508
24
5.746
25
5.984
26
6.222
28
6.699
30
7.175
32
7.652
35
8.367
36
8.605
40
9.559
45
10.752
48
11.467
54
12.899
60
14.330
72
17.194
3/4
23/32
15/16
1-1/4
Catalog
Number
Item
Code
60A17
60A18
60A19
60A20
60A21
60A22
60A23
60A24
60A25
60A26
60A28
60A30
60A32
60A35
60A36
60A40
60A45
60A48
60A54
60A60
60A72
56759
56760
56761
56762
16320
16322
16324
16326
16328
61894
46466
16330
16332
46471
16334
16336
16340
16342
16344
16346
16350
TYPE A
TYPE B
.459
MAX.
.575
MAX.
P.D.
P.D.
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
8
9
1.960
2.193
10
2.023
11
12
13
14
P-1930-BG
2.662
2.898
3.134
3.370
04/10
5/8
3/4
3/4
7/8
1
1-1/8
1-3/16
1-3/4
3/4
7/8
1
1-1/8
1-3/16
1-3/4
3/4
7/8
1
1-1/8
1-3/16
1-3/4
1-7/16
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-15/32†
1-9/16†
1-9/16†
2-1/16†
2-3/8†
2-11/32
2-9/16
1-1/4 60B8-3/4*
1-1/4 60B9-3/4*
60B10-3/4
60B10-7/8
1-1/4 60B10-1
60B10-1-1/8*
60B10-1-3/16*
60B10-1-1/4*
60B11-3/4
60B11-7/8
1-1/4 60B11-1
60B11-1-1/8*
60B11-1-3/16*
60B11-1-1/4*
60B12-3/4
60B12-7/8
60B12-1
1-1/4 60B12-1-1/8
60B12-1-3/16
60B12-1-1/4
60B12-1-7/16*
60B13-3/4
60B13-7/8
60B13-1
60B13-1-1/8
1-1/4 60B13-1-3/16
60B13-1-1/4
60B13-1-3/8
60B13-1-7/16*
60B13-1-1/2*
60B14-3/4
60B14-7/8
60B14-1
60B14-1-1/8
60B14-1-3/16
1-1/4 60B14-1-1/4
60B14-1-3/8
60B14-1-7/16
60B14-1-1/2
60B14-1-9/16*
60B14-1-5/8*
49483
15324
15326
36180
15328
36182
36184
36162
15334
36164
15332
56740
36494
15330
15336
36616
15338
15340
15342
15344
36618
15346
36620
15348
15350
15352
15354
15356
15358
15360
15362
36144
15364
36146
15366
15368
15370
15372
15374
36148
36150
60B8
60B9
60B10
15834
15836
15838
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .703”
STANDARD TOLERANCES
Dimension
60B11
15840
Type A
Type B
Bore
Bore
Tolerance
All
All
±.002 –.001
±.001
Reference Pages
60B12
15842
60B13
15844
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 1/4–20 setscrew, 9 to 12
tooth sprockets have 5/16–18 setscrew
and 13 and 14 tooth sprockets have
3/8–16 setscrew, located over keyway
except at 90° where marked.
60B14
15846
†Has recessed groove in hub for chain
clearance.
Boston Gear 800-825-6544
283
Roller Chain Sprockets
Single Strand
No. 60 3/4" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
15
3.607
.459
MAX.
16
P.D.
H
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .703”
17
3.844
4.082
STANDARD TOLERANCES
Dimension
Bore
All
Tolerance
±.001
Reference Pages
18
4.319
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 3/8–16 setscrew, located
over keyway except at 90° where marked.
284
Boston Gear 800-825-6544
19
4.557
3/4
7/8
1
1-1/8
1-3/16
1-1/4
2-7/8
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
3/4
7/8
1
1-1/8
1-3/16
1-1/4
1-3/8 3-1/16
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
1-15/16
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
3-1/4
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
3-1/2
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
3-1/2
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
1-15/16
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
60B15-3/4
60B15-7/8
60B15-1
60B15-1-1/8
60B15-1-3/16
60B15-1-1/4
60B15-1-3/8
60B15-1-7/16
60B15-1-1/2
60B15-1-9/16
60B15-1-5/8
60B15-1-3/4
60B16-3/4
60B16-7/8
60B16-1
60B16-1-1/8
60B16-1-3/16
60B16-1-1/4
60B16-1-3/8
60B16-1-7/16
60B16-1-1/2
60B16-1-9/16
60B16-1-5/8
60B16-1-3/4
60B16-1-15/16
60B17-3/4
60B17-1
60B17-1-1/8
60B17-1-3/16
60B17-1-1/4
60B17-1-3/8
60B17-1-7/16
60B17-1-1/2*
60B17-1-9/16*
60B17-1-5/8*
60B17-1-3/4*
60B18-3/4
60B18-1
60B18-1-1/8
60B18-1-3/16
60B18-1-1/4
60B18-1-3/8
60B18-1-7/16
60B18-1-1/2
60B18-1-9/16
60B18-1-5/8
60B18-1-3/4
60B19-3/4
60B19-1
60B19-1-1/8
60B19-1-3/16
60B19-1-1/4
60B19-1-3/8
60B19-1-7/16
60B19-1-1/2
60B19-1-9/16
60B19-1-5/8
60B19-1-3/4
60B19-1-15/16
36152
36154
15376
36156
15378
15380
15382
15384
15386
36158
15388
15390
36160
36166
15392
36168
15394
15396
15398
15400
15402
36170
15404
36172
15406
49484
15408
21782
21784
15410
21816
21818
15412
45666
45667
15414
49485
15416
21866
21896
15418
21906
21910
15420
21920
21924
15422
21928
15424
45656
46625
15426
45990
45657
15428
45658
45659
15430
45660
60B15
15848
60B16
15850
60B17
15852
60B18
15854
60B19
15856
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 60 3/4" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
20
21
22
23
24
25
26
28
30
P-1930-BG
4.794
5.032
5.270
5.508
5.746
5.984
6.222
6.699
7.175
04/10
3/4
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
3-7/8
4
4
4
4
4
4
4
4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
60B20-3/4
60B20-1
60B20-1-1/8
60B20-1-3/16
60B20-1-1/4
60B20-1-3/8
60B20-1-7/16
60B20-1-1/2
60B20-1-9/16
60B20-1-5/8
60B20-1-3/4
60B20-1-15/16
60B21-3/4
60B21-1
60B21-1-1/4
60B21-1-7/16
60B21-1-1/2
60B21-1-15/16
60B22-3/4
60B22-1
60B22-1-1/4
60B22-1-7/16
60B22-1-1/2
60B22-1-15/16
60B23-3/4
60B23-1
60B23-1-1/4
60B23-1-7/16
60B23-1-1/2
60B23-1-15/16
60B24-3/4
60B24-1
60B24-1-1/4
60B24-1-7/16
60B24-1-1/2
60B24-1-15/16
60B25-3/4
60B25-1
60B25-1-1/4
60B25-1-7/16
60B25-1-1/2
60B25-1-15/16
60B26-3/4
60B26-1
60B26-1-1/4
60B26-1-7/16
60B26-1-1/2
60B26-1-15/16
60B28-3/4
60B28-1
60B28-1-1/4
60B28-1-7/16
60B28-1-1/2
60B28-1-15/16
60B30-3/4
60B30-1
60B30-1-1/4
60B30-1-7/16
60B30-1-1/2
60B30-1-15/16
46576
17152
46577
45661
15432
46578
45662
15434
45663
45664
15436
46579
20034
20040
20132
20142
20846
20858
21550
21570
45669
45688
45689
45690
45744
45691
45698
45699
45700
45702
36020
45703
45704
45705
45706
45707
36022
45745
45711
45712
45713
45714
36024
45746
45715
45716
45717
45718
36030
45721
45722
45734
45735
45736
36036
45738
45749
45765
45795
45775
60B20
15858
60B21
15860
60B22
15862
.459
MAX.
P.D.
60B23
15864
60B24
15866
60B25
15868
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .703”
STANDARD TOLERANCES
60B26
Dimension
Bore
All
Tolerance
±.001
45747
Reference Pages
60B28
45720
60B30
16518
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 3/8–16 setscrew, located
over keyway except at 90° where marked.
Boston Gear 800-825-6544
285
H
Roller Chain Sprockets
Single Strand
No. 60 3/4" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Hub
Dia.
Bore
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
32
.459
MAX.
7.652
35
8.367
36
8.605
40
9.559
P.D.
45
10.752
48
54
11.467
12.899
60
14.330
72
17.194
Reference Pages
H
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 3/8–16 setscrew, located
over keyway.
3/4
1
1-1/4
1-7/16
1-1/2
1-15/16
—
1
1-1/4
1-7/16
1-1/2
1-15/16
1
1-3/16
1-1/4
1-7/16
1-1/2
1-15/16
2-7/16
1-3/16
1-1/4
1-7/16
1-1/2
1-15/16
2-7/16
1-3/16
1-3/16
1-3/16
1-7/16
1-1/2
1-15/16
2-7/16
1-1/4
4
1-1/4
4
1-1/4
4
1-1/4
4-1/4
1-1/4
4-1/4
1-1/4
4-1/4
4-1/4
1-1/4
1-3/4
4-1/4
1-3/4
4-1/4
2
60B32-3/4
60B32-1
60B32-1-1/4
60B32-1-7/16
60B32-1-1/2
60B32-1-15/16
—
60B35-1
60B35-1-1/4
60B35-1-7/16
60B35-1-1/2
60B35-1-15/16
—
60B40-1-3/16
60B40-1-1/4
60B40-1-7/16
60B40-1-1/2
60B40-1-15/16
60B40-2-7/16
60B45-1-3/16
60B45-1-1/4
60B45-1-7/16
60B45-1-1/2
60B45-1-15/16
60B45-2-7/16
—
—
—
60B60-1-7/16
60B60-1-1/2
60B60-1-15/16
60B60-2-7/16
—
49486
49847
49488
49489
49490
49491
—
45779
45780
45793
45784
45796
—
45843
45844
45845
45846
45848
45849
61668
61673
46463
61677
61679
61680
—
—
—
46464
46465
61869
61870
—
60B32
16520
—
60B35
—
45778
60B36
60B40
16522
16524
60B45
16528
60B48
60B54
60B60
16530
16532
16534
60B72
16538
Double Strand
No. 60 2-3/4" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Hub
Dia.
Bore
Length
thru
Bore
Without Keyway
& Setscrew*
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
1.341
.580
15
16
17
18
19
20
21
25
3.607
3.844
4.082
4.319
4.557
4.794
5.032
5.984
1
2-13/16
3
3-1/4
3-1/2
3-11/16
3-3/4
4-1/8
4-1/4
2-1/8
D60B15
D60B16
D60B17
D60B18
D60B19
D60B20
D60B21
D60B25
15992
15994
15996
15998
16000
16002
16004
16006
STANDARD TOLERANCES
P.D.
Dimension
Bore
All
Tolerance
±.001
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .703”
.444
MAX
286
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 80 1" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
TYPE A NO HUB STEEL
16
5.126
17
5.442
18
5.759
19
6.079
20
6.392
21
6.710
22
7.027
23
7.344
24
7.661
25
7.979
26
8.296
30
9.567
36
11.474
40
12.745
48
15.290
50
15.926
60
19.107
15/16
1-3/16
1-1/4
Catalog
Number
Item
Code
80A16
80A17
80A18
80A19
80A20
80A21
80A22
80A23
80A24
80A25
80A26
80A30
80A36
80A40
80A48
80A54
80A60
16356
16358
16360
16362
16364
16366
16368
16370
16372
16374
16376
16378
16382
16384
16388
46555
16392
TYPE A
TYPE B
.575
MAX.
.575
MAX.
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
P.D.
P.D.
TYPE B SINGLE HUB STEEL
8
2.613
9
2.924
10
3.236
11
12
3.549
3.864
1
1
1-1/8
1-3/16
1-1/4
1
1-1/8
1-3/16
1-1/4
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1
1-1/8
1-3/16
1-1/4
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
1-15/16
2-1/4†
2-9/16†
2-13/16†
3-1/8†
1-5/8 80B8-1*
80B9-1*
1-5/8 80B9-1-1/8*
80B9-1-3/16*
80B9-1-1/4*
80B10-1
1-5/8 80B10-1-1/8
80B10-1-3/16
80B10-1-1/4
80B11-1
80B11-1-1/8
80B11-1-3/16
80B11-1-1/4
1-5/8 80B11-1-3/8
80B11-1-7/16
80B11-1-1/2*
80B11-1-9/16*
80B11-1-5/8*
80B12-1
80B12-1-1/8
80B12-1-3/16
80B12-1-1/4
1-5/8 80B12-1-3/8
80B12-1-7/16
80B12-1-1/2
80B12-1-9/16
80B12-1-5/8
80B12-1-3/4
46489
46490
46491
15438
46492
15440
46493
46494
15442
46495
46496
15444
15446
63651
15448
15450
46497
15452
63653
63654
63655
15454
63656
15456
15458
63657
15460
15462
80B8
80B9
H
15870
15872
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .875”
80B10
15874
STANDARD TOLERANCES
80B11
15876
Dimension
Type A
Bore
Type B
Bore
All
All
Tolerance
±.002 –.001
±.001
Reference Pages
80B12
15878
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 3/8–16 setscrew, located
over keyway except at 90° where marked.
†Has recessed groove in hub for chain
clearance.
P-1930-BG
04/10
Boston Gear 800-825-6544
287
Roller Chain Sprockets
Single Strand
No. 80 1" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Dia.
Bore
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
13
4.179
.575
MAX.
P.D.
H
14
4.494
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .875”
STANDARD TOLERANCES
Dimension
Bore
All
15
4.810
Tolerance
±.001
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 3/8–16 setscrew, located
over keyway.
†Has recessed groove in hub for chain
clearance.
288
Boston Gear 800-825-6544
16
17
5.126
5.442
1
80B13-1
63658
1-1/8
80B13-1-1/8 63659
1-3/16
80B13-1-3/16 63662
1-1/4
80B13-1-1/4 15464
1-3/8
80B13-1-3/8 63664
1-7/16
80B13-1-7/16 15466
1-1/2
3
1-1/2 80B13-1-1/2 15468
1-9/16
80B13-1-9/16 63666
1-5/8
80B13-1-5/8 15470
1-3/4
80B13-1-3/4 15472
1-7/8
80B13-1-7/8 63667
1-15/16
80B13-1-15/16 15474
2
80B13-2
15476
1
80B14-1
63669
1-1/8
80B14-1-1/8 63670
1-3/16
80B14-1-3/16 63708
1-1/4
80B14-1-1/4 15478
1-3/8
80B14-1-3/8 63709
1-7/16
3-1/4 1-1/2 80B14-1-7/16 15480
1-1/2
80B14-1-1/2 15482
1-9/16
80B14-1-9/16 63710
1-5/8
80B14-1-5/8 15484
1-3/4
80B14-1-3/4 15486
1-7/8
80B14-1-7/8 63711
1-15/16
80B14-1-15/16 15488
1
80B15-1
63712
1-1/8
80B15-1-1/8 46498
1-3/16
80B15-1-3/16 46499
1-1/4
80B15-1-1/4 15492
1-7/16
80B15-1-7/16 15494
1-1/2 3-13/16 1-1/2 80B15-1-1/2 15496
1-9/16
80B15-1-9/16 63725
1-5/8
80B15-1-5/8 15498
1-3/4
80B15-1-3/4 15500
1-7/8
80B15-1-7/8 63726
1-15/16
80B15-1-15/16 15502
2
80B15-2
15504
1
80B16-1
35932
1-1/4
80B16-1-1/4 63734
1-3/8
80B16-1-3/8 63735
1-7/16
80B16-1-7/16 63736
1-1/2
4
1-1/2 80B16-1-1/2 63737
1-9/16
80B16-1-9/16 63738
1-5/8
80B16-1-5/8 46500
1-3/4
80B16-1-3/4 46501
1-15/16
80B16-1-15/16 63765
1
80B17-1
63775
1-1/4
80B17-1-1/4 63776
1-3/8
80B17-1-3/8 63777
1-7/16
80B17-1-7/16 46502
1-1/2
4
1-1/2 80B17-1-1/2 46503
1-9/16
80B17-1-9/16 46504
1-5/8
80B17-1-5/8 46505
1-3/4
80B17-1-3/4 46506
1-15/16
80B17-1-15/16 46507
80B13
15880
80B14
15882
80B15
15884
80B16
15886
80B17
15888
P-1930-BG
04/10
Roller Chain Sprockets
Single Strand
No. 80 1" Pitch; Steel
ORDER BY CATALOG NUMBER OR ITEM CODE
No.
of
Teeth
Pitch
Bore
Diameter
Hub
Dia.
With Keyway
Length
& Setscrew*
thru
Item
Bore Catalog
Number
Code
Without Keyway
or Setscrew
Catalog
Item
Number
Code
TYPE B SINGLE HUB STEEL
18
19
20
21
22
23
24
25
26
30
36
40
48
60
5.759
6.076
6.076
6.710
7.027
7.344
7.661
7.979
8.296
9.567
11.474
12.745
15.290
19.107
1
1-1/4
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-3/4
1-15/16
2
1
1-1/4
1-7/16
1-1/2
1-5/8
1-3/4
1-15/16
2
2-7/16
1
1-1/4
1-7/16
1-1/2
1-5/8
1-3/4
1-15/16
2
2-7/16
1
1
1
1
1
1-1/4
1-3/16
1-3/16
1-3/16
1-1/4
1-1/4
4-1/4
4-1/4
4-1/4
4-1/4
4-1/4
4-1/4
4-1/4
4-1/4
4-3/4
4-3/4
4-3/4
4-3/4
4-3/4
5-1/4
1-1/2
1-1/2
1-1/2
1-3/4
1-3/4
1-3/4
1-3/4
1-3/4
2
2
2
2
2
2
80B18-1
80B18-1-1/4
80B18-1-3/8
80B18-1-7/16
80B18-1-1/2
80B18-1-9/16
80B18-1-5/8
80B18-1-3/4
80B18-1-15/16
80B18-2
80B19-1
80B19-1-1/4
80B19-1-7/16
80B19-1-1/2
80B19-1-5/8
80B19-1-3/4
80B19-1-15/16
80B19-2
80B19-2-7/16
80B20-1
80B20-1-1/4
80B20-1-7/16
80B20-1-1/2
80B20-1-5/8
80B20-1-3/4
80B20-1-15/16
80B20-2
80B20-2-7/16
—
—
—
—
—
—
—
—
—
—
—
46509
46510
46511
46512
46513
63816
63820
63903
46514
63905
63911
63912
63935
63936
63951
63953
63954
63955
63956
21968
63962
63963
63964
63965
63966
63967
63969
63970
—
—
—
—
—
—
—
—
—
—
—
80B18
15890
80B19
15892
80B20
15892
.575
MAX.
P.D.
80B21
80B22
80B23
80B24
80B25
80B26
80B30
80B36
80B40
80B48
80B60
15896
15898
16544
16546
16548
16550
16552
16556
16558
16562
16566
MAXIMUM DIA. OF CHAIN OVER
SPROCKET = SPROCKET P.D. + .875”
STANDARD TOLERANCES
Dimension
Bore
All
Tolerance
±.001
Reference Pages
Alterations – 316
Horsepower Ratings – 260-262
Lubrication – 259
Materials – 316
Selection Procedure – 258
ANSI Diameters – 317
*All sprockets have standard keyway. All
sprockets have 3/8–16 setscrew, located
over keyway.
P-1930-BG
04/10
Boston Gear 800-825-6544
289
H
Block Chain Sprockets
Type B Single Hub for 5/16" Wide B504 Block Chain
Block Chain Sprockets*; Steel and Iron
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Teeth
Pitch
Diam.
Bore
Hub
Diameter Project
Style
Catalog
Number
Item
Code
STEEL
6
1.94
7
2.25
8
2.57
CAST IRON
9
2.88
10
3.20
12
3.83
5/8
5/8
5/8
1-3/8
1-11/16
2
3/4
3/4
3/4
A
A
A
H917
H918
H919
14876
14878
14880
5/8
5/8
5/8
1-1/2
1-1/2
1-3/4
3/4
5/8
5/8
A
B
B
H920
H921
H922
16594
16596
16598
STANDARD TOLERANCES
.284
MAX.
P.D.
Dimension
Bore
All
Tolerance
±.001 – .000
Reference Pages
Alterations – 316
Materials – 316
*For Block Chain refer to Page 253.
H
290
Boston Gear 800-825-6544
P-1930-BG
04/10
Ladder Chain Sprockets
Type B Single Hub
Nos. 1A and 1; Bronze and Steel (All Sprockets Equipped with Standard Setscrews, Except CBA 8)
ORDER BY CATALOG NUMBER OR ITEM CODE
Teeth
Pitch
Diam.
Bore
Hub
Diameter Project
Style
Catalog
Number
Item
Code
No. 1A
BRONZE SPROCKETS
8
10
12
15
18
20
24
32
36
.48
.60
.71
.88
1.06
1.18
1.41
1.88
2.12
1/8
1/8
3/16
3/16
3/16
3/16
3/16
1/4
5/16
5/16†
3/8
7/16
7/16
1/2
5/8
3/4
5/8
3/4
7/32
7/32
7/32
7/32
1/4
1/4
1/4
5/16
3/8
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
CBA8
CBA10
CBA12
CBA15B
CBA18B
CBA20B
CBA24B
CBA32
CBA36
16856
16858
16860
16862
16864
16866
16868
16870
16872
3/16
3/16
1/4
1/4
1/4
1/4
5/16
5/16
5/16
3/8
3/8
3/8†
7/16†
1/2†
9/16†
11/16†
3/4†
7/8†
7/8
7/8
1-1/4
1-1/4
1/2
1/2
1/2
1/2
1/2
1/2
1/2
13/32
13/32
1/2
1/2
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
CA7
CA8
CA9
CA10
CA12
CA14
CA16
CA20
CA24
CA34
CA42
14780
14782
14784
14786
14788
14790
14792
14794
14796
14798
14800
BRONZE SPROCKETS
6
.57
3/16
8
.75
3/16
10
.93
3/16
11
1.01
3/16
12
1.10
3/16
14
1.28
1/4
24
2.19
5/16
32
2.92
5/16
11/32†
1/2
1/2
1/2
1/2
5/8
3/4
3/4
1/4
1/4
1/4
1/4
1/4
5/16
3/8
3/8
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
CB1 6
CB1 8
CB1 10
CB1 11
CB1 12
CB1 14
CB1 24
CB1 32
16878
16880
16882
16884
16886
16890
16900
16904
STEEL SPROCKETS
7
.42
8
.48
9
.54
10
.60
12
.71
14
.83
16
.95
20
1.18
24
1.41
34
2.00
42
2.47
No. 1
.087
7/32
5/32
P.D.
H
.087
3/32
P.D.
†Has Recessed Groove in Hub for Chain Clearance
STANDARD TOLERANCES
Dimension
Bore
All
Tolerance
±.001
.120
7/32
7/32
P.D.
P-1930-BG
04/10
Boston Gear 800-825-6544
291
Ladder Chain Sprockets
Type B Single Hub
Nos. 1-2 and 2-1/2; Bronze and Steel (All Sprockets Have Standard Setscrews)
Teeth
Pitch
Diam.
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Hub
Catalog
Bore
Style
Number
Diameter Project
Item
Code
No. 1
STEEL SPROCKETS
6
.57
7
.66
8
.75
10
.93
12
1.10
14
1.28
16
1.46
20
1.83
26
2.37
32
2.92
Nos. 2 and 2-1/2
1/4
1/4
5/16
5/16
5/16
5/16
5/16
1/2
1/2
1/2
1/2**
9/16**
11/16**
7/8**
7/8
7/8
7/8
1-3/8
1-3/8
1-3/8
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
3/16
1/4
1/4
5/16
5/16
5/16
3/8
9/16
5/8
5/8
3/4
3/4
3/4
7/8
5/16
5/16
5/16
3/8
3/8
3/8
7/16
Web
Web
Web
Web
Web
Web
Spoke
3/8
3/8
3/8
1/2
1/2
1/2
1/2
1/2
13/16†
15/16†
1-1/32†
1-1/4†
1-1/4
1-15/32
1-1/2
1-5/8
11/16
11/16
11/16
11/16
11/16
11/16
11/16
11/16
Plain
Plain
Plain
Plain
Plain
Plain
Plain
Plain
C1 6
C1 7
C1 8
C1 10
C1 12
C1 14
C1 16
C1 20
C1 26
C1 32
14810
14812
14814
14818
14820
14822
14824
14826
14828
14830
CB3 10
CB3 12
CB3 16
CB3 20
CB3 22
CB3 24
CB3 45
16920
16922
16924
16926
16928
16930
16936
C3 8
C3 9
C3 10
C3 12
C3 14
C3 16
C3 20
C3 30
14842
14844
14846
14850
14852
14854
14856
14860
BRONZE SPROCKETS
.120
3/32
P.D.
10
12
16
20
22
24
45
1.14
1.36
1.81
2.26
2.48
2.70
5.06
STEEL SPROCKETS
8
.92
9
1.03
10
1.14
12
1.36
14
1.59
16
1.81
20
2.26
30
3.38
H
.170
**Blind hole—3/4” deep from Hub End.
†Has Recessed Groove in Hub for Chain Clearance
P.D.
STANDARD TOLERANCES
Dimension
Bore
All
Tolerance
±.001
3/32
170
P.D.
292
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chain Drive Tensioners
Screw Adjustable/Spring Adjustable/Shaft Mounted
Non-Adjustable (Drive Positioners)
Boston Gear chain drive tensioners improve drive
performance by eliminating whipping and slipping of loose
chains. They reduce vibration, noise and maintenance and
provide additional life to drive components. They are also
suitable for flat-face and V-Belt drive systems and are
provided with a grease fitting for lubricating idler bearings
other than Bost-Bronz.
All tensioners are constructed of structural steel and are
available for use with Roller Chains up to 1-1/2” Piitch. No.
120.
Installation Instructions
• Idlers should be located on the slack side of the drive chain.
• Chain idlers should be run on the outside of the chain.
• Idler sprockets should have at least three teeth engaged
with the chain.
• Idlers, when used on the outside of the drive, should be
located approximately 1/3 of the center distance from the
large sprocket.
• Idlers, when used on the inside of the drive, should be
located approximately 1/3 of the center distance from the
large sprocket.
• Tensioning that is too tight causes excessive wear on the
chain and bearings.
• Tensioning that is too loose allows chain vibration, causing
loss of horsepower or wear.
H
Idler Sprockets
ORDER BY CATALOG NUMBER OR ITEM CODE
For Use
with
Chain No.
Hole
Diameter
35
1/2
1/2
40
7/8
1/2
41
7/8
50
7/8
7/8
60
1-1/8
80
P-1930-BG
1-1/8
04/10
No.
of
Teeth
12
15
18
9
12
15
12
15
18
9
12
15
15
18
12
15
18
12
15
18
12
15
18
12
15
18
Catalog
Number
Item
Code
35B12TI-8
35B15TI-8
35B18TI-8
40B9TI-8
40B12TI-8
40B15TI-8
40B12TI-14
40B15TI-14
40B18TI-14
41B9TI-8
41B12TI-8
41B15TI-8
41B15TI-14
41B18TI-14
50B12TI-14
50B15TI-14
50B18TI-14
60B12TI-14
60B15TI-14
60B18TI-14
60B12TI-18
60B15TI-18
60B18TI-18
80B12TI-18
80B15TI-18
80B18TI-18
48901
48902
48903
48904
48905
48906
48910
48911
48912
48907
48908
48909
48913
48914
48915
48916
48917
48918
48919
48920
48921
48922
48923
48924
48925
48926
Boston stocks a wide range of idler sprockets for use with its
chain drive tensioners and positioners. In addition special
sizes and configurations can be furnished to order. All idlers
are equipped with Bost-Bronz, oil impregnated bushings.
Grease lubrication is not recommended. Use normal
relubrication procedure for oil-impregnated bearings.
Boston Gear 800-825-6544
293
Roller Chain Drive Tensioners
Type LG
Shaft Mounted
B
G
E
MAX.
IDLER
SHAFT
5/16"
F
This shaft-mounted tensioner is best suited for applications
where it is impractical to bolt the tensioner on a frame. This
tensioner can be mounted at any point on a shaft and is
adjustable to any location in a 360° arc on the shaft.
J
ORDER BY CATALOG NUMBER OR ITEM CODE
D
1/4"
GREASE GREASE
FITTING
PORT
A
L
Suggested
Chain Number*
COLLAR
35, 40, 41
40, 50, 60
80, 100, 120
H
C
K
Catalog
Number
Item
Code
0-LG
1-LG
2-LG
48888
48889
48890
*Single-strand chain. For multiple strand chain, use larger tensioner.
ALL DIMENSIONS IN INCHES
Size
A
0-LG
1-LG
2-LG
4
6
8
B
C
D
E
F
G
H
J
K
L
7/8
3/4 .500
1 2-1/2 1-9/16 7/8 1/16 1-5/8 .500
1-1/4
1
.875 1-3/4 4 2-15/32 1-3/16 3/32 2-1/8 .875
1-1/2 1-1/4 1.125 2-7/8 5-1/2 3-21/32 1-3/8 1/8 2-3/4 1.125
Type BG
H
Screw Adjustable
These Boston Gear tensioners use a screw for precise, easily
adjustable tension, to provide maximum life for the sprocket
and chain. These tensioners are useful on vertical drives to
prevent lower sprocket disengagement and on heavy chains
where slack is normally taken up by hand, while making the
adjustment. With these tensioners chain take-up and tension
are both controlled with the screw.
Many drive systems are enclosed for safety reasons. With
conventional tensioners, the enclosure must be removed for
drive adjustment. With Boston tensioners adjustments can be
made to the head of the screw, substantially reducing cost
maintenance and drive down time. The screw is adjustable from
either end of the tensioner.
H
E
MAX.
B
P
J
L
M
G
K
ORDER BY CATALOG NUMBER OR ITEM CODE
5/16"
F
MAX.
Suggested
Chain Number*
IDLER
SHAFT
C A
35, 40, 41
40, 50, 60
80, 100, 120
1/4"
GREASE
FITTING
D
GREASE
COLLAR PORT
Catalog
Number
Item
Code
0-BG
1-BG
2-BG
48878
48879
48880
*Single-strand chain. For multiple strand chain, use larger tensioner.
2G
ADJUSTING SCREW
G
ALL DIMENSIONS IN INCHES
294
Size
A
B
C
D
E
F
G
2G
H
J
K
L
M
P
Wgt.
0-BG
1-BG
2-BG
5-7/8
9
13
1-1/2
2
3
5-1/4
8-1/8
11-7/8
.500
.875
1.125
1
1-3/4
2-7/8
2-1/2
4-1/2
6
9/32
11/32
9/16
3/8
1/2
3/4
2-13/16
4
5-11/16
1-5/16
1-5/8
2-5/32
1-3/8
1-3/4
2-7/8
1-1/4
1-1/2
2
3/8
1/2
5/8
3/4
1
1-1/2
1 LB.
2-1/2 LB.
6 LB.
Boston Gear 800-825-6544
P-1930-BG
04/10
Roller Chain Drive Tensioners
Type BG
Spring Adjustable
The Boston Gear Series 50 Tensioner is a screw-adjustable tensioner with
a spring-loaded pivot arm. The arm maintains tension on the chain and
automatically takes up the slack due to cycle loading or wear. It offers all
the advantages of the screw adjustable tensioner plus the automatic takeup feature, which substantially reduces maintenance. The double-coil
spring is loaded by turning the adjustment screw in the base of the unit,
forcing the idler arm against the slack side of the chain.
The Series 60 Tensioner has a spring-loaded pivot arm but does not have
the screw-type adjustment. It is used in lighter applications (#35-#60 chain)
when automatic take-up is desired. Since the pivot arm must be adjusted
by hand, the mounting location of the tensioner is important.
On both the Series 50 and 60 Tensioners, the pivot arm swings 90° from
the center line in either direction, however, it must be positioned to swing
in the direction of chain travel.
ORDER BY CATALOG NUMBER OR ITEM CODE
Suggested
Chain Number*
Available
Load at Idler
Shaft @90°
40, 50, 60
80, 100, 120
35, 40, 41
50, 60
63 Lbs.
105 Lbs.
32.2 Lbs.
33.3 Lbs.
Catalog
Number
Item
Code
51-BG
52-BG
60-BG
61-BG
48883
48884
48886
48887
Series 50 dimensions
B
H
L
E
MAX.
M
DIRECTION
OF CHAIN
TRAVEL
G
K
IDLER
SHAFT
5/16"
*Single-strand chain. For multiple strand chain, use large tensioner.
Available load at idler shaft is the maximum amount of force on the chain
developed by the spring loaded arm when deflected 90° to either side of
the neutral position.
PIV
AR OT
M
F
MAX.
J
RAD
The basic spring preload is 20% of the total capability. The load curve is a
straight line proportion of load to angle of deflection. Upon request, lighter
springs can be supplied for all units. Heavier springs (to 150% of above
capacity) can be furnished for all units except #60BG and #61BG.
D
GREASE
PORT
COLLAR
A
C
H
1/4"
GREASE
FITTING
COIL SPRING
2G
ADJUSTING SCREW
G
Depending on application, please allow a service factor for spring capacity.
Springs are shot-peened for longer life.
ALL DIMENSIONS IN INCHES
Size
A
B
C
D
E
F
G
2G
H
J
K
L
M
Wgt.
51BG
52BG
9
13
2
3
8-1/8
11-7/8
.875
1.125
1-3/4
2-7/8
2-1/2
4
11/32
9/16
1/2
3/4
5-3/8
7-13/16
4-1/4
4-3/4
3
3-7/8
1
1-1/2
1/2
5/8
5 Lb.
10 Lb.
Series 60 Dimensions
H
E
MAX.
F
5/16"
DIRECTION OF
CHAIN TRAVEL
COLLAR
PIVOT ARM
D
K
IDLER
SHAFT
B
RAD.
G
GREASE
PORT
C
A
J
COIL
SPRING
ALL DIMENSIONS IN INCHES
Size
A
B
C
D
E
F
G
2G
H
J
K
L
M
Wgt.
60BG
61BG
4
5-1/2
4-3/4
6
3-3/8
4-3/4
.500
.875
1
1-3/4
1-3/8
1-7/8
7-3/8
9-1/2
—
—
2-7/8
4-1/4
9/32
13/32
1/4
5/16
—
—
—
—
2 Lb.
5 Lb.
P-1930-BG
04/10
Boston Gear 800-825-6544
295
Roller Chain Drive Tensioners
Type HG
Drive Positioners
The Type HG is an angle-mounted positioner which can be
mounted on any flat horizontal surface. Its variety of sizes provides advantages not enjoyed from competitive brands.
ORDER BY CATALOG NUMBER OR ITEM CODE
Suggested
Chain Number*
35, 40, 41
40, 50, 60
80, 100, 120
Catalog
Number
Item
Code
0-HG
1-HG
2-HG
48897
48898
48899
*Single-strand chain. For multiple strand chain, use larger tensioner.
P
GREASE
PORT
D
5/16
C
A
C
E
MAX.
M
F
B
J
G
L
H
GREASE
FITTING
K
O
IDLER
SHAFT
H
ALL DIMENSIONS IN INCHES
Size
A
B
C
D
E
F
0-HG
1-HG
2-HG
2-3/4
4
5
1/4
5/16
7/16
1
1-1/2
1-3/4
1/2
7/8
1-1/8
1
1-3/4
2-7/8
1-1/2
2-3/8
3-17/32
G
H
1-9/16
3-1/16
2-15/32 4-15/32
3-5/8
6-21/32
J
K
L
M
O
P
7/8
1-1/8
1-3/4
2
3
4
1-1/2
2
3
1--3/8
2
2-1/2
1-1/2
2-1/16
3
11/32
13/32
9/16
Type UG
Drive Positioners
The Type UG drive positioner is a fixed idler bracket which
provides chain support. Available in a variety of sizes. Type
UG positioners can be mounted on any flat, vertical surface.
P
M
B
J
K
K
ORDER BY CATALOG NUMBER OR ITEM CODE
C
A
GREASE
FITTING
F
H
E
MAX.
Suggested
Chain Number*
5/16"
D
35, 40, 41
40, 50, 60
80, 100, 120
IDLER
SHAFT
GREASE
PORT
Catalog
Number
Item
Code
0-UG
1-UG
2-UG
48893
48894
48895
*Single-strand chain. For multiple strand chain, use larger tensioner.
G
L
ALL DIMENSIONS IN INCHES
Size
A
B
C
D
E
F
G
H
J
K
L
M
P
0-UG
1-UG
2-UG
2-3/4
4
5
1-1/2
2
3
2
3
3-1/2
1/2
7/8
1-1/8
1
1-3/4
2-7/8
1-1/2
2-3/8
3-17/32
7/16
9/16
3/4
2-3/16
3-1/4
4-25/32
3/4
1
1-1/2
1
1-1/2
1-3/4
1/4
5/16
1/2
1-3/8
2
2-1/2
11/32
13/32
9/16
296
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Section Contents
SPUR GEARS
Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298-299
Involute Form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Diametral Pitch / Pressure Angle / Tooth Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Backlash / Undercut / Formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302
Lewis Formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
HELICAL GEARS
Nomenclature / Helix Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
Formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Thrust Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
MITER & BEVEL GEARS
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Mounting Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
Tooth Strength / Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
WORMS & WORM GEARS
Hand / Efficiency / Thrust Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Formulas / Self-Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
COUPLING / UNIVERSAL JOINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
GENERAL INFORMATION
How To Figure Horsepower & Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Mountings / Alterations / Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
I
Materials / Styles / Keyways & Setscrews . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Sprockets, Sprocket Diameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316-318
Horsepower & Torque Capacity oOf Shafting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Temperature Conversion Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Equivalent Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321
Metric Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Application Classifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323-324
INDEX TO CATALOG NUMBERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325-328
P-1930-BG
04/10
Boston Gear 800-825-6544
297
Engineering Information
Spur Gears
Gear Nomenclature
ADDENDUM (a) is the height by which a tooth projects
beyond the pitch circle or pitch line.
BASE DIAMETER (Db) is the diameter of the base cylinder
from which the involute portion of a tooth profile is generated.
BACKLASH (B) is the amount by which the width of a tooth
space exceeds the thickness of the engaging tooth on the
pitch circles. As actually indicated by measuring devices,
backlash may be determined variously in the transverse,
normal, or axial-planes, and either in the direction of the pitch
circles or on the line of action. Such measurements should be
corrected to corresponding values on transverse pitch circles
for general comparisons.
BORE LENGTH is the total length through a gear, sprocket,
or coupling bore.
CIRCULAR PITCH (p) is the distance along the pitch circle or
pitch line between corresponding profiles of adjacent teeth.
CIRCULAR THICKNESS (t) is the length of arc between the
two sides of a gear tooth on the pitch circle, unless otherwise
specified.
CLEARANCE-OPERATING (c) is the amount by which the
dedendum in a given gear exceeds the addendum of its
mating gear.
CONTACT RATIO (m c) in general, the number of angular
pitches through which a tooth surface rotates from the
beginning to the end of contact.
I
GEAR is a machine part with gear teeth. When two gears
run together, the one with the larger number of teeth is called
the gear.
HUB DIAMETER is outside diameter of a gear, sprocket or
coupling hub.
HUB PROJECTION is the distance the hub extends beyond
the gear face.
INVOLUTE TEETH of spur gears, helical gears and worms are
those in which the active portion of the profile in the
transverse plane is the involute of a circle.
LONG- AND SHORT-ADDENDUM TEETH are those of
engaging gears (on a standard designed center distance) one
of which has a long addendum and the other has a short
addendum.
KEYWAY is the machined groove running the length of the
bore. A similar groove is machined in the shaft and a key fits
into this opening.
NORMAL DIAMETRAL PITCH (P n ) is the value of the
diametral pitch as calculated in the normal plane of a helical
gear or worm.
NORMAL PLANE is the plane normal to the tooth surface at a
pitch point and perpendicular to the pitch plane. For a helical
gear this plane can be normal to one tooth at a point laying
in the plane surface. At such point, the normal plane contains
the line normal to the tooth surface and this is normal to the
pitch circle.
DEDENDUM (b) is the depth of a tooth space below the pitch
line. It is normally greater than the addendum of the mating
gear to provide clearance.
NORMAL PRESSURE ANGLE (øn) in a normal plane of helical
tooth.
DIAMETRAL PITCH (P) is the ratio of the number of teeth to
the pitch diameter.
OUTSIDE DIAMETER (Do) is the diameter of the addendum
(outside) circle.
FACE WIDTH (F) is the length of the teeth in an axial plane.
FILLET RADIUS (rf) is the radius of the fillet curve at the base
of the gear tooth.
FULL DEPTH TEETH are those in which the working depth
equals 2.000 divided by the normal diametral pitch.
298
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Spur Gears
Gear Nomenclature (Continued)
ROOT DIAMETER (Dr) is the diameter at the base of the tooth
space.
PITCH CIRCLE is the circle derived from a number of teeth
and a specified diametral or circular pitch. Circle on which
spacing or tooth profiles is established and from which the
tooth proportions are constructed.
PRESSURE ANGLE—OPERATING (ør) is determined by the
center distance at which the gears operate. It is the pressure
angle at the operating pitch diameter.
PITCH CYLINDER is the cylinder of diameter equal to the
pitch circle.
TIP RELIEF is an arbitrary modification of a tooth profile
whereby a small amount of material is removed near the tip of
the gear tooth.
PINION is a machine part with gear teeth. When two gears
run together, the one with the smaller number of teeth is
called the pinion.
UNDERCUT is a condition in generated gear teeth when any
part of the fillet curve lies inside a line drawn tangent to the
working profile at its point of juncture with the fillet.
PITCH DIAMETER (D) is the diameter of the pitch circle. In
parallel shaft gears, the pitch diameters can be determined
directly from the center distance and the number of teeth.
WHOLE DEPTH (ht) is the total depth of a tooth space, equal
to addendum plus dedendum, equal to the working depth
plus variance.
PRESSURE ANGLE (ø) is the angle at a pitch point between
the line of pressure which is normal to the tooth surface, and
the plane tangent to the pitch surface. In involute teeth,
pressure angle is often described also as the angle between
the line of action and the line tangent to the pitch circle.
Standard pressure angles are established in connection with
standard gear-tooth proportions.
WORKING DEPTH (hk) is the depth of engagement of two
gears; that is, the sum of their addendums.
Tooth Parts
PINION
PINION
PITCH CIRCLE
LINE OF ACTION
OUTSIDE
DIA.
PRESSURE
ANGLE
TOOTH PROFILE
(INVOLUTE)
I
BASE CIRCLE
PITCH CIRCLE
WHOLE DEPTH
WORKING
DEPTH
CENTER
DISTANCE
CLEARANCE
ADDENDUM
DEDENDUM
CIRCULAR TOOTH
THICKNESS
ROOT (TOOTH)
FILLET
ROOT
DIA.
CIRCULAR
PITCH
GEAR
GEAR
P-1930-BG
04/10
Boston Gear 800-825-6544
299
Engineering Information
Spur Gears
Involute Form
Gear teeth could be manufactured with a wide variety of
shapes and profiles. The involute profile is the most
commonly used system for gearing today, and all Boston spur
and helical gears are of involute form.
An involute is a curve that is traced by a point on a taut cord
unwinding from a circle, which is called a BASE CIRCLE. The
involute is a form of spiral, the curvature of which becomes
straighter as it is drawn from a base circle and eventually
would become a straight line if drawn far enough.
EA
CIRCL
I
E–
UT
OL
V
N
An involute drawn from a larger base circle will be less curved
(straighter) than one drawn from a smaller base circle.
Similarly, the involute tooth profile of smaller gears is
considerably curved, on larger gears is less curved
(straighter), and is straight on a rack, which is essentially an
infinitely large gear.
E–
C
B
CI
LE
E
CL
A
C
IR
R
INVOLUT
C
IR
CLE
B
I
Involute gear tooth forms and standard tooth proportions are
specified in terms of a basic rack which has straight-sided
teeth, for involute systems.
20 TEETH
300
Boston Gear 800-825-6544
48 TEETH
RACK
P-1930-BG
04/10
Engineering Information
Spur Gears
Diametral Pitch System
All stock gears are made in accordance with the diametral
pitch system. The diametral pitch of a gear is the number of
teeth in the gear for each inch of pitch diameter. Therefore,
the diametral pitch determines the size of the gear tooth.
Pressure Angle
Pressure angle is the angle at a pitch point between the line of
pressure which is normal to the tooth surface, and the plane
tangent to the pitch surface. The pressure angle, as defined in
this catalog, refers to the angle when the gears are mounted on
their standard center distances.
Boston Gear manufactures both 14-1/2° and 20° PA, involute,
full depth system gears. While 20°PA is generally recognized
as having higher load carrying capacity, 14-1/2°PA gears
have extensive use. The lower pressure angle results in less
change in backlash due to center distance variation and
concentricity errors. It also provides a higher contact ratio and
consequent smoother, quieter operation provided that
undercut of teeth is not present.
I
Tooth dimensions
For convenience, Tooth Proportions of various standard
diametral pitches of Spur Gears are given below.
Circular
Diametral
Pitch
Pitch
(Inches)
3
4
5
6
8
10
12
16
20
24
32
48
64
P-1930-BG
1.0472
.7854
.6283
.5236
.3927
.3142
.2618
.1963
.1571
.1309
.0982
.0654
.0491
04/10
Thickness
of Tooth
Depth to be
on Pitch
Cut in Gear
Line
(Inches)
Addendum
(Inches) (Hobbed Gears)
(Inches)
.5236
.3927
.3142
.2618
.1963
.1571
.1309
.0982
.0785
.0654
.0491
.0327
.0245
.7190
.5393
.4314
.3565
.2696
.2157
.1798
.1348
.1120
.0937
.0708
.0478
.0364
.3333
.2500
.2000
.1667
.1250
.1000
.0833
.0625
.0500
.0417
.0312
.0208
.0156
Boston Gear 800-825-6544
301
Engineering Information
Spur Gears
Backlash
Spur Gear Formulas
Stock spur gears are cut to operate at standard center
distances. The standard center distance being defined by:
FOR FULL DEPTH INVOLUTE TEETH
Standard Center Distance = Pinion PD + Gear PD
2
When mounted at this center distance, stock spur gears will
have the following average backlash:
Diametral
Pitch
Backlash
(Inches)
Diametral
Pitch
Backlash
(Inches)
3
4
5
6
7
.013
.010
.008
.007
.006
8-9
10-13
14-32
33-64
.005
.004
.003
.0025
For 14-1/2°–Change in Center Distance = 1.933 x Change in Backlash
For 20°
–Change in Center Distance = 1.374 x Change in Backlash
From this, it is apparent that a given change in center
distance, 14-1/2° gears will have a smaller change in
backlash than 20° gears. This fact should be considered in
cases where backlash is critical.
Undercut
Diametral Pitch (P)
Circular Pitch (p)
Base Diameter (Db)
Number of Teeth (N)
Tooth Thickness (t)
@Pitch Diameter (D)
Addendum (a)
Outside
Diameter (Do)
Whole Depth (ht)
(20P & Finer)
Whole Depth (ht)
(Courser than 20P)
Working Depth (h k)
Clearance (c)
Dedendum (b)
Contact Ratio (Mc)
When the number of teeth in a gear is small, the tip of the
mating gear tooth may interfere with the lower portion of the
tooth profile. To prevent this, the generating process removes
material at this point. This results in loss of a portion of the
involute adjacent to the tooth base, reducing tooth contact and
tooth strength.
On 14-1/2°PA gears undercutting occurs where a number of
teeth is less than 32 and for 20°PA less than 18. Since this
condition becomes more severe as tooth numbers decrease,
it is recommended that the minimum number of teeth be 16
for 14-1/2°PA and 13 for 20°PA.
In a similar manner INTERNAL Spur Gear teeth may interfere
when the pinion gear is too near the size of its mating internal
gear. The following may be used as a guide to assure proper
operation of the gear set. For 14-1/2°PA, the difference in
tooth numbers between the gear and pinion should not be
less than 15. For 20°PA the difference in tooth numbers
should not be less than 12.
Having
Formula
Circular Pitch (p)
Pitch Diameter (D)
An increase or decrease in center distance will cause an
increase or decrease in backlash.
Since, in practice, some deviation from the theoretical
standard center distance is inevitable and will alter the
backlash, such deviation should be as small as possible. For
most applications, it would be acceptable to limit the
deviation to an increase over the nominal center distance of
one half the average backlash. Varying the center distance
may afford a practical means of varying the backlash to a
limited extent.
The approximate relationship between center distance and
backlash change of 14-1/2° and 20° pressure angle gears is
shown below:
I
To Obtain
P = 3.1416
p
Number of Teeth (N) & P = N
Pitch Diameter (D)
D
Number of Teeth (N) & P = N + 2 (Approx.)
Outside Diameter (Do)
Do
Diametral Pitch (P)
p = 3.1416
P
Number of Teeth (N) & D = N
Diametral Pitch (P)
P
Outside Diameter (Do) & D = D – 2
o
Diametral Pitch (P)
P
Pitch Diameter (D) and Db = Dcosø
Pressure Angle (ø)
Diametral Pitch (P) &
N=PxD
Pitch Diameter (D)
Diametral Pitch (P)
t = 1.5708
P
1
Diametral Pitch (P)
a=
P
Pitch Diameter (D) &
Do = D + 2a
Addendum (a)
Diametral Pitch (P)
ht = 2.2 + .002
P
Diametral Pitch (P)
ht = 2.157
P
Addendum (a)
hk = 2(a)
Whole Depth (ht)
c = ht – 2a
Addendum (a)
Whole Depth (ht) &
b = ht – a
Addendum (a)
Outside Radii, Base
Radii, Center Distance
and Pressure Angle+C.P.
2
2
2
2
M-C-= Ro – Rb + ro – rb – Csinø*
p cosø
Root Diameter (Dr)
Center Distance (C)
Pitch Diameter (D)
and Dedendum (b)
Pitch Diameter (D) or
No. of Teeth and Pitch
Dr = D – 2b
C = D1 + D2
2
or N1 + N2
2P
*Ro = Outside Radius, Gear
ro = Outside Radius, Pinion
Rb = Base Circle Radius, Gear
rb = Base Circle Radius, Pinion
p
φ
a
PITCH
LINE
hk h
t
b
t
c
rf
302
Boston Gear 800-825-6544
a
b
c
hk
ht
p
rf
t
φ
= ADDENDUM
= DEDENDUM
= CLEARANCE
= WORKING DEPTH
= WHOLE DEPTH
= CIRCULAR PITCH
= FILLET RADIUS
= CIRCULAR TOOTH THICKNESS
= PRESSURE ANGLE
P-1930-BG
04/10
Engineering Information
Spur Gears
TABLE II–VALUES OF SAFE STATIC STRESS (s)
Lewis Formula (Barth Revision)
Gear failure can occur due to tooth breakage (tooth stress) or
surface failure (surface durability) as a result of fatigue and
wear. Strength is determined in terms of tooth-beam stresses
for static and dynamic conditions, following well established
formula and procedures. Satisfactory results may be obtained
by the use of Barth’s Revision to the Lewis Formula, which
considers beam strength but not wear. The formula is
satisfactory for commercial gears at Pitch Circle velocities of
up to 1500 FPM. It is this formula that is the basis for all Boston
Spur Gear ratings.
METALLIC SPUR GEARS
W= SFY
P
600
600 + V
W = Tooth Load, Lbs. (along the Pitch Line)
S = Safe Material Stress (static) Lbs. per Sq. In. (Table II)
F = Face Width, In.
Y = Tooth Form Factor (Table I)
P = Diametral Pitch
D = Pitch Diameter
V = Pitch Line Velocity, Ft. per Min. = .262 x D x RPM
For NON-METALLIC GEARS, the modified Lewis Formula
shown below may be used with (S) values of 6000 PSI for
Phenolic Laminated material.
W= SFY
P
Material
(s) Lb. per Sq. In.
Plastic ........................................................................
5000
Bronze ........................................................................ 10000
Cast Iron ..................................................................... 12000
.20 Carbon (Untreated) ................................... 20000
.20 Carbon (Case-hardened) .......................... 25000
Steel .40 Carbon (Untreated) ................................... 25000
.40 Carbon (Heat-treated)............................... 30000
.40 C. Alloy (Heat-treated) .............................. 40000
{
Max. allowable torque (T) that should be imposed on a gear
will be the safe tooth load (W) multiplied by D or T = W x D
2
2
The safe horsepower capacity of the gear (at a given RPM) can
be calculated from HP = T x RPM or directly from (W) and (V);
63,025
WV
HP =
33,000
For a known HP, T = 63025 x HP
RPM
150
+ .25
200 + V
TABLE I TOOTH FORM FACTOR (Y)
P-1930-BG
04/10
Number of Teeth
14-1/2° Full
Depth Involute
20° Full
Depth Involute
10
11
12
13
14
15
16
17
18
19
20
22
24
26
28
30
32
34
36
38
40
45
50
55
60
65
70
75
80
90
100
150
200
300
Rack
0.176
0.192
0.210
0.223
0.236
0.245
0.255
0.264
0.270
0.277
0.283
0.292
0.302
0.308
0.314
0.318
0.322
0.325
0.329
0.332
0.336
0.340
0.346
0.352
0.355
0.358
0.360
0.361
0.363
0.366
0.368
0.375
0.378
0.382
0.390
0.201
0.226
0.245
0.264
0.276
0.289
0.295
0.302
0.308
0.314
0.320
0.330
0.337
0.344
0.352
0.358
0.364
0.370
0.377
0.383
0.389
0.399
0.408
0.415
0.421
0.425
0.429
0.433
0.436
0.442
0.446
0.458
0.463
0.471
0.484
I
Boston Gear 800-825-6544
303
Engineering Information
Helical Gears
Gear Nomenclature
Helix Angle—
The information contained in the Spur Gear section is also
pertinent to Helical Gears with the addition of the following:
HELIX ANGLE (ψ) is the angle between any helix and an
element of its cylinder. In helical gears, it is at the pitch
diameter unless otherwise specified.
LEAD (L) is the axial advance of a helix for one complete turn,
as in the threads of cylindrical worms and teeth of helical
gears.
NORMAL DIAMETRAL PITCH (Pn) is the Diametral Pitch as
calculated in the normal plane.
HAND – Helical Gears of the same hand operate at right
angles, see Fig. 1
Helical Gears of opposite hands run on parallel
shafts. Fig. 2
NORMAL
PLANE
HELIX
ANGLE
AXIAL PLANE
pn
Ψ
p
p = AXIAL CIRCULAR PITCH
pn = NORMAL CIRCULAR PITCH
TWO
RIGHT-HAND
HELICAL GEARS
TWO
LEFT-HAND
HELICAL GEARS
Figure 1
LEFT HAND HELICAL GEAR
LEFT-HAND AND
RIGHT-HAND
HELICAL GEARS
Figure 2
RIGHT HAND HELICAL GEAR
I
All Boston Helicals are cut to the Diametral Pitch system,
resulting in a Normal Pitch which is lower in number than the
Diametral Pitch.
INVOLUTE—The Helical tooth form is involute in the plane of
rotation and can be developed in a manner similar to that of
the Spur Gear. However, unlike the Spur Gear, which may be
viewed as two-dimensional, the Helical Gear must be viewed
as three-dimensional to show change in axial features.
Helical gears offer additional benefits relative to Spur Gears,
those being:
• Improved tooth strength due to the elongated helical wraparound.
• Increased contact ratio due to the axial tooth overlap.
• Helical Gears thus tend to have greater load carrying
capacity than Spur Gears of similar size.
• Due to the above, smoother operating characteristics are
apparent.
The teeth of a LEFT HAND
Helical Gear lean to the left
when the gear is placed flat on
a horizontal surface.
304
The teeth of a RIGHT HAND
Helical Gear lean to the right
when the gear is placed flat on
a horizontal surface.
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Helical Gears
Helical Gear Formulas
To Obtain
Having
Transverse
Diametral Pitch (P)
Pitch Diameter (D)
Normal
Diametral Pitch (PN)
Normal Circular
Tooth Thickness (τ)
Transverse
Circular Pitch (pt)
Normal
Circular Pitch (pn)
Lead (L)
Helical Gear Lewis Formula
Formula
Number of Teeth (N) &
Pitch Diameter (D)
Normal Diametral Pitch (Pn)
Helix Angle (ψ)
Number of Teeth (N) &
Transverse Diametral Pitch (P)
Transverse Diametral Pitch (P)
& Helix Angle (ψ)
Normal Diametral Pitch (PN)
Diametral Pitch (P)
(Transverse)
Transverse
Circular Pitch (p)
Pitch Diameter and
Pitch Helix Angle
P=N
D
The beam strength of Helical Gears operating on parallel shafts
can be calculated with the Lewis Formula revised to
compensate for the difference between Spur and Helical
Gears, with modified Tooth Form Factors Y.
P = PNCosψ
D=N
P
P
Cosψ
τ = 1.5708
PN
p =π
t P
PN =
pn= ptCosψ
L = πD
Tanψ
Transverse Vs. Normal Diametral Pitch for Boston
45° Helical Gears
P
Transverse
Diametral Pitch
PN
Normal
Diametral Pitch
24
20
16
12
10
8
6
33.94
28.28
22.63
16.97
14.14
11.31
8.48
W= SFY
PN
600
600 + V
W =Tooth Load, Lbs. (along the Pitch Line)
S =Safe Material Stress (static) Lbs. per Sq. In. (Table III)
F =Face Width, Inches
Y =Tooth Form Factor (Table IV)
PN =Normal Diametral Pitch
(Refer to Conversion Chart)
D =Pitch Diameter
V =Pitch Line Velocity, Ft. Per Min. = .262 x D x RPM
Table III–Values of Safe Static Stress (s)
Material
(s) Lb. per Sq. In.
Bronze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10000
Cast Iron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12000
.20 Carbon (Untreated) . . . . . . . . . . . . . . . .
20000
.20 Carbon (Case-hardened) . . . . . . . . . . .
25000
Steel .40 Carbon (Untreated) . . . . . . . . . . . . . . . .
25000
.40 Carbon (Heat-treated) . . . . . . . . . . . . . .
30000
.40 C. Alloy (Heat-treated) . . . . . . . . . . . . . .
40000
{
Table IV—Values of Tooth Form Factor (Y)
No. of
Teeth
8
9
10
12
15
16
18
20
24
FOR 14-1/2°PA—45° HELIX ANGLE GEAR
Factor
No. of
Factor
Y
Teeth
Y
.295
25
.361
.305
30
.364
.314
32
.365
.327
36
.367
.339
40
.370
.342
48
.372
.345
50
.373
.352
60
.374
.358
72
.377
I
Horsepower and Torque
Max. allowable torque (T) that should be imposed on a gear
will be the safe tooth load (W) multiplied by D or T = W x D
2
2
The safe horsepower capacity of the gear (at a given RPM) can
be calculated from HP = T x RPM or directly from (W) and (V);
63,025
HP = WV
33,000
For a known HP, T = 63025 x HP
RPM
P-1930-BG
04/10
Boston Gear 800-825-6544
305
Engineering Information
Helical Gears
When Helical gears are operated on other than Parallel shafts,
the tooth load is concentrated at a point, with the result that
very small loads produce very high pressures. The sliding
velocity is usually quite high and, combined with the
concentrated pressure, may cause galling or excessive wear,
especially if the teeth are not well lubricated. For these
reasons, the tooth load which may be applied to such drives
is very limited and of uncertain value, and is perhaps best
determined by trial under actual operating conditions. If one
of the gears is made of bronze, the contact area and thereby
the load carrying capacity, may be increased, by allowing the
gears to “run-in” in their operating position, under loads
which gradually increase to the maximum expected.
Thrust Loads
As a result of the design of the Helical Gear tooth, an axial or
thrust load is developed. Bearings must be adequate to
absorb this load. The thrust load direction is indicated below.
The magnitude of the thrust load is based on calculated
Horsepower.
126,050 x HP
Axial Thrust Load =
RPM x Pitch Diameter
Boston Helicals are all 45° Helix Angle, producing a tangential
force equal in magnitude to the axial thrust load. A separating
force is also imposed on the gear set based on calculated
Horsepower.
Separating Load = Axial Thrust Load x .386
Above formulae based on Boston 45° Helix Angle and
14-1/2° Normal Pressure Angle.
RIGHT
HAND
DRIVER
THRUST
BEARING
DRIVER
LEFTHAND
DRIVER
THRUST
BEARING
DRIVER
I
LEFT-HAND
DRIVER
DRIVER
THRUST
BEARING
RIGHT-HAND
See page 118 for hardened and ground Thrust Washers.
306
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Miter and Bevel Gears
Gear geometry for both straight and spiral tooth Miter and
Bevel gears is of a complex nature and this text will not
attempt to cover the topic in depth.
Similar in nature to Helical gearing, Spiral Miters and Bevels
must be run with a mating pinion or gear of opposite hand.
The basic tooth form is a modification to the involute form
and is the common form used in production today. All Boston
standard stock Miter and Bevel gears are manufactured with
a 20° Pressure Angle. Bevel gears are made in accordance
with A.G.M.A. specifications for long and short Addendum
system for gears and pinions (pinion is cut long Addendum)
which serves to reduce the amount of pinion tooth undercut
and to nearly equalize the strength and durability of the gear
set.
Nomenclature
Nomenclature may best be understood by means of graphic
representation depicted below:
The teeth of a Left Hand
gear lean to the left when
the gear is placed on a
horizontal surface.
The teeth of a Right Hand
gear lean to the right when
the gear is placed flat on a
horizontal surface.
MOUNTING DISTANCE
PITCH APEX
TO CROWN
NE
DI
FACE
ANGLE
All Boston Spiral Miter and Bevel gears are made with 35°
spiral angles with all pinions cut left hand.
Straight Tooth Miter and Bevel Gear Formulas
PITCH
ST
CO
CROWN
TO BACK
Formula
APEX
ROOT
ANGLE
CE
FA
PITCH
ANGLE
ADDENDUM
DEDENDUM
WHOLE DEPTH
To Obtain
Having
Pitch
Diameter (D,d)
Whole
Depth (hT)
No. of Teeth and
Diametral Pitch (P)
d=n
P
Diametral Pitch (P)
hT =
Addendum (a)
Diametral Pitch (P)
Dedendum (b)
PITCH DIA.
ST
Clearance
BA
CK
CO
NE
DI
O.D.
Circular Tooth
Thickness (τ)
Pitch Angle
Outside
Diameter
(Do, do)
Pinion
Whole Depth (hT) &
Addendum (a)
Whole Depth (nT) &
Addendum (a)
Diametral Pitch (P)
Number of Teeth In
Pinion (Np) and
Gear (NG)
Pinion & Gear Pitch
Diameter (Dp + DG)
Addendum (a) &
Pitch Angle (Lp + LG)
Gear
D=n
P
2.188
2.188
+ .002 hT =
+ .002
P
P
1
1
a=
a=
P
P
b = hT – a
b = hT – a
c = hT – 2a
c = hT – 2a
τ=
1.5708
P
( )
Lp = tan -1 Np
NG
τ=
1.5708
P
I
LG = 90 – Lp
do=Dp+2a(cos Lp) Do=DG+2a(cos LG)
Stock gears are cut to operate on an exact Mounting
Distance with the following average backlash:
Diametral Pitch
Backlash (Inches)
4
5
6
8
10
12-20
24-48
.008
.007
.006
.005
.004
.003
.002
P-1930-BG
04/10
Boston Gear 800-825-6544
307
Engineering Information
Miter and Bevel Gears
Straight tooth bevel (and miter) gears are cut with generated
tooth form having a localized lengthwise tooth bearing known
as the “Coniflex”® tooth form. The superiority of these gears
over straight bevels with full length tooth bearing, lies in the
control of tooth contact. The localization of contact permits
minor adjustment of the gears in assembly and allows for
some displacement due to deflection under operating loads,
without concentration of the load on the end of the tooth. This
results in increased life and quieter operation.
Incorrect
If Mounting Distance of one or both gears is made less than
dimension specified, the teeth may bind. Excessive wear or
breakage can result. Drawing below shows gears mounted
incorrectly with the Mounting Distance too short for one gear.
PINION APEX DEFLECTED
OR ASSEMBLED OFF
CENTER
PINION APEX
ON CENTER
MOUNTING
DISTANCE
TOO SMALL
TOOTH BEARING SHIFTED
OFF CENTER
BUT STILL SAFE
TOOTH BEARING CENTRAL
(A)
Incorrect
(B)
ILLUSTRATION OF LOCALIZED TOOTH BEARING
IN STRAIGHT BEVEL CONIFLEX® GEARS
Boston Gear Bevel and Miter Gears will provide smooth, quiet
operation and long life when properly mounted and
lubricated. There are several important considerations in
mounting these gears.
If Mounting Distance of either gear is made longer than
dimension specified, as shown in drawing below, the gears
will not be in full mesh on a common pitch line and may have
excessive backlash. Excessive backlash or play, if great
enough, can cause a sudden impulse or shock load in
starting or reversing which might cause serious tooth
damage.
1. All standard stock bevel and miter gears must be mounted
at right angles (90°) for proper tooth bearing.
I
2. Mounting Distance (MD) is the distance from the end of
the hub of one gear to the center line of its mating gear.
When mounted at the MD specified, the gears will have a
proper backlash and the ends of the gear teeth will be
flush with each other (see drawings).
3. All bevel and miter gears develop radial and axial thrust
loads when transmitting power. See page 309. These
loads must be accommodated by the use of bearings.
MOUNTING
DISTANCE
MOUNTING
DISTANCE
TOO GREAT
MOUNTING
DISTANCE
MOUNTING
DISTANCE
MOUNTING
DISTANCE
®Registered in the U.S. Patent Office.
308
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Miter and Bevel Bears
Tooth Strength (Straight Tooth)
The beam strength of Miter and Bevel gears (straight tooth)
may be calculated using the Lewis Formula revised to
compensate for the differences between Spur and Bevel gears.
Several factors are often combined to make allowance for the
tooth taper and the normal overhung mounting of Bevel gears.
W= SFY
P
W=
S =
F =
Y =
P =
D =
V =
600
600 + V
Thrust
The axial thrust loads developed by straight tooth miter and
bevel gears always tend to separate the gears.
.75
Tooth Load, Lbs. (along the Pitch Line)
Safe Material Stress (static) Lbs. per Sq. In. (Table 1)
Face Width, In.
Tooth Form Factor (Table I)
Diametral Pitch
Pitch Diameter
Pitch Line Velocity, Ft. per Min. = .262 x D x RPM
For Spiral Bevel and Miter Gears, the direction of axial thrust
loads developed by the driven gears will depend upon the
hand and direction of rotation. Stock Spiral Bevel pinions cut
Left Hand only, Gears Right Hand only.
TABLE I VALUES OF SAFE STATIC STRESS (s)
Material
(s) Lb. per Sq. In.
Plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5000
Bronze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10000
Cast Iron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12000
.20 Carbon (Untreated) . . . . . . . . . . . . . . . . . . . . . . 20000
.20 Carbon (Case-hardened) . . . . . . . . . . . . . . . . . . 25000
Steel .40 Carbon (Untreated) . . . . . . . . . . . . . . . . . . . . . . 25000
.40 Carbon (Heat-treated) . . . . . . . . . . . . . . . . . . . . 30000
.40 C. Alloy (Heat-treated) . . . . . . . . . . . . . . . . . . . . 40000
{
TABLE II TOOTH FORM FACTOR (Y)
20°P.A.—LONG ADDENDUM PINIONS SHORT ADDENDUM GEARS
No.
Ratio
Teeth
1
1.5
2
3
4
6
Pinion Pin. Gear Pin. Gear Pin. Gear Pin. Gear Pin. Gear Pin. Gear
12
14
16
18
20
24
28
32
36
40
—
—
.333
.342
.352
.371
.386
.399
.408
.418
—
.349
.367
.383
.402
.424
.446
.462
.477
—
—
.292
.311
.328
.339
.364
.383
.396
.408
—
.345
.367
.386
.402
.418
.443
.462
.487
.518
.543
.283
.301
.320
.336
.349
.368
.386
.402
.415
.424
.355
.377
.396
.415
.427
.471
.509
.540
.569
.594
.302
.317
.333
.346
.355
.377
.396
.412
.424
.434
.358
.380
.402
.427
.456
.506
.543
—
—
—
.305
.323
.339
.364
.386
.405
.421
—
—
—
.361
.405
.443
.474
.500
—
—
—
—
—
.324
.352
.377
.399
.421
—
—
—
—
—
Horsepower and Torque
Max. allowable torque (T) that should be imposed on a gear
will be the safe tooth load (W) multiplied by D or T = W x D
2
2
The safe horsepower capacity of the gear (at a given RPM) can
be calculated from HP = T x RPM or directly from (W) and (V);
63,025
WV
HP =
33,000
For a known HP, T = 63025 x HP
RPM
The magnitude of the thrust may be calculated from the
formulae below, based on calculated HP, and an appropriate
Thrust Bearing selected.
Straight Bevels and Miters
Gear Thrust =
126,050 x HP
x tan α cos β
RPM x Pitch Diameter
Pinion Thrust =
126,050 x HP
x tan α sin β
RPM x Pitch Diameter
Spiral Bevels and Miters
I
Thrust values for Pinions and Gears are given for four
possible combinations.
R.H. SPIRAL
CLOCKWISE
L.H. SPIRAL
TP = 126,050 x HP
tanα sinβ
– tanγ cosβ
cosγ
TG = 126,050 x HP
tanα cosβ
+ tanγ sinβ
cosγ
TP = 126,050 x HP
tanα sinβ
+ tanγ cosβ
cosγ
TG = 126,050 x HP
tanα cosβ
+ tanγ sinβ
cosγ
RPM x D
RPM x D
C. CLOCKWISE
L.H. SPIRAL
CLOCKWISE
R.H. SPIRAL
RPM x D
RPM x D
C. CLOCKWISE
α = Tooth Pressure Angle
β = 1/2 Pitch Angle
NP
Pitch Angle = tan-1 N
G
γ = Spiral Angle = 35°
( )
P-1930-BG
04/10
Boston Gear 800-825-6544
309
Engineering Information
Worms and Worm Gears
Boston standard stock Worms and Worm Gears are used for
the transmission of motion and/or power between nonintersecting shafts at right angles (90°). Worm Gear drives are
considered the smoothest and quietest form of gearing when
properly applied and maintained. They should be considered
for the following requirements:
HIGH RATIO SPEED REDUCTION
LIMITED SPACE
RIGHT ANGLE (NON-INTERSECTING) SHAFTS
GOOD RESISTANCE TO BACK DRIVING
General nomenclature having been applied to Spur and
Helical gear types, may also be applied to Worm Gearing with
the addition of Worm Lead and Lead Angle, Number of
Threads (starts) and Worm Gear Throat diameter.
Thrust Loads
As is true with Helical and Bevel gearing, Worm gearing,
when operating, produces Thrust loading. The Chart below
indicates the direction of thrust of Worms and Worm Gears
when they are rotated as shown. To absorb this thrust
loading, bearings should be located as indicated.
RIGHT-HAND
DRIVEN
DRIVEN
DRIVER
DRIVER
THRUST BEARING
HOW TO TELL A LEFT-HAND
OR RIGHT-HAND
WORM OR WORM GEAR
DRIVEN
DRIVEN
LEFT-HAND
DRIVEN
DRIVER
DRIVEN
DRIVER
THRUST BEARING
DRIVEN
DRIVEN
Threads of LEFT-HAND lean to the
Left when standing on either end:
I
Efficiency
The efficiency of a worm gear drive depends on the lead
angle of the worm. The angle decreases with increasing ratio
and worm pitch diameter. For maximum efficiency the ratio
should be kept low.
Due to the sliding action which occurs at the mesh of the
Worm and Gear, the efficiency is dependent on the Lead
Angle and the Coefficient of the contacting surface. A
common formula for estimating efficiency of a given Worm
Gear reduction is:
EFFICIENCY = E = Tanγ (1 – f tanγ)
f + tanγ
Threads of RIGHT-HAND lean to the
Right when standing on either end:
where γ = Worm Lead Angle
f = Coefficient of Friction
For a Bronze Worm Gear and hardened Steel Worm, a
Coefficient of Friction in the range of .03/.05 may be assumed
for estimated value only.
310
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Worms and Worm Gears
Worm and Worm Gear Formulas
To Obtain
Worm Gear Back-Driving
Having
Formula
p = 3.1416
P
P = 3.1416
p
Circular Pitch (p)
Diametral Pitch (P)
Diametral Pitch (P)
Circular Pitch (p)
Lead (of Worm) (L)
Number of Threads in
Worm & Circular Pitch (p)
L = p(No. of Threads)
Addendum (a)
Diametral Pitch (P)
a=1
P
Pitch Diameter (D)
of Worm (DW)
Pitch Diameter of
Worm Gear (DG)
Center Distance
Between Worm &
Worm Gear (CD)
Outside Diameter (d o) &
Addendum (a)
Circular Pitch (p) &
Number of Teeth (N)
Pitch Diameter
of Worm (d w) &
Worm Gear (DG)
Circular Pitch (p)
DW = do – 2a
Diametral Pitch (P)
hT = 2.157
P
Whole Depth (h T) &
Outside Diameter (d w)
Pitch Diameter of Worm
Gear (D) & Addendum (a)
Pitch Diameter of Worm(D)
& The Lead (L)
No. of Teeth on Gear (NG)
and Number of
Threads on Worm
Throat Dia. (DT)
and Addendum (a)
dr = do – 2hT
Whole Depth of
Teeth (hT)
Bottom Diameter
of Worm (Dr)
Throat Diameter
of Worm Gear (DT)
Lead Angle of
Worm (γ)
Ratio
Gear O.D. (DO)
DG =
This is the converse of self-locking and refers to the ability of
the worm gear to drive the worm. The same variables exist,
making it difficult to predict. However, our experience
indicates that for a hardened worm and bronze gear properly
manufactured, mounted and lubricated, back-driving
capability may be expected, if the lead angle is greater than
11°. Again, no guarantee is made and the customer should
be so advised.
Rating
The high rate of sliding friction that takes place at the mesh of
the Worm and Gear results in a more complex method of
rating these Gears as opposed to the other Gear types.
Material factors, friction factors and velocity factors must all
be considered and applied to reflect a realistic durability
rating.
NGp
3.1416
CD = dw + DG
2
hT = .6866 p
DT = DG + 2a
L
γ = tan-1 3.1416d
NG
Ratio =
No. of Threads
(
)
DO = DT + .6a
Self-Locking Ability
There is often some confusion as to the self-locking ability of
a worm and gear set. Boston worm gear sets, under no
condition should be considered to hold a load when at rest.
The statement is made to cover the broad spectrum of
variables effecting self-locking characteristics of a particular
gear set in a specific application. Theoretically, a worm gear
will not back drive if the friction angle is greater than the
worm lead angle. However, the actual surface finish and
lubrication may reduce this significantly. More important,
vibration may cause motion at the point of mesh with further
reduction in the friction angle.
I
Generally speaking, if the worm lead angle is less than 5°,
there is reasonable expectation of self-locking. Again, no
guarantee should be made and customer should be advised.
If safety is involved, a positive brake should be used.
P-1930-BG
04/10
Boston Gear 800-825-6544
311
Engineering Information
Couplings
Universal Joints
Alignment
Alignment of Boston couplings should be performed by the
following steps to meet lateral and angular misalignment
specifications below.
1. Align shafts and supports to give minimum lateral and
angular misalignment.
2. Assemble coupling halves to shaft.
3. Slide couplings together and check lateral misalignment
using straight edge and feeler gauge over coupling outside
diameter. (On BF Series couplings, spider must be
removed.) This should be within specifications below.
4. Lock couplings on shaft and check distance using feeler
gauges between drive lug on one half and space between
on other coupling half. Rotate coupling and check gap at a
minimum of 3 other coupling positions. The difference
between any two readings should be within specifications
below.
FEELER GAUGE
FEELER GAUGE
The detrimental effects of these rotational deviations can be
reduced, and uniform speed restored by using two joints (and
an intermediate shaft) to connect shafts at an angle or
misaligned in a parallel direction.
For connecting shafts in the same plane the joints should be
arranged to operate at equal angles and with the bearing pins
of the yokes on the intermediate shaft in line with each other.
Lubrication
LATERAL MISALIGNMENT
ANGULAR MISALIGNMENT
PIN and BLOCK TYPE
These universal joints are not lubricated when shipped.
MISALIGNMENT TOLERANCES
Coupling
Series
FC–Bronze Insert
FC–Urethane Insert
FC–Rubber Insert
BF
BG (Shear Type)
FA
FCP (Plastic)
I
Lateral
Angular
.001
.002
.002
.002
1/32
.002
.003
See Chart
below
1-1/2°
2°
2°
3°
FC Series ANGULAR MISALIGNMENT
Chart reflects maximum angular misalignment of 1-1/2° for
rubber, 1° for urethane and 1/2° for bronze.
MAXIMUM READING DIFFERENTIAL
Size
Rubber
Insert
Urethane
Bronze
FC12
FC15
FC20
FC25
FC30
FC38
FC45
.033
.039
.053
.066
.078
.097
.117
.022
.026
.035
.044
.052
.065
.078
.011
.013
.018
.022
.026
.032
.039
Mounting
A single universal joint (rotating at uniform speed) operating at
an angle will introduce periodic variations of angular velocity to
the driven shaft. These cyclic speed fluctuations (two per
revolution) cause vibration, higher shaft stresses and bearing
loads which will be more severe with larger angles of
operation.
312
Boston Gear 800-825-6544
Many applications are considered severe when in harsh
environments and when a combination of speed, dirt
contamination and inaccessible locations make it impractical
to maintain proper lubrication.
It is in these instances when the Boot Kits become a desirable
alternative. For satisfactory performance, all booted joints
should be used with a LITH-EP-000 grease for an ambient
temperature range of 40° to 225°F.
VOLUME OF LUBRICATION FOR BOOTED JOINTS
Size
37
50
62
75
87
Volume
(Ozs.)
.4
.5
.75
1.0
1.5
Size
100
125
150
175
200
Volume
(Ozs.)
2.0
3.5
4.5
7.0
15.0
Size
250
300
400
Volume
(Ozs.)
25.0
30.0
50.1
NOTE: Joints should be initially lubricated with a 90 weight oil before being
packed with grease.
FORGED AND CAST TYPE
Universal joints are not lubricated when shipped.
Lubricate these joints with a Lith EP-2 grease or equivalent.
The center cross of these joints holds a generous supply of
lubricant which is fed to the bearings by centrifugal action.
Light-duty, low-angle operation may require only occasional
lubrication. For high-angle, high-speed operation or in
extreme dirt or moist conditions, daily regreasing may be
required.
P-1930-BG
04/10
Engineering Information
HOW TO FIGURE HORSEPOWER AND TORQUE
To Obtain
Having
Velocity (V)
Feet Per Minute
STANDARD KEYWAYS & SETSCREW
Formula
Velocity (V) Ft. Per Min.
V
Rev. per Min. (RPM) & Pitch Diameter (D) of
RMP =
.268
xD
Gear or Sprocket – Inches
Pitch Diameter (D)
of Gear or Sprocket
– Inches
Velocity (V) Ft. Per
Min & Rev. Per Min.
(RPM)
Torque (T) In. Lbs.
Force (W) Lbs. &
Radius (R) Inches
T=WxR
Horsepower (HP)
Force (W) Lbs. &
Velocity (V) Ft. Per Min.
HP = W X V
33000
Horsepower (HP)
Torque (T) In Lbs. &
Rev. per Min. (RPM)
HP =
Torque (T) In. Lbs.
Horsepower (HP) &
Rev. Per Min. (RPM)
63025 x HP
T=
RPM
D=
Diam. of Hole
W
D
Recommended
Setscrew
5/16 to 7/16”
1/2 to 9/16
5/8 to 7/8
15/16 to 1-1/4
1-5/16 to 1-3/8
1-7/16 to 1-3/4
1-13/16 to2-1/4
2-5/16 to 20-3/4
2-13/16 to 3-1/4
3-5/16 to 3-3/4
3-13/16 to 4-1/2
4-9/16 to 5-1/2
5-9/16 to 6-1/2
3/32”
1/8
3/16
1/4
5/16
3/8
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
3/64”
1/16
3/32
1/8
5/32
3/16
1/4
5/16
3/8
7/16
1/2
7/16
1/2
10–32
1/4–20
5/16–18
3/8–16
7/16–14
1/2–13
9/16–12
5/8–11
3/4–10
7/8–9
1–8
1-1/8–7
1-1/4–6
Standard Keyway
Pitch Diameter (D) of
Gear or sprocket – Inches V = 2618 x D x RPM
& Rev. Per Min. (RPM)
V
.2618 x RPM
T x TPM
63025
FORMULA:
W
d
Force (W) Lbs.
Horsepower (HP) &
Velocity (V) Ft. Per Min.
X
X' = 2X – D
X'
DIA. OF HOLE
OR D
33000 x HP
W=
V
EXAMPLE:
Hole 1"; Keyway 1/4" wide by 1/8" deep.
X' = 2.218 – 1.000 = 1.218"
Rev. Per Min. (RPM) Horsepower (HP) &
Torque (TP) In. Lbs.
P
RPM = 63025 x H
T
POWER is the rate of doing work.
WORK is the exerting of a FORCE through a DISTANCE. ONE
FOOT POUND is a unit of WORK. It is the WORK done in exerting
a FORCE OF ONE POUND through a DISTANCE of ONE FOOT.
THE AMOUNT OF WORK done (Foot Pounds) is the FORCE
(Pounds) exerted multiplied by the DISTANCE(Feet) through
which the FORCE acts.
ILLUSTRATION OF HORSEPOWER
FORCE (W)
*33,000 lbs.
FORCE (W)
1000 lbs.
33000
lbs.
1000
lbs.
DISTANCE = 33FT.
TIME = 1 MIN.
DISTANCE = 1FT.
TIME = 1 MIN.
TORQUE (T) is the product of a FORCE (W) in pounds,
times a RADIUS (R) in inches from the center of shaft
(Lever Arm) and is expressed in Inch Pounds.
R=1*
R=2*
THE AMOUNT OF POWER used (Foot Pounds per Minute( is the
WORK (Foot Pounds) done divided by the TIME (Minutes)
required.
POWER (Foot Pounds per Minute) = WORK (Ft. Lbs.)
TIME (Minutes)
POWER is usually expressed in terms of HORSEPOWER.
HORSEPOWER is POWER (Foot Pounds per Minute) divided by
33,000.
HORSEPOWER (HP)
POWER (Ft. Lbs. per Minute)
=
33,000
WORK (Ft. Pounds)
33,000 x TIME (Min.)
FORCE (Lbs.) x DISTANCE (Feet)
=
33,000 x TIME (Min.)
=
HORSEPOWER (HP)
FORCE (Lbs.) x DISTANCE (Feet)
=
33,000 x TIME (Min.)
PP-1930-BG
02/10
I
W 300*
W 150*
T=WR=300 x 1=300 In. Lbs.
Lbs.
T=WR=150 x 2=300 In.
If the shaft is revolved, the FORCE (W) is moved through a
distance, and WORK is done.
2πR
WORK (Ft. Pounds ) = W x
x No. of Rev. of Shaft.
12
When this WORK is done in a specified TIME, POWER is
used.
2πR
POWER (Ft. Pounds per Min.) = W x
x RPM
12
Since (1) HORSEPOWER = 33,000 Foot Pounds per
minute
2ΠR RPM
W X R X RPM
HORSEPOWER (HP) = W x
x
=
12
33,000
63,025
but TORQUE (Inch Pounds) = FORCE (W) x RADIUS (R)
TORQUE (T) x (RPM
Therefore HORSEPOWER (HP) =
63,025
Boston Gear 800-825-6544
313
Engineering Information
General
Mounting
Alterations
SPUR & HELICAL
Boston Gear Service Centers are equipped to alter catalog
sprockets (rebore, keyway, setscrew, etc.). For customers,
choosing to make their own alterations, the guidelines listed
below should be beneficial. Alterations to hardened gears
should not be made without consultation with factory.
In setting up for reboring the most important consideration is
to preserve the accuracy of concentricity and lateral runout
provided in the original product. There are several methods
for accomplishing this. One procedure is: mount the part on
an arbor, machine hub diameter to provide a true running
surface, remove from arbor and chuck on the hub diameter,
check face and bore runout prior to reboring. As a basic rule
of thumb, the maximum bore should not exceed 60% of the
Hub Diameter and depending on Key size should be checked
for minimum wall thickness. A minimum of one setscrew
diameter over a keyway is considered adequate.
Boston Gear offers a service for hardening stock sprockets.
This added treatment can provide increased horsepower
capacity with resultant longer life and/or reduction in size and
weight.
Customers wishing to do the hardening operation should
refer to “Materials” below for information.
For proper functioning gears, gears must be accurately
aligned and supported by a shaft and bearing system which
maintains alignment under load. Deflection should not exceed
.001 inch at the tooth mesh for general applications. The
tolerance on Center Distance normally should be positive to
avoid possibility of gear teeth binding. Tolerance value is
dependent on acceptable system backlash. As a guide for
average application, this tolerance might vary from .002 for
Boston Gear’s fine pitch gears to .005 for the coarsest pitch.
WORMS AND WORM GEAR
It is important that the mounting assures the central plane of
the Worm gear passes essentially through the axis of the
Worm. This can be accomplished by adjusting the Worm
Gear axially. Boston Worm Gears are cut to close tolerancing
of the Center Line of the Gear tooth to the flush side of the
Gear. When properly mounted Worm Gears will become more
efficient after initial break-in period.
HOW WORM GEARS “ADJUST” THEMSELVES
The gear in a worm gear reducer is made of a soft bronze
material. Therefore, it can cold-work and wear-in to
accommodate slight errors in misalignment.
Evolution of Contact in a Worm Gear
Worm
rotation
Entering
side
Leaving
side
Initially, contact is
concentrated on the leaving
side of the worm.
I
After several hours or
running under load, gear
has cold-worked to spread
area of contact.
Lubrication
The use of a straight mineral oil is recommended for most
worm gear applications. This type of oil is applicable to gears
of all materials, including non-metallic materials.
Mild E.P. (Extreme Pressure) lubricants may be used with Iron
and Steel Gears. E.P. lubricants normally should be selected
of the same viscosity as straight mineral oil, E.P. lubricants
are not recommended for use with brass or bronze gears.
SAE80 or 90 gear oil should be satisfactory for splash
lubricated gears. Where extremely high or low speed
conditions are encountered, consult a lubricant manufacturer.
Oil temperature of 150°F should not be exceeded for
continuous duty applications. Temperatures up to 200°F can
be safely tolerated for short periods of time.
Many specialty lubricants have been recently developed to
meet the application demands of today’s markets, including
synthetics and both high and low temperature oils and
greases. In those instances where Bath or Drip Feed is not
practical, a moly-Disulphide grease may be used
successfully, for low speed applications.
After many hours of
operation, contact has
spread to cover the entire
working area of the tooth.
314
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
General
Materials
Styles
Boston Gear stock steel gears are made from a .20 carbon
steel with no subsequent treatment. For those applications
requiring increased wearability. Case-hardening produces a
wear resistant, durable surface and a higher strength core.
Carburizing and hardening is the most common process
used. Several proprietary nitriding processes are available for
producing an essentially distortion-free part with a relatively
shallow but wear-resistant case. Boston stock worms are
made of either a .20 or .45 carbon steel. Selection of material
is based on size and whether furnished as hardened or
untreated.
Boston Spur, Helical, and Worm Gears are carried in Plain,
Web, or Spoke styles, as illustrated.
Stock cast iron gears are manufactured from ASTM-CLASS
30 cast iron to Boston Gear specifications. This provides a
fine-grained material with good wear-resistant properties.
PLAIN – A
Bronze worm and helical gears are produced from several
alloys selected for bearing and strength properties. Phosphor
bronze is used for helicals and some worm gears (12P and
coarser). Finer pitch worm gears are made from several
different grades of bronze, dependent on size.
Non-metallic spur Gears listed in this Catalog are made from
cotton reinforced phenolic normally referred to as Grade “C.”
Plastic Gears listed are molded from either Delrin®, Acetal or
Minlon®.
WEB – B
STANDARD KEYWAYS AND SETSCREWS
Diameter of Hole
W
Standard
d
Recommended
Setscrew
5/16 to 7/16”
1/2 to 9/16
5/8 to 7/8
15/16 to 1-1/4
1-5/16 to 1-3/8
1-7/16 to 1-3/4
1-13/16 to 2-1/4
2-5/16 to 2-3/4
2-13/16 to 3-1/4
3-5/16 to 3-3/4
3-13/16 to 4-1/2
4-9/16 to 5-1/2
5-9/16 to 6-1/2
3/32”
1/8
3/16
1/4
5/16
3/8
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
3/64”
1/16
3/32
1/8
5/32
3/16
1/4
5/16
3/8
7/16
1/2
7/16
1/2
10-32
1/4-20
5/16-18
3/8-16
7/16-14
1/2-13
9/16-12
5/8-11
3/4-10
7/8-9
1-8
1-1/8-7
1-1/4-6
I
WEB WITH
LIGHTNING HOLES – C
W
d
X
DIA. OF HOLE
OR D
X'
Formula:
X = (D/2) 2 – (W/2) 2 + d + D/2
SPOKE – D
X’ = 2X – D
Example:
Hole 1”; Keyway 1/4” wide by 1/8” deep.
X = (1/2) 2 – (1/8) 2 + 1/8 + 1/2 = 1.109"
X’ = 2.218 – 1.000 = 1.218”
P-1930-BG
04/10
Boston Gear 800-825-6544
315
Engineering Information
Sprockets
Alterations
Overhung Load
Boston Gear Service Centers are equipped to alter catalog
sprockets (rebore, keyway, setscrew, etc.). For customers,
choosing to make their own alterations, the guidelines listed
below should be beneficial. Alterations to hardened gears
should not be made without consultation with factory.
In setting up for reboring the most important consideration is
to preserve the accuracy of concentricity and lateral runout
provided in the original product. There are several methods for
accomplishing this. One procedure is: mount the part on an
arbor, machine hub diameter to provide a true running
surface, remove from arbor and chuck on the hub diameter,
check face and bore runout prior to reboring. As a basic rule
of thumb, the maximum bore should not exceed 60% of the
Hub Diameter and depending on Key size should be checked
for minimum wall thickness. A minimum of one setscrew
diameter over a keyway is considered adequate.
Boston Gear offers a service for hardening stock sprockets.
This added treatment can provide increased horsepower
capacity with resultant longer life and/or reduction in size and
weight.
Customers wishing to do the hardening operation should refer
to “Materials” below for information.
Overhung load is introduced on a shaft by the sprocket, gear,
or belt from which the shaft is driven. A shaft driven by a
properly installed flexible coupling would not have an
overhung load.
The magnitude of the overhung load is determined by the load
at the driving or driven member and the distance this member
is from the nearest shaft support bearing. Overhung load will
reduce the safe power transmission capacity of any shaft,
therefore, every effort must be made to reduce this load.
There are two ways to reduce this load (1) reduce the support
distance or (2) increase the diameter of the driving and driven
member. In most cases, increasing the size of a drive is not
possible and therefore, all effort should be made to reduce the
support distance.
MINIMUM
DISTANCE
Materials
MAXIMUM
DIAMETER
Plastic
Plastic sprockets listed are molded from Nylatron GS.
Steel
Type B one-piece sprockets are furnished in a free-machining,
low carbon steel.
Plate sprockets (Type A) and two-piece construction (Type B)
are made of low carbon steel (basically AISI 1020).
1/4” pitch (Type B) up to 20 teeth is furnished from sintered
metal powder conforming to ASTM-B-426-70 Grade 1, Type III
with hardness of RB60 MIN.
I
FORMULA:
Stainless Steel
X' = 2X – D
1/4, 3/8 and 1/2” Pitches stock bore, single strand are
furnished from 303 free-machining Stainless Steel.
EXAMPLE:
Cast Iron
Hole 1"; Keyway 1/4" wide by 1/8" deep.
Block Chain Sprockets are furnished in Cast Iron for 9 through
12 teeth, which conforms to ASTM-A48-Class 30 Cast Iron,
providing a fine-grained material with good wear resistant
properties.
X' = 2.218 – 1.000 = 1.218"
W
STANDARD KEYWAYS AND SETSCREWS
Diameter of Hole
5/16 to 7/16 “
1/2 to 9/16
5/8 to 7/8
15/16 to 1-1/4
1-5/16 to 1-3/8
1-7/16 to 1-3/4
1-13/16 to 2-1/4
2-5/16 to 2-3/4
2-13/16 to 3-1/4
3-5/16 to 3-3/4
3-13/16 to 4-1/2
4-9/16 to 5-1/2
5-9/16 to 6-1/2
316
Standard Keyway
W
D
3/32”
3/64”
1/8
1/16
3/16
3/32
1/4
1/8
5/16
5/32
3/8
3/16
1/2
1/4
5/8
5/16
3/4
3/8
7/8
7/16
1
1/2
1-1/4
7/16
1-1/2
1/2
Boston Gear 800-825-6544
Recommended
Setscrew
10–32
1/4–20
5/16–18
3/8–16
7/16–14
1/2–13
9/16–12
5/8–11
3/4–10
7/8–9
1–8
1-1/8–7
1-1/4–6
d
X
X'
DIA. OF HOLE
OR D
P-1930-BG
04/10
Engineering Information
Sprocket Diameters for ANSI Standard Series
Number
of
Teeth
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
30
31
32
33
34
35
36
38
39
40
41
42
44
45
48
52
54
56
60
64
65
66
70
72
80
84
96
P-1930-BG
1/4” Pitch–No. 25
3/8” Pitch–No. 35
1/2” Pitch–No. 40
1/2” Pitch–No. 41
.130” Roller Diameter
.200” Roller Diameter
.312” Roller Diameter
.306” Roller Diameter
Pitch
Outside Bottom
Pitch
Outside Bottom
Pitch
Outside Bottom
Pitch
Outside
Bottom
Diameter Diameter Diameter Diameter Diameter Diameter Diameter Diameter Diameter Diameter Diameter Diameter
0.731
0.809
0.887
0.966
1.045
1.124
1.203
1.282
1.361
1.440
1.519
1.598
1.678
1.757
1.836
1.915
1.995
2.074
2.154
2.233
2.392
2.471
2.551
2.630
2.710
2.789
2.869
3.028
3.107
3.187
3.266
3.346
3.505
3.584
3.823
4.141
4.300
4.459
4.777
5.095
5.175
5.254
5.572
5.732
6.368
6.686
7.641
04/10
0.83
0.91
1.00
1.08
1.16
1.24
1.32
1.40
1.48
1.56
1.64
1.72
1.80
1.88
1.96
2.04
2.12
2.20
2.28
2.36
2.52
2.60
2.68
2.76
2.84
2.92
3.00
3.16
3.24
3.32
3.40
3.48
3.64
3.72
3.96
4.28
4.44
4.60
4.92
5.23
5.31
5.39
5.71
5.87
6.51
6.83
7.78
0.601
0.679
0.757
0.836
0.915
0.994
1.073
1.152
1.231
1.310
1.389
1.468
1.548
1.627
1.706
1.785
1.865
1.944
2.024
2.103
2.262
2.341
2.421
2.500
2.580
2.659
2.739
2.898
2.977
3.693
3.136
3.216
3.375
3.454
3.693
4.011
4.170
4.329
4.647
4.965
5.045
5.124
5.442
5.602
6.238
6.556
7.511
1.096
1.214
1.331
1.449
1.567
1.685
1.804
1.922
2.041
2.160
2.278
2.397
2.516
2.635
2.754
2.873
2.992
3.111
3.230
3.349
3.588
3.707
3.826
3.945
4.064
4.183
4.303
4.541
4.660
5.734
4.899
5.018
5.257
5.736
5.734
6.211
6.449
6.688
7.165
7.643
7.762
7.881
8.358
8.597
9.552
10.029
11.461
1.26
1.38
1.50
1.63
1.75
1.87
1.99
2.11
2.23
2.35
2.47
2.59
2.71
2.83
2.95
3.07
3.19
3.31
3.43
3.55
3.79
3.91
4.03
4.15
4.27
4.39
4.51
4.75
4.87
5.95
5.11
5.23
5.47
5.59
5.95
6.43
6.66
6.90
7.38
7.86
7.98
8.10
8.58
8.81
9.77
10.25
11.68
0.896
1.014
1.131
1.249
1.367
1.485
1.604
1.722
1.841
1.960
2.078
2.197
2.316
2.435
2.554
2.673
2.792
2.911
3.030
3.149
3.388
3.507
3.626
3.745
3.864
3.983
4.103
4.341
4.460
5.534
4.699
4.818
5.057
5.176
5.534
6.011
6.249
6.488
6.965
7.443
7.562
7.681
8.158
8.397
9.352
9.829
11.261
1.462
1.618
1.775
1.932
2.089
2.247
2.405
2.563
2.721
2.879
3.038
3.196
3.355
3.513
3.672
3.831
3.989
4.148
4.307
4.466
4.783
4.942
5.101
5.260
5.419
5.578
5.737
6.055
6.214
7.645
6.532
6.691
7.009
7.168
7.645
8.281
8.599
8.917
9.554
10.190
10.349
10.508
11.145
11.463
12.736
13.372
15.281
1.67
1.84
2.00
2.17
2.33
2.49
2.65
2.81
2.98
3.14
3.30
3.46
3.62
3.78
3.94
4.10
4.26
4.42
4.58
4.74
5.06
5.22
5.38
5.54
5.70
5.86
6.02
6.33
6.49
7.93
6.81
6.97
7.29
7.45
7.93
8.57
8.89
9.20
9.84
10.48
10.64
10.80
11.43
11.75
13.03
13.66
15.57
1.149
1.305
1.462
1.619
1.776
1.934
2.092
2.250
2.408
2.566
2.725
2.883
3.042
3.200
3.359
3.518
3.676
3.835
3.994
4.153
4.470
4.629
4.789
4.947
5.106
5.265
5.424
5.742
5.901
7.332
6.219
6.378
6.696
6.855
7.332
7.968
8.286
8.605
9.241
9.877
10.036
10.195
10.832
11.150
12.423
13.059
14.969
1.462
1.618
1.775
1.932
2.089
2.247
2.405
2.563
2.721
2.879
3.038
3.196
3.355
3.513
3.672
3.831
3.989
4.148
4.307
4.466
4.783
4.942
5.101
5.260
5.419
5.578
5.737
6.055
6.214
7.645
6.532
6.691
7.009
7.168
7.645
8.281
8.599
8.917
9.554
10.190
10.349
10.508
11.145
11.463
12.736
13.372
15.281
1.67
1.84
2.00
2.17
2.33
2.49
2.65
2.81
2.98
3.14
3.30
3.46
3.62
3.78
3.94
4.10
4.26
4.42
4.58
4.74
5.06
5.22
5.38
5.54
5.70
5.86
6.02
6.33
6.49
7.93
6.81
6.97
7.29
7.45
7.93
8.57
8.89
9.20
9.84
10.48
10.64
10.80
11.43
11.75
13.03
13.66
15.57
1.156
1.312
1.469
1.626
1.783
1.941
2.099
2.257
2.415
2.573
2.732
2.890
3.049
3.207
3.366
3.525
3.683
3.842
4.001
4.159
4.477
4.636
4.794
4.954
5.113
5.272
5.431
5.749
5.908
7.339
6.226
6.385
6.703
6.862
7.339
7.975
8.294
8.611
9.246
9.883
10.044
10.202
10.840
11.156
12.430
13.067
14.976
Boston Gear 800-825-6544
317
I
Engineering Information
Sprocket Diameters for ANSI Standard Series Hubs
No.
of
Teeth
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
28
30
32
34
35
36
37
38
40
42
44
45
48
49
50
52
54
56
60
64
70
72
76
80
84
90
96
I
318
5/8” Pitch–No. 50
3/4” Pitch–No. 60
1” Pitch–No. 80
.400” Roller Diameter
.468” Roller Diameter
.625” Roller Diameter
Pitch
Outside Bottom
Pitch
Outside Bottom
Pitch
Outside
Bottom
Diameter Diameter Diameter Diameter Diameter Diameter Diameter Diameter Diameter
1.87
2.09
1.427
2.193
2.51
1.724
2.924
3.35
2.299
2.023
2.30
1.623
2.427
2.76
1.958
3.236
3.68
2.611
2.218
2.50
1.818
2.662
3.00
2.193
2.549
4.01
2.924
2.415
2.71
2.015
2.898
3.25
2.429
3.864
4.33
3.239
2.612
2.91
2.212
3.134
3.49
2.665
4.179
4.66
3.554
2.809
3.11
2.409
3.371
3.74
2.902
4.494
4.98
3.869
3.006
3.32
2.606
3.607
3.98
3.138
4.180
5.31
4.185
3.204
3.52
2.804
3.844
4.22
3.375
5.126
5.63
4.501
3.401
3.72
3.001
4.082
4.46
3.613
5.442
5.95
4.817
3.599
3.92
3.199
4.319
4.70
3.850
5.759
6.27
5.134
3.797
4.12
3.397
4.557
4.95
4.088
6.076
6.59
5.451
3.995
4.32
3.595
4.794
5.19
4.325
6.393
6.91
5.768
4.193
4.52
3.793
5.032
5.43
4.563
6.710
7.24
6.085
4.392
4.72
3.992
5.270
5.67
4.801
7.027
7.56
6.402
4.590
4.92
4.190
5.508
5.91
5.039
7.344
7.88
6.719
4.788
5.12
4.388
5.746
6.15
5.277
7.661
8.20
7.036
4.987
5.32
4.587
5.984
6.39
5.515
7.979
8.52
7.354
5.185
5.52
4.785
6.222
6.63
5.753
8.296
8.84
7.671
5.582
5.92
5.182
6.699
7.11
6.230
8.931
9.48
8.306
5.979
6.32
5.579
7.175
7.59
6.706
9.567
10.11
8.942
6.376
6.72
5.976
7.652
8.07
7.183
10.202
10.75
9.577
6.774
7.12
6.374
8.128
8.54
7.659
10.838
11.39
10.213
6.972
7.32
6.572
8.367
8.78
7.898
11.156
11.71
10.531
7.171
7.52
6.771
8.605
9.02
8.136
11.474
12.03
10.849
7.370
7.72
6.970
8.844
9.26
8.375
11.792
12.35
11.167
7.569
7.92
7.169
9.082
9.50
8.613
12.110
12.67
11.485
7.966
8.32
7.566
9.559
9.98
9.090
12.746
13.31
12.121
8.363
8.72
7.963
10.036
10.46
9.567
13.382
13.94
12.757
8.761
9.11
8.361
10.513
10.94
10.044
14.018
14.58
13.393
8.960
9.31
8.560
10.752
11.18
10.283
14.336
14.90
13.711
9.556
9.91
9.156
11.467
11.89
10.998
15.290
15.86
14.665
9.755
10.11
9.355
11.706
12.13
11.237
15.608
16.18
14.983
9.954
10.31
9.554
11.945
12.37
11.476
15.926
16.50
15.301
10.351
10.71
9.951
12.422
12.85
11.953
16.562
17.13
15.937
10.749
11.11
10349
12.899
13.33
12.430
17.198
17.77
16.573
11.147
11.50
10.747
13.376
13.81
12.907
17.835
18.41
17.210
11.942
12.30
11.542
13.330
14.76
13.861
19.107
19.68
18.482
12.738
13.10
12.338
15.285
15.72
14.816
20.380
20.96
19.755
13.931
14.29
13.531
16.717
17.15
16.248
22.289
22.87
21.664
14.329
14.69
13.929
17.194
17.63
16.725
22.926
23.50
22.301
15.124
15.49
14.724
18.149
18.58
17.680
24.199
24.78
23.574
15.920
16.28
15.520
19.103
19.54
18.634
25.471
26.05
24.846
16.715
17.08
16.315
20.058
20.49
19.589
26.744
27.33
26.119
17.909
18.27
17.509
21.490
21.93
21.021
28.654
29.24
28.029
19.102
19.47
18.702
22.922
23.36
22.453
30.563
31.15
29.938
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Horsepower & Torque Capacity of Shafting
Shaft Horsepower Based on Pure Torsion
at 10,000 PSI Maximum Shear Stress
30
50
100
175
690
1150
1750
Torque Capacity
(Lb. Ins.)
Based on 10,000 PSI
Shear Stress
0.049
0.078
0.117
0.166
0.228
0.303
0.394
0.501
0.625
0.769
0.933
1.12
1.32
1.56
1.82
2.11
2.42
2.77
3.15
3.56
4.00
4.48
5.00
5.55
6.15
6.78
7.46
8.18
8.95
9.77
10.6
11.5
12.5
13.5
14.5
15.7
16.8
0.082
0.130
0.194
0.277
0.380
0.506
0.656
0.834
1.04
1.28
1.55
1.86
2.21
2.60
3.03
3.51
4.04
4.62
5.25
5.93
6.67
7.47
8.33
9.26
10.2
11.3
12.4
13.6
14.9
16.2
17.7
19.2
20.8
22.5
24.3
26.1
28.1
0.164
0.261
0.389
0.554
0.760
1.01
1.31
1.66
2.08
2.56
3.11
3.73
4.43
5.21
6.07
7.03
8.08
9.24
10.5
11.8
13.3
14.9
16.6
18.5
20.5
22.6
24.8
27.2
29.8
32.5
35.4
38.4
41.6
45.0
48.6
52.3
56.2
0.287
0.456
0.681
0.969
1.32
1.76
2.29
2.92
3.64
4.48
5.44
6.53
7.75
9.11
10.6
12.3
11.1
16.1
18.3
20.7
23.3
26.1
29.1
32.4
35.8
39.6
43.5
47.7
52.2
56.9
62.0
67.3
72.9
78.8
85.0
91.6
98.4
1.13
1.79
2.68
3.82
5.24
6.97
9.05
11.5
14.3
17.6
21.4
25.7
30.5
35.9
41.9
48.5
55.8
63.7
72.4
81.8
92.1
103.1
115.0
127.8
141.5
156.1
171.7
188.3
206.0
224.7
244.5
265.4
287.6
310.9
335.1
361.2
388.3
1.88
2.99
4.47
6.36
8.73
11.6
15.0
19.1
23.9
29.4
35.7
42.9
50.9
59.9
69.8
80
93
106
120
136
153
171
191
213
235
260
286
313
343
374
407
442
479
518
559
602
647
2.87
4.56
6.80
9.69
13.2
17.6
22.9
29.2
36.4
44.3
54.4
65.3
77.5
91.1
106
123
141
161
183
207
233
261
291
324
358
396
435
477
522
569
620
673
729
788
850
916
984
103
164
245
349
479
637
827
1052
1314
1616
1961
2352
2792
3283
3830
4433
5097
5824
6618
7480
8414
9422
10509
11675
12925
14261
15686
17203
18815
20525
22335
24248
26268
29396
30637
32993
35466
Diameter
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
1
1-1/16
1-1/8
1-3/16
1-1/4
1-5/16
1-3/8
1-7/16
1-1/2
1-9/16
1-5/8
1-11/16
1-3/4
1-13/16
1-7/8
1-15/16
2
2-1/16
2-1/8
2-3/16
2-1/4
2-5/16
2-3/8
2-7/16
2-1/2
2-9/16
2-5/8
I
The above table is computed based on a torsional stress of 10,000 PSI. For applications involving
bending moments (gears, sprockets, etc.) the horsepower capacity must be reduced accordingly.
The stress level of 10,000 PSI is representative of medium carbon steel shafting. For other materials, a
correction must be made accordingly.
P-1930-BG
04/10
Boston Gear 800-825-6544
319
Engineering Information
Temperature Conversion Table
Degrees Celcius “C”; Degrees Fahrenheit “F”
Degree
C.
Degree
F.
Degree
C.
Degree
F.
Degree
C.
Degree
F.
Degree
C.
Degree
F.
Degree
C.
Degree
F.
–40
–39
–38
–37
–36
–40.0
–38.2
–36.4
–34.6
–32.8
8
9
10
11
12
46.4
48.2
50.0
51.8
53.6
56
57
58
59
60
132.8
134.6
136.4
138.2
140.0
104
105
106
107
108
219.2
221.0
222.8
224.6
226.4
152
153
154
155
156
305.6
307.4
309.2
311.0
312.8
–35
–34
–33
–32
–31
–31.0
–29.2
–27.4
–25.6
–23.8
13
14
15
16
17
55.4
57.2
59.0
60.8
62.6
61
62
63
64
65
141.8
143.6
145.4
147.2
149.0
109
110
111
112
113
228.2
230.0
231.8
233.6
235.4
157
158
159
160
161
314.6
316.4
318.2
320.0
321.8
–30
–29
–28
–27
–26
–22.0
–20.2
–18.4
–16.6
–14.8
18
19
20
21
22
64.4
66.2
68.0
69.8
71.6
66
67
68
69
70
150.8
152.6
154.4
156.2
158.0
114
115
116
117
118
237.2
239.0
240.8
242.6
244.4
162
163
164
165
166
323.6
325.4
327.2
329.0
330.8
–25
–24
–23
–22
–21
–13.0
–11.2
– 9.4
– 7.6
– 5.8
23
24
25
26
27
73.4
75.2
77.0
78.8
80.6
71
72
73
74
75
159.8
161.6
163.4
165.2
167.0
119
120
121
122
123
246.2
248.0
249.8
251.6
253.4
167
168
169
170
171
332.6
334.4
336.2
338.0
339.8
–20
–19
–18
–17
–16
–
–
–
+
4.0
2.2
0.4
1.4
3.2
28
29
30
31
32
82.4
84.2
86.0
87.8
89.6
76
77
78
79
80
168.8
170.6
172.4
174.2
176.0
124
125
126
127
128
255.2
257.0
258.8
260.6
262.4
172
173
174
175
176
341.6
343.4
345.2
347.0
348.8
–15
–14
–13
–12
–11
5.0
6.8
8.6
10.4
12.2
33
34
35
36
37
91.4
93.2
95.0
96.8
98.6
81
82
83
84
85
177.8
179.6
181.4
183.2
185.0
129
130
131
132
133
264.2
266.0
267.8
269.6
271.4
177
178
179
180
181
350.6
352.4
354.2
356.0
357.8
–10
– 9
– 8
– 7
– 6
14.0
15.8
17.6
19.4
21.2
38
39
40
41
42
100.4
102.2
104.0
105.8
107.6
86
87
88
89
90
186.8
188.6
190.4
192.2
194.0
134
135
136
137
138
273.2
275.0
276.8
278.6
280.4
182
183
184
185
186
359.6
361.4
363.2
365.0
366.8
–
–
–
–
–
5
4
3
2
1
23.0
24.8
26.6
28.4
30.2
43
44
45
46
47
109.4
111.2
113.0
114.8
116.6
91
92
93
94
95
195.8
197.6
199.4
201.2
203.0
139
140
141
142
143
282.2
284.0
285.8
287.6
289.4
187
188
189
190
191
368.6
370.4
372.2
374.0
375.8
0
+ 1
2
3
4
32.0
33.8
35.6
37.4
39.2
48
49
50
51
52
118.4
120.2
122.0
123.8
125.6
96
97
98
99
100
204.8
206.6
208.4
210.2
212.0
144
145
146
147
148
291.2
293.0
294.8
296.6
298.4
192
193
194
195
196
377.6
379.4
381.2
383.0
384.8
5
6
7
41.0
42.8
44.5
53
54
55
127.4
129.2
131.0
101
102
103
213.8
215.6
217.4
149
150
151
300.2
302.0
303.8
197
198
199
386.6
388.4
390.2
I
320
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Equivalent Table
FRACTION — DECIMAL — MILLIMETER
Fraction
Inches
Inch
Decimal
Equivalent
Millimeter
Equivalent
Fraction
Inches
Inch
Decimal
Equivalent
Millimeter
Equivalent
1/64
1/32
3/64
1/16
5/64
3/32
7/64
1/8
9/64
5/32
11/64
3/16
13/64
7/32
15/64
1/4
17/64
9/32
19/64
5/16
21/64
11/32
23/64
3/8
25/64
13/32
27/64
7/16
29/64
15/32
31/64
1/2
.0156
.0312
.0469
.0625
.0781
.0937
.1094
.1250
.1406
.1562
.1719
.1875
.2031
.2187
.2344
.2500
.2656
.2812
.2969
.3125
.3281
.3437
.3594
.3750
.3906
.4062
.4219
.4375
.4531
.4687
.4844
.5000
.397
.794
1.191
1.588
1.984
2.381
2.778
3.175
3.572
3.969
4.366
4.763
5.159
5.556
5.953
6.350
6.747
7.144
7.541
7.938
8.334
8.731
9.128
9.525
9.922
10.319
10.716
11.113
11.509
11.906
12.303
12.700
33/64
17/32
35/64
9/16
37/64
19/32
39/64
5/8
41/64
21/32
43/64
11/16
45/64
23/32
47/64
3/4
49/64
25/32
51/64
13/16
53/64
27/32
55/64
7/8
57/64
29/32
59/64
15/16
61/64
31/32
63/64
1
.5156
.5312
.5469
.5625
.5781
.5937
.6094
.6250
.6406
.6562
.6719
.6875
.7031
.7187
.7344
.7500
.7656
.7812
.7969
.8125
.8281
.8437
.8594
.8750
.8906
.9062
.9219
.9375
.9531
.9687
.9844
1.0000
13.097
13.494
13.891
14.288
14.684
15.081
15.478
15.875
16.272
16.669
17.066
17.463
17.859
18.256
18.653
19.050
19.447
19.844
20.241
20.638
21.034
21.431
21.828
22.225
22.622
23.019
23.416
23.813
24.209
24.606
25.003
25.400
MILLIMETER — INCHES
Millimeters
Inches
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
.0394
.0787
.1181
.1575
.1968
.2362
.2756
.3150
.3543
.3937
.4331
.4724
.5118
.5512
.5905
.6299
.6693
.7087
.7480
.7874
.8268
.8661
.9055
.9449
.9842
1.0236
1.0630
1.1024
1.1417
1.1811
I
P-1930-BG
04/10
Boston Gear 800-825-6544
321
Engineering Information
Metric Conversion Chart
Area
Volume
Multiply
By
Millimeters2
Centimeters2
Meters2
Inches2
Inches2
Feet2
Feet2
.00155
.155
10.76
645.16
6.452
929.03
.0929
To Obtain
Multiply
inches2
inches2
feet2
millimeters2
centimeters2
centimeters2
meters2
Centimeter3
Centimeter3
Liter
Liter
Liter
Inch3
Feet3
Gallon
Density
Multiply
By
lg/cm3
lg/cm3
lb/in3
lb/ft3
lb/ft3
lb/in3
lb/in3
gr/cm3
g/cm3
Kg/m3
Power
Multiply
Multiply
By
Gram
Kilogram
Kilogram
Ounce
Pound
.03527
35.27
2.205
28.35
453.6
.001341
3.967
.33000
746
.2521
To Obtain
Multiply
Horsepower
BTW/hour
ft-lb/min
watts
kilocalorie/hour
Newton-meter
in-lb
Millimeter
Centimeter
Meter
Inch
Feet
Feet
I
ounce
ounce
pounds
gram
grams
By
To Obtain
.03937
.3937
39.37
2.54
30.48
.3048
inch
inch
inch
centimeter
centimeter
meter
By
8.84
.113
To Obtain
in-lb
Newton-meter
Velocity
Multiply
Length
Multiply
To Obtain
Torque
By
Joule/sec
Kilocalorie/hour
Horsepower
Horsepower
BTU/hour
To Obtain
inches3
fluid ounce
inches3
feet3
U.S. gallon
centimeter3
liter
liter
Weight
To Obtain
.03613
62.43
27.68
.016
16.02
By
.0610
.034
61.02
.0353
.264
16.39
28.32
3.785
Centimeter/second
Centimeter/second
Meter/second
Meter/second
Meter/second
Inch/second
Inch/second
Foot/second
Foot/minute
By
.3937
1.969
3.281
196.9
2.237
25.4
2.54
.3048
.00508
To Obtain
inches/second
feet/minute
feet/second
feet/minute
miles per hour
millimeters/second
centimeters/second
meters/second
meters/second
BOSTON GEAR REGISTERED TRADEMARKS
BOSTON GEAR®
BOSTON®
BOStonE®
BOST-BRONZ®
BEAR-N-BRONZ®
322
Boston Gear 800-825-6544
P-1930-BG
04/10
Engineering Information
Application Classification for Various Loads
Type of Machine
To Be Driven
AGITATORS
Pure Liquid
Semi-Liquids, Variable Density
BLOWERS
Centrifugal and Vane
Lobe
BREWING AND DISTILLING
Bottling Machinery
Brew Kettles–Continuous Duty
Cookers – Continuous Duty
Mash Tubs – Continuous Duty
Scale Hopper – Frequent Starts
CAN FILLING MACHINES
CANE KNIVES
CAR DUMPERS
CAR PULLERS
CLARIFIERS
CLASSIFIERS
CLAY WORKING MACHINERY
Brick Press & Briquette Machine
Extruders and Mixers
COMPRESSORS
Centrifugal
Lobe – Reciprocating, Multi-Cycle
Reciprocating – Single Cycle
CONVEYORS—
UNIFORMLY LOADED & FED
Apron
Assembly-Belt – Bucket or Pan
Chain – Flight
Oven – Live Roll – Screw
CONVEYORS—HEAVY DUTY
NOT UNIFORMLY FED
Apron
Assembly-Belt – Bucket or Pan
Chain – Flight
Live Roll
Oven – Screw
Reciprocating – Shaker
CRANES AND HOISTS
Main Hoists
Bridge and Trolley Drive
CRUSHER
Ore, Stone
Sugar
P-1930-BG
04/10
Chart I For All Drives
Chart I For All Drives
Service Factor Loading
Service Factor Loading
Not More Not More
Than 15 Than 10
Mins. in Hrs. per
2 Hrs.
Day
More
Than
10 Hrs.
Per Day
0.80
1.00
1.00
1.25
1.25
1.50
0.80
1.00
1.00
1.25
1.25
1.50
0.80
—
—
—
—
—
—
—
—
—
—
1.00
—
—
—
1.25
1.00
1.50
1.75
1.25
1.00
1.25
1.25
1.25
1.25
1.25
1.50
—
—
—
—
1.25
1.50
—
1.00
1.75
1.25
2.00
1.50
—
—
—
1.00
1.25
1.75
1.25
1.50
2.00
—
—
—
—
1.00
1.00
1.00
1.25
1.25
1.25
1.25
1.50
—
—
—
—
—
—
1.25
1.25
1.25
—
1.25
1.75
1.50
1.50
1.50
—
1.50
2.00
*
1.00
1.25
—
—
1.75
1.50
2.00
1.50
Type of Machine
To Be Driven
Not More Not More
Than 15 Than 10
Mins. in Hrs. per
2 Hrs.
Day
ELEVATORS
Bucket – Uniform Load
Bucket – Heavy Load
Centrifugal Discharge
Freight
Gravity Discharge
FANS
Centrifugal – Light (Small Diam.)
Large Industrial
FEEDERS
Apron – Belt – Screw
Disc
Reciprocating
FOOD INDUSTRY
Beet Slicer
Cereal Cooker
Dough Mixer – Meat Grinder
GENERATORS (NOT WELDING)
HAMMER MILLS
HOISTS
Heavy Duty
Medium Duty and Skip Type
LAUNDRY TUMBLERS
LINE SHAFTS
Uniform Load
Heavy Load
MACHINE TOOLS
Auxiliary Drive
Main Drive – Uniform Load
Main Drive – Heavy Duty
METAL MILLS
Draw Bench Carriers & Main Drive
SLITTERS
TABLE CONVEYORS —
NON REVERSING
Group Drives
Individual Drives
Wiring Drawing,
Flattening or Winding
MILLS ROTARY TYPE
BALL AND ROD
Spur Ring Gear and
Direct Connected
Cement Kilns, Pebble
Dryers and Coolers
Plain and Wedge Bar
Tumbling Barrels
More
Than
10 Hrs.
Per Day
—
—
—
—
—
1.00
1.25
1.25
1.25
1.00
1.25
1.50
1.50
1.50
1.25
—
—
1.00
1.25
1.25
1.50
—
—
—
1.25
1.00
1.75
1.50
1.25
2.00
—
—
—
—
—
1.25
1.00
1.25
1.00
1.75
1.50
1.25
1.50
1.25
2.00
—
—
—
1.75
1.25
1.25
2.00
1.50
1.50
—
—
1.00
1.25
1.25
1.50
—
—
—
1.00
1.25
1.75
1.25
1.50
2.00
—
—
1.25
1.25
1.50
1.50
—
—
1.25
1.75
1.50
2.00
—
1.25
1.50
—
—
—
—
—
—
—
—
—
—
2.00
1.50
1.50
1.50
2.00
Boston Gear 800-825-6544
I
323
Engineering Information
Application Classification for Various Loads (Continued)
Type of Machine
To Be Driven
324
Chart I For All Drives
Service Factor Loading
Service Factor Loading
Not More Not More
Than 15 Than 10
Mins. in Hrs. per
2 Hrs.
Day
MIXERS
Concrete – Continuous
Concrete – Intermittent
Constant Density
Semi-Liquid
OIL INDUSTRY
Oil Well Pumping
Chillers, Paraffin Filter Press
Rotary Kilns
PAPER MILLS
Agitator (Mixer)
Agitator – Pure Liquids
Barking Drums – Mechanical
Barkers
Bleacher
Beater
Calender Heavy Duty
Calender Anti-Friction Brgs.
Cylinders
Chipper
Chip Feeder
Coating Rolls – Couch Rolls
Conveyors – Chips – Bark –
Chemical
Conveyors – Log and Slab
Cutter
Cylinder Molds, Dryers
(Anti-Friction Brg.)
Felt Stretcher
Screens – Chip and Rotary
Thickener (AC)
Washer (AC)
Winder – Surface Type
PLASTICS INDUSTRY
Intensive Internal Mixers
Batch Type
Continuous Type
Batch Drop Mill – 2 Rolls
Compounding Mills
Calenders
Extruder – Variable Speed
Extruder – Fixed Speed
PULLERS
Barge Haul
I
Chart I For All Drives
Boston Gear 800-825-6544
More
Than
10 Hrs.
Per Day
—
—
—
—
1.25
1.25
1.00
1.25
1.50
1.50
1.25
1.50
—
—
—
—
1.25
1.25
*
1.50
1.50
—
—
1.25
1.00
1.50
1.25
—
—
—
—
—
—
—
—
—
1.75
1.00
1.25
—
1.00
1.25
—
1.25
1.00
2.00
1.25
1.50
2.00
1.25
1.50
2.00
1.50
1.25
—
—
—
1.00
—
—
1.25
2.00
2.00
—
—
—
—
—
—
—
1.25
1.25
1.25
1.25
—
1.25
1.50
1.50
1.50
1.50
1.25
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.75
2.00
1.25
1.25
1.50
1.50
1.75
—
—
2.00
Type of Machine
To Be Driven
PUMPS
Centrifugal
Proportioning
Reciprocating
Single Acting,
3 or more Cycles
Double Acting,
2 or more Cycles
Rotary – Gear or Lube
RUBBER INDUSTRY
Batch Mixers
Continuous Mixers
Calenders
Extruders – Continuous
Extruders – Intermittent
Tire Building Machines
Tire & Tube Press Openers
SEWAGE DISPOSAL
EQUIPMENT
Bar Screens
Chemical Feeders
Collectors
Dewatering Screws
Scum Breakers
Slow or Rapid Mixers
Thickeners
Vacuum Filters
SCREENS
Air Washing
Rotary – Stone or Gravel
Traveling Water Intake
SKIP HOISTS
SLAB PUSHERS
STOKERS
TEXTILE INDUSTRY
Batchers or Calenders
Cards
Card Machines
Dry Cans and Dryers
Dyeing Machines
Looms
Mangles, Nappers and Pads
Soapers, Tenner Frames
Spinners, Washers, Winders
TUMBLING BARRELS
WINDLASS
Not More Not More
Than 15 Than 10
Mins. in Hrs. per
2 Hrs.
Day
More
Than
10 Hrs.
Per Day
—
—
—
—
1.25
1.50
—
1.25
1.50
—
—
1.25
1.00
1.50
1.25
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.75
1.50
1.50
1.50
1.75
—
—
—
—
—
—
—
—
—
—
1.00
1.00
1.00
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.50
1.50
1.50
1.50
1.50
—
—
—
—
—
—
1.00
1.25
1.00
—
1.25
—
1.25
1.50
1.25
—
1.50
1.25
—
—
—
—
—
—
—
—
—
1.50
—
1.25
1.25
1.75
1.25
1.25
1.25
1.25
1.25
1.25
1.75
1.25
1.50
1.50
2.00
1.50
1.50
1.50
1.50
1.50
1.50
2.00
1.50
P-1930-BG
04/10
Index to Catalog Numbers
Catalog Number
Description
Page No.
0-B(L)G*
0-H(U)G*
06000
06724*
1 (A. AA)
Chain Tensioners
Chain Tensioners
Gear Gauge Set
Thrust Washers
Ladder Chains
294
296
62
118
254
2 (1/2)
2S(S)C12*
2S(S)C25*
3A-1/2*
3A-1/2 B&C*
Ladder Chains
Clamp Collars
Clamp Collars
Adj. Shaft Supports
Replacement Bearings
254
3F(T)-1/2*
3H(L)-1/2*
3M035060*
5M064150*
5R21-16S*
Flange Cartridges
Pillow Blocks
Timing Belts
Timing Belts
Coupling Sleeve Stock
8P40AF(D,GS)-1/4*
12EMAF(D,GS)*
15BP(SS)7*
25A(B)9*
25B9SS*
Catalog Number
Description
BG11-1-3-3*
BG47-2-2*
BL423*
Shaft Couplings
Shaft Couplings
Leaf Chains
Page No.
103
103
253
C
C1-6*
C2040HP*
CA7*
CA(S)C18*
CB1(A)6*
Ladder Chain Sprockets
Roller Chain
Ladder Chain Sprockets
Clamp Collars
Ladder Chain Sprockets
292
252
291
116
291
225
218
124
130
CB3-10*
CB816*
CBT60*
CD1142*
CFHD(L)-3*
Lader Chain Sprockets
Bost-Bronz Cored Bars
Chain Breakers
Worm Gears
Rod Ends
292
144
256
89
200
Roll End Bearings
Roll End Bearings
Roller Chain Sprockets
Roller Chain Sprockets
Roller Chain Sprockets
166
162
266
267
268
CG1042*
CMHD(L)-3*
CQ1342*
CR4*
CS(S)C10-32*
CSC12*
Worm Gears
Rod Ends
Worm Gears
Shaft Couplings
Clamp Collars
Clamp Collars
89
200
89
105
115
116
35A(B)8*
35B9SS*
35B12T1-8*
40A(B)9*
40B10SS*
Roller Chain Sprockets
Roller Chain Sprockets
Idler Sprockets
Roller Chain Sprockets
Roller Chain Sprockets
269
271
293
274
278
40HP*
41A(B)22*
50A(B)8*
5(6)0-BG*
60A(B)8*
Roller Chain
Roller Chain Sprockets
Roller Chain Sprockets
Chain Tensioners
Roller Chain Sprockets
252
272
279
295
283
60H*
80A(B)8*
601*
622AF(D,GS)-1/8*
1602DC(DS)*
Roller Chain
Roller Chain Sprockets
Ball Bearings
Roll End Bearings
Ball Bearings
245
287
194
162
185
3002DC(DS)*
7508DL(DLG)*
7610DL(DLG)*
11722*
18510*
Ball Bearings
Ball Bearings
Ball Bearings
Shaft Couplings & Inserts
Steel Bushings
190
187
188
102
119
18800*
31300(4)
Steel Washers*
Bear-N-Bronz Banks
118
154
117
231
213
A
A(AA1)*
AF1012-6*
AO1*
Roller Chain Attachments
Bostone Bearings
Ball Bearings
251
161
193
B
B24-1*
B503*
BBB-1
BF7-3/8-3/8*
Bost-Bronz Bearings
Block Chains
Bost-Bronz Bank
Shaft Couplings
138
253
154
102
D
D1
D35B16*
D40B13*
D50B15*
D60B15*
Roller Chain Attachments
Roller Chain Sprockets
Roller Chain Sprockets
Roller Chain Sprockets
Roller Chain Sprockets
251
271
278
282
286
D(B)620A*
D(B)860A*
D1080A
D1118*
D1126*
Worm Gears
Worm Gears
Worm Gear
Worm Gears
Worm Gears
93
92
91
86
87
D1134*
D1142*
D1260A*
D(B)1400*
D1407K
Worm Gears
Worm Gears
Worm Gears
Worm Gears
Worm
88
89
90
90
90
D(B)1410*
D1418K*
D1418-10
D(B)1420A*
D(B)1427K*
Worm Gears
Worms
Bostone Bearing
Worm Gears
Worms
91
91
161
92
92
D(B)1430A*
D1438(K)*
D(B)1600*
D(B)1610*
D(B)1620A*
Worm Gears
Worms
Worm Gears
Worm Gears
Worm Gears
93
93
90
91
92
D(B)1630A*
DH1407*
DH1418*
DH1438*
DSH-1
Worm Gears
Worms
Worms
Worms
Worm
93
90
91
93
86
I
*Initial number, larger numbers arranged according to size.
P-1930-BG
04/10
Boston Gear 800-825-6544
325
Index to Catalog Numbers
Catalog Number
Description
DTH-1
DUH
DVH-1
DH1427*
Worm
Worm
Worm
Worms
Page No.
Catalog Number
Description
87
88
89
92
GDUH
GDVH-1
GF20*
GFB10A
GH20*
Worm
Worm
Change Gears
Compound Bushing
Change Gears
88
89
31
31
32
F
F7612B*
FA5-3/16-3/16*
FB25-2*
FC12-3/8*
FC12-SOLID*
Ball Bearing Insert
Shaft Coupling
Bost-Bronz Flanged Brgs.
Shaft Coupling
Shaft Coupling
169
105
141
100
101
GH1056
GH1066
GH1076
GH1086
GHB8A
Worm
Worm
Worm
Worm
Compound Bushing
90
91
92
93
32
FCP21-1/8*
FH547*
FP35-2*
Shaft Coupling
Roll End Adaptors
Bostone Flanged Brgs.
106
169
156
GLSH-1
GLTH-1
GLUH
GLVH-1
GP579-1*
Worm
Worm
Worm
Worm
Racks
86
87
88
89
35
G
I
Page No.
G(S)24*
G96*
G182*
G226*
G460Y*
Pinion Wire
Spur Gears
Spur Gears
Spur Gears
Miter Gears
34
18
19
21
70
GP1018(-1/8)*
GP1026(-3/16)*
GP1034(-3/16)*
GP1616Y*
GP2424Y*
Worm Gears
Worm Gears
Worm Gears
Miter Gears
Miter Gears
86
87
88
71
70
G478Y-G*
G632*
G(B)850*
G1018*
G1026*
Bevel Gears
Internal Gears
Worm Gears
Worm Gears
Worm Gears
74
36
92
86
87
GQSH-1
GQTH-1
GQUH
GQVH-1
GS48-7*
Worm
Worm
Worm
Worm
Bostone Bearings
86
87
88
89
161
G1034*
G1042*
G(B)1050A*
G(B)1060A*
G1066K
Worm Gears
Worm Gears
Worm Gears
Worm Gears
Worm
88
89
90
91
91
GSS460Y*
GSS479Y*
Miter Gears
Bevel Gears
70
74
G(B)1070*
G1076K
G(B)1077*
G1086K
G(B)1100*
Worm Gears
Worm
Worm Gears
Worm
Worm Gears
92
92
93
93
94
H608L(R)*
H917
H1008L(R)*
H1056*
H1066*
Helical Gears
Block Chain Sprockets
Helical Gears
Worms
Worms
65
290
64
90
91
G1106KL(R)
G1110*
G1116K
G1202*
G(B)1260
Worm
Worm Gears
Worm
Grooved Pulley
Worm Gear
94
95
95
120
90
H1076*
H1086*
H1106
H1116
H1427L(R)
Worms
Worms
Worm
Worm
Worms
92
93
94
95
92
G1616GS-1/2
G(B)8100*
GA20*
GAB20A
GB20*
Guide Roll Bearing
Worm Gears
Change Gears
Compound Bushing
Change Gears
170
92
28
28
29
H2412*
H3216*
HB612L(R)*
HDSH-1
HDTH-1
Spur Gears
Spur Gears
Helical Gears
Worm
Worm
20
19
65
86
87
GBB16A*
GD20A*
GDB12A
GDSH-1
GDTH-1
Compound Bushing
Change Gears
Compound Bushing
Worm
Worm
29
30
30
86
87
HDUH
HDVH-1
HF(L)-3*
HF(L)-3C*
HF(L)-4CG*
Worm
Worm
Rod Ends
Rod Ends
Rod Ends
88
89
201
199
199
G1202*
Pulleys
120
HF(L)-4G*
HF(L)E-3*
HFX(L)-4G*
Rod Ends
Rod Ends
Rod Ends
201
202
203
H
*Initial number, larger numbers arranged according to size.
326
Boston Gear 800-825-6544
P-1930-BG
04/10
Index to Catalog Numbers
Catalog Number
Description
Page No.
HL146Y-G*
HL147Y-G*
HL153Y-G*
HL156Y-G
Bevel Gears
Bevel Gears
Bevel Gears
Bevel Gears
75
74
76
77
HL1056*
HL1066*
HL1076*
HL1086*
HL1106
Worms
Worms
Worms
Worms
Worm
90
91
92
93
94
HL1116
HLK101Y*
HLK105Y*
HLSH-1
HLSK101Y*
Worm
Miter Gears
Miter Gears
Worm
Spiral Miter Gears
95
71
72
86
73
HLTH-1
HLUH
HLVH-1
HM(L)-3*
HM(L)-3C*
Worm
Worm
Worm
Rod Ends
Rod Ends
87
88
89
201
199
HM(L)-4CG*
HM(L)-4G*
HM(L)E-3*
HMX(L)-4G*
HP1106
Rod Ends
Rod Ends
Rod Ends
Rod Ends
Worm
199
201
202
203
94
HQSH-1
HQTH-1
HQUH
HQVH-1
HS608L(R)*
Worm
Worm
Worm
Worm
Helical Gears
86
87
88
89
65
J
J37(A)*
J37(B)*
J37(B)-01*
JP(D)25-1/8*
JPE37-1/8*
Universal Joints
Universal Joints
Universal Joint Parts
Universal Joints
Universal Joints
108
108
108
112
113
JS37(B)*
Universal Joints
108
K
K(KK)1(2)
KF(L)-3
Chain Attachments
Rod Ends
251
198
L
L93Y*
L99Y*
L105Y*
L146Y-G*
L147Y-G*
Miter Gears
Miter Gears
Miter Gears
Bevel Gears
Bevel Gears
70
71
72
75
74
L153Y-G*
L156Y-G*
L204-4*
L501-2*
L1056*
Bevel Gears
Bevel Gears
Racks
Racks
Worms
76
77
47
35
90
Catalog Number
Description
Page No.
L1066*
L1076
L1086*
L1106
L1116
Worms
Worm
Worms
Worm
Worm
91
92
93
94
95
L1427
L1438
LHA(B,SS)2*
LHSSE(VV)2*
LS3*
Worm
Worm
Spherical Bearings
Spherical Bearings
Spherical Bearings
92
93
204
205
206
LSA101Y*
LSH(P)
LTHB(P)
LUHB(P)
LVHB-1
Spiral Miter Gears
Worms
Worms
Worms
Worm
73
86
87
88
89
M1(35)
M35(2)
M35-4*
MB-1-7/16*
MBF-1-7/16*
Chain Attachments
Chain Attachments
Bear-N-Bronz Bearings
Pillow Blocks
Flanged Cartridges
251
251
146
222
229
MBP-1-7/16*
MCB816*
MM1(35)
MM1(35)(-2)
MS8*
Piloted Flanges
Bear-N-Bronz Cored Bars
Chain Attachments
Chain Attachments
Bear-N-Bronz Solid Bars
230
151
251
251
153
M
N
N6906(B)*
NA11B(-5/16)*
NAR5*
NB11B(-3/8)*
NBG15-1/2*
Ball Bearings
Spur Gears
Steel Stem Pinions
Spur Gears
Replacement Bearings
189
20
33
21
214
ND11B(-1/2)*
NF11B(-5/8)*
NF35-2-1/2
NH11B(-3/4)*
NJ11B(-1)*
Spur Gears
Spur Gears
Bostone Flanged Bearing
Spur Gears
Spur Gears
22
23
172
24
25
NK11B*
NL11B*
NO11B*
NR2000*
NR2105*
Spur Gears
Spur Gears
Spur Gears
Ball Bearing Sheaves
Ball Bearing Sheaves
26
27
27
195
196
NR2201*
NS35-2-1/2*
NT312*
NX3008-(LC,M)*
Ball Bearing Wheels
Bostone Bearings
Bostone Bearings
Replacement Bearings
197
172
173
213
I
O
OA424Y*
Miter Gears
72
*Initial number, larger numbers arranged according to size.
P-1930-BG
04/10
Boston Gear 800-825-6544
327
Index to Catalog Numbers
Catalog Number
Description
Page No.
P
P24-2*
P1250-2*
PA528Y-G(P)*
PA3212Y-G(P)*
PA3316Y-G(P)*
Boston F-1 Bearings
Nylon Cable Pulleys
Bevel Gears
Bevel Gears
Bevel Gears
156
173
77
76
75
PA3010(D,N)F060*
PA3010(D,N)F090*
PA5012(D,N)F090*
PA5012(D,N)F150*
PB5602*
Timing Belt Pulleys
Timing Belt Pulleys
Timing Belt Pulleys
Timing Belt Pulleys
Bost-Bronz Plates
125
126
131
132
143
PL3010(D,S)F090*
PL5011(D,S)F090*
PLB3010(D,S)F090*
PLB3032(D,S)F090*
PLB5011(D,S)F090*
Timing Belt Pulleys
Timing Belt Pulleys
Timing Belt Pulleys
Timing Belt Pulleys
Timing Belt Pulleys
127
133
128
129
134
PPB4-1/4*
PS-1/2*
PS(2,3)-1/2*
Pillow Blocks
Pillow Blocks
Flanged Cartridges
215
216
223
Catalog Number
Description
S(S)C12*
SCC1/4-1/4*
SF(T)-1/2*
SH(L)-1/2*
SH(S)82-G(P)*
Setscrew Collars
Shaft Couplings
Flanged Cartridges
Pillow Blocks
Spiral Bevel Gears
114
104
227
220
78
SP4*
SRP-1/4*
SS4
SS82-G(P)*
Bostone F-1 Solid Bars
Pillow Blocks
Bostone Stub Shaft
Spiral Bevel Gears
157
215
171
78
T
TB47*
TH35-60*
TP410*
TU816-6*
Bost-Bronz Thrust Brg.
Chain Pullers
Bostone Thrust Bearings
Take-Up Frames
UB37*
UJ(L,S)10(S,H)*
UJN(L,S)10-10*
UJ(L,S)(C,D)
Universal Joint Boot Kits
Universal Joint Yokes
Universal Joints
Universal Joint Center Kits
I
Worm Gears
Worm Gears
Worm Gears
Worm Gears
Worm Gears
93
92
91
90
86
Q1326*
Q1334*
Q1342*
QB(H)16*
QB616*
Worm Gears
Worm Gears
Worm Gears
Spur Gears
Worm Gears
87
88
89
22
93
QB808*
QB1016*
QB1212*
QD(H)15*
QFH15*
Worm Gears
Worm Gears
Worm Gears
Spur Gears
Spur Gears
92
91
90
23
23
QHH16*
QSH-1
QTH-1
QUH
QVH-1
Spur Gears
Worm
Worm
Worm
Worm
24
86
87
88
89
R
R700(D,GS)*
RFP46-4
RP46-2
RSP8
Bostone Bearing
Rulon Flange Bearings
Rulon Sleeve Bearings
Rulon Solid Bar
170
159
159
159
S
S2412*
S3216*
SA01*
SB4*
SC4
Spur Gears
Spur Gears
Ball Bearings
Bost-Bronz Solid Bars
Bostone Shaft Clip
20
19
193
144
171
143
256
157
232
U
Q
Q620A*
Q860A
Q1080A
Q1260A
Q1318*
Page No.
108
111
110
111
W
WA(1,2)
WK(1,2)
WM(1,2,35,35-2)
Chain Attachments
Chain Attachments
Chain Attachments
251
251
251
X
X5R21-16
XCBT60-5*
XFC(A,BB,R)12*
XFCP21-1/8*
XL-1/2*
XL(2,3)-1/2*
Shaft Coupling Part
Chain Breaker Tips
Shaft Coupling Part
Shaft Coupling Part
Pillow Blocks
Flanged Cartridges
106
256
101
106
217
224
Y
Y2412*
Y3212*
Y4812*
Y6416*
YA12(-5/16)*
Spur Gears
Spur Gears
Spur Gears
Spur Gears
Spur Gears
42
40
39
37
42
YB12(-3/8)*
YD12(-1/2)*
YF12(-5/8)*
YH12(-3/4)*
YI2436*
Spur Gears
Spur Gears
Spur Gears
Spur Gears
Internal Gears
43
43
44
45
48
YJ12(-1)*
YK12*
YP2412*
YP3212*
YP4818*
Spur Gears
Spur Gears
Spur Gears
Spur Gears
Spur Gears
45
46
41
39
37
YP4844*
YPB2412*
YPB3212*
YPB4818*
Spur Gears
Spur Gears
Spur Gears
Spur Gears
38
41
40
38
*Initial number, larger numbers arranged according to size.
328
Boston Gear 800-825-6544
P-1483-BG
10/09
Altra
Industrial Motion
Boston Gear
Boston Gear is a global supplier of quality power
transmission products to most major industrial markets. With
unparalleled delivery programs and superior customer service,
the power transmission consumer, distributor and OEMs who
demand the best, count on Boston Gear.
Boston Gear provides an extensive off-the-shelf product
offering of more than 20,000 products combined with the
ability to custom engineer unique solutions when required.
Products are designed to perform in an unlimited array of
industrial applications from unit handling to food processing
and everything in between including solutions for paper
converting, corrugated, mixers, hoists, pumps and steel.
Altra is a leading multinational
designer, producer and marketer
of a wide range of mechanical
power transmission products.
We sell our products in over 70
countries throughout the world.
Boston Gear
Boston Gear is a leading global supplier of quality power transmission products to most major industrial markets
including food processing, packaging machinery, material handling and many others. Along with unparalleled delivery
programs and superior customer service, the power transmission consumer, distributor, and OEM who demand the
best, count on Boston Gear.
Centric Products
Mechanical & Pneumatic
Overload Clutches
The full family of Centric overload clutches includes
Trig-O-Matic™, Trig-O-Matic Lite™, Model H units,
pneumatic disconnect models, and VariTorque
pneumatic models. Centric centrifugal clutches are
also offered. Bore ranges from 1/2" to 4-11/16".
Torque ranges from 35 in.lb. to 88,500 in.lb.
Our products are frequently used
in critical applications, such as
fail-safe brakes for elevators,
wheelchairs and forklifts as well
as in a wide range of highvolume manufacturing processes,
where reliability and accuracy are
important for both avoiding costly
downtime and enhancing the
overall efficiency of manufacturing
operations.
See Catalog P-1500-BG
Altra products are marketed
under a variety of well recognized
and established manufacturing
brand names including Warner
Electric, Boston Gear, TB Wood’s,
and Formsprag Clutch.
High Precision
Planetary Gearheads
The Boston Gear line of servo gearheads has
been designed for direct attachment to popular
servomotors. In-line and right angle units are offered
in a variety of single and double reduction ratios.
See Catalog P-1603-BG
Worm, Helical and Bevel
Gear Drives
Boston Gear’s comprehensive line of enclosed gear
drives includes worm, in-line and parallel-shaft helical,
miter, and spiral bevel. Flanged and non-flanged
models, single and double reduction units, and right
90 drives are available. And with our Reducer
Express™ service, we'll ship any of our 15 million
different speed reducer combinations, in stock or not,
by air within 24 hours - or we'll pay the freight.
bostongear.com
See Catalog P-1485-BG
Check out BostSpec2™, the online product
configurator at bostongear.com. Just input your
application’s requirements using the drop down
menus to identify performance criteria.
The right product will power its way up to the top.
• Download 2D and 3D CAD formats and dimensional line drawings.
• Submit an online RFQ to the local distributor of your choice.
P-1930-BG
4 /10
Boston Gear 800-825-6544
225
Altra Industrial Motion
A L T R A
I N D U S T R I A L
M O T I O N
All Customer Service phone numbers shown in bold
Engineered Couplings
Heavy Duty
Clutches and Brakes
Asia Pacific Sales Offices
Warner Electric
Ameridrives Couplings
Wichita Clutch
Australia
Electromagnetic Clutches
and Brakes
Mill Spindles, Ameriflex,
Ameridisc
Pneumatic Clutches
and Brakes
New Hartford, CT - USA
1-800-825-6544
Erie, PA - USA
1-814-480-5000
For application assistance:
1-800-825-9050
Gear Couplings
Wichita Falls, TX - USA
1-800-964-3262
Bedford, England
+44 (0) 1234 350311
Unit 51/9, Hoyle Avenue
Castle Hill, NSW 2154
+61 2 9894 0133
+61 2 9894 0368 (Fax)
St Barthelemy d’Anjou, France
+33 (0) 2 41 21 24 24
San Marcos, TX - USA
1-512-353-4000
Precision Electric Coils and
Electromagnetic Clutches and
Brakes
Bibby Transmissions
Columbia City, IN - USA
1-260-244-6183
Dewsbury, England
+44 (0) 1924 460801
Boksburg, South Africa
+27 11 918 4270
Matrix International
Electromagnetic Clutches
and Brakes, Pressure Operated
Clutches and Brakes
Brechin, Scotland
+44 (0) 1356 602000
New Hartford, CT - USA
1-800-825-6544
Inertia Dynamics
Spring Set Brakes; Power On and
Wrap Spring Clutch/Brakes
New Hartford, CT - USA
1-800-800-6445
Overrunning Clutches
Formsprag Clutch
Overrunning Clutches
and Holdbacks
Warren, MI - USA
1-800-348-0881– Press #1
For application assistance:
1-800-348-0881 – Press #2
Marland Clutch
Roller Ramp and Sprag Type
Overrunning Clutches
and Backstops
Burr Ridge, IL - USA
1-800-216-3515
Stieber Clutch
Overrunning Clutches
and Holdbacks
Heidelberg, Germany
+49 (0) 6221 30 47 0
Disc, Gear, Grid Couplings,
Overload Clutches
TB Wood’s
www.warnerelectric.com.au
China - Hong Kong
Twiflex Limited
Room 304A, 3rd Floor
Join-In Hang Sing Centre
71-75 Container Port Rd.
Kwai Chung, Hong Kong
+852 2615 9313
+852 2615 9162 (Fax)
Caliper Brakes and Thrusters
Twickenham, England
+44 (0) 20 8894 1161
Industrial Clutch
www.warnerelectric.com.hk
Pneumatic and Oil Immersed
Clutches and Brakes
China - Shanghai
Waukesha, WI - USA
1-262-547-3357
Shanghai Universal Mansion
Suite 703, 168 Yuyuan Road,
Shanghai 200040
+86 21 5169-9255
+86 21 6248 5387 (Fax)
Elastomeric Couplings
Chambersburg, PA - USA
1-888-829-6637– Press #5
For application assistance:
1-888-829-6637 – Press #7
General Purpose
Disc Couplings
San Marcos, TX - USA
1-512-353-4000
Ameridrives Power
Transmission
Universal Joints, Drive Shafts,
Mill Gear Couplings
Green Bay, WI - USA
1-920-593-2444
Gearing
Boston Gear
www.altramotion.com.cn
Enclosed and Open Gearing,
Electrical and Mechanical
P.T. Components
China - Taiwan
3rd Fl., No. 35, Lane 32
Kwang-Fu, South Road
10562 Taipei
+886 2 2577 8156
+886 2 2570 6358 (Fax)
Charlotte, NC - USA
1-800-825-6544
For application assistance:
1-800-816-5608
www.warnerelectric.com.tw
Nuttall Gear and
Delroyd Worm Gear
Singapore
Worm Gear and
Helical Speed Reducers
39 Benoi Road
Singapore 627725
+65 6487 4464
+65 6487 6674 (Fax)
Niagara Falls, NY - USA
1-716-298-4100
Huco Dynatork
www.warnerelectric.com.sg
Precision Couplings
and Air Motors
Belted Drives and Sheaves
Hertford, England
+44 (0) 1992 501900
Charlotte, NC - USA
1-800-825-6544
TB Wood’s
Thailand
Belted Drives
Chambersburg, PA - USA
1-888-829-6637 – Press #5
Linear Products
For application assistance:
1-888-829-6637 – Press #7
Warner Linear
Engineered
Bearing Assemblies
Linear Actuators and
Guideways
Belvidere, IL - USA
1-800-825-6544
For application assistance:
1-800-825-9050
178 Soi Anamai Srinakarin Rd.,
Suanluang Bangkok 10250
+66 2 322 5527
+66 2 320 2380 (Fax)
www.warnerelectric.co.th
For more information, or to contact
authorized agents in Japan, Korea, India,
or elsewhere in Asia Pacific, send an email
to: [email protected]
Kilian Manufacturing
Engineered Bearing Assemblies
Syracuse, NY - USA
1-315-432-0700
St Barthelemy d’Anjou, France
+33 (0) 2 41 21 24 24
www.bostongear.com
701 Carrier Drive
Charlotte, NC 28216 - USA
704-588-5610
Fax: 704-588-7181
P-1930-BG
4 /10
Printed in USA
BOSTON GEAR Gears, Bearings, Couplings and Shaft Accessories
Electromagnetic
Clutches and Brakes
Rotary Drive Products
Gears, Bearings, Couplings and Shaft Accessories

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