N-EUPEX® N-EUPEX-DS®

®
N-EUPEX
N-EUPEX-DS®
Flexible Couplings
Table of Contents
1. Introduction:
Table of Contents
N-EUPEX Selection Process
Service Factor Guidelines
Summary of Basic Types
Special Designs
NEMA Motor Reference &
N-EUPEX Selection Chart
5
2. Couplings:
Types B and A
Type H
Types E and D
6
7
8
2
2
3
4
5
Type M
N-EUPEX-DS Summary
N-EUPEX-DS – NEMA Motor Reference &
Selection Chart
N-EUPEX-DS
9
10
10
11
3. Engineering:
Shaft to Hub Fits
Common Practices
12
13
4. Coupling Installation
14
5. Coupling Maintenance
15
6. Flender Coupling Product Overview
16
Flender N-EUPEX Selection Process
Determine HP Capacity Per 100 RPM:
1. Select the appropriate service factor (SF) for
your application (see page 3).
2. Calculate the coupling HP capacity per 100 RPM:
HP × 10
0 × SF
HP per 100 RPM = RPM
Select a coupling with the same or higher
capacity from the HP per 100 RPM column from
the tables on pages 6–11.
Check Bore Limitations:
1. Determine each hub’s maximum bore diameter
for the selected coupling from the tables on
pages 6–11.
2. Confirm that both shaft ends of your application
do not exceed the maximum coupling bore
diameters.
Check Speed Limitations:
1. Determine the maximum speed of the selected
coupling from the tables on pages 6–11.
2. Confirm your actual speed does not exceed the
coupling’s maximum speed.
Check Critical Dimensions:
Check the coupling’s OD, overall length, shaft
separation, etc. to determine if it will fit your
application.
Check Overload Capacity:
Example:
Motor—40 HP; 3,600 RPM; 1.875" shaft
Centrifugal pump—1.375" shaft
DBSE = 3.5 inches
Operation is 8 hours per day
Determine HP Capacity Per 100 RPM:
1. An N-EUPEX coupling is selected to connect an
electric motor to a centrifugal pump. The
application and hours of operation result in
SF = 1.00
40 × 100 × 1
2. HP per 100 RPM = = 1.11 HP
3,600
Since a (Type H) spacer coupling is needed, an
H 95 is selected with a rating of 1.5 HP per 100 RPM.
Check Bore Limitations:
The motor shaft is 1.875" while the H 95 maximum
bore is only 1.625". Therefore, the selection must
be changed to an H 125 with a 2.125" maximum bore.
Check Speed Limitations:
The H 125 has a maximum speed of 5,000 RPM—OK.
Check Critical Dimensions:
Specify the 3.5" S3 dimension. All other
dimensions are OK.
Check Overload Capacity:
Service factor was sufficient to handle expected
overloads.
1. Maximum torque may occur for a short period of
time (i.e. during start-up, motor short circuit, etc.).
If further assistance is required, contact your local
Flender representative or Flender sales office.
2. This maximum torque should not exceed three
times the N-EUPEX coupling’s nominal torque
rating.
NOTE: For additional information, see NEMA
Motor Reference and N-EUPEX Selection Chart
(pages 5 & 10).
2
N-EUPEX Flexible Couplings—Service Factor Guildelines
General service factor guidelines are based on AGMA tables developed by assessing the input and output factors, as well as
the demand of various applications. Specific design data or vibration calculations can be obtained from Flender, upon request.
Service factors for gear drives driven by motors (hydraulic or electric) and turbines (steam or gas) see Note 3.
Table 3.1
Application
Load Duration (hrs/day) Application
up to 3 10 24
Agitators (Mixers)
Pure Liquids
Liquids and Solids
Liquids - Variable Density
Blowers
Centrifugal
Lobe
Vane
Brewing & Distilling
Bottling Machinery
Brew Kettles - cont. duty
Cookers - cont. duty
Mash Tubs - cont. duty
Scale Hopper - frequent starts
Can Filling Machines
Car Dumpers
Car Pullers
Clarifiers
Clay Working Machinery
Brick Press
Briquette Machine
Pug Mill
Compactors
Compressors
Centrifugal
Lobe
Reciprocating
—multi-cyl
—single-cyl
Conveyors - General Purpose
Uniformly loaded or fed
Heavy duty - not uniformly fed
Reciprocating or Shaker
Cranes (see note 1)
Dry Dock
Main Hoist
Auxiliary Hoist
Boom Hoist
Slewing Drive
Traction Drive
Container
Main Hoist
Boom Hoist
Trolley Drive
Gantry Drive
Traction Drive
Mill Duty
Main Hoist
Auxiliary Hoist
Bridge
Trolley Travel
Industrial Duty
Main Hoist
Auxiliary Hoist
Bridge
Trolley Travel
Crusher - Stone or Ore
Dredges
Cable Reels
Conveyors
Cutter Head Drives
Pumps
Screen Drives
Stackers
Winches
Elevators
Bucket
Centrifugal Discharge
Escalators
Freight
Gravity Discharge
1.00 1.00 1.25
1.00 1.25 1.50
1.00 1.25 1.50
1.00 1.00 1.25
1.00 1.25 1.50
1.00 1.25 1.50
1.00
1.25
1.25
1.25
1.25
1.00
1.50
1.00
1.00
1.00
1.25
1.25
1.25
1.25
1.00
1.75
1.25
1.00
1.25
1.25
1.25
1.25
1.50
1.25
2.00
1.50
1.25
1.50
1.50
1.00
2.00
1.75
1.75
1.25
2.00
2.00
2.00
1.50
2.00
1.00 1.00 1.25
1.00 1.25 1.50
1.50 1.50 1.75
1.75 1.75 2.00
1.00 1.00 1.25
1.25 1.25 1.50
1.75 1.75 2.00
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
3.00
2.50
3.00
3.00
3.00
3.00
3.00 3.00 3.00
2.00 2.00 2.00
3.00 3.00 3.00
2.00 2.00 2.00
3.50
3.50
2.50
2.50
3.50
3.50
3.00
3.00
3.50
3.50
3.00
3.00
2.50
2.50
2.50
2.50
1.75
2.50
2.50
3.00
3.00
1.75
3.00
3.00
3.00
3.00
2.00
1.25
1.25
2.00
2.00
1.75
1.25
1.25
1.25
1.25
2.00
2.00
1.75
1.25
1.25
1.50
1.50
2.00
2.00
2.00
1.50
1.50
1.00
1.00
1.00
1.00
1.00
1.25
1.00
1.00
1.25
1.00
1.50
1.25
1.25
1.50
1.25
Load Duration (hrs/day) Application
up to 3 10 24
Extruders
General
1.50
Plastics
- vari. Speed drive
1.50
- fixed Speed drive 1.75
Rubber
- cont. screw opr.
1.75
- intermit. Screw opr. 1.75
Fans
Centrifugal
1.00
Cooling Towers
2.00
Forced Draft
1.25
Induced Draft
1.50
Industrial & Mine
1.50
Feeders
Apron
1.00
Belt
1.00
Disc
1.00
Reciprocating
1.50
Screw
1.00
Food Industry
Cereal Cooker
1.00
Dough Mixer
1.25
Meat Grinders
1.25
Slicers
1.25
Generators & Exciters 1.00
Hammer Mills
1.75
Hoists
Heavy Duty
1.75
Medium Duty
1.25
Skip Hoist
1.25
Laundry
Tumblers
1.25
Washers
1.50
Lumber Industry
Barkers
- spindle feed
1.25
- main drive
1.75
Conveyors - burners 1.25
- main or heavy duty 1.50
- main log
1.75
- re-saw, mry go md 1.25
Conveyors
- slab
1.75
- transfer
1.25
Chains
- floor
1.50
- green
1.50
Cut-off saws
- chain & drag
1.50
Debarking Drums
1.75
Feeds
- edger
1.25
- gang
1.75
- trimmer
1.25
Log Deck
1.75
Log Haul
- incline - well type 1.75
Log Turning Devices 1.75
Planer Feed
1.25
Planer Tilting Hoists 1.50
Rolls
- Live-off brg, - roll cases 1.75
Sorting Tables
1.25
Tipple Hoists
1.25
Transfers
- chain or craneway 1.50
Tray Drives
1.25
Veneer Lathe Drives 1.25
Metal Mills
Draw bench carriage & main 1.25
Runout tables, non-reversing
- group drives
1.50
- individual drives
2.00
Reversing Mills
2.00
Slab Pushers
1.50
Shears
2.00
Wire Drawing
1.25
Wire Winding Machines 1.25
1.50 1.50
1.50 1.50
1.75 1.75
1.75 1.75
1.75 1.75
1.00
2.00
1.25
1.50
1.50
1.25
2.00
1.25
1.50
1.50
1.25
1.25
1.00
1.75
1.25
1.50
1.50
1.25
2.00
1.50
1.00
1.25
1.25
1.25
1.00
1.75
1.25
1.50
1.50
1.50
1.25
2.00
1.75 2.00
1.25 1.50
1.25 1.50
1.25 1.50
1.50 2.00
1.25
1.75
1.25
1.50
1.75
1.25
1.50
1.75
1.50
1.50
2.00
1.50
1.75 2.00
1.25 1.50
1.50 1.50
1.50 1.75
1.50 1.75
1.75 2.00
1.25
1.75
1.25
1.75
1.50
1.75
1.50
1.75
1.75
1.75
1.25
1.50
1.75
1.75
1.50
1.50
1.75 1.75
1.25 1.50
1.25 1.50
1.50 1.75
1.25 1.50
1.25 1.50
1.25 1.50
1.50
2.00
2.00
1.50
2.00
1.25
1.50
1.50
2.00
2.00
1.50
2.00
1.50
1.50
Load Duration (hrs/day) Application
up to 3 10 24
Metal Strip Processing Machinery
Bridles
1.25 1.25
Coilers & Uncoilers 1.00 1.00
Edge Trimmers
1.00 1.25
Flatteners
1.25 1.25
Loopers (accumulators) 1.00 1.00
Pinch Rolls
1.25 1.25
Scrap Choppers
1.25 1.25
Shears
2.00 2.00
Slitters
1.00 1.25
Mills, Rotary Type
Ball & Rod
Spur ring gear
2.00 2.00
Helical ring gear
1.50 1.50
Direct connected
2.00 2.00
Cement Kilns
1.50 1.50
Dryers and coolers
1.50 1.50
Mixers
Concrete
1.25 1.25
Paper Mills (see note 2)
Agitator (mixer)
1.50 1.50
Agitator for Pure Liquors 1.25 1.25
Barking drums
2.00 2.00
Barkers - mechanical 2.00 2.00
Beater
1.50 1.50
Breaker Stack
1.25 1.25
Calender
- anti-friction brgs
1.25 1.25
- sleeve brgs
1.50 1.50
Chipper
2.00 2.00
Chip Feeder
1.50 1.50
Coating Rolls
1.25 1.25
Conveyors
- chip, bark, chemical 1.25 1.25
- log (including slab) 2.00 2.00
Couch Rolls
1.25 1.25
Cutter
2.00 2.00
Cylinder Molds
1.25 1.25
Dryers, Paper Mach
- anti-friction brgs
1.25 1.25
- sleeve brgs
1.50 1.50
Dryers, Conveyor
- anti-friction brgs
1.25 1.25
- sleeve brgs
1.50 1.50
Embosser
1.25 1.25
Extruder
1.50 1.50
Fourdrinier Rolls
1.25 1.25
Jordan
1.50 1.50
Kiln Drive
1.50 1.50
Mt. Hope Roll
1.25 1.25
Paper Rolls
1.25 1.25
Platter
1.50 1.50
Presses - felt & suction 1.25 1.25
Pulper
2.00 2.00
Pumps - vacuum
1.50 1.50
Reel - surface type
1.25 1.25
Screens
- chip
1.50 1.50
- rotary
1.50 1.50
- vibrating
2.00 2.00
Size Press
1.25 1.25
Super Calender
1.25 1.25
Thickener
- AC motor
1.50 1.50
- DC motor
1.25 1.25
Washer
- AC motor
1.50 1.50
- DC motor
1.25 1.25
Wind & Unwind Stand 1.00 1.00
Winders - surface type 1.25 1.25
Yankee Dryers
- anti-friction brgs
1.25 1.25
- sleeve brgs
1.50 1.50
Plastics Industry
Primary Processing
Intensive Mixers
- batch
1.75 1.75
- continuous
1.50 1.50
Note 1: Crane drives are to be selected based on gear tooth bending strength. Contact Flender for strength ratings.
Note 2: Service factors for paper mill applicatons are applied to the nameplate rating of the electric drive motor at motor base speed.
Note 3: For multi-cylinder engines multiply service factors by 1.25.
1.50
1.25
1.50
1.50
1.25
1.50
1.50
2.00
1.50
2.00
1.50
2.00
1.50
1.50
1.50
1.50
1.25
2.00
2.00
1.50
1.25
1.25
1.50
2.00
1.50
1.25
1.25
2.00
1.25
2.00
1.25
1.25
1.50
1.25
1.50
1.25
1.50
1.25
1.50
1.50
1.25
1.25
1.50
1.25
2.00
1.50
1.25
1.50
1.50
2.00
1.25
1.25
1.50
1.25
1.50
1.25
1.00
1.25
1.25
1.50
1.75
1.50
Load Duration (hrs/day)
up to 3 10 24
Plastics Industry (cont)
Primary Processing
Batch Drop Mill
- 2 smooth rolls
1.25
Cont Feed, Holding
& Blend Mill
1.25
Compounding Mill
1.25
Calenders
1.50
Secondary Processing
Blow Molders
1.50
Coating
1.25
Film
1.25
Pipe
1.25
Pre-Plasticizers
1.50
Rods
1.25
Sheet
1.25
Tubing
1.25
Pullers - Barge Haul
1.25
Pumps
Centrifugal
1.00
Proportioning
1.25
Reciprocating
- sgl acting, 3+ cyl.
1.25
- dbl acting, 2+ cyl.
1.25
Rotary - Gear, Lobe or Vane 1.00
Rubber Industry
Intensive Internal Mixer
- batch mixers
1.75
- continuous
1.50
Mixing Mill
- 2 smooth rolls
1.50
- with corrugated rolls 1.75
Batch Drop Mills
- 2 smooth rolls
1.50
Cracker Warmer
-1 corrugated roll
1.75
Cracker
- 2 corrugated rolls
2.00
Holding Feed
& Blend Mill-2 rolls
1.25
Refiner - 2 rolls
1.50
Calenders
1.50
Sand Muller
1.25
Sewage Disposal Equipment
Bar Screens
1.25
Chemical Feeders
1.25
Dewatering Screens
1.50
Scum Breakers
1.50
Slow or Rapid Mixers 1.50
Sludge Collectors
1.25
Thickeners
1.50
Vacuum Filters
1.50
Screens
Air Washing
1.00
Rotary -stone or gravel 1.25
Traveling Water Intakes 1.00
Sugar Industry
Beet Slicer
2.00
Cane Knives
1.50
Crushers
1.50
Mills - low speed end 1.75
Textile Industry
Batchers
1.25
Calenders
1.25
Cards
1.25
Dry Cans
1.25
Dryers
1.25
Dyeing Machinery
1.25
Looms
1.25
Mangles
1.25
Nappers
1.25
Pads
1.25
Slashers
1.25
Soapers
1.25
Spinners
1.25
Tenter Frames
1.25
Washers
1.25
Winders
1.25
1.25 1.25
1.25 1.25
1.25 1.25
1.50 1.50
1.50
1.25
1.25
1.25
1.50
1.25
1.25
1.25
1.25
1.50
1.25
1.25
1.25
1.50
1.25
1.25
1.50
1.50
1.00 1.25
1.25 1.50
1.25 1.50
1.25 1.50
1.00 1.25
1.75 1.75
1.50 1.50
1.50 1.50
1.75 1.75
1.50 1.50
1.75 1.75
2.00 2.00
1.25
1.50
1.50
1.25
1.25
1.50
1.50
1.50
1.25
1.25
1.50
1.50
1.50
1.25
1.50
1.50
1.25
1.25
1.50
1.50
1.50
1.25
1.50
1.50
1.00 1.25
1.25 1.50
1.00 1.25
2.00
1.50
1.50
1.75
2.00
1.50
1.50
1.75
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
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
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
3
N-EUPEX Flexible Couplings
Summary of Basic Types
N-EUPEX couplings are the ultimate solution for a wide variety of applications. They
are extremely reliable in the transmission of torque and excellent for overload
protection. Their unique design makes them quick and simple to install, and allows
for easy inspection and replacement of the flexible elements. The synthetic rubber
composition of the flexible elements provides excellent dampening characteristics.
The N-EUPEX features provide a wide range of benefits.
No lubrication is needed, reducing maintenance costs and contamination concerns
Misalignment protection reduces excessive wear on driving/driven equipment
Torsional vibration and shock loads are dampened to extend the life of
connected equipment
Higher torque density and bore capacity than most other elastomeric designs
Torque is uniformly transmitted to give higher reliability & longer coupling life
Compact design results in low weight and low mass moment of inertia
No special tools are needed for installation or alignment
Available in both failsafe and non-failsafe designs
The more common N-EUPEX coupling types are listed below. Various additional special types are also available.
Type B (two piece design)
Type A (three piece design—replace flexible
elements without disassembly of power train)
B Sizes 58 to 280
A Sizes 110 to 350
A Sizes 400 to 710
Used to connect two shafts for most
general industrial applications
(i.e. gear units, fans, motors etc.)
— has a failsafe flexible hub
Type B—up to a 4.125 inch bore
Type A—up to a 10.250 inch bore
Type H with spacer (with intermediate sleeve)
H Sizes 80 to 250
Used to connect two shafts that are a
large distance apart (i.e. pumps, etc.)
Type H—up to a 3.750 inch bore
Covering a distance between shafts
— from 3.500 inches
— to 9.843 inches
Type D, E and M—(Flexible Element Flange—
with a type B (one piece) hub, type A (two piece) hub or special hub)
D Sizes 110
to 520
E Sizes 68
to 280
M Sizes 125
to 350
Used to connect a shaft to various applications by using a bolt-on
flange (i.e. generators, etc.)
Type D—Flange w/ type A (two piece) hub—up to a 7.500 inch bore
Type E—Flange w/ type B (one piece) hub—up to a 4.125 inch bore
Type M—Flange w/ one piece special hub—up to a 4.500 inch bore
Type BDS and ADS
(Type B & A—has a non-failsafe flexible hub)
— Non-sparking (meets API 610)
Used to connect two shafts in a
hazardous area (i.e. API pumps, fans,
general equipment, etc.)
Type BDS—up to a 4.125 inch bore
Type ADS—up to a 7.500 inch bore
4
BDS Sizes 66 to 305
ADS Sizes 118 to 556
N-EUPEX Flexible Couplings Special Designs
N-EUPEX couplings are supplied in additional designs for various types of more specialized applications.
Some examples of the more common types are shown below.
Types L and K
(with brake drum)
Types O and P
(with flange mount brake drum
and flange)
Types B and A
(with brake disk)
Types G and F
(with flanged rigid hub and flange)
NEMA Motor Reference & N-EUPEX Selection Chart
Table 5.1
1.375
1.625
1.875
2.125
2.375
2.875
3.375
1.625
1.875
2.125
2.375
3⁄4
1
11⁄2
2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
100
10
15
20
25
30
40
50
60
75
100
58
68
80
95
110
125
160
180
225
95
110
125
140
160
180
3⁄4
3.60
2.40
3.60
2.40
3.60
2.40
2.52
1.68
1.98
1.32
1.48
1.18
2.37
1.77
2.16
1.80
3.36
2.52
1
11⁄2
2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
100
125
1.26
1.32
1.48
1.18
1.53
1.15
1.42
1.18
1.44
1.08
15
20
25
30
40
50
60
75
100
125
68
80
95
110
125
160
180
225
95
110
125
140
140
160
180
80
95
110
125
160
180
225
95
110
125
140
160
180
1.00
1.32
1.48
1.18
1.53
1.22
1.42
1.13
1.44
1.08
25
30
40
50
60
75
—
100
125
150
58
68
80
95
110
125
160
—
180
225
95
110
125
140
—
160
160
180
HP
3.60
2.40
2.40
1.44
1.92
1.44
1.68
1.26
1.58
1.32
1.48
1.18
2.37
1.89
—
2.16
4.03
3.36
11⁄2
4.80
58
2–3
2.40
5
2.88
68
71⁄2
1.92
10
2.88
80
15
1.92
20
2.52
95
25
2.01
30
2.64
110
40
1.98
50
2.37
125
60
1.98
75
3.79
160
100
2.84
125
3.45
180
150
2.88
200
Over
250 Max. Speed
11⁄2
4.80
58
2
3.60
3
4.80
68
5
2.88
1
7 ⁄2
3.84
80
10
2.88
15
3.36
95
20
2.52
25
3.16
110
30
2.64
40
2.97
125
50
2.37
60
4.74
160
75
3.79
——
—
100 180 4.32
125
Over
150 Max. Speed
1.00
1.32
1.48
1.18
1.53
1.22
—
1.42
1.13
1.44
30
40
50
60
75
100
125
150
200
250
25
30
40
50
60
75
—
100
125
150
95
110
125
140
160
1.68
1.26
1.58
1.32
1.05
1.18
1.46
1.22
1.42
1.13
HP
95
110
—
125
160
Service
Factor*
1
11⁄2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
—
100
125
150
Enclosed
N-EUPEX
25
30
40
50
60
75
100
125
150
200
68
3.60
2.40
2.40
1.44
1.92
1.44
1.68
1.26
1.58
1.32
1.48
1.18
2.37
1.89
2.16
1.72
3.36
2.52
Service
Factor*
1.12
1.32
1.58
1.32
1.53
1.22
1.02
1.26
1.44
1.15
58
Drip Proof
N-EUPEX
1
11⁄2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
100
125
150
200
HP
N-EUPEX
3.20
2.40
3.20
2.40
3.20
1.92
2.24
1.68
1.76
1.32
1.58
1.32
2.37
1.89
2.40
1.92
3.36
2.68
N-EUPEX
N-EUPEX
58
HP
3600 RPM
Enclosed
Service
Factor*
1.125
1⁄2
HP
1800 RPM
Drip Proof
Service
Factor*
284TS
286TS
324TS
326TS
364TS
365TS
404TS
405TS
444TS
445TS
0.875
1200 RPM
Drip P. & Enclosed
Service
Factor*
143T
145T
182T
184T
213T
215T
254T
256T
284T
286T
324T
326T
364T
365T
404T
405T
444T
445T
HP
Service
Factor*
Motor
NEMA Shaft
Frame Dia.
Size
(in.)
N-EUPEX
900 RPM
Drip P. & Enclosed
2.01
1.68
1.98
1.58
1.32
1.05
—
1.18
2.27
1.89
*NOTE: Service Factors are calculated by using the HP rating.
Selections are made with consideration given to both the maximum bore diameter and coupling HP rating
5
N-EUPEX Types B and A Flexible Couplings—Fail-safe Design
Type B (two piece design)—Type A (three piece design)
See page 5 for Selection Chart.
Type B (two piece design)
Type A (three piece design)—replace
flexible elements without disassembly of
power train
Part 3
Part 4
Part 2
Part 1
Part 1
Sizes 110 to 350
Sizes 58 to 280
Sizes 400 to 710
Table 6.1
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(lbs.)
(lbs.)
(lbs.)
0.8
0.8
1.2
1.2
1.3
1.4
1.3
1.5
1.7
1.9
2.0
2.4
2.6
2.28
2.68
3.15
3.74
4.33
4.92
5.51
6.30
7.09
7.87
8.86
9.84 1.73
11.02 2.05
0.938
1.125
1.500
1.625
1.875
2.125
2.250
2.375
2.875
3.250
3.375
3.750
4.125
1.57
1.97
2.68
2.99
3.39
3.94
3.94
4.25
4.92
5.51
5.91
6.50
7.09
0.3
0.3
0.4
0.5
0.6
0.7
0.8
0.8
0.8
0.9
0.7
0.7
0.8
0.8
0.8
1.2
1.4
1.6
2.0
2.2
2.4
2.8
3.1
3.5
3.9
4.3
Does Not Apply
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.5
0.7
1.7
2.6
4.2
6
7
10
15
21
25
39
53
0.5
0.7
1.6
3.1
4.4
7
8
10
16
23
29
36
46
1.0
1.4
3.3
5.7
9
14
15
21
31
44
54
75
99
5,000
1.813
5,000
2.125
4,900
2.250
4,250
2.375
3,800
2.875
3,400
3.250
3,000
3.375
2,750 1.73 3.750
2,450 1.85 4.125
1.85 3.750
2,150
3.46 4.625
2.32 4.000
1,950
3.46 5.500
2.52 4.500
1,700
3.86 5.875
3.07 4.750
1,550
4.65 5.125
3.46 5.375
1,400
5.28 7.000
3.86 5.500
1,300
5.43 7.500
1,200 4.65 7.875
1,100 5.04 8.625
1,000 5.43 9.500
950 5.43 10.250
3.39
3.94
3.94
4.25
4.92
5.51
5.91
6.50
7.09
6.50
7.87
7.09
9.06
7.87
9.84
8.46
10.43
9.45
11.81
9.84
12.40
12.60
13.86
15.12
16.38
1.3
1.4
1.3
1.5
1.7
1.9
2.0
2.4
2.6
4.33
4.82
5.51
6.30
7.09
7.87
8.86
9.84 1.18
11.02 2.05
1.73
12.40
3.46
2.32
13.78
3.46
2.52
15.75
3.86
3.07
17.32
4.65
3.46
18.90
5.28
3.86
20.47
5.43
22.05 4.65
24.02 5.04
25.98 5.43
27.95 5.43
1.438
1.750
1.875
2250
2.375
2.875
3.250
3.625
4.000
3.750
4.625
4.000
5.500
4.500
5.875
4.750
6.125
5.375
7.000
5.500
7.500
7.875
8.625
9.500
10.250
2.44
2.95
3.23
3.74
4.25
4.80
5.43
6.10
6.77
6.50
7.87
7.09
9.06
7.87
9.84
8.46
10.43
9.45
11.81
9.84
12.40
12.60
13.86
15.12
16.38
0.8
0.9
1.1
1.1
1.2
1.3
1.5
1.7
1.7
1.6
2.0
2.2
2.4
2.8
3.1
3.5
3.9
4.3
1.3
1.5
1.7
1.9
2.0
2.1
2.4
2.7
2.9
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
1.9
4.9
3.1
0.1
0.3
2.0
5.5
3.3
0.1
0.3
2.2
6.3
3.5
0.1
0.3
2.5
7.1
3.9
0.2
0.4
2.6
7.5
4.1
0.2
0.4
2.7
8.3
4.5
0.2
0.4
3.1
3.5
3.8
4.0
8.7
9.4
10.2
11.4
4.9
5.3
5.7
6.1
0.2
0.2
0.2
0.2
0.5
0.5
0.5
0.5
4
6
7
10
15
21
29
39
53
68
71
95
99
139
146
174
181
221
232
287
309
397
496
639
816
4
8
6
12
8
15
11
22
16
31
23
44
31
60
43
82
53
106
71
139
75
146
95
190
104 203
130 269
141 287
176 351
187 368
221 441
243 474
265 551
298 606
408 805
529 1,025
706 1,345
882 1,698
A 315
77
48,681
A 350
108
68,153
A 400
147
91,165
A 440
187
119,489
A 480
228
146,927
A 520
295
187,641
A
A
A
A
402
536
684
871
256,679
336,338
433,699
548,762
6
560
610
660
710
2.8
2.9
3.1
3.4
3.5
4.0
4.5
4.8
5.2
5.4
(in.)
Solid
(in.)
2.28
2.68
3.15
2.99
3.39
3.94
3.94
4.25
4.92
5.51
5.91
6.50
7.09
Solid
(in.)
1,416
2,124
3,186
4,957
7,789
11,860
17,702
24,783
34,519
(in.)
Part
4/2&3 Total
0.750
0.938
1.188
1.625
1.813
2.125
2.250
2.375
2.875
3.250
3.375
3.750
4.125
2.2
3.3
5.1
7.9
12
18
28
38
55
(in.)
1
5,000
5,000
5,000
5,000
5,000
5,000
4,900
4,250
3,800
3,400
3,000
2,750 1.73
2,450 1.85
110
125
140
160
180
200
225
250
280
(RPM)
Weight
(with medium size bore)
168
301
531
885
1,416
2,124
3,186
4,957
7,789
11,860
17,702
24,783
34,519
Solid
A
A
A
A
A
A
A
A
A
(lbs.-in.)
Solid
HP/
100
Type Size RPM
B 58
0.2
B 68
0.4
B 80
0.8
B 95
1.4
B 110 2.2
B 125 3.3
B 140 5.1
B 160 7.9
B 180
12
B 200
18
B 225
28
B 250
38
B 280
55
d2
u1
da
D1
d2
w1
l1
P
S1
D1
Flexible Hub (Part 1)
Pin Hub (Parts 4 or 2 & 3)
Lngth Reqd Distance
Nominal Max
Bore
Hub Width Cplg
Bore
Hub Width Thru Bolt Betwn Hubs
Torque Speed Pilot Max
OD @OD OD Pilot
Max
OD @ OD Bore Clear min. max.
N-EUPEX Type H Flexible Couplings—Fail-safe Design
Type H with spacer (intermediate sleeve)
See page 5 for Selection Chart.
Type H with intermediate sleeve—replace flexible elements without
disassembly of power train
Part 1
Part 7
Part 6
Part 5
S3 = Space between shafts
LZ = Length of intermediate sleeve
Table 7.1
d2
l1
u1
D1
Flexible Hub (Part 1)
HP/ Nominal Max
Bore
Hub Lngth Wdth
100 Torque Speed Pilot Max OD Thru Bore @OD
Type Size RPM (lbs.-in.) (RPM) (in.)
(in.)
(in.)
(in.)
(in.)
w2
da
d4
Lz
D1
d2
l2
w3
S2
S3
Pt 7 Spacer (Part 2)
Hub (Part 5)
Btwn
Wdth Cplg
Bore
Hub Lngth Wdth
Shaft
@OD OD OD Lngth Pilot Max OD Thru Bore @OD Gap Ends
(in.)
(in.)
(in.)
531
5,000
1.188 3.15 1.18 1.18 0.39 3.15 2.01
H 95
1.5
885
5,000
1.625 2.99 1.38 1.18 0.39 3.74 2.48
H 110 2.3
1,416 5,000
1.813 3.39 1.57 1.34 0.47 4.33 2.87
H 125 3.4
2,124 5,000
2.125 3.94 1.97 1.42 0.47 4.82 3.35
H 140 5.1
3,186 4,900
2.250 3.94 2.17 1.34 0.59 5.51 3.58
H 160 7.9
4,957 4,250
2.375 4.25 2.36 1.54 0.59 6.30 4.37
H 180 12.3 7,789 3,800
2.875 4.92 2.76 1.65 0.59 7.09 5.16
H 200 18.8 11,860 3,400
3.250 5.51 3.15 1.85 0.71 7.87 5.67
H 225 28.2 17,702 3,000
3.375 5.91 3.54 2.05 0.71 8.86 6.65
(in.)
Solid
0.8
Solid
H 80
(in.)
2.99
4.49
2.99
4.49
2.91
4.41
6.50
2.91
4.41
6.50
7.28
9.25
2.79
4.28
6.38
7.17
9.13
2.77
4.27
6.36
7.15
9.11
4.27
6.36
7.15
9.11
4.15
6.24
7.03
9.00
4.15
6.24
7.03
9.00
6.00
6.79 1.73
8.76
H 250 38.9 24,783 2,750 1.73 3.750 6.50 3.94 2.36 0.91 9.04 7.28
(in.)
(in.)
(in.)
(in.)
(in.)
1.250 2.17 1.77 0.35 0.20
1.625 2.76 1.77 0.35 0.20
1.97
1.813 3.15 1.97
2.36
1.97
1.97
2.125 3.54 2.36
2.76
3.15
2.56
2.56
2.250 3.94 2.56
2.56
3.15
2.76
2.76
2.375 4.25 2.76
2.76
3.15
0.43 0.20
0.43 0.20
0.59 0.20
0.59 0.24
2.875 4.92 3.15 0.59 0.24
3.250 5.51 3.54 0.71 0.24
3.375 5.91 3.94 0.71 0.24
3.750 6.50 4.33 0.83 0.31
(in.)
3.50
5.00
3.50
5.00
3.50
5.00
7.08
3.50
5.00
7.09
7.87
9.84
3.50
5.00
7.09
7.87
9.84
3.50
5.00
7.09
7.87
9.84
5.00
7.09
7.87
9.84
5.00
7.09
7.87
9.84
5.00
7.09
7.87
9.84
7.09
7.87
9.84
Weight
(with medium size bore)
1
Part
5+6+7 Total
(lbs.)
1.8
2.6
4.2
6.4
7.3
10
15
21
29
39
(lbs.)
(lbs.)
4.4
6.0
6.6
8.6
9.5
10
12
12
13
14
15
16
18
19
20
21
22
22
23
25
26
28
31
33
34
36
43
46
47
50
56
57
59
63
79
82
86
6.2
6.4
8.6
9.3
13
14
15
18
19
20
21
22
25
26
27
28
29
32
34
35
36
38
46
48
49
52
64
67
68
71
84
86
88
92
118
121
125
7
N-EUPEX Types D and E Flexible Couplings—Fail-safe Design
Type D & E to connect a shaft using a bolt-on flange
See page 5 for Selection Chart.
Type E (two piece design)
Type D (three piece design)—replace flexible elements without
disassembly of power train
Part 10
Part 10
Part 3
Part 2
Part 4
Sizes 68 to 280
Sizes 110 to 350
Sizes 400 to 520
Table 8.1
k
OD
h8
Bolt
Hole
Cntr
D2
s1
Flange dimensions
Bore
H7
c
u2
da
d2
D1
Pin Hub dimensions
# of Width Lgth
Bore
Hole Bolt Bolt
at Thru Cplng Hub Part 4 or 2
Size Size Holes OD Bore OD
OD Pilot Max
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
0.5
0.8
1.5
2.3
3.4
5.1
7.9
12.3
18.8
28.2
38.9
55.0
301
531
885
1,416
2,124
3,186
4,957
7,789
11,860
17,702
24,783
34,519
5,000
5,000
5,000
5,000
5,000
4,900
4,250
3,800
3,400
3,000
2,750
2,450
3.54
4.17
4.72
5.67
6.22
7.09
7.87
8.66
9.76
10.79
12.36
13.54
3.15
3.70
4.25
5.04
5.59
6.30
7.09
7.87
8.82
9.84
11.10
12.28
1.339
1.654
2.047
2.441
2.953
3.228
3.740
4.331
4.724
5.315
5.906
6.693
0.217
0.260
0.260
0.354
0.354
0.433
0.433
0.433
0.551
0.551
0.709
0.709
M5
M6
M6
M8
M8
M10
M10
M10
M12
M12
M16
M16
6
6
6
6
6
6
7
8
8
8
8
8
0.276
0.315
0.315
0.394
0.394
0.512
0.512
0.512
0.630
0.630
0.787
0.787
0.8
0.8
0.9
1.1
1.2
1.3
1.5
1.7
1.9
2.0
2.4
2.6
2.68
3.15
3.74
4.33
4.92
5.51
6.30
7.09
7.87
8.86
9.84
11.02
1.97
1.125
2.68
1.500
2.99
1.625
3.39
1.875
3.94
2.125
3.94
2.250
4.25
2.375
4.92
2.875
5.51
3.250
5.91
3.375
6.50 1.73 3.750
7.09 2.05 4.125
0.8
1.2
1.4
1.6
2.0
2.2
2.4
2.8
3.1
3.5
3.9
4.3
0.3
0.4
0.5
0.6
0.7
0.8
0.8
0.8
0.9
0.7
0.7
0.8
D
D
D
D
D
D
D
D
D
110
125
140
160
180
200
225
250
280
2.3
3.4
5.1
7.9
12.3
18.8
28.2
38.9
55.0
1,416
2,124
3,186
4,957
7,789
11,860
17,702
24,783
34,519
5,000
5,000
4,900
4,250
3,800
3,400
3,000
2,750
2,450
5.67
6.22
7.09
7.87
8.66
9.76
10.79
12.36
13.54
5.04
5.59
6.30
7.09
7.87
8.82
9.84
11.10
12.28
2.441
2.953
3.228
3.740
4.331
4.724
5.315
5.906
6.693
0.354
0.354
0.433
0.433
0.433
0.551
0.551
0.709
0.709
M8
M8
M10
M10
M10
M12
M12
M16
M16
6
6
6
7
8
8
8
8
8
0.394
0.394
0.512
0.512
0.512
0.630
0.630
0.787
0.787
1.1
1.2
1.3
1.5
1.7
1.9
2.0
2.4
2.6
4.33
4.92
5.51
6.30
7.09
7.87
8.86
9.84
11.02
1.6
2.0
2.2
2.4
2.8
3.1
3.5
3.9
4.3
0.8
0.9
1.1
1.1
1.2
1.3
1.5
1.7
1.7
D 315 77.8 48,681 2,150 14.96 13.70 7.874 0.709 M16
9
0.866 2.8 12.40
D 350 108.6 68,153 1,950 16.93 15.35 8.858 0.866 M20
9
0.984 2.9 13.78
D 400 147.5 91,165 1,700 18.90 17.32 10.433 0.866 M20
10
0.984 3.1 15.75
D 440 187.7 119,489 1,550 20.47 18.90 11.614 0.866 M20
10
0.984 3.4 17.32
D 480 228.0 146,927 1,400 22.64 20.79 12.795 1.024 M24
10
1.181 3.5 18.90
D 520 295.0 187,641 1,300 24.21 22.36 13.976 1.024 M24
10
1.181 4.0 20.47
2.44
2.95
3.23
3.74
4.25
4.80
5.43
6.10
6.77
6.50
7.87
7.09
9.06
7.87
9.84
8.46
10.43
9.45
11.81
9.84
12.40
Solid
1.18
2.05
1.73
3.46
2.32
3.46
2.52
3.86
3.07
4.65
3.46
5.28
3.86
5.43
1.438
1.750
1.875
2.250
2.375
2.875
3.250
3.625
4.000
3.750
4.625
4.000
5.500
4.500
5.875
4.750
6.125
5.375
7.000
5.500
7.500
P
Lgth WdthReqd
Thru @ Bolt
Bore OD Clrnce
68
80
95
110
125
140
160
180
200
225
250
280
Solid
(in.)
w1
E
E
E
E
E
E
E
E
E
E
E
E
8
(in.)
l1
(in.)
S1
Distance
Between
the Hubs
min max
(in.)
Wt.
Total
(in.)
(lbs.)
Does Not Apply
HP/ Nominal Max
100 Torque Speed
TypeSize RPM (lbs.-in.) (RPM)
d3
0.079
0.079
0.079
0.079
0.079
0.079
0.079
0.079
0.079
0.079
0.118
0.118
0.157
0.157
0.157
0.157
0.157
0.157
0.236
0.236
0.236
0.236
0.315
0.315
1.5
3.0
4.6
7.1
10.6
13.7
17.6
25.4
36.4
41.9
61.7
77.2
1.3
1.5
1.7
1.9
2.0
2.1
2.4
2.7
2.9
0.079
0.079
0.079
0.079
0.079
0.079
0.079
0.118
0.118
0.157
0.157
0.157
0.236
0.236
0.236
0.236
0.315
0.315
6
9
13
18
25
35
47
68
84
111
116
150
159
201
212
265
276
337
359
408
441
4.9 1.9 3.1 0.118 0.315
5.5 2.0 3.3 0.118 0.315
6.3 2.2 3.5 0.118 0.315
7.1 2.5 3.9 0.197 0.394
7.5 2.6 4.1 0.197 0.394
8.3 2.7 4.5 0.197 0.394
N-EUPEX Type M Flexible Couplings—Fail-safe Design
Type M to connect a shaft using a bolt-on flange (with special hub)
See page 5 for Selection Chart.
Type M (two piece design)
Part 10
Part 9
Table 9.1
Type Size
M
M
M
M
M
M
M
M
M
M
125
140
160
180
200
225
250
280
315
350
HP/
100
RPM
3.4
5.1
7.9
12
19
28
39
55
78
109
Max. Speed
d3
l1 & w 2
Weight
c
u2
k
s
Flange dimensions (Part 10)
Width
Bolt
Nominal Max
OD Available
at
Hole Hole
Torque Speed From
To
OD Wdth Cntr Size
(lbs.-in.)
(RPM)
(in.)
(in.)
(in.)
(in.)
2,124
3,186
4,957
7,789
11,860
17,702
24,783
34,519
48,681
68,153
4,800
4,800
3,000
2,800
2,800
2,800
2,650
2,300
2,000
2,000
6.22
7.09
7.87
8.66
9.76
10.8
12.4
13.5
15.0
16.9
12.374
12.374
13.874
18.374
18.374
18.374
18.374
22.500
22.500
22.500
0.394
0.512
0.512
0.512
0.630
0.630
0.787
0.787
0.866
0.984
1.2
1.3
1.5
1.7
1.9
2.0
2.4
2.6
2.8
2.9
(in.)
(in.)
da
# of
Bolt
Holes
Per Customer
Specification
When Ordered
Cplg
OD
(in.)
4.921
5.512
6.299
7.087
Either Straight
7.874
Or Tapered Holes
8.858
May Be Specified
9.843
SeeTypes
11.024
D & E For
12.402
Smaller Flanges 13.780
D1
l1
S1
Pin Hub Dimensions (Part 9)
Lngth
Between
Bore
Thru
the Hubs
Pilot Max Bore min
max
(in.)
(in.)
(in.)
(in.)
(in.)
w2
Wt
Total
(in.)
(lbs.)
1.813 3.2 0.079 0.157 1.5
21
2.000 3.2 0.079 0.157 1.4
25
2.250 3.3 0.079 0.236 1.2
32
2.687 3.7 0.079 0.236 2.4
55
2.875 4.3 0.079 0.236 2.2
71
3.250 6.5 0.079 0.236 3.1
84
3.375 6.3 0.118 0.315 2.7 101
3.750 6.6 0.118 0.315 2.4 132
4.500 6.9 0.118 0.315 1.8 172
Only available with a type D hub (See page 6)
Solid
d3
Higher speeds limitations are available upon request
Exact OD is to be specified within these limits, when the order is placed
Hub may be made shorter upon request
Based on a hub with a medium size bore
9
N-EUPEX Types BDS and ADS Flexible Couplings—Non Fail-safe Design
Summary of Basic Types
N-EUPEX ADS, BDS and HDS couplings provide the same characteristics,
features, benefits and serviceability as the standard N-EUPEX couplings.
However, their unique design gives them an additional dimension. Recesses
are equally distributed around the circumference of the flexible element hub
(part 1). The flexible elements slip into these recesses.
If the application fails, the pin hub (parts 4 and parts 2/3) continue to rotate
and the flexible elements are forced out of their recesses. Since there is no
metal to metal contact, no sparks are created.
This coupling requires no special tools for installation or alignment.
CAUTION: The N-EUPEX-DS design is not intended to be used as a torque
limiting device.
NEMA Motor Reference & N-EUPEX-DS Selection Chart
Table 10.1
1.375
1.625
1.875
2.125
2.375
2.875
3.375
1.625
1.875
2.125
2.375
3⁄4
1
11⁄2
2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
100
10
15
20
25
30
40
50
60
75
100
66
76
88
103
118
135
172
194
245
103
118
135
152
172
194
3⁄4
3.60
2.40
3.60
2.40
3.60
2.40
2.52
1.68
1.98
1.32
1.48
1.18
2.37
1.77
2.16
1.80
3.36
2.52
1
11⁄2
2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
100
125
1.26
1.32
1.48
1.18
1.53
1.15
1.42
1.18
1.44
1.08
15
20
25
30
40
50
60
75
100
125
76
88
103
118
135
172
194
245
103
118
135
152
152
172
194
88
103
118
135
172
194
245
103
118
135
152
172
194
1.00
1.32
1.48
1.18
1.53
1.22
1.42
1.13
1.44
1.08
25
30
40
50
60
75
—
100
125
150
66
76
88
103
118
135
172
—
194
245
103
118
135
152
—
172
172
194
*NOTE: Service Factors are calculated by using the HP rating.
Selections are made with consideration given to both the maximum bore diameter and coupling HP rating
10
HP
3.60
2.40
2.40
1.44
1.92
1.44
1.68
1.26
1.58
1.32
1.48
1.18
2.37
1.89
—
2.16
4.03
3.36
11⁄2
4.80
66
2–3
2.40
5
2.88
76
71⁄2
1.92
10
2.88
88
15
1.92
20
2.52
103
25
2.01
30
2.64
118
40
1.98
50
2.37
135
60
1.98
75
3.79
172
100
2.84
125
3.45
194
150
2.88
200
Over
250 Max. Speed
11⁄2
4.80
66
2
3.60
3
4.80
76
5
2.88
1
7 ⁄2
3.84
88
10
2.88
15
3.36
103
20
2.52
25
3.16
118
30
2.64
40
2.97
135
50
2.37
60
4.74
172
75
3.79
——
—
100 194 4.32
125
Over
150 Max. Speed
1.00
1.32
1.48
1.18
1.53
1.22
—
1.42
1.13
1.44
30
40
50
60
75
100
125
150
200
250
25
30
40
50
60
75
—
100
125
150
103
118
135
152
172
1.68
1.26
1.58
1.32
1.05
1.18
1.46
1.22
1.42
1.13
HP
103
118
—
135
172
Service
Factor*
1
11⁄2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
—
100
125
150
Enclosed
N-EUPEX-DS
25
30
40
50
60
75
100
125
150
200
76
3.60
2.40
2.40
1.44
1.92
1.44
1.68
1.26
1.58
1.32
1.48
1.18
2.37
1.89
2.16
1.72
3.36
2.52
Service
Factor*
1.12
1.32
1.58
1.32
1.53
1.22
1.02
1.26
1.44
1.15
66
Drip Proof
N-EUPEX-DS
1
11⁄2
3
5
71⁄2
10
15
20
25
30
40
50
60
75
100
125
150
200
HP
N-EUPEX-DS
3.20
2.40
3.20
2.40
3.20
1.92
2.24
1.68
1.76
1.32
1.58
1.32
2.37
1.89
2.40
1.92
3.36
2.68
N-EUPEX-DS
N-EUPEX-DS
66
HP
3600 RPM
Enclosed
Service
Factor*
1.125
1⁄2
HP
1800 RPM
Drip Proof
Service
Factor*
284TS
286TS
324TS
326TS
364TS
365TS
404TS
405TS
444TS
445TS
0.875
1200 RPM
Drip P. & Enclosed
Service
Factor*
143T
145T
182T
184T
213T
215T
254T
256T
284T
286T
324T
326T
364T
365T
404T
405T
444T
445T
HP
Service
Factor*
Motor
NEMA Shaft
Frame Dia.
Size
(in.)
N-EUPEX-DS
900 RPM
Drip P. & Enclosed
2.01
1.68
1.98
1.58
1.32
1.05
—
1.18
2.27
1.89
N-EUPEX Types BDS and ADS Flexible Couplings—Non Fail-safe Design
N-EUPEX-DS is a non-sparking coupling (meets API610)—upon failure of flexible elements, the coupling
parts rotate independently of each other (there is no metal-to-metal contact)
See page 10 for Selection Chart.
Type BDS (two piece design); Type ADS (three piece design)—replace flexible elements without disassembly
of power train; Type HDS with spacer (intermediate sleeve)
Part 3
Part 1
Part 1
Part 2
Part 4
Sizes 66 to 305
Sizes 118 to 380
Sizes 430 to 556
Table 11.1
D1
ADS 118
ADS 135
ADS 152
ADS 172
ADS 194
ADS 218
ADS 245
ADS 272
ADS 305
ADS 340
u1
da
P
S1
Weight
(in.)
(with medium size bore)
1
Part
4/2&3 Total
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(lbs.)
(lbs.)
(lbs.)
2.30
2.70
3.10
2.99
3.39
3.94
4.25
4.65
5.31
5.91
5.91
6.50
7.09
0.8
0.8
1.2
1.2
1.3
1.4
1.4
1.6
1.7
1.9
2.0
2.4
2.6
2.60
2.99
3.46
4.06
4.65
5.31
5.98
6.77
7.64
8.58
9.65
10.71 1.73
12.01 2.05
0.938
1.125
1.500
1.625
1.875
2.125
2.250
2.375
2.875
3.250
3.375
3.750
4.125
1.57
1.97
2.68
2.99
3.39
3.94
3.94
4.25
4.92
5.51
5.91
6.50
7.09
0.3
0.3
0.4
0.5
0.6
0.7
0.8
0.8
0.8
0.9
0.7
0.7
0.8
0.8
0.8
1.2
1.4
1.6
2.0
2.2
2.4
2.8
3.1
3.5
3.9
4.3
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.5
0.7
2.2
3.5
4.2
7
9
13
19
26
32
44
60
0.7
0.9
2.0
3.3
4.6
8
10
13
18
27
32
42
54
1.2
1.7
4.2
6.8
9
15
19
25
37
53
64
86
113
2.2
3.3
5.1
7.9
12
18
28
38
55
1,416
2,124
3,186
4,957
7,789
11,860
17,702
24,783
34,519
5,000
5,000
4,900
4,250
3,800
3,400
3,000
2,750 1.73
2,450 1.85
1.813
2.125
2.250
2.375
2.875
3.250
3.375
3.750
4.125
3.39
3.94
4.25
4.65
5.31
5.91
5.91
6.50
7.09
1.3
1.4
1.4
1.6
1.7
1.9
2.0
2.4
2.6
1.3
1.5
1.7
1.9
2.0
2.1
2.4
2.7
2.9
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
4
7
9
13
19
26
32
44
60
4.625
7.87
2.8
1.9
4.9
3.1
0.1
0.3
84
ADS 380 108
68,153 1,950 2.32
5.500
9.06
2.9
2.0
5.5
3.3
0.1
0.3
119
ADS 430 147
91,165 1,700 2.52
5.875
9.84
3.1
2.2
6.3
3.5
0.1
0.3
168
ADS 472 187
119,489 1,550 3.07
6.125 10.43
3.4
2.5
7.1
3.9
0.2
0.4
209
ADS 514 228
146,927 1,400 3.46
7.000 11.81
3.5
2.6
7.5
4.1
0.2
0.4
262
ADS 556 295
187,641 1,300 3.86
7.500 12.40
4.0
2.44
2.95
3.23
3.74
4.25
4.80
5.43
6.10
6.77
6.50
7.87
7.09
9.06
7.87
9.84
8.46
10.43
9.45
11.81
9.84
12.40
1.6
2.0
2.2
2.4
2.8
3.1
3.5
3.9
4.3
48,681 2,150 1.85
1.438
1.750
1.875
2.250
2.375
2.875
3.250
3.625
4.000
3.750
4.625
4.000
5.500
4.500
5.875
4.750
6.125
5.375
7.000
5.500
7.500
0.8
0.9
1.1
1.1
1.2
1.3
1.5
1.7
1.7
77
4.65
5.31
5.98
6.77
7.64
8.58
9.65
10.71 1.18
12.01 2.05
1.73
13.39
3.46
2.32
14.96
3.46
2.52
16.93
3.86
3.07
18.58
4.65
3.46
20.24
5.28
3.86
21.89
5.43
2.7
8.3
4.5
0.2
0.4
351
4
7
10
13
19
26
39
54
64
87
89
118
127
152
163
201
214
254
269
304
335
8
14
19
26
38
53
71
99
124
170
173
237
246
320
331
410
423
516
531
655
686
Solid
(in.)
l1
0.750
0.938
1.188
1.625
1.813
2.125
2.250
2.375
2.875
3.250
3.375
3.750
4.125
Solid
(in.)
w1
5,000
5,000
5,000
5,000
5,000
5,000
4,900
4,250
3,800
3,400
3,000
2,750 1.73
2,450 1.85
Solid
(RPM)
d2
168
301
531
885
1,416
2,124
3,186
4,957
7,789
11,860
17,702
24,783
34,519
Solid
(lbs.-in.)
D1
Pin Hub (Parts 4 or 2 & 3) Lngth Reqd Distance
Bore
Hub Width Thru Bolt Betwn Hubs
Pilot
Max
OD @ OD Bore Clear min. max.
Does Not Apply
Type Size
BDS 66
BDS 76
BDS 88
BDS 103
BDS 118
BDS 135
BDS 152
BDS 172
BDS 194
BDS 218
BDS 245
BDS 272
BDS 305
HP/
100
RPM
0.2
0.4
0.8
1.4
2.2
3.3
5.1
7.9
12
18
28
38
55
d2
Flexible Hub (Part 1)
Nominal Max
Bore
Hub Width Cplg
Torque Speed Pilot Max
OD @OD OD
11
N-EUPEX Flexible Couplings
Shaft to Hub Fits
Table 12.1
Shaft to Hub Fits
Shaft
Tolerance
0
–0.0005
1⁄2
5⁄8
3⁄4
7⁄8
1
11⁄8
11⁄4
13⁄8
11⁄2
Tolerance
0
–0.0010
15⁄8
13⁄4
17⁄8
2
21⁄8
21⁄4
23⁄8
21⁄2
25⁄8
23⁄4
27⁄8
Clearance
Fit
Bore
Bore & Keyway Tolerances per AGMA 9002-A86
Interference
Fit
Bore
Tolerance Tolerance
0
–0.0005
+0.001
–0.0010
0.500
0.500
0.625
0.625
0.750
0.750
0.875
0.875
1.000
1.000
1.125
1.125
1.250
1.250
1.375
1.375
1.500
1.500
Tolerance
–0.0010
–0.0020
1.625
1.625
1.750
1.750
1.875
1.875
Tolerance
0
+0.0015
2.000
2.000
2.125
2.125
2.250
2.250
2.375
2.375
2.500
2.500
2.625
2.625
2.750
2.750
2.875
2.875
Nominal Keyway
Fraction
1⁄8
3⁄16
3⁄16
3⁄16
1⁄4
1⁄4
1⁄4
5⁄16
3⁄8
3⁄8
3⁄8
1⁄2
1⁄2
1⁄2
1⁄2
5⁄8
5⁄8
5⁄8
5⁄8
3⁄4
×
×
×
×
×
×
×
×
×
1⁄16
×
×
×
3⁄16
×
×
×
×
×
×
×
×
1⁄4
3⁄32
3⁄32
3⁄32
1⁄8
1⁄8
1⁄8
5⁄32
3⁄16
3⁄16
1⁄4
1⁄4
1⁄4
5⁄16
5⁄16
5⁄16
5⁄16
3⁄8
Clearance
Fit
Bore
Shaft
Decimal
0.1250
0.1875
0.1875
0.1875
0.2500
0.2500
0.2500
0.3125
0.3750
×
×
×
×
×
×
×
×
×
0.0625
0.0938
0.0938
0.0938
0.1250
0.1250
0.1250
0.1563
0.1875
Tolerance
0
–0.0010
3
31⁄8
31⁄4
33⁄8
31⁄2
35⁄8
33⁄4
37⁄8
0.3750 × 0.1875
0.3750 × 0.1875
0.5000 × 0.2500
4
41⁄4
41⁄2
43⁄4
×
×
×
×
×
×
×
×
5
51⁄4
51⁄2
53⁄4
6
61⁄4
61⁄2
63⁄4
0.5000
0.5000
0.5000
0.6250
0.6250
0.6250
0.6250
0.7500
0.2500
0.2500
0.2500
0.3125
0.3125
0.3125
0.3125
0.3750
Note: For shaft sizes 1⁄2" through 61⁄2", square keyways are preferred.
For shaft sizes over 61⁄2", rectangular keyways are preferred.
7
Smax
Interference
Fit
Bore
Tolerance Tolerance
0
–0.0015
+0.0015
–0.0030
3.000
3.000
3.125
3.125
3.250
3.250
3.375
3.375
3.500
3.500
3.625
3.625
3.750
3.750
3.875
3.875
Tolerance
–0.0020
–0.0035
4.000
4.000
4.250
4.250
4.500
4.500
4.750
4.750
Tolerance
–0.0025
–0.0040
5.000
5.000
5.250
5.250
5.500
5.500
5.750
5.750
6.000
6.000
6.250
6.250
6.500
6.500
6.750
Tolerance
–0.0030
–0.0050
7.000
Nominal Keyway
Fraction
1
×
×
×
×
×
×
×
×
1
1
1
11⁄4
×
×
×
×
1⁄2
11⁄4
11⁄4
11⁄4
11⁄2
11⁄2
11⁄2
11⁄2
13⁄4
×
×
×
×
×
×
×
×
5⁄8
3⁄4
1.2500
1.2500
1.2500
1.5000
1.5000
1.5000
1.5000
1.7500
13⁄4 ×
3⁄4
1.7500 × 0.7500
3⁄4
3⁄4
3⁄4
7⁄8
7⁄8
7⁄8
7⁄8
3⁄8
3⁄8
3⁄8
7⁄16
7⁄16
7⁄16
7⁄16
1⁄2
1⁄2
1⁄2
5⁄8
5⁄8
5⁄8
3⁄4
3⁄4
3⁄4
3⁄4
Smax
rK D
D Ka
wK
D
Smin
Axial misalignment
Figure 12.1
12
Smin
Angular misalignment
Figure 12.2
Decimal
Radial misalignment
Figure 12.3
0.7500
0.7500
0.7500
0.8750
0.8750
0.8750
0.8750
1.0000
×
×
×
×
×
×
×
×
0.3750
0.3750
0.3750
0.4375
0.4375
0.4375
0.4375
0.5000
1.0000
1.0000
1.0000
1.2500
×
×
×
×
0.5000
0.5000
0.5000
0.6250
×
×
×
×
×
×
×
×
0.6250
0.6250
0.6250
0.7500
0.7500
0.7500
0.7500
0.7500
N-EUPEX Flexible Couplings
Common Practices
N-EUPEX Couplings:
Assembly and Disassembly From Shafts:
Made of GG-25 (high quality) cast iron
A load up to three times the coupling’s nominal torque
rating is allowable for a short period of time (i.e. during
start-up, motor short circuit, etc.)
Ambient temperature range is between –22°F and
176°F.
N-EUPEX type A, D, P, and H couplings allow shafts and
machines to be assembled and dismantled without
disassembly of the power train.
N-EUPEX type A, ADS, D and P couplings require close
attention to dimension P in tables 6.1, 8.1 and 11.1. This
is the amount of space required to remove the bolts
during assembly/disassembly of parts 2 and 3.
Flexible Coupling Elements:
Standard N-EUPEX couplings have synthetic rubber
(Perbunan, Shore 80) flexible elements.
Applications involving reversing operations, very fast
acceleration rates or very high shock loads (i.e.
reciprocating pumps, reciprocating compressors, etc.)
can be supplied with oversize flexible elements (up to
and including size 200) to minimize torsional play.
Balancing:
Arrangement of the Coupling Parts:
Normally, the flexible element hub (part 1) is mounted on the
motor shaft and the pin hub (part 2 or 4) is mounted on the
driven shaft. However, this theory should be reversed when:
The flexible element hub is above the pin hub on a
vertical application
The driven shaft is abnormally short and prevents the
pin ring (part 3) from being fully withdrawn to allow
proper replacement of the flexible elements, etc.
N-EUPEX coupling hubs are balanced to AGMA class 8
in one plane, not taking the keyway into account. Upon
order, couplings can be balanced to AGMA class 9 in
two planes, if quieter operation is desired.
Spacer coupling (Type H) parts 5 and 7 are balanced to
AGMA class 9 in one plane; part 6 is balanced to AGMA
class 9 in two planes. (Note: Balancing to AGMA class 9
is only possible on coupling parts with finished bores,
stated operating speeds and specified with or without
the keyway cut.)
It must also be expressly stated if balancing is required
with a full parallel key.
Misalignment:
Misalignment may result from improper alignment during
assembly and/or forces generated by the drive train (i.e. heat
expansion, bent shafts, soft machine frame, etc.)
Bores:
Based on table 12.1, AGMA “shaft tolerances and bore fits”,
the following will be assumed unless otherwise specifically
stated:
Up to (and including) 4 inch bore will be provided with
a Clearance fit, (table 12.1) unless otherwise specified.
Over 4 inch bore will be provided with an Interference
fit, (table 12.1) unless otherwise specified.
Maximum bore diameters are based on using square
keystock.
Axial Misalignment:
Axial misalignment DKa (figure 12.1) is allowable within the
range between the maximum and minimum S1 / S2 dimension, (see tables 6.1 to 11.1).
Angular Misalignment:
Angular misalignment DKw (figure 12.2) is allowable within
the Maximum Misalignment for the size, (table 14.1).
Radial Misalignment:
Securing the Coupling:
N-EUPEX couplings are provided with parallel keyways according to the appropriate specification as follows:
Shaft to Hub Fits (per table 12.1) will apply.
One taped hole (with set screw included) will be located over the keyway, with the following exceptions:
Size 58 (part 1) ≥ 0.590 and (part 4) ≥ 0.708;
Size 68 (part 1) and (part 4) ≥ 0.787; Size 80 ≥ 0.984;
Size 95 ≥ 1.496; Size 110 ≥ (part 2) ≥ 1.181;
Size 125 (part 9) ≥ 0.787; and Size 140 ≥ 0.984 where the
tapped hole will be located away from the keyway.
Radial misalignment DKr (figure 12.3) is allowable within the
Maximum Misalignment for the size, (table 14.1).
Caution!
Both angular and radial misalignment may occur at the
same time. But, the total of both misalignments may not
exceed the maximum allowable value of either the angular
or radial misalignment.
Vibration Calculations:
Torsional vibration calculations can be supplied by Flender
upon request.
Flange-mounted Pulleys or Flywheels:
Check the allowable circumferential speeds of the flangemounted pulley or flywheel on an N-EUPEX type D or E.
Pulleys, etc. supplied by Flender are usually mounted
on an N-EUPEX flexible element flange (part 10).
Supporting the Shaft Ends:
The shaft ends, connected by the coupling, must be
supported directly in front of and behind the coupling.
Installing and Putting Into Service:
Refer to the installation instructions on page 14.
Questions:
Contact Flender with any question regarding N-EUPEX
couplings.
13
N-EUPEX Flexible Couplings
Installation
Installation:
Step 8:
Remove all N-EUPEX components from their packaging.
Loosely assemble the coupling on a convenient surface.
Check to confirm that all mating surfaces and parts are compatible (i.e. bores are correct and on the proper hub; there is
proper clearance for the assembly; the keystock matches the
keyways; all the coupling parts, flexible elements, etc. are at
hand; the proper assembly tools are available, etc.)
Check radial alignment by placing a ruler across the top of
the two coupling halves. Perform the appropriate adjustments to make the ruler level and in full contact with both
coupling halves.
Once aligned, check the amount of radial alignment offset. The amount of offset must not exceed the figure given
in the maximum misalignment chart (table 14.1).
Step 1:
Step 9:
Inspect all the coupling
components and remove any protective
coatings or lubricants
from the bores, mating
surfaces, fasteners, etc.
Caution: Before cleaning the coupling parts with solvents,
remove the flexible elements.
Check the angular alignment with a feeler gauge or dial
gauge. Measure the S1 dimension at various intervals
around the periphery of the coupling. Determine the maximum and minimum dimensions without rotating the coupling. The difference between the maximum and the
minimum must not exceed the figure given under in the
maximum misalignment chart (table 14.1). Make the appropriate adjustments as these measurements are made.
Step 2:
Step 10:
Remove any existing burrs, etc. from the shafts and/or mating surfaces.
Add the amount of radial misalignment (Step 8) and angular
misalignment (Step 9) of your coupling. The total must not
exceed the allowable maximum misalignment (table 14.1).
Step 3:
Use only recommended industry standards, keystock and
tools to mount the coupling hubs onto the shafts. Caution:
The shaft ends must not protrude beyond (through) the inside of the coupling hub.
When installing an N-EUPEX style A hub, remember to
install the pin ring (part 3) over the shaft first and insure the
bolt-in hub (part 2) is oriented properly. Remove the flexible
elements before the part is heated.
If the coupling parts are heated, do not exceed 300°F.
Step 4:
Secure the hub axially using a setscrew or an end plate with
shaft shoulder. When using a setscrew, it should be tightened with a hexagon socket head wrench (without using extensions). When an end plate is used, consult with Flender
regarding the recess in the coupling parts.
Table 14.1
Maximum Misalignment (inches)
Size
58
68
80
95
110
125
140
160
180
200
225
250
RPM
1200 1800
0.005
0.007
0.008
0.009
0.011
0.009
0.012
0.008
0.014
0.009
0.016 0.013 0.008
0.018 0.015 0.009
0.017 0.013 0.006
0.019 0.015 0.007
0.017 0.013 0.008
900
3500
0.005
0.004
0.004
0.005
0.005
0.004
0.004
0.004
0.005
Size
280
315
350
400
440
480
520
560
610
660
710
RPM
900 1200 1800 3500
0.019 0.014 0.009
0.016 0.010 0.008
0.018 0.012 0.009
0.020 0.013
0.015
0.016 0.013
0.018 0.014
0.019 0.015
0.021
0.018
0.019
Step 5:
Step 11:
After the hubs have been mounted and have cooled, replace
the flexible elements. NOTE: Make sure the flexible elements
are all the same size and have the same markings.
Before start-up, check the coupling for proper fit, (i.e. the
flexible elements are fully installed and flush with the hub
face, the set screws tightened to the proper torque, the alignment and S1 dimension, etc.) making corrections if necessary. Finally, assemble the coupling guard to prevent
accidental contact with the coupling.
Step 6:
Position the shafts with coupling hubs into the connected
position. Check the S1 dimension. When using type A, ADS,
D and P couplings, slide the pin ring (part 3) into position
and connect the two parts (using the screws provided) to the
prescribed torque.
Step 7:
Align the shafts to keep radial and angular misalignment as small
as possible. This will increase the service life of the coupling.
14
CAUTION: If irregularities are detected during operation, the
drive assembly should be shut off immediately. The cause
of the problem should be determined by using the Troubleshooting Table (section 9) of the Operating Instructions. If
the cause can not be determined and there is no repair
facility nearby, call Flender’s service group for the help of a
service technician.
N-EUPEX Flexible Couplings
Maintenance
Preventative Maintenance:
Storage Conditions:
Once the N-EUPEX coupling has been installed and put into
operation, a regular inspection interval and schedule should
be established to check the flexible elements for wear. This
schedule should be incorporated into your routine inspection schedule to insure the consistency of the inspection
process. However, the time period between inspections
should not exceed 1 year.
As with any elastomer or rubber material, N-EUPEX flexible
elements are subject to the effects of aging. They should be
stored in a dry, dust-free area. They should not be stored together with chemicals, solvents, fuels, acids, etc. Furthermore, they should be protected against light, especially
direct sunlight and strong artificial light with a high ultraviolet content (i.e. fluorescent, mercury-vapor, etc.). Additional factors that may impact the life or performance of the
flexible elements are exposure to oxygen, ozone, extreme
temperatures, moisture, etc. To maximize the service life, we
recommended that the inventory should continuously be rotated, with the oldest always being the first to be used.
With proper storage and application, N-EUPEX couplings
will provide many years of service and protection for your
machinery.
Flexible Element Wear:
The load of the application may create an indentation into
the flexible element we refer to as “torsional set”. Additionally, the amount of torsional set will vary, depending on the
size of the coupling. (On a size 58 coupling, the amount of
torsional set could be up to 1⁄4 of an inch deep. The larger the
coupling, the larger the torsional set will be.)
The torsional set does not affect the performance of the
coupling. It is simply the material reacting to the stress of
the load. However, a very large torsional set may suggest a
sizing problem and warrant additional analysis of the application.
Normal wear of the flexible elements will begin to eat away the material of the flexible element. This will
result in a visible reduction of the flexible element. When half of the flexible
element’s compressed side (ref. the
red line shown in figure 15.1) has
Figure 15.1
been worn away, the elements should
be replaced.
Flexible Element Replacement:
Limitations:
Although the Flender N-EUPEX coupling is designed for
most general purpose coupling applications, there are certain limitations that should be considered:
Temperatures: Over +176°F, and/or below –22°F. A combination of high temperature and high humidity will reduce the
life and performance of the coupling.
Chemical Environment: Life of the flexible elements are
greatly impacted by different chemicals in various ways. A
chart of chemical compatibility can be supplied upon request.
For further details, contact the appropriate Flender
office.
If a small amount of circumferential backlash is acceptable
for the application, the flexible elements do not need to be
replaced until they are worn as described above.
In critical applications, the flexible elements should be
replaced at regular intervals. The frequency of replacement
intervals will depend on the severity of the application and
environmental conditions. The service life of the flexible
elements can vary depending on many conditions (i.e.
ultraviolet light, chemicals, extreme temperature, abrasives, etc.). If the coupling is properly sized and the flexible
elements stored and operated under normal conditions, it
will provide many years of optimal performance.
Caution! The flexible elements should only be changed
in sets. Individual flexible elements with the same color coding should be used within each set.
15
Couplings – Proven Performance Since 1899
DISC
GEAR
ELASTOMER
Coupling
Description
FLUID
Radial
Angular
Axial
Max.
RPM
Max.
Bore
Claw Type
1
2
4
120 – 32,750
5,000
4.330”
N-EUPEX®
Pin Type
Fail-safe and
Non Fail-safe
3
3
4
169 – 548,760
5,000
10.236”
RUPEX®
Flexible
Pin & Bush
2
3
4
1,770 – 11,506,300
5,000
25.196”
ELPEX®
Highly
Flexible
4
4
4
14,100 – 796,590
6,800
12.600”
ELPEX-B®
Highly
Flexible
4
4
4
213 – 128,339
4,500
7.480”
ELPEX-S®
Highly Flexible for
Non-Uniform
Loads
4
4
4
2,930 – 557,500
4,200
10.236”
ZAPEX-ZI®
International
Grease
Lubricated
3
3
4
7,500 – 1,106,375
8,500
10.866”
ZAPEX-ZW®
Heavy Duty
Oil
Lubricated
3
3
4
11,500 – 63,727,200
9,400
35.826”
ARPEX® ARS
Standard
Series
No Backlash
3
3
3
1,500 – 938,000
13,400
11.023”
ARPEX® ARP
– NAN
– MECEM
Pumps
API 610
and 671
3
3
3
1,680 – 106,200
1,860 – 150,500
21,700
19,900
5.905”
9.055”
ARPEX® ARC
High
Torque
Series
3
3
3
495,000 – 12,800,000
5,000
19.291”
Fluid
Coupling
3
3
4
95 – 136,000
3,550
w/ N-EUPEX
*Amount of permissible misalignment
1 = relatively small
2 = modest
3 = moderate
4 = largest
3.937”
7.480”
For additional non-standard designs, consult with Flender.
CORPORATION
950 Tollgate Road
Elgin, IL 60123-9397
Phone: 847-931-1990
K 420 EN 2002-11-USA
Nominal Torque
Range (in.-lbs.)
BIPEX®
FLUDEX®
USA
Permissible Misalignment
Toll Free 800-867-3766
Website: www.flenderusa.com
E-mail: [email protected]
CANADA
POWER TRANSMISSION Inc.
215 Shields Court, Units 4-6
Markham, Ontario L3R 8V2
Toll Free 877-896-2223
Website: www.flenderpti.com
E-mail: [email protected]