the application guide now.

Transcription

1104 Highway 27 W
Alexandria, MN 56308
800-253-7940
www.itwheartland.com
APPLICATION GUIDE
A certified leader in precision engineered
machines, parts, gears, and electro-mechanical
products for over 30 years.
Table of Contents
• HTSR™ – High Torque to Space Ratio
•Spiroid and Helicon
- Gear Form............................................................... 2
- Spiroid vs Helicon................................................... 3
• Key Characteristics and Benefits
-
-
-
-
-
-
-
-
Instantaneous Line of Contact................................ 4
Simultaneous Tooth Contact................................... 5
Materials Selection and Versatility.......................... 5
Strength and Durability........................................... 5
Ratio Flexibility........................................................ 5
Quiet Operation....................................................... 6
Efficiency................................................................. 6
Hi Side / Low Side................................................... 7
•Spiroid and Helicon Fill the Design Gap...... 7
•Application Data
-
-
-
-
Spiroid Data Factors.......................................... 8-11
Spiroid Charts.................................................. 12-19
Helicon Data Factors....................................... 20-23
Helicon Charts................................................. 24-31
•Assembly and Installation
-
-
-
-
-
Housing Inspection............................................... 32
Pinion Assembly.................................................... 32
Gear Assembly...................................................... 33
Backlash Check.................................................... 34
Backlash Chart...................................................... 34
•Application Data Sheet..................................... 35
•Other ITW Products and Services........... 36-37
HTSR™ (High Torque to Space Ratio) is an exclusive line of gearing and coupling products made
possible by software, tooling, and manufacturing methods that are the intellectual property of Illinois
Tool Works and ITW Heartland. As the acronym indicates, the real value of these products lay
in their ability to transmit relatively large amounts of power in compact spaces and with minimal
weight.
Rather than modifying an application to the limited capability of a particular “standard” gearing
method, HTSR™ Gearing is designed to meet some of the most difficult application requirements
that exist in the Aerospace, Defense, Robotics, Medical, and General Industrial markets. In fact,
HTSR™ products have been meeting these difficult application requirements for over 50 years.
Simply put, there are times when traditional gearing methods simply will not provide the power and
torque that are required within given space or weight limitations. It is in these times that HTSR™
products will rise to the occasion.
The following represent the HTSR™ Gearing product profile:
• Spiroid right angle gearing
• Helicon right angle gearing
• Concurve spur-type gearing
• Endicon indexing and coupling rings
This application guide will focus exclusively on Spiroid and Helicon right angle gearing.
2
www.ITWHeartland.com
Spiroid® & Helicon®
Gear Form
Spiroid and Helicon gears are members of the skew-axis
gear family and are designed to broaden gearing design
opportunities restricted by the physical limitations of conventional gearing.
Spiroid and Helicon gear sets consist of two members;
pinion and gear. By definition, the pinion has fewer teeth
and is normally the driving member while the driven
member is a face gear. Spiroid and Helicon pinions
operate between the extreme operating positions of
bevel gear pinions and worms. See Figure 1. The
advantages of Spiroid gears stem from two facts. First,
Spiroid/Helicon gears have more teeth in contact than a
worm drive of equal gear diameter. See Figures 2 and
3. Secondly, in contrast to worm, hypoid, and spiral bevel
gears, Spiroid/Helicon gears are insensitive to normal
mounting variations.
WORM
Direction of
sliding velocity
band of contact
ROTATION OF PINION
Radius of curvature
WORM
SPIROID
Spiroid vs. Helicon
The difference between Spiroid and Helicon
can be found in their respective pinions.
Whereas Helicon pinions are cylindrical and
typically engaging a flat-faced gear, Spiroid
pinions are tapered and designed to engage a
beveled gear face. See Figure 4.
Since tapered Spiroid pinions engage the
hypotenuse of a beveled face gear and thus
allow for more thread/tooth contact, Spiroid
gear sets typically allow for greater torque
output with slightly less efficiency than its
Helicon equal.
GEAR
TOOTH
DIRECTION
COMPONENT OF
NORMAL FORCE
r
PINION
TOOTH
NORMAL
FORCE
Friction
FORCE
R
NORMAL
FORCE
MOTION OF
PINION TOOTH
ROTATION
OF GEAR
COMPONENT OF
FRICTION FORCE
Figure 3
ITW
SPIROID GEAR
WORM GEAR
SPIROID/HELICON GEAR
ITW
HELICON GEAR
Spiroid – Acute Shaft Angle
Spiroid – 90˚ Shaft Angle
HYPOID
GEAR
SPIRAL
BEVEL
GEAR
Helicon – 90˚ Shaft Angle
Helicon – Acute Shaft Angle
Figure 4
Figure 1
3
Key Characteristics and Benefits
Instantaneous Line of Contact
Before describing specific Spiroid and Helicon gear set
characteristics, it should be pointed out that all gears can,
at best, obtain only line contact under no load at any instantaneous position of mesh. Total length of line contact
is one criterion of gear load carrying capabilities. Another
is contact line movement during the engagement cycle.
The contact line should not be stationary. It should sweep
the entire available tooth surface. Movement or sweep of
contact line brings freshly lubricated and cooler areas into
mesh. This applies to all gears. Other factors, such as
relative curvature of contacting surface and inclination of
the contact lines relative to sliding velocity, must also be
considered.
In Spiroid and Helicon pinions, the line of instantaneous
contact is an almost radial line on each convolution of the
pinion thread. See Figure 5. It is almost perpendicular to
the sliding velocity, and results in a full sweep of contact
on the pinion and gear. By contrast, the instantaneous
line of contact on worm gears is only slightly inclined to the
direction of sliding velocity. This results in a narrow band
of contact on the worm thread. See Figure 3 on page 3.
4
Contact lines of
spiroid pinion and gear
Figure 5
Simultaneous Tooth Contact
Furthermore, Spiroid and Helicon
gears have many teeth in
simultaneous contact. See
figure 5 on page 4. The
number of teeth in contact
depends on the number of
teeth in the gear member.
Generally, 10% of the gear
teeth are in simultaneous
contact. However, even in
the low ratio range, Spirod and
Helicon have two to three times the
number of teeth in contact than on
worm gears. On higher ratios, there are
many times more.
Materials Selection and Versatility
The more favorable contact conditions and lower sliding between Spiroid and Helicon gear
members permit the use of hardenable grades of steel for both gears and pinions. This, plus the
ideal lubricating film formation and the movement of contact lines, makes the use of hardened steelon-steel an ideal material for both Spiroid and Helicon gear sets. This is particularly advantageous
in situations where high surface durability, high static loads, running loads, or shock loads are
encountered. In worm gears, by contrast, the usual selection is hardened steel worm meshing with
a bronze gear.
Strength and Durability
Givin all of the previously mentioned characteristics, it is clear that many factors combine to give
Helicon or Spiroid gears their superior strength and high surface
durability characteristics. These factors are:
• The number of teeth in simultaneous contact
•The individual contact lines in relation to the sliding velocity
• Large radii of curvature at the contact lines
• Greater latitude of material choices
Ratio Flexibility
For any gear of a given diameter, a higher ratio means more teeth – which means a finer pitch.
Since contact between the Helicon or Spiroid pinion and gear extends over the entire length of the
pinion, a finer pitch or shorter lead gives a proportionately increased number of teeth in simultaneous contact, with very little sacrifice in capacity. With worm gears, for instance, the upper ratio limit
is usually around 80:1. After selecting a pitch sufficient to carry the required load (bearing in mind
that, at most, the worm set has two teeth in contact) the gear risks becoming too large. Therefore,
in the case of worm gearing, higher ratios are usually handled by multiple reductions.
Helicon or Spiroid gears, however, do not have an upper limitation. For a given gear diameter,
a higher ratio means a shorter lead, finer pitch, and more teeth in contact. As a result, single
reduction ratios above 300:1 are possible.
5
Key Characteristics and Benefits
cont.
Quiet Operation
Gear accuracy is the most important factor in obtaining minimal vibration and maximum quietness.
However, at high pitch line velocities even small inaccuracies can produce a pronounced noise,
particularly if they occur at regular frequencies. Therefore, to achieve quiet gears, accuracy is
combined with modifications in the profile and lead of the gear teeth, permitting them to engage
gradually. It was previously pointed out that the contact lines on Spiroid and Helicon pinions are
nearly radial, and sweep the entire length of the teeth. At such great tooth length, very effective
modifications can be made at the entering and leaving sides, so that pinion teeth “cam” gently into
and out of action. The commonly used term for these modifications is “crowning.” Incorporated
in either the pinion or the gear, and in conjunction with the large number of teeth in simultaneous
engagement, it accounts for the fact that Spiroid and Helicon gears are inherently quiet.
Efficiency
The efficiency of a gear set is a measure of the power lost in the gear mesh which turns into heat
that must be dissipated. Thus a gear set which is 70% efficient loses 30% of the power input and
transmits 70%. The efficiency of Spiroid and Helicon gear sets, as well as all other gear types, is a
function of the gear set geometry, i.e. the efficiency angles, and the coefficient of friction.
Because of the previously stated geometry and ideal lubricating characteristics of Spiroid and
Helicon gear sets, higher efficiencies are possible relative to worm gears.
As with all other gear types, the higher the gear set ratio, the lower the efficiency. Sometimes,
however, the low efficiency can be an asset, particularly when “self-locking” is desired. Self-locking
is the ability of the gear to drive the pinion, or back drive, and is a characteristic common to higher
ratio gear sets.
Special design considerations can accommodate application requirements of higher dynamic efficiencies or self-locking efficiencies through the custom design versatility of Spiroid or Helicon
gearing.
Hi Side / Low Side
Spiroid and Helicon tooth pressure angles are not
symmetrical. See Figure 6. However, Spiroid and Helicon
gearing operate at roughly the same efficiency and load
rating in either direction of pinion rotation even though
direction and magnitude of the forces on the teeth are
different. While the resultant tooth forces are largely in the
axial direction of the pinion (particularly in the higher ratio
range) they also have components working in the radial
direction of the pinion, which tend to separate the pinion and
gear teeth. The radial component is greater when the high
pressure angle of the tooth does the driving. See description
of “Tooth Load Components” given in the Helicon & Spiroid gear set size selection sections.
Modern engineering attempts to extract the most from any given opportunity. Therefore, it is
preferable in the interest of maximum bearing life to let the low pressure angle side of the pinion
threads do the driving on uni-directional drives.
6
Spiroid® and Helicon® Fill the Design Gap
There are definite applications for both parallel axis and skew-axis gear systems. Selection depends
on many factors including cost, space and power availability, ratio and torque requirements, as well as
production or assembly limitations.
Spiroid and Helicon gear systems offer increased design opportunities with these important
obtainable features:
•
Simple and positive control of backlash
•
Ease of assembly / flexible mounting tolerances
•
High level of accuracy
•
Wide range of reduction ratios
•
Superior shock strength
•
Superior torque transmission
•
Quiet operation
•
Material versatility
•
Compact, lightweight drives
•
High stiffness
•
Savings due to design flexibility
7
Application Data
POSITION ONLY
Spiroid Data Factors
This section includes tables for gear set performance, pertinent dimensions and tooth loads.
Standard design data for Spiroid gear sets is given in Tables represented on pages 12 - 19 . These
gear sets are well-balanced designs suitable for the majority of general purpose applications.
The tables are design tools to be used as a guide to allow the engineer to make preliminary size
selection of a Helicon gear set. The gear sets listed in the table do not represent standard “off-theshelf” hardware.
By varying both tooth and blank proportions, it is possible to place special emphasis on such specific performance characteristics as efficiency, self-locking, reversibility, high strength, exceptionally
smooth angular velocity, etc. The design possibilities featuring and blending the various characteristics are, therefore, quite numerous.
In making a size selection, apply the material and service factors from Tables A and B. Divide catalog ratings or multiply driven load by appropriate service and material factors. Then, select the gear
set with the proper rating for the given input speed and ratio requirements.
If a gear set is desired which falls in between two standard sizes, take the data from the closest set
and scale all linear dimensions either up or down as needed.
For special designs requiring particular performance characteristics or additional sizing options,
please contact ITW Heartland representatives.
Spiroid Gear Tooth Load Components
When selecting bearings, it is necessary to know the direction and magnitude of the tooth forces so
that bearing relations may be determined. The rating tables give the following unit tooth loads for all
Helicon gear sets:
Fx – unit axial force acting on pinion
Fy – unit separating force acting on pinion
Fz – u
nit tangential force acting on pinion
(Units for above forces are pounds/inch-pound output torque)
1. Hi-Lo side forces are shown acting on the gear.
2.Forces act on the gear tooth at mid-tooth depth and at mid-face on the center distance.
3.Forces on the pinion are in the reverse direction from those shown.
Tooth load components equals lbs./inch-lb. output torque
Note: Additional reduction ratios may be possible depending on application parameters
8
Table 8
XX
Engine
10 hours per day
1.50
1.75
2.00
24 hours per day
1.75
2.00
2.25
Materials
Helicon gear set size data tables are based on the
following material combinations:
Rating adjustment factors for gear materials other than steel mating with a hardened pinion.
Lubrication
For steel-on-steel applications, full
synthetic extreme pressure oil is
recommended. For cases where
normal shock-free service is expected, SAE grade 90 should be used.
For cases where heavy duty or high
shock loading is expected, SAE
grade 140 should be used.
For steel-on-bronze applications, full
synthetic extreme pressure oil that is
rated for usage with enclosed worm
drives operating at medium to high
speeds is recommended.
Note: oil fill level should cover the
gear set mesh
Service Factor
Horsepower and torque ratings are
based on a unity service factor (1.0)
as defined the table to the right.
The ratings given in the tables are
surface durability capacities and do
not take into account any thermal
limits.
Temperature
GEAR
ONLY
MATERIAL
1. F
or gear O.D. less than 16”: Both
pinion and gear are SAE 8620 Steel,
carburize hardened to 60 R.C.
Powdered Iron Alloy Sintered and Hardened
.65
Molded Plastics
.25
Aluminum Bronze
.80
Die Cast Aluminum
.35
Shell Molded Ductile Iron
.40
Driven Machine
Load Classiﬁcations
Prime Mover
Duration of Service
Uniform
Moderate
Shock
Heavy
Shock
Electric Motor
Occasional 1/2 hr./day total
0.80
0.90
1.00
(Normal service)
Intermittent 2 hr./day total
0.90
1.00
1.25
10 hours per day
1.00
1.25
1.50
24 hours per day
1.25
1.50
1.75
0.90
1.00
1.25
Electric Motor
(More than 10
1.00
1.25
1.50
starts per hour)
10 hours per day
1.25
1.50
1.75
24 hours per day
1.50
1.75
2.00
Multi-Cylinder
0.90
1.00
1.25
Internal Combustion
1.00
1.25
1.50
Engine
10 hours per day
1.25
1.50
1.75
24 hours per day
1.50
1.75
2.00
Single Cylinder
1.00
1.25
1.50
Internal Combustion
1.25
1.50
1.75
Engine
10 hours per day
1.50
1.75
2.00
24 hours per day
1.75
2.00
2.25
MATERIAL
The maximum sustained operating oil sump temperature should not exceed 180°F.
Oil level should cover gear set mesh.
GEAR
ONLY
.65
Molded Plastics
.25
Aluminum Bronze
.80
Die Cast Aluminum
.35
.40
9
1.875" Outside Diameter – Helicon
Gear Ratio Details
Spiroid Gearing Selector
Helicon APOSITION ONLY
Diagram
POSITION ONLY
1.875 " OD
The basic dimensional parameters of Spiroid and Helicon gear sets shown in Diagram A relate to gear and pinion interface. Center
distance
andSpeed
pinion thread diameter specifications
ITW Heartland
Ratio to 1 Input
Output to4be guides,
6
8and can
10 be12found
14in the
17 bottom
21 sections
25
31of the
38 charts
47 located
58
RPMintended
are
on
pages 12 - 19. Pinion and gear mounting distances are flexible, and can be specified
depending on application requirements.
Performance Ratings - 1.875" O.D. Helicon
RPM
Output
Diagram
HP OutB
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
.001
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1
TQ Out
129
128
165
169
167
178
232
229
246
228
225
241
238
Loading
vectors
are.841
indicated
in.738
Diagram
B.640
by the
directional
arrows.
Load
multiplier
facEfficiency
.893
.791
.684
.574
.524
.478
.403
.359
.312
.272
tors canHPbe
the bottom
sections
the charts
located
on pages
12 - 19.
Out found
.044 in.029
.028
.023
.019 of .017
.018
.014
.013
.010
.008
.007 Note
.005 that
100
TQ Out
115
113
146
147
145
153
198
195
209
191
189
202
199
there
are
typically
differences
in
load
factors
between
low
side
and
high
side
drive.
Efficiency
.914
.872
.833
.788
.741
.702
.643
.594
.549
.475
.429
.378
.332
200
300
600
900
1200
1750
2500
3600
6000
10000
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.084
108
.921
.120
104
.926
.219
94
.934
.306
88
.939
.386
83
.943
.517
76
.948
.676
70
.952
.878
63
.957
1.243
54
.962
1.721
44
.967
.055
106
.833
.079
102
.889
.143
92
.902
.200
86
.909
.251
81
.915
.336
74
.922
.437
67
.928
.566
61
.935
.798
51
.943
1.100
42
.951
.053
137
.846
.076
131
.855
.137
118
.872
.191
110
.882
.240
103
.889
.320
94
.898
.415
86
.907
.535
77
.915
.751
65
.926
1.031
53
.936
.043
138
.805
.061
131
.815
.110
118
.836
.152
109
.848
.190
102
.857
.253
93
.868
.327
85
.879
.421
76
.890
.587
63
.903
.803
52
.916
.035
135
.761
.050
129
.773
.089
115
.797
.123
106
.812
.153
99
.822
.203
90
.836
.262
81
.849
.336
73
.862
.467
60
.879
.635
49
.894
.031
143
.723
.044
136
.737
.079
121
.763
.109
111
.780
.135
104
.791
.179
95
.807
.231
85
.822
.295
76
.836
.409
63
.856
.556
51
.873
.033
184
.667
.047
174
.683
.084
154
.713
.115
141
.732
.143
132
.746
.189
119
.764
.242
107
.781
.309
95
.798
.426
78
.821
.575
63
.824
.027
181
.619
.038
171
.636
.067
152
.669
.092
139
.689
.115
130
.708
.151
117
.724
.194
105
.743
.246
93
.762
.339
77
.788
.457
62
.812
.024
193
.575
.034
183
.593
.060
162
.626
.083
148
.648
.103
138
.664
.135
124
.686
.173
111
.706
.220
98
.727
.301
81
.755
.405
65
.782
.018
176
.502
.025
166
.521
.045
146
.556
.061
133
.580
.076
123
.597
.099
110
.621
.126
98
.643
.159
86
.667
.217
71
.699
.289
56
.729
.015
174
.455
.021
164
.473
.036
144
.509
.049
131
.533
.061
121
.550
.079
108
.575
.100
96
.598
.127
84
.623
.172
69
.657
.229
55
.690
.013
186
.403
.018
175
.421
.031
153
.456
.042
138
.479
.052
128
.497
.067
114
.522
.086
101
.546
.108
89
.571
.146
72
.607
.193
57
.642
.010
183
.356
.014
172
.373
.025
150
.406
.033
136
.429
.041
125
.447
.053
111
.471
.067
98
.495
.084
86
.521
.114
69
.557
.150
55
.594
0.305
0.589
20
35
0.400
0.486
20
33
0.536
0.466
15
33
0.536
0.463
15
33
0.536
0.473
15
33
0.536
0.457
15
30
0.536
0.502
10
30
0.536
0.470
10
30
0.536
0.457
10
28
0.536
0.516
10
30
0.536
0.482
10
30
0.536
0.463
10
28
0.536
0.439
10
28
1.135
1.079
0.768
1.143
0.641
0.818
1.138
1.042
0.636
1.139
0.512
0.699
1.225
1.004
0.552
1.229
0.462
0.614
1.290
0.992
0.489
1.297
0.441
0.550
1.332
0.905
0.448
1.336
0.427
0.510
1.390
0.915
0.385
1.398
0.298
0.451
1.409
0.895
0.381
1.423
0.288
0.428
1.436
0.818
0.354
1.445
0.283
0.404
1.465
0.900
0.331
1.483
0.283
0.369
1.474
0.891
0.333
1.496
0.280
0.353
1.493
0.811
0.317
1.510
0.278
0.337
1.501
0.806
0.317
1.520
0.277
0.325
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
1.065
1.240
0.890
1.083
0.689
0.944
Note:
reduction
ratiosreference
may be possible
depending
on application
Note: Additional
Data intended
for general
purposes
only and may
change asparameters
application parameters become further defined
10
Table 8
XX
C Dia
a
Pinion od
F Dia max
Diagram A
FZ - LO
FZ - LO
Tooth lo p.a.
FY - LO
hi side drive
FX - HI
FX- HI
FZ - HI
FZ - HI
LO side drive
hi side drive
LO side drive
Diagram B
11
1.875" Outside
Diameter
1.500" O.D.
Spiroid – Helicon
Spiroid Gearing
Performance Ratings
- Selector
1.875 " OD
POSITION10:1
ONLY 12:1
Output
Helicon
RPM
14:1
17:1
21:1
25:1
POSITION
ONLY47:1
31:1
38:1
HP Out
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
ITW
Heartland
Ratio to 129
1 Input Speed
TQ Out
92
95
121
121
128
138
136
Output Efficiency
4
6 .690 8 .639 10 .60212 .542
14
17
21
RPM
.491
.451 25 .376 31 .33638
HP Out
.013
.011
.011
N/A
.008
.007
.006
.005
100
TQ Out
81
83
105
104
111
110
118
116
Efficiency
.747
.702
.668
.612
.562
.522
.447
.403
" O.D. .025
Performance
Ratings
1.875.021
Helicon
HP Out
.023 - .020
.015
.013
.011
.009
200
TQ
Out
76
77
98
97
103
103
109
RPM Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1
31:1 107
38:1
Efficiency
.766
.723
.690
.637
.588
.548
.474
.429
HP Out HP
.001Out N/A.034 N/A.028 N/A .030N/A .045
N/A
N/A
N/A
.022
.018 N/A.016 N/A .013N/A
1
TQ Out
129
232
229
300
TQ
Out 12872 165 74 169 93 167 92178
98
97 246 103 228 101225
Efficiency
.893
.841
.791
.738
.684
.640
.574
.524
.478
.403
.359
.779 .028.737 .023 .705.019 .653
.605
.565 .013.492.010 .447
HP Out Efficiency
.044
.029
.017
.018
.014
.008
.039
.032 209.028 191 .022189
100
TQ Out HP
115Out 113.060 146.051 147 .054145 .062
153
198
195
600
TQ
87
87 .549 91 .475 89.429
Efficiency
.914Out .87265 .833 66 .788 84 .741 82
.702
.643
.594
HP Out Efficiency
.084
.055
.031
.033
.027
.015
.802 .053.764 .043 .734.035 .685
.639
.600 .024.528.018 .483
200
TQ Out HP
108Out 106.084 137.071 138 .075135 .077
143
184
181
.053
.045 193 .038 176 .031174
.723
.667
.619
Efficiency
.921Out .83360 .846 61 .805 77 .761 76
900
80
80 .575 83 .502 81.455
TQ
HP Out
.120
.079
.076
.061
.050
.044
.047
.038
.034
.025
.021
.817
.780
.752
.705
.660
.622
.552 166 .506164
Efficiency
300
TQ Out
104
102
131
131
129
136
174
171
183
.105 .855.088.815 .094.773 .102
.066
.056 .593.047.521 .038
Efficiency HP
.926Out .889
.737
.683
.636
.473
1200
75
74 .060 77 .045 76.036
HP Out TQ
.219Out .14357 .137 57 .110 72 .089 71
.079
.084
.067
600
TQ Out Efficiency
94
92.827 118.792 118 .765115 .720
121
154
152
.676
.639 162 .570 146 .524144
Efficiency HP
.934Out .902
.763
.713
.669
.509
.140 .872.117.836 .124.797 .131
.087
.073 .626.062.556 .050
HP Out TQ
.306Out .20052 .191 52 .152 66 .123 64
.109
.115
.092
1750
68
67 .083 69 .061 68.049
900
TQ Out
88
86
110
109
106
111
141
139
148
133
131
.840
.808
.782
.739
.697
.661
.594
.548
Efficiency
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
.648
.580
.533
.181 .240.151 .190 .160.153 .167
.112
.094 .103.079.076 .063
.135
.143
.115
.061
HP Out HP
.386Out .251
2500
58104
61
1200
TQ Out TQ
83Out 81 47 103 47 102 59 99
132
13060
138 62 123 61121
.853 .889.822 .857 .798.822 .757
.717
.682 .664.617.597 .572
Efficiency Efficiency
.943
.915
.791
.746
.708
.550
HP Out HP
.517Out .336
.179
.189
.151
.079
.233 .320.194 .253 .205.203 .231
.143
.120 .135.101.099 .080
1750
TQ Out TQ
76Out 74 42 94 42 93 53 90
119
11753
124 55 110 53108
3600
5195
54
Efficiency
.948
.922
.807
.764
.724
.575
.866 .898.837 .868 .814.836 .776
.738
.704 .686.641.621 .598
Efficiency
HP Out
.676
.437
.415
.327
.262
.231
.242
.194
.173
.126
.100
.198
.165 111.138 98 .11096
2500
TQ Out HP
70Out 67.325 86 .270 85 .28681 .313
85
107
105
6000
45
44 .706 45 .643 44.598
TQ
Efficiency
.952Out .92835 .907 35 .879 44 .849 42
.822
.781
.743
.766
.734 .220.675.159 .633
.882 .535.856.421 .836.336 .801
HP Out Efficiency
.878
.566
.295
.309
.246
.127
3600
TQ Out HP
63Out 61.445 77 .368 76 .38973 N/A
76
95
93
.268
.223 98 .185 86 .14684
.762
Efficiency TQ
.957Out .93529 .915 29 .890 36 .862 35
.836
.798
10000
36
36 .727 36 .667 35.623
HP Out Efficiency
1.243
.798
.751
.587
.467
.409
.426
.339
.172
.897
.874
.856
.824
.792
763.000 .301.707.217 .667
1
6000
10000
TQ Out
54
51
Efficiency
.962
.943
HP Out 1.721
1.100
TQ Out
44
Dimension
Data42
Efficiency
.967
.951
65
.926
1.031
53
.936
63
.903
.803
52
.916
60
.879
.635
49
.894
63
.856
.556
51
.873
78
.821
.575
63
.824
0.463
15
33
0.473
15
33
0.457
15
30
0.502
10
30
Center Distance 0.500 0.500 0.500 0.500 0.500
Pinion Diameter 0.455 0.464 0.452 0.477 0.457
Dimension
Data
15
15
10
10
10
Pressure
Angle - Lo
CenterPressure
Distance Angle
0.305- Hi 0.40035 0.536 35 0.536 350.536 35
0.536
0.536
33
TQ equals output torque in inch-lbs
0.486
Pinion Diameter 0.589
Pressure Angle
- Lo Load
20 Data
20
Tooth
Pressure Angle - Hi
35
33
0.466
15
33
Fx 1.472 1.516 1.536
Driving Side Hi Fy 1.304 1.262 1.220
Fz 0.633 0.575 0.560
Tooth Load Data
1.5861.138
1.6351.2251.654
Fx 1.065 Fx 1.135
1.290
Driving
Side Lo
Driving Side
Hi Fy
1.240 Fy 1.079
0.992
0.6641.042
0.6221.0040.443
Fz 0.890 Fz 0.768
0.489
0.6300.636
0.5680.5520.543
Driving Side Lo
Fx
Fy
Fz
1.083
0.689
0.944
1.143
0.641
0.818
1.139
0.512
0.699
1.229
0.462
0.614
1.297
0.441
0.550
1.580
1.221
0.499
1.699
1.332
0.905
0.423
0.448
0.491
1.336
0.427
0.510
1.614
1.122
0.451
1.721
1.390
0.915
0.406
0.385
0.455
1.398
0.298
0.451
77
.788
.457
62
.812
81
.755
.405
65
.782
71
.699
.289
56
.729
69
.657
.229
55
.690
0.470
10
30
0.457
10
28
0.516
10
30
0.482
10
30
N/A
143
47
.293
.004
121
.356
.008
112
47:1
.380
N/A
.011
241
106
.312
.397
.007
.019
202
93
.378
.013
.432
186
.026
.403
85
.018
.455
175
.032
.421
79
.031
153
.473
.456
.042
.042
71
138
.497
.479
.053
.052
63
128
.522
.497
.067
.067
114
55
.522
.547
.086
.091
101
45
.546
.584
.108
89
.121
.571
36
.146
.620
1.423
0.288
0.428
1.445
0.283
0.404
1.483
0.283
0.369
1.496
0.280
0.353
58:1
72
.607
.193
57
.642
N/A
238
.272
.005
199
.332
.010
183
.356
.014
172
.373
.025
150
.406
.033
136
.429
.041
125
.447
.053
111
.471
.067
98
.495
.084
86
.521
.114
69
.557
.150
55
.594
0.463
10
28
0.536
0.439
10
28
1.510
0.278
0.337
1.501
0.806
0.317
1.520
0.277
0.325
0.500
0.500 0.500 0.500
0.438
0.497 0.467 0.449
10
10
10
10
0.536
0.536
33 0.536 33 0.536 330.536 30
1.620
1.671 1.667
1.095
1.138 1.104
0.462
0.359 0.400
1.735 1.436
1.7771.4651.785
1.409
1.474
0.895
0.9000.382
0.891
0.394 0.818
0.390
0.381
0.3310.371
0.333
0.431 0.354
0.389
58
1.692
1.021
0.354
1.795
1.493
0.811
0.377
0.317
0.354
Note: Rating Note:
and reduction
Data intended
data provided
for general
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
change
canas
provide
application
recommendations
parameters become
for specific
further
application
defined needs.
12
Table 8
XX
1.875" O.D. Spiroid
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
Output
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
N/A
177
.698
.024
153
.758
.044
142
.778
.063
135
.791
.112
121
.814
.155
111
.828
.193
104
.838
.255
94
.852
.328
85
.864
.419
75
.876
.581
63
.891
.789
51
.905
N/A
183
.647
.020
157
.714
.037
146
.736
.053
138
.750
.095
123
.777
.130
113
.790
.162
105
.805
.214
95
.821
.275
85
.835
.350
76
.490
.484
63
.867
.655
51
.884
N/A
0
.605
.018
167
.676
.034
155
.699
.048
147
.715
.085
131
.744
.117
120
.762
.145
112
.775
.191
101
.792
.245
91
.808
.312
80
.824
.430
66
.845
.581
54
.864
N/A
233
.551
.018
198
.626
.033
184
.652
.047
173
.669
.083
153
.701
.114
140
.721
.142
130
.736
.186
117
.755
.238
105
.773
.302
93
.791
.415
76
.815
.558
62
.836
N/A
249
.500
.016
211
.577
.029
195
.603
.041
184
.622
.072
162
.656
.099
148
.678
.122
138
.693
.160
124
.714
.204
111
.734
.259
98
.754
.355
80
.781
.477
65
.806
N/A
249
.460
.013
211
.536
.024
195
.564
.034
184
.582
.060
162
.618
.083
148
.641
.102
138
.657
.134
123
.679
.171
110
.701
.217
97
.722
.297
79
.751
.397
64
.778
N/A
269
.384
.011
225
.462
.021
207
.490
.030
194
.509
.052
170
.547
.071
154
.571
.088
142
.589
.114
127
.614
.145
113
.637
.182
99
.661
.248
81
.694
.329
64
.725
N/A
264
.344
.009
221
.417
.017
203
.445
.024
191
.464
.042
167
.501
.057
151
.526
.070
140
.544
.091
125
.569
.115
110
.593
.145
97
.618
.196
78
.653
.261
62
.686
N/A
277
.300
.008
232
.369
.014
213
.395
.020
199
.414
.035
174
.450
.048
157
.474
.059
145
.493
.076
129
.518
.096
114
.543
.121
99
.569
.163
80
.605
.215
64
.640
N/A
273
.262
.006
228
.325
.011
209
.350
.016
196
.367
.028
170
.402
.038
154
.426
.046
141
.444
.060
125
.469
.076
111
.494
.095
96
.520
.127
77
.557
.167
61
.594
0.625
0.556
15
35
0.625
0.567
15
35
0.625
0.549
15
33
0.625
0.548
10
35
0.625
0.559
10
33
0.625
0.535
10
33
0.625
0.609
10
33
0.625
0.571
10
33
0.625
0.548
10
30
0.625
0.522
10
30
1.207
1.009
0.470
1.303
0.502
0.459
1.239
0.922
0.423
1.325
0.479
0.426
1.260
0.975
0.406
1.356
0.341
0.396
1.292
0.873
0.377
1.374
0.326
0.367
1.292
0.873
0.377
1.385
0.317
0.347
1.333
0.905
0.300
1.420
0.313
0.315
1.331
0.880
0.327
1.426
0.307
0.298
1.350
0.812
0.294
1.434
0.302
0.284
1.350
0.795
0.313
1.440
0.298
0.272
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
1.171
1.045
0.518
1.263
0.539
0.510
Note: Rating and reduction data provided for reference purposes only; ITW Spiroid can provide recommendations for specific application needs.
13
1.875" Outside
2.250" Diameter
O.D. Spiroid – Helicon
Performance Ratings
1.875 " OD
Helicon
RPM
POSITION
ONLY
Output
10:1
12:1
14:1
17:1
21:1
25:1
POSITION
31:1
38:1 ONLY
47:1
58:1
HP Out
N/A
N/A
N/A
N/A
N/A
N/A
ITW
1 Input Speed
TQ Out
300
311
334 Heartland
400 Ratio to
426
426
Output
4
6
8.654 10 .613 12 .558 14 .50717
21
RPM
Efficiency
.704
.468
HP Out
.040
.034
.031
.030
.026
.022
100
TQ Out
256
264
282
335
356
356
Efficiency
.767
.724
.687
.637
.589
.549
" O.D..056
Performance
- 1.875.056
Helicon
HP Out Ratings
.074
.063
.048
.041
200
TQ
Out
238
244
261
308
328
RPM Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1 327
21:1
Efficiency
.787
.746
.711
.664
.617
.578
HP Out HP.001
N/A .057
N/A
Out N/A
.104 N/A
.089 N/A.080 N/A .079N/A .068
1
TQ Out
229
300
TQ129
Out 128
225 165
230 169246 167 290178 308232 307
Efficiency
.893
.841
.791
.738
.684
.640
.574
.524
Efficiency
.800 .028
.761 .023.727 .019 .682.017 .635
HP Out
.044
.029
.018 .597
.014
Out 113
.185 146
.157 147.140 145 .138153 .119
100
TQ Out HP115
198 .100
195
600
Out .872
199 .833
203 .788216 .741 254.702 270
269
Efficiency TQ.914
.643
.594
HP Out
.084
.055
.033 .633
.027
.823 .053
.788 .043.756 .035 .714.031 .670
Efficiency
200
TQ Out HP108
184
181
.254 137
.215 138.192 135 .188143 .163
.136
Out 106
.761
.723
.667
.619
Efficiency
.921
.833
.846
.805
182
185
197
231
245
244
900
TQ Out
HP Out
.120
.079
.076
.061
.050
.044
.047
.038
.837 131
.804 131.774 129 .734136 .692
.656
Efficiency
300
TQ Out
104
102
174
171
.316 .855
.266 .815.238 .773 .233.737 .201
Out .889
Efficiency HP.926
.683 .168
.636
170 .137
172 .110183 .089 214.079 227
226
1200
Out .143
HP Out TQ.219
.084
.067
600
TQ Out
94
92
154
152
.847 118
.816 118.787 115 .749121 .708
.673
Efficiency
Efficiency HP.934
.713 .219
.669
.415 .872
.349 .836.312 .797 .304.763 .262
Out .902
HP Out TQ.306
.115
.092
153 .191
155 .152165 .123 192.109 203
202
1750
Out .200
900
TQ Out
88
86
110
109
106
111
141
139
.860
.831
.804
.768
.729
.695
Efficiency
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
.531 .240
.446 .190.398 .153 .387.135 .333
Out .251
.143 .279
.115
HP Out HP.386
137 103
139 102147 99 171104 180132 179
Out
1200 2500
TQ Out TQ 83
81
130
.872 .889
.844 .857.819 .822 .785.791 .748
Efficiency
Efficiency
.943
.915
.746 .716
.708
HP Out HP.517
.189 .351
.151
.677 .320
.566 .253.505 .203 .489.179 .420
Out .336
1750 3600
TQ Out TQ 76
74
94122 93 130 90 150 95 158
119
117
121
157
Out
Efficiency
.948
.922
.764
.724
.883 .898
.858 .868.834 .836 .803.807 .768
.737
Efficiency
HP Out
.676
.437
.415
.327
.262
.231
.242
.194
.931 86.777 85 .692 81 .667 85 .572
.477
HP 70
Out
2500
TQ Out
67
107
105
100 .907
101 .879107 .849 123.822 129
128
6000
Out .928
Efficiency TQ.952
.781
.743
.898 .535
.875 .421.854 .336 .825.295 .793
Efficiency
HP Out
.878
.566
.309 .765
.246
3600
TQ Out HP 63
61
77
93
1.045 76.929 73 .892 76 .76395
.636
Out 1.256
.762
Efficiency TQ.957
.798
81 .91581 .890 86 .862 98 .836 103
102
10000
Out .935
HP Out
1.243
.798
.426 .791
.339
.911 .751
.891 .587.872 .467 .846.409 .817
Efficiency
N/A
462
25
.390
.019
380
.473
.036
348
25:1
.503
N/A
.050
246
325
.478
.523
.013
.087
209
282
.549
.024
.562
193
.117
.575
254
.034
.587
183
.144
.593
234
.060
162
.605
.626
.186
.083
208
148
.629
.648
.235
.103
184
138
.653
.664
.135
.295
124
160
.686
.676
.173
.398
111
130
.706
.708
.220
98
.526
.727
103
.301
.738
N/A
454
31
.350
.016
374
.429
.029
342
31:1
.458
N/A
.040
228
230
.403
.478
.010
.069
191
277
.475
.018
.517
176
.094
.502
249
.025
.542
166
.115
.521
230
.045
146
.561
.556
.149
.061
204
133
.586
.580
.188
.076
180
123
.610
.597
.099
.235
110
156
.621
.635
.126
.316
98
126
.643
.669
.159
86
.417
.667
100
.217
.702
Center Distance 0.750 0.750 0.750 0.750 0.750 0.750
Pinion Diameter 0.656 0.669 0.646 0.688 0.659 0.629
Dimension
15
15
15
10
10
10
PressureData
Angle - Lo
Center
Distance
0.305
0.536
0.536
35 0.536
35 0.53633 0.536 350.536 33
33
Pressure
Angle
- Hi 0.400
0.750
0.719
10
0.536
33
0.750 0.750 0.750
0.674 0.646 0.614
10
10
10
0.536
33 0.53630 0.536 30 0.536
0.753
0.254
1.183
1.436
0.262
0.818
0.354
0.261
0.731 0.673 0.661
0.277 0.251 0.264
1.188 1.474
1.1941.4931.199
1.465
1.501
0.256 0.891
0.2520.8110.249
0.900
0.806
0.331
0.317
0.249 0.333
0.2370.3170.227
1.445
0.283
0.404
1.483
0.283
0.369
1
6000
TQ Out
54
51
65
Efficiency
.962
.943
.926
TQ equals
output
torque
in inch-lbs
HP Out 1.721
1.100
1.031
10000
TQ Out
44
53
Dimension
Data 42
Efficiency
.967
.951
.936
63
.903
.803
52
.916
60
.879
.635
49
.894
63
.856
.556
51
.873
78
.821
.575
63
.824
77
.788
.457
62
.812
0.486
0.466
0.463
0.473
0.457
0.502
0.470
Load
PressureTooth
Angle - Lo
20Data 20
15
15
15
15
10
10
Pressure Angle - Hi
35 Fx 0.971
33
33
30 1.075
30
1.002 331.029 33 1.04730 1.070
Driving Side Hi Fy 0.872 0.841 0.767 0.812 0.743
Tooth Load Data Fz 0.439 0.397 0.360 0.343 0.313
1.049 1.138
1.083 1.225
1.1011.2901.128
Fx 1.135
Fx Lo
1.065
1.332 1.143
1.390
DrivingDriving
Side Hi Side
0.454 1.042
0.422 1.004
0.4020.9920.287
Fy 1.079
Fy 1.240
0.905 0.274
0.915
Fz 0.890
0.448 0.308
0.385
0.429 0.636
0.386 0.552
0.3580.4890.330
Fz 0.768
Fx 1.083
1.143
1.139
1.229
1.297
1.336
Driving
Sideload
Lo components equals lbs./inch-lb. output torque
Tooth
Fy 0.689
0.641
0.512
0.462
0.441
0.427
Fz
0.944
0.818
0.699
0.614
0.550
0.510
1.398
0.298
0.451
0.726
0.318
1.152
1.409
0.266
0.895
0.381
0.291
1.423
0.288
0.428
81
.755
.405
65
.782
0.457
10
28
1.109
71
.699
.289
56
.729
N/A
N/A
476
470
38.306 47 .267 58
.013
.011
392
386
.380
.336
.024
.019
357
38:1
47:1 35158:1
.408
.362
N/A.034 N/A .027N/A
225
334 241 328 238
.359
.312
.272
.427 .007.381.005
.008
189.058 202 .046199
.429288 .378 282 .332
.015
.466 .013.417.010
174.079 186 .062183
.455259 .403 253 .356
.021
.018
.014
.491 175 .442172
164
.096 .421.076.373
.473
.036238 .031 232 .025
144.509 153 .460150
.509
.124 .456.098.406
.049211 .042 205 .033
131
138
136
.535
.486
.533
.479
.429
.156 .052.123.041
.061
121185 128 179 125
.560 .497.511.447
.550
.079
.195 .067.153.053
108161 114 155 111
.575
.586 .522 .537.471
.100
.086
.067
.261 101 .203 98
96
.598129 .546 124 .495
.622 .108.575.084
.127
84.343 89 .266 86
.623102 .571 97 .521
.172
.656 .146.611.114
69
.657
.229
55
.690
72
.607
.193
57
.642
69
.557
.150
55
.594
0.516
0.482
0.463
0.439
10
10
10
10
30
30
1.108
1.123 28 1.12428
1.496
0.280
0.353
1.510
0.278
0.337
1.520
0.277
0.325
Note: Rating Note:
and reduction
Data intended
data provided
for general
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
change
canas
provide
application
recommendations
parameters become
for specific
further
application
defined needs.
14
Table 8
XX
3.000" O.D. Spiroid
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
Output
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.001
691
.714
.089
578
.781
.164
531
.801
.232
499
.815
.405
436
.838
.552
396
.851
.682
367
.861
.890
328
.873
1.131
292
.884
1.429
257
.895
1.948
210
.908
2.605
168
.920
.001
721
.664
.077
598
.739
.141
548
.763
.198
513
.777
.345
447
.804
.469
405
.820
.578
374
.831
.752
334
.846
.953
296
.859
1.202
259
.871
1.632
211
.887
2.175
169
.902
.001
776
.624
.069
641
.704
.127
587
.729
.178
549
.745
.310
478
.775
.421
432
.792
.518
399
.805
.673
356
.821
.853
315
.835
1.074
276
.850
1.456
224
.868
1.938
179
.884
.001
992
.565
.073
810
.652
.134
738
.680
.187
689
.699
.324
595
.732
.438
536
.752
.537
494
.766
.695
438
.785
.877
387
.802
1.100
337
.818
1.485
273
.840
1.967
217
.859
.001
997
.519
.060
813
.608
.109
741
.637
.153
691
.657
.264
597
.692
.357
537
.714
.438
495
.730
.567
439
.750
.714
387
.769
.895
337
.787
1.206
272
.812
1.595
216
.833
.001
1062
.476
.054
864
.566
.098
786
.596
.137
733
.617
.236
632
.654
.318
568
.677
.390
522
.496
.504
463
.716
.634
408
.736
.794
354
.757
1.067
286
.783
1.408
226
.808
.001
1088
.401
.045
872
.493
.081
789
.525
.112
732
.546
.192
626
.587
.258
560
.612
.315
512
.630
.404
451
.655
.506
396
.678
.630
342
.701
.841
274
.731
1.103
215
.760
N/A
1138
.357
.038
912
.445
.069
824
.477
.096
764
.498
.163
651
.539
.218
581
.565
.266
532
.584
.341
467
.609
.427
409
.634
.530
353
.658
.705
282
.691
.922
221
.722
N/A
1119
.315
.030
896
.399
.055
808
.429
.076
749
.450
.129
637
.491
.172
567
.517
.210
518
.536
.268
454
.562
.335
397
.588
.415
341
.613
.550
271
.648
.715
212
.681
N/A
1179
.274
.026
941
.351
.046
847
.381
.064
783
.401
.109
663
.440
.145
589
.466
.176
536
.485
.224
469
.512
.279
407
.537
.344
349
.564
.453
276
.600
.587
214
.635
1.000
0.868
15
35
1.000
0.838
15
33
1.000
0.911
10
33
1.000
0.854
10
33
1.000
0.829
10
30
1.000
0.934
10
33
1.000
0.891
10
30
1.000
0.837
10
30
1.000
0.807
10
28
0.748
0.631
0.305
0.809
0.321
0.293
0.767
0.575
0.277
0.823
0.305
0.272
0.796
0.580
0.231
0.846
0.218
0.250
0.799
0.556
0.240
0.855
0.207
0.233
0.815
0.513
0.216
0.864
0.201
0.219
0.289
0.561
0.199
0.885
0.197
0.197
0.842
0.517
0.177
0.891
0.193
0.187
0.840
0.502
0.194
0.895
0.190
0.178
0.852
0.463
0.171
0.899
0.187
0.170
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
1.000
0.850
15
35
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
0.723
0.656
0.339
0.782
0.347
0.327
15
1.875" Outside
3.750" Diameter
Performance Ratings
1.875 " OD
Helicon
RPM
POSITION
ONLY12:1
Output
10:1
14:1
17:1
21:1
25:1
.002
.002
.002
.002
.001
.001
HP Out
ITW
1 Input Speed
1318
1461
1490Heartland
1912Ratio to
1925
2050
TQ Out
OutputEfficiency
4
6.721 8 .669 10 .632 12 .57414
17
21
RPM
.528
.485
.167
.153
.131
.139
.114
.102
HP Out
1082
1186
1207
1529
1538
1635
100
TQ Out
.792
.749
.717
.667
.623
.582
Efficiency
" O.D..251
Performance
-.277
1.875.237
Helicon
.306
.205
.184
HP OutRatings
987
1078
1097
1382
1389
1475
200
TQ
Out
RPM Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
.812
.773
.743
.696
.654
.614
Efficiency
HP Out HP
.001
N/A
N/A
.428 N/A.388 N/A .332 N/A .349N/A .285
.255
Out N/A
1
TQ Out TQ
129
178 1289
232
229
923 1651005 1691022167 1283
1368
300
Out 128
Efficiency
.893
.841
.791
.738
.684
.640
.574
.524
.826 .028.788 .023.759.019 .714
.673
.634
Efficiency
HP Out
.044
.029
.017
.018
.014
.742 146.668 147 .571 145 .596153 .487
.435
Out 113
100
TQ Out HP
115
198
195
799 .833865 .788 879 .741 1096
1166
600
TQ
Out .872
Efficiency
.914
.702 1101
.643
.594
HP OutEfficiency
.084
.055
.031 .709
.033
.027
.848 .053.815 .043.789.035 .747
.672
200
TQ Out HP
108
184
181
1.004 137.901 138 .769 135 .801143 .654
.583
Out 106
.761
.723
.667
.619
Efficiency
.921
.833
.846
.805
721
778
790
981
985
1041
900
TQ Out
HP Out
.120
.079
.076
.061
.050
.044
.047
.038
.862
.831
.806
.767
.731
.695
Efficiency
300
TQ Out
104
102
131
131
129
136
174
171
1.234 .855
1.105 .815.943.773 .978
.711
Out .889
Efficiency HP
.926
.737 .799
.683
.636
665 .137716 .110 726 .089 899.079 902
953
1200
Out .143
HP Out TQ
.219
.084
.067
.871 118.842 118 .818 115 .781121 .746
.712
600
TQ OutEfficiency
94
92
154
152
Efficiency HP
.934
.763 1.026
.713
.669
1.600 .872
1.428 .8361.218.797 1.258
.913
Out .902
HP Out TQ
.306
.115
.092
591 .191634 .152 643 .123 793.109 795
838
1750
Out .200
900
TQ Out
88
86
110
109
106
111
141
139
.883
.856
.834
.799
.766
.734
Efficiency
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
2.023
1.799
1.533
1.578
1.286
1.142
HP
Out
.251
.240
.190
.153
.135
.143
.115
HP Out
.386
734
1200 2500
TQ Out TQ83Out
81523 103559 102 567 99 696104 697
132
130
.893 .889.868 .857.847.822 .815
.753
EfficiencyEfficiency
.943
.915
.791 .784
.746
.708
HP Out HP
.517
.179 1.603
.189 1.421
.151
2.542 .320
2.254 .2531.920.203 1.968
Out .336
1750 3600
TQ Out TQ76Out
74456 94 487 93 493 90 60395
119
117
603
634
.948
.922
.807 .802
.764
.724
.903 .898.880 .868.861.836 .831
.773
HP Out
.676
.437
.415
.327
.262
.231
.242
.194
3.439 863.037 852.54881 2.63685 2.143
1.897
HP70Out 67
2500
TQ Out
107
105
370 .907393 .879 398 .849 485.822 484
508
6000
Out .928
Efficiency TQ
.952
.781
.743
.916 .535.895 .421.878.336 .851
.798
HP OutEfficiency
.878
.566
.295 .825
.309
.246
3600
TQ Out HP63Out
61
95
93
4.567 774.019 763.41673 3.46976 2.816
2.486
.762
Efficiency TQ
.957
.798
295 .915312 .890 316 .862 383.836 382
400
10000
Out .935
HP OutEfficiency
1.243
.798
.409 .845
.426
.339
.926 .751.908 .587.893.467 .869
.821
1
6000
TQ Out
54
51
65
.962torque
.943
.926
TQ Efficiency
equals output
in inch-lbs
HP Out 1.721
1.100
1.031
10000 Dimension
TQ Out
44Data 42
53
Efficiency
.967
.951
.936
63
.903
.803
52
.916
60
.879
.635
49
.894
63
.856
.556
51
.873
78
.821
.575
63
.824
77
.788
.457
62
.812
1.250 1.250 1.250 1.250 1.250 1.250
Center Distance
1.039 1.080 1.025 1.116 1.045 1.012
Pinion Diameter
Dimension
Data
15
15
15
10
10
10
Pressure
Angle - Lo
Center
Distance
0.305
0.536
0.536
35 0.53633 0.536 33 0.536 330.536 33
30
Pressure Angle
- Hi 0.400
0.486
0.466
0.463
0.473
0.457
0.502
Tooth
Pressure Angle
- LoLoad
20 Data20
15
15
15
15
10
Pressure Angle - Hi
35 Fx 33
30
0.575 330.606 330.61133 0.63530 0.638
Driving Side Hi Fy 0.526 0.485 0.460 0.463
Fz 0.276 0.226 0.226 0.189
Tooth Load Data
0.623 1.138
0.6471.225
0.656
Fx Lo
1.065Fx 1.135
1.2900.675
1.332
DrivingDriving
Side Hi Side
0.282 1.042
0.2591.004
0.246
Fy 1.240Fy 1.079
0.9920.176
0.905
Fz 0.890Fz 0.768
0.4890.201
0.448
0.264 0.636
0.2350.552
0.220
Fx 1.083
1.143
1.139
1.229
1.297
1.336
Driving
Side load
Lo components equals lbs./inch-lb. output torque
Tooth
Fy 0.689
0.641
0.512
0.462
0.441
0.427
Fz 0.944
0.818
0.699
0.614
0.550
0.510
0.444
0.195
0.470
10
30
0.650
0.409
0.177
0.683
1.390 0.690
1.409
0.167
0.915 0.162
0.895
0.385 0.176
0.381
0.188
1.398
0.298
0.451
1.423
0.288
0.428
POSITION
31:1
38:1 ONLY
47:1
.001
2112
25
.410
.085
1656
.509
.152
1484
25:1
.542
N/A
.210
246
1370
.478
.565
.013
.355
209
1157
.549
.024
.606
193
.473
.575
1027
.034
.631
183
.575
.593
936
.060
.650
162
.626
.733
.083
819
148
.674
.648
.913
.103
714
138
.696
.664
.135
1.130
124
613
.686
.719
.173
1.498
111
488
.706
.748
.220
98
1.951
.727
381
.301
.775
81
.755
.405
65
.782
58:1
.001
.001
.001
2209
2170
2284
31.365 38 .323 47 .28158
.072
.057
.049
1729
1698
1780
.461
.414
.366
.129
.102
.087
1548
1517
1587
31:1 38:1
47:1
58:1
.494
.447
.397
N/A
.179 N/A.141 N/A .120N/A
228
1427 2251397 241 1458238
.403
.359
.312
.272
.516 .008.469 .007 .419.005
.010
.301 189.238 202 .200199
191
1202 .4291174.378 1219
.475
.332
.018
.559 .015.511 .013 .460.010
176
.400 174.315 186 .265183
.502
.356
1065 .4551038.403 1075
.025
.021
.018
.014
.585
.538
.487
166
164
175
172
.486 .473.382 .421 .320.373
.521
969 .036943 .031 974.025
.045
.604 144.557 153 .507150
146
.556
.618 .509.485 .456 .405.406
.061
847 .049822 .042 845.033
133
.630 131.584 138 .533136
.580
.533
.479
.429
.768
.076
.061.601 .052 .500.041
736 121713 128 731125
123
.654 .550.609 .497 .559.447
.597
.099
.949 .079.741 .067 .613.053
110
631 108610 114 622111
.621
.678 .575.634 .522 .585.471
.126
.100
.086
.067
1.253 96 .975 101 .80298
98
500 .598481 .546 489.495
.643
.709 .127.668 .108 .621.084
.159
86
1.627 841.261 89 1.03286
.667
390 .623373 .571 377.521
.217
.739 .172.700 .146 .655.114
71
.699
.289
56
.729
69
.657
.229
55
.690
72
.607
.193
57
.642
69
.557
.150
55
.594
1.250 1.250 1.250 1.250
1.144 1.091 1.024 0.985
10
10
10
10
0.536
33 0.536
30 0.53630 0.536 280.536
0.457
0.516
0.482
0.463
0.439
10
10
10
10
10
28
30
0.662
0.672 300.617 28 0.68028
0.447
0.162
0.708
1.436
0.158
0.818
0.354
0.158
1.445
0.283
0.404
0.411
0.147
0.400
0.158
0.368
0.142
0.712 1.474
0.7151.4930.719
1.465
1.501
0.155 0.891
0.1520.8110.150
0.900
0.806
0.331
0.317
0.150 0.333
0.1430.3170.136
1.483
1.496
1.510
1.520
0.280
0.278
0.277
0.283
0.325
0.369
0.353
0.337
Note: Rating Note:
and reduction
Data intended
data provided
for general
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
change
canas
provide
application
recommendations
parameters become
for specific
further
application
defined needs.
16
Table 8
XX
4.500" O.D. Spiroid
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
Output
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.004
2360
.724
.095
1903
.798
.534
1725
.820
.745
1604
.833
1.278
1376
.855
1.720
1234
.869
2.105
1133
.878
2.714
1002
.889
3.413
882
.899
4.267
766
.908
5.736
618
.920
7.576
489
.931
.003
2484
.676
.255
1982
.759
.460
1789
.783
.641
1660
.798
1.094
1417
.825
1.468
1268
.840
1.793
1161
.851
2.305
1024
.864
2.891
899
.876
3.606
779
.887
4.832
626
.902
6.362
495
.914
.003
2538
.640
.219
2021
.728
.395
1824
.754
.549
1691
.771
.936
1443
.800
1.256
1290
.817
1.533
1181
.829
1.970
1041
.843
2.469
913
.857
3.077
790
.870
4.119
635
.886
5.417
501
.900
.003
3267
.581
.233
2565
.678
.417
2302
.708
.578
2126
.727
.980
1801
.760
1.308
1603
.779
1.592
1463
.793
2.037
1284
.810
2.543
1122
.826
3.157
967
.841
4.204
773
.860
5.505
607
.877
.002
.002
.002
3291
3510
3632
.536
.493
.416
.191
.171
.143
2582
2747
2791
.636
.595
.522
.342
.306
.254
2317
2461
2482
.667
.628
.557
.474
.424
.350
2139
2271
2278
.687
.649
.579
.802
.716
.585
1810
1917
1906
.723
.687
.621
1.070
.954
.775
1610
1703
1683
.745
.710
.647
1.301 1.159
.938
461
1552
1527
.760 726.000 .665
1.663 1.479
1.190
1288
1358
1329
.779
.747
.689
2.075 1.842
1.475
1125
1184
1152
.796
.767
.711
2.573 2.282
1.817
969
1019
986
.813
.785
.733
3.422 3.028
2.394
773
811
780
.835
.810
.761
4.474 3.950
3.104
606
635
606
.854
.831
.787
.002
3796
.372
.122
2856
.474
.216
253
.509
.297
2319
.532
.496
1929
.575
.655
1697
.602
.791
1534
.621
1.002
1330
.646
1.239
1148
.670
1.523
977
.693
2.001
767
.724
2.556
592
.752
.001
3726
.330
.096
2856
.427
.171
2533
.461
.235
2319
.484
.391
1929
.527
.516
1697
.555
.622
1534
.574
.785
1330
.601
.969
1148
.626
1.188
977
.650
1.554
767
.684
2.000
592
.714
.001
3920
.287
.082
2992
.379
.145
2646
.412
.198
2417
.434
.328
2001
.477
.432
1753
.504
.519
1581
524.000
.653
1365
.551
.803
1174
.577
.980
996
.603
1.276
777
.638
1.633
597
.671
1.500
1.274
15
33
1.500
1.207
15
33
1.500
1.318
10
33
1.500
1.232
10
33
1.500
1.194
10
30
1.500
1.352
10
33
1.500
1.287
10
30
1.500
1.206
10
30
1.500
1.161
10
28
0.503
0.404
0.192
0.537
0.218
0.197
0.508
0.383
0.191
0.545
0.206
0.185
0.528
0.385
0.160
0.562
0.148
0.169
0.530
0.370
0.165
0.568
0.140
0.157
0.541
0.340
0.149
0.574
0.135
0.148
0.551
0.372
0.137
0.589
0.133
0.132
0.559
0.342
0.125
0.593
0.130
0.125
0.559
0.333
0.133
0.596
0.127
0.119
0.566
0.305
0.121
0.599
0.125
0.114
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
1.500
1.245
15
33
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
0.486
0.423
0.217
0.519
0.238
0.220
Note: Rating and Tooth
reduction
provided equals
for reference
purposes
only;
ITW Spiroid can provide recommendations for specific application needs.
loaddata
components
lbs./inch-lb.
output
torque
17
1.875" Outside
5.250" Diameter
Performance Ratings
1.875 " OD
Helicon
RPM
POSITION
ONLY12:1
Output
10:1
14:1
17:1
21:1
31:1
HP Out
.006
.005
.004
.005
.004
.003
ITW Heartland
to 1 Input Speed
TQ Out
3677 3887
3979
5136Ratio 5521
5527
OutputEfficiency
4
6.729
8.681 10 .646 12 .58714 .538
17
21
RPM
.499
HP Out
.452
.393
.338
.360
.314
.265
100
TQ Out
2923 3054
3121
3966
4252
4254
Efficiency
.806
.767
.737
.688
.643
.606
" O.D..641
Performance
-.705
1.875.606
Helicon
.815
.559
.471
HP OutRatings
Out 6:1
2634 8:1
2742 10:1280012:1 3537
RPM 200
Output TQ4:1
14:1 3787
17:1 3787
21:1
Efficiency
.827
.792
.764
.718
.675
.639
HP Out HP
.001
N/A
N/A
1.113 N/A.978 N/A.839 N/A .885N/A .771
.649
Out N/A
1
TQ Out TQ129
232
229
300
Out 128
2440 165
2534 1692586167 3254178 3481
3479
Efficiency
.893
.841
.791
.738
.684
.640
.574
.524
Efficiency
.840 .028
.807 .023.780.019 .737.017 .696
.661
HP Out
.044
.029
.018
.014
1.930 146
1.657 1471.421145 1.487
Out 113
100
TQ Out HP115
153 1.293
198 1.088
195
600
Out .872
2078 .833
2147 .7882189.741 3734
Efficiency TQ
.914
.702 2920
.643 2915
.594
HP OutEfficiency
.084
.055
.033
.027
.862 .053
.833 .043.809.035 .770.031 .732
.699
200
TQ Out HP108
143 1.716
184 1.443
181
2.585 137
2.213 1381.897135 1.977
Out 106
.761
.723
.667
.619
Efficiency TQ
.921
.846
.805
900
Out .833
1856 1912
1948
2422
2583
2577
HP Out
.120
.079
.076
.061
.050
.044
.047
.038
Efficiency
.875 131.848 131.826 129 .789136 .753
.722
300
TQ Out
104
102
174
171
3.154 .855
2.694 .8152.308.773 2.397
Out .889
Efficiency HP
.926
.737 2.079
.683 1.747
.636
1200
Out .143
1698 .137
1745 .1101778.089 2203
HP Out TQ
.219
.079 2348
.084 2340
.067
600
TQ OutEfficiency
94
92
154
152
.884 118.858 118.837 115 .803121 .768
.738
Efficiency HP
.934
.763 2.645
.713 2.221
.669
4.049 .872
3.450 .8362.953.797 3.054
Out .902
HP Out TQ
.306
.109 2048
.115 2039
.092
1750
Out .200
1495 .191
1532 .1521560.123 1925
900
TQ Out
88
86
110
109
106
111
141
139
Efficiency
.895
.871
.851
.819
.787
.759
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
5.072
4.310
3.687
3.798
3.285
2.755
HP
Out
.251
.240
.190
.153
.135
.143
.115
HP Out
.386
Out 81
1311 103
1340 1021363 99 1676104 1781
1771
1200 2500
TQ Out TQ83
132
130
.904 .889
.883 .857.864.822 .835.791 .804
.777
.943
.915
.746
.708
HP Out HP
.517
.179 4.058
.189 3.399
.151
6.318 .320
5.355 .2534.577.203 4.698
Out .336
1750 3600
TQ Out TQ76
119
117
Out 74
1134 941156 93 1175 90 143995 1527
1517
.948
.922
.764
.724
.913 .898
.893 .868.877.836 .849.807 .821
.796
1
HP Out
.676
.437
.415
.327
.262
.231
.242
2500TQ equals
TQ Outoutput
70 torque
67in inch-lbs
86
85
81
85
107
Efficiency
.952
.928
.907
.879
.849
.822
.781
HP Out
.878
.535
.421
.336
.295
.309
Dimension
Data.566
3600
TQ Out
63
61
77
76
73
76
95
1.750 .915
1.750 .8901.750.862 1.750
Center Distance
Efficiency
.957
.935
.836 1.750
.798
Pinion
1.431 .751
1.465 .5871.388.467 1.518
HP OutDiameter
1.243
.798
.409 1.445
.426
6000 Pressure
TQ OutAngle54- Lo 5115
65 15 63 15 60 10 63
1078
EfficiencyAngle
.962
.821
Pressure
- Hi .94333 .92633 .903 33 .879 33.856 30
HP Out 1.721
1.100
1.031
.803
.635
.556
.575
10000 Tooth
TQ OutLoad
44 Data42
53
52
49
51
63
Efficiency
.967Fx .951
.873 0.461
.824
0.415 .936
0.430 .9160.434.894 0.452
Driving Side Hi
Fy in0.363
TQ equals output torque
inch-lbs 0.347
0.329 0.330
Fz 0.189 0.167 0.166 0.139
0.443 0.536
0.4600.536
0.4660.5360.481
Center Distance 0.305Fx 0.400
0.536
Driving Side Lo
0.457
Pinion Diameter 0.589Fy 0.486
0.206 0.466
0.1890.463
0.1780.4730.128
Pressure Angle - Lo
20 Fz 20
0.190 15
0.170 150.159 15 0.14515
Dimension Data
Pressure Angle - Hi
35
33
33
33
33
30
.194
105
.743
.246
93
1.750
.762
1.372
.339
77
10
.788
30
.457
62
.812
0.463
0.301
0.126
0.487
0.536
0.502
0.121
10
0.135
0.291
0.130
0.491
0.536
0.470
0.117
10
0.127
1.390
0.915
0.385
1.398
0.298
0.451
1.409
0.895
0.381
1.423
0.288
0.428
30
30
POSITION
38:1
21:1 ONLY
47:1
.003
5511
25
.451
.213
4235
.558
.379
3765
25:1
.592
N/A
.522
246
3456
.478
.614
.013
.873
209
2889
.549
.024
.655
193
1.156
.575
250
.034
.680
183
1.398
.593
2312
.060
162
.697
.626
1.773
.083
2012
148
.720
.648
2.196
.103
1744
138
.740
.664
.135
2.705
124
1492
.686
.761
.173
111
.706
.220
98
1.750
.727
1.297
.301
81
10
.755
30
.405
65
.782
0.465
58:1
.003
.002
.002
6466
6345
6676
31
.381 38.339 47 .29558
.204
.162
.137
4883
4785
5012
.489
.442
.392
.360
.285
.241
4311 38:1
421747:14403
31:1
58:1
.525
.477
.427
N/A
.493 N/A.390 N/A .329N/A
228
3937 2253846 241 4006238
.403
.359
.312
.272
.548 .008.500 .007 .450.005
.010
.817 189.643 202 .540199
191
3261 .4293176 .378 3290
.475
.332
.018
.592 .015.544 .013 .494.010
176
1.075 174.845 186 .707183
.502
2861 .4552780 .403 2870.356
.025
.021
.018
.014
.619 164.572 175 .521172
166
1.295 .473
1.015.421 .847.373
.521
2584 .0362507 .031 2580.025
.045
146
.638 144.592 153 .541150
.556
.406
1.634 .509
1.278.4561.062
.061
2236 .0492163 .042 2218.033
133
.663 131.618 138 .568136
.580
.533
.479
.429
2.013
1.571.0521.300
.076
.061
.041
1929 1211861 128 1901125
123
.686 .550.642 .497 .594.447
.597
.099
.053
2.467 .079
1.919.0671.582
110
1641 1081579 114 1607111
.621
.708 .575.667 .522 .620.471
.126
98
.643
.159
86
1.750
.667
1.480
.217
7110
.699
30
.289
56
.729
0.478
.100
.086
.067
96
101
98
.598
.546
.495
.084
.127
.108
84
89
86
1.750.5711.750
.623
.521
1.385.1461.331
.172
.114
69 10 72 10 69
.657 30 .607 28 .557
.229
.193
.150
55
57
55
.690
.594
0.479.6420.485
0.283 0.293 0.286 0.261
0.132 0.108 0.115 0.105
0.496 0.536
0.508 0.536
0.5100.5360.513
0.536
0.536
0.457
0.439
0.113 0.516
0.112 0.482
0.1100.4630.108
10
10
0.119
0.108 100.102 10 0.09810
28
30
30
28
28
1.436
0.818
0.354
1.445
0.283
0.404
1.465
0.900
0.331
1.483
0.283
0.369
1.474
0.891
0.333
1.496
0.280
0.353
1.493
0.811
0.317
1.510
0.278
0.337
1.501
0.806
0.317
1.520
0.277
0.325
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
1.065
1.240
0.890
1.083
0.689
0.944
1.135
1.079
0.768
1.143
0.641
0.818
1.138
1.042
0.636
1.139
0.512
0.699
1.225
1.004
0.552
1.229
0.462
0.614
1.290
0.992
0.489
1.297
0.441
0.550
1.332
0.905
0.448
1.336
0.427
0.510
Note: Rating Note:
and reduction
Data intended
data provided
for general
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
change
canas
provide
application
recommendations
parameters become
for specific
further
application
defined needs.
18
Table 8
XX
6.000" O.D. Spiroid
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
Output
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.009
5689
.736
.692
4473
.814
1.243
4014
.835
1.722
3708
.847
2.916
3139
.869
3.893
2795
.882
4.738
2551
.890
6.064
2239
.900
7.575
1957
.910
9.410
1689
.918
.008
6476
.444
.646
4990
.671
1.152
4446
.720
1.589
4088
.748
2.668
3433
.793
3.544
3040
.816
4.298
2765
.832
5.475
2415
.850
6.809
2103
.866
8.425
1807
.880
.007
6238
.654
.523
4836
.747
.934
4319
.774
1.291
3977
.790
2.173
3347
.818
2.890
2969
.834
3.509
2703
.845
4.475
2364
.859
5.571
2060
.872
6.899
1771
.883
.008
6238
.580
.596
4836
.689
1.054
4319
.720
1.447
3977
.739
2.405
3347
.773
3.176
2969
.792
3.835
2703
.806
4.858
2364
.822
6.010
2060
.837
7.399
1771
.852
.006
8733
.547
.490
6641
.656
.869
5888
.688
1.194
5395
.708
1.992
4499
.744
2.635
3967
.765
3.185
3596
.779
4.039
3128
.798
5.003
2712
.814
6.163
2320
.830
.005
8771
.509
.415
6664
.619
.735
5903
.653
1.009
5406
.674
1.681
4502
.712
2.221
3966
.735
2.682
3592
.750
3.399
3121
.770
4.205
2703
.788
5.174
2310
.806
.005
9609
.456
.357
7137
.568
.632
6262
.603
.867
5697
.625
1.439
4684
.666
1.897
4093
.691
2.288
3685
.708
2.892
3177
.730
3.570
2731
.750
4.383
2316
.770
.004
9609
.387
.298
7137
.499
.523
6262
.536
.714
5697
.560
1.174
4684
.604
1.538
4093
.631
1.847
3685
.650
2.321
3177
.674
2.851
2731
.697
3.482
2316
.719
.003
9424
.344
.236
6989
.452
.413
6122
.488
.563
5561
.512
.923
4557
.557
1.207
3973
.584
1.446
3571
.604
1.814
3070
.630
2.222
2632
.654
2.706
2226
.678
.003
9914
.300
.200
7314
.402
.349
6384
.438
.475
5784
.461
.774
4714
.506
1.008
4094
.534
1.205
3669
.554
1.504
3142
.581
1.836
2684
.607
2.227
2261
.632
2.000
1.651
15
33
2.000
1.565
15
33
2.000
1.709
10
33
2.000
1.630
10
30
2.000
1.546
10
30
2.000
1.485
10
28
2.000
1.671
10
30
2.000
1.563
10
30
2.000
1.501
10
28
0.374
0.297
0.150
0.401
0.162
0.149
0.379
0.290
0.146
0.407
0.158
0.141
0.393
0.282
0.127
0.420
0.107
0.127
0.403
0.265
0.111
0.426
0.107
0.119
0.404
0.256
0.114
0.429
0.103
0.112
0.412
0.233
0.103
0.434
0.100
0.104
0.418
0.256
0.096
0.444
0.098
0.094
0.418
0.250
0.101
0.446
0.096
0.090
0.424
0.228
0.093
0.449
0.094
0.085
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
2.000
1.614
15
33
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
0.362
0.323
0.167
0.387
0.185
0.168
19
Application Data
POSITION ONLY
Helicon Data Factors
This section includes tables for gear set performance, pertinent dimensions and tooth loads.
Standard design data for Helicon gear sets is given in Tables represented on pages 24- 31. These
gear sets are well-balanced designs suitable for the majority of general purpose applications.
The tables are design tools to be used as a guide to allow the engineer to make preliminary size
selection of a Helicon gear set. The gear sets listed in the table do not represent standard “off-theshelf” hardware.
By varying both tooth and blank proportions, it is possible to place special emphasis on such specific performance characteristics as efficiency, self-locking, reversibility, high strength, exceptionally
smooth angular velocity, etc. The design possibilities featuring and blending the various characteristics are, therefore, quite numerous.
In making a size selection, apply the material and service factors from Tables A and B. Divide catalog ratings or multiply driven load by appropriate service and material factors. Then, select the gear
set with the proper rating for the given input speed and ratio requirements.
If a gear set is desired which falls in between two standard sizes, take the data from the closest set
and scale all linear dimensions either up or down as needed.
For special designs requiring particular performance characteristics, please contac tITW Heartland
representatives.
Helicon Gear Tooth Load Components
When selecting bearings, it is necessary to know the direction and magnitude of the tooth forces so
that bearing relations may be determined. The rating tables give the following unit tooth loads for all
Helicon gear sets:
Fx – unit axial force acting on pinion
Fy – unit separating force acting on pinion
Fz – u
nit tangential force acting on pinion
(Units for above forces are pounds/inch-pound output torque)
1. Hi-Lo side forces are shown acting on the gear.
2.Forces act on the gear tooth at mid-tooth depth and at mid-face on the center distance.
3.Forces on the pinion are in the reverse direction from those shown.
20
Table 8
XX
Engine
10 hours per day
1.50
1.75
2.00
24 hours per day
1.75
2.00
2.25
Materials
Helicon gear set size data tables are based on the
following material combinations:
Lubrication
For steel-on-steel applications, full
synthetic extreme pressure oil is
recommended. For cases where
normal shock-free service is expected, SAE grade 90 should be used.
For cases where heavy duty or high
shock loading is expected, SAE
grade 140 should be used.
For steel-on-bronze applications, full
synthetic extreme pressure oil that is
rated for usage with enclosed worm
drives operating at medium to high
speeds is recommended.
Note: oil fill level should cover the
gear set mesh
Service Factor
Horsepower and torque ratings are
based on a unity service factor (1.0)
as defined in the table on the right.
The ratings given in the tables are
surface durability capacities and do
not take into account any thermal
limits.
Temperature
GEAR
ONLY
MATERIAL
1. F
or gear O.D. less than 16”: Both
pinion and gear are SAE 8620 Steel,
carburize hardened to 60 R.C.
.65
Molded Plastics
.25
Aluminum Bronze
.80
Die Cast Aluminum
.35
.40
Driven Machine
Load Classiﬁcations
Prime Mover
Duration of Service
Uniform
Moderate
Shock
Heavy
Shock
Electric Motor
0.80
0.90
1.00
(Normal service)
0.90
1.00
1.25
10 hours per day
1.00
1.25
1.50
24 hours per day
1.25
1.50
1.75
0.90
1.00
1.25
Electric Motor
(More than 10
1.00
1.25
1.50
starts per hour)
10 hours per day
1.25
1.50
1.75
24 hours per day
1.50
1.75
2.00
Multi-Cylinder
0.90
1.00
1.25
Internal Combustion
1.00
1.25
1.50
Engine
10 hours per day
1.25
1.50
1.75
24 hours per day
1.50
1.75
2.00
Single Cylinder
1.00
1.25
1.50
Internal Combustion
1.25
1.50
1.75
Engine
10 hours per day
1.50
1.75
2.00
24 hours per day
1.75
2.00
2.25
MATERIAL
The maximum sustained operating oil sump temperature should not exceed 180°F.
Oil level should cover gear set mesh.
GEAR
ONLY
.65
Molded Plastics
.25
Aluminum Bronze
.80
Die Cast Aluminum
.35
.40
21
1.875" Outside Diameter – Helicon
Gear
Ratio Details
Helicon APOSITION ONLY
Diagram
POSITION ONLY
1.875 " OD
The basic dimensional parameters of Spiroid and Helicon gear sets shown in Diagram A reITW Heartland
Ratio to 1 Input
late to gear and pinion interface. Center
distance
andSpeed
pinion thread diameter specifications
Output
4
6
8
10
12
14
17
21 sections
25
31of the
38 charts
47 located
58
RPM
are intended to be guides, and can be found in the bottom
on
pages 24 - 31. Pinion and gear mounting distances are flexible, and can be specified
depending on application requirements.
Performance Ratings - 1.875" O.D. Helicon
RPM
Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP OutB
Diagram
1
TQ Out
.001
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
129
128
165
169
167
178
232
229
246
228
225
241
238
Loading
vectors
indicated
Diagram
by the
arrows.
Efficiency
.893are.841
.791 in.738
.684 B.640
.574directional
.524
.478
.403 Load
.359 multiplier
.312
.272facHP
Out
.044
.029
.028
.023
.019
.017
.018
.014
.013
.010
.008
.007
.005 that
tors can be found in the bottom sections of the charts located on pages 24 - 31. Note
100
TQ Out
115
113
146
147
145
153
198
195
209
191
189
202
199
there are
typically
load .741
factors
between
low
high .429
side drive.
Efficiency
.914 differences
.872
.833 in.788
.702
.643
.594 side
.549and.475
.378
.332
HP Out
.084
.055
.053
.043
.035
.031
.033
.027
.024
.018
.015
.013
.010
200
TQ Out
108
106
137
138
135
143
184
181
193
176
174
186
183
.761
.723
.667
.619
.575
.502
.455
.403
.356
Efficiency
.921
.833
.846
.805
HP Out
.120
.079
.076
.061
.050
.044
.047
.038
.034
.025
.021
.018
.014
300
TQ Out
104
102
131
131
129
136
174
171
183
166
164
175
172
Efficiency
.926
.889
.855
.815
.773
.737
.683
.636
.593
.521
.473
.421
.373
HP Out
.219
.143
.137
.110
.089
.079
.084
.067
.060
.045
.036
.031
.025
600
TQ Out
94
92
118
118
115
121
154
152
162
146
144
153
150
Efficiency
.934
.902
.872
.836
.797
.763
.713
.669
.626
.556
.509
.456
.406
HP Out
.306
.200
.191
.152
.123
.109
.115
.092
.083
.061
.049
.042
.033
900
TQ Out
88
86
110
109
106
111
141
139
148
133
131
138
136
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
.648
.580
.533
.479
.429
.251
.240
.190
.153
.135
.143
.115
.103
.076
.061
.052
.041
HP Out
.386
121
128
125
1200
TQ Out
83
81
103
102
99
104
132
130
138
123
Efficiency
.943
.915
.889
.857
.822
.791
.746
.708
.664
.597
.550
.497
.447
HP Out
.517
.336
.320
.253
.203
.179
.189
.151
.135
.099
.079
.067
.053
1750
TQ Out
76
74
94
93
90
95
119
117
124
110
108
114
111
Efficiency
.948
.922
.898
.868
.836
.807
.764
.724
.686
.621
.575
.522
.471
HP Out
.676
.437
.415
.327
.262
.231
.242
.194
.173
.126
.100
.086
.067
2500
TQ Out
70
67
86
85
81
85
107
105
111
98
96
101
98
Efficiency
.952
.928
.907
.879
.849
.822
.781
.743
.706
.643
.598
.546
.495
.084
HP Out
.878
.566
.535
.421
.336
.295
.309
.246
.220
.159
.127
.108
3600
TQ Out
63
61
77
76
73
76
95
93
98
86
84
89
86
.762
.727
.667
.623
.571
.521
Efficiency
.957
.935
.915
.890
.862
.836
.798
HP Out 1.243
.798
.751
.587
.467
.409
.426
.339
.301
.217
.172
.146
.114
6000
TQ Out
54
51
65
63
60
63
78
77
81
71
69
72
69
Efficiency
.962
.943
.926
.903
.879
.856
.821
.788
.755
.699
.657
.607
.557
HP Out 1.721
1.100
1.031
.803
.635
.556
.575
.457
.405
.289
.229
.193
.150
10000
TQ Out
44
42
53
52
49
51
63
62
65
56
55
57
55
Efficiency
.967
.951
.936
.916
.894
.873
.824
.812
.782
.729
.690
.642
.594
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
0.305
0.589
20
35
0.400
0.486
20
33
0.536
0.466
15
33
0.536
0.463
15
33
0.536
0.473
15
33
0.536
0.457
15
30
0.536
0.502
10
30
0.536
0.470
10
30
0.536
0.457
10
28
0.536
0.516
10
30
0.536
0.482
10
30
0.536
0.463
10
28
0.536
0.439
10
28
1.135
1.079
0.768
1.143
0.641
0.818
1.138
1.042
0.636
1.139
0.512
0.699
1.225
1.004
0.552
1.229
0.462
0.614
1.290
0.992
0.489
1.297
0.441
0.550
1.332
0.905
0.448
1.336
0.427
0.510
1.390
0.915
0.385
1.398
0.298
0.451
1.409
0.895
0.381
1.423
0.288
0.428
1.436
0.818
0.354
1.445
0.283
0.404
1.465
0.900
0.331
1.483
0.283
0.369
1.474
0.891
0.333
1.496
0.280
0.353
1.493
0.811
0.317
1.510
0.278
0.337
1.501
0.806
0.317
1.520
0.277
0.325
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
1.065
1.240
0.890
1.083
0.689
0.944
Note:
reduction
ratiosreference
may be possible
depending
on application
Note: Additional
Data intended
for general
purposes
only and may
change asparameters
application parameters become further defined
22
Table 8
XX
C Dia
a
Pinion od
F Dia max
Diagram A
FZ - LO
FZ - LO
Tooth lo p.a.
FY - LO
hi side drive
FX - HI
FX- HI
FZ - HI
FZ - HI
LO side drive
hi side drive
LO side drive
Diagram B
23
1.875" Outside
Diameter
1.500" O.D.
Helicon– Helicon
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
Output
POSITION ONLY
4:1
6:1
8:1
N/A
66
.891
.023
59
.911
.044
56
.917
.063
54
.922
.116
50
.930
.163
47
.935
.206
44
.939
.277
41
.944
.364
38
.949
.476
34
.953
.680
29
.959
.950
25
.965
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
N/A
66
.835
.015
59
.865
.029
56
.875
.042
54
.882
.076
49
.895
.107
46
.902
.134
43
.908
.181
40
.915
.237
37
.922
.308
33
.929
.438
28
.938
.609
23
.946
N/A
87
.784
.015
77
.824
.028
73
.837
.041
70
.846
.074
64
.863
.104
60
.873
.131
56
.880
.175
52
.890
.229
47
.899
.297
43
.908
.420
36
.919
.580
30
.930
10:1
12:1
14:1
17:1
POSITION ONLY
21:1
25:1
31:1
38:1
47:1
N/A
88
.730
.012
77
.778
.023
73
.794
.032
70
.805
.059
63
.825
.082
59
.837
.103
55
.846
.138
51
.858
.179
46
.869
.232
42
.880
.326
35
.895
.449
29
.908
N/A
87
.675
.010
76
.730
.018
72
.748
.026
68
.761
.048
62
.784
.066
57
.799
.083
54
.810
.110
49
.824
.143
45
.837
.185
40
.851
.259
34
.866
.355
28
.885
N/A
121
.629
.011
106
.688
.021
99
.709
.031
94
.722
.055
85
.749
.076
78
.765
.096
74
.777
.127
67
.793
.165
61
.808
.212
54
.823
.296
46
.844
.405
37
.863
N/A
120
.565
.009
104
.629
.018
97
.652
.025
92
.667
.045
82
.697
.062
76
.716
.077
71
.729
.103
65
.748
.132
58
.765
.170
52
.783
.236
43
.807
.321
35
.829
N/A
118
.514
.008
102
.580
.014
96
.604
.020
91
.620
.036
81
.651
.050
75
.672
.062
70
.686
.082
64
.707
.106
57
.726
.136
61
.746
.188
42
.772
.256
35
.798
N/A
17
.394
.006
101
.461
.012
94
.486
.017
90
.503
.030
80
.538
.041
74
.561
.052
69
.578
.068
63
.601
.088
56
.623
.112
50
.647
.155
42
.680
.210
34
.711
N/A
117
.351
.005
100
.414
.010
93
.439
.014
88
.456
.024
78
.490
.033
72
.513
.041
67
.530
.054
60
.554
.069
54
.577
.088
48
.602
.121
39
.636
.162
32
.670
N/A
116
.351
.004
99
.414
.008
92
.439
.011
87
.456
.019
77
.490
.026
70
.513
.033
66
.530
.043
59
.554
.055
53
.577
.070
47
.602
.096
38
.636
.129
31
.670
N/A
124
.304
.004
106
.364
.007
98
.387
.009
93
.404
.017
82
.437
.023
75
.459
.028
70
.477
.037
62
.500
.047
56
.524
.060
49
.549
.081
40
.585
.109
32
.621
0.428
0.379
15
33
0.428
0.387
15
33
0.428
0.386
10
30
0.428
0.411
10
30
0.428
0.385
10
30
0.428
0.368
10
30
0.428
0.422
10
30
0.428
0.395
10
30
0.428
0.380
10
28
1.542
1.251
0.680
1.548
0.569
0.758
1.621
1.237
0.604
1.631
0.546
0.680
1.683
1.139
0.538
1.691
0.380
0.626
1.744
1.143
0.475
1.754
0.369
0.567
1.767
1.120
0.472
1.785
0.358
0.531
1.786
1.108
0.466
1.809
0.352
0.503
1.835
1.126
0.411
1.857
0.353
0.459
1.846
1.115
0.415
1.874
0.349
0.440
1.869
1.015
0.394
1.891
0.347
0.420
Dimension Data
TQ equals
output0.244
torque in0.320
inch-lbs0.428
Center
Distance
Pinion Diameter 0.475 0.397 0.382
20
20
15
Pressure Angle - Lo
35
33
33
Pressure Angle - Hi
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
1.345
1.548
1.106
1.367
0.855
1.175
1.440
1.343
0.946
1.451
0.792
1.010
1.437
1.294
0.781
1.438
0.624
0.861
Note: Rating Note:
and reduction
Data intended
data provided
for general
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
change
canas
provide
application
recommendations
parameters become
for specific
further
application
defined needs.
24
Table 8
XX
1.875" O.D. Helicon
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.001
129
.893
.044
115
.914
.084
108
.921
.120
104
.926
.219
94
.934
.306
88
.939
.386
83
.943
.517
76
.948
.676
70
.952
.878
63
.957
1.243
54
.962
1.721
44
.967
N/A
128
.841
.029
113
.872
.055
106
.833
.079
102
.889
.143
92
.902
.200
86
.909
.251
81
.915
.336
74
.922
.437
67
.928
.566
61
.935
.798
51
.943
1.100
42
.951
N/A
165
.791
.028
146
.833
.053
137
.846
.076
131
.855
.137
118
.872
.191
110
.882
.240
103
.889
.320
94
.898
.415
86
.907
.535
77
.915
.751
65
.926
1.031
53
.936
N/A
169
.738
.023
147
.788
.043
138
.805
.061
131
.815
.110
118
.836
.152
109
.848
.190
102
.857
.253
93
.868
.327
85
.879
.421
76
.890
.587
63
.903
.803
52
.916
N/A
167
.684
.019
145
.741
.035
135
.761
.050
129
.773
.089
115
.797
.123
106
.812
.153
99
.822
.203
90
.836
.262
81
.849
.336
73
.862
.467
60
.879
.635
49
.894
N/A
178
.640
.017
153
.702
.031
143
.723
.044
136
.737
.079
121
.763
.109
111
.780
.135
104
.791
.179
95
.807
.231
85
.822
.295
76
.836
.409
63
.856
.556
51
.873
N/A
232
.574
.018
198
.643
.033
184
.667
.047
174
.683
.084
154
.713
.115
141
.732
.143
132
.746
.189
119
.764
.242
107
.781
.309
95
.798
.426
78
.821
.575
63
.824
N/A
229
.524
.014
195
.594
.027
181
.619
.038
171
.636
.067
152
.669
.092
139
.689
.115
130
.708
.151
117
.724
.194
105
.743
.246
93
.762
.339
77
.788
.457
62
.812
N/A
246
.478
.013
209
.549
.024
193
.575
.034
183
.593
.060
162
.626
.083
148
.648
.103
138
.664
.135
124
.686
.173
111
.706
.220
98
.727
.301
81
.755
.405
65
.782
N/A
228
.403
.010
191
.475
.018
176
.502
.025
166
.521
.045
146
.556
.061
133
.580
.076
123
.597
.099
110
.621
.126
98
.643
.159
86
.667
.217
71
.699
.289
56
.729
N/A
225
.359
.008
189
.429
.015
174
.455
.021
164
.473
.036
144
.509
.049
131
.533
.061
121
.550
.079
108
.575
.100
96
.598
.127
84
.623
.172
69
.657
.229
55
.690
N/A
241
.312
.007
202
.378
.013
186
.403
.018
175
.421
.031
153
.456
.042
138
.479
.052
128
.497
.067
114
.522
.086
101
.546
.108
89
.571
.146
72
.607
.193
57
.642
N/A
238
.272
.005
199
.332
.010
183
.356
.014
172
.373
.025
150
.406
.033
136
.429
.041
125
.447
.053
111
.471
.067
98
.495
.084
86
.521
.114
69
.557
.150
55
.594
0.400
0.486
20
33
0.536
0.466
15
33
0.536
0.463
15
33
0.536
0.473
15
33
0.536
0.457
15
30
0.536
0.502
10
30
0.536
0.470
10
30
0.536
0.457
10
28
0.536
0.516
10
30
0.536
0.482
10
30
0.536
0.463
10
28
0.536
0.439
10
28
1.135
1.079
0.768
1.143
0.641
0.818
1.138
1.042
0.636
1.139
0.512
0.699
1.225
1.004
0.552
1.229
0.462
0.614
1.290
0.992
0.489
1.297
0.441
0.550
1.332
0.905
0.448
1.336
0.427
0.510
1.390
0.915
0.385
1.398
0.298
0.451
1.409
0.895
0.381
1.423
0.288
0.428
1.436
0.818
0.354
1.445
0.283
0.404
1.465
0.900
0.331
1.483
0.283
0.369
1.474
0.891
0.333
1.496
0.280
0.353
1.493
0.811
0.317
1.510
0.278
0.337
1.501
0.806
0.317
1.520
0.277
0.325
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
0.305
0.589
20
35
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
1.065
1.240
0.890
1.083
0.689
0.944
“Note:
needs.”
25
1.875" Outside
Diameter
2.250" O.D.
Helicon– Helicon
Performance Ratings
1.875
RPM
" OD
Helicon
Output
4:1POSITION
6:1 ONLY
8:1
10:1
12:1
14:1
17:1
ONLY 38:1
21:1 POSITION
25:1 31:1
47:1
58:1
N/A
416
47
.363
.014
344
.437
.026
315
47:1
.465
N/A
.037
241
295
.312
.484
.007
.064
202
256
.378
.013
.522
186
.087
.403
232
.018
.546
175
.107
.421
214
.031
153
.564
.456
.139
.042
190
138
.588
.479
.176
.052
168
128
.612
.497
.067
.220
114
147
.522
.637
.086
.297
101
119
.546
.670
.108
89
.393
.571
94
.146
.702
N/A
411
58
.319
.011
339
.390
.021
310
58:1
.416
N/A
.029
238
290
.272
.435
.005
.051
199
252
.332
.010
.472
183
.069
.356
227
.014
.496
172
.085
.373
209
.025
150
.514
.406
.110
.033
186
136
.539
.429
.138
.041
164
125
.563
.447
.053
.173
111
142
.471
.589
.067
.233
98
115
.495
.624
.084
86
.306
.521
91
.114
.659
N/A
406
.278
.009
335
.343
.017
306
.369
.023
286
.386
.041
247
.422
.055
222
.445
.067
204
.463
.086
181
.488
.109
159
.513
.136
138
.539
.181
110
.575
.238
87
.611
0.642
0.566
15
0.536
30
0.642 0.642
0.642 0.642 0.642 0.642
0.536 0.590
0.551 0.536 0.607 0.580
15
10
10
10
10
10
0.536
0.536
0.536
30 0.536
30 0.536 30 0.536 280.536 30
28
0.642
0.543
10
0.536
28
0.642
0.514
10
28
1.084
0.779
0.392
1.082
1.290
0.992
0.373
0.489
0.460
1.107 1.157
1.173 1.196
0.756 0.763
0.747 0.682
0.379 0.325
0.321 0.299
1.110 1.390
1.163 1.409
1.185
1.332
1.4361.204
1.465
0.905
0.8180.237
0.900
0.359 0.915
0.251 0.895
0.242
0.448
0.3540.339
0.331
0.430 0.385
0.385 0.381
0.360
1.245
0.676
0.266
1.259
1.501
0.806
0.233
0.317
0.282
1.252
0.672
0.265
1.268
0.231
0.272
.001
N/A
N/A
N/A
N/A
N/A
N/A
N/A
HP Out
.001
Ratio
219
227
285 ITW Heartland
304
302 to 1 Input
395Speed 391
419
TQ Out
223
Output
10
12
14
17
RPM
.745
.688
.648
.582 21 .533 25 .48631
Efficiency
.895 4 .846 6 .7958
.050
.038
.038
.033
.028
.030
.024
.022
HP Out
.076
191
198
246
260
257
333
329
352
100
TQ Out
196
.878
.839
.797
.749
.713
.655
.607
.562
Efficiency
.917
Performance
Ratings
.093
.072 - 1.875
.071 " O.D.
.062 Helicon
.052
.056
.045
.040
HP Out
.142
179
185
230
241
239
307
304
200 RPM
TQ Out
184
Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1 324
31:1
.889
.853
.814
.769
.734
.679
.633
.589
Efficiency
.924
N/A .101
N/A
N/A
N/A
.088
.073 N/A
.079 N/A.063 N/A .057N/A
HP OutHP Out
.204 .001 .133N/A .102
1
169
167
178
228
226 232
290 229 286 246 305228
300
TQ OutTQ Out176 129 171128 177165 218
Efficiency
.893
.841
.791
.738
.684
.640
.574
.524
.478
.403
.782
.749 .018
.696 .014.650.013 .607.010
EfficiencyHP Out
.929 .044 .895.029 .862
.028 .825
.023
.019
.017
.156
.130 198
.139 195.111 209 .100191
HP OutTQ Out
.368 115 .239113 .184
100
146 .181
147
145
153
203
200 .643
255 .594 252 .549 268.475
600
TQ Out
Efficiency159 .914 154.872 159
.833 195
.788
.741
.702
.053 .845
.043
.035
.031
.806
.775 .033
.726 .027.683.024 .641.018
EfficiencyHP Out
.937 .084 .908.055 .878
200
137 .250
138
135
143
.215
.179 184
.190 181.152 193 .136176
HP OutTQ Out
.513 108 .333106 .255
.761
.723
.667
Efficiency
.921 143.833 147
.846 179
.805
186
184
233 .619 229 .575 244.502
900
TQ Out
147
HP Out
.120
.079
.076
.061
.050
.044
.047
.038
.034
.025
.915
.888
.857
.820
.791
.745
.704 183 .663166
Efficiency
.943
300
TQ Out
104
102
131
131
129
136
174
171
.268
.222 .683
.235 .636.189.593 .169.521
.644 .926 .417.889 .319
HP Out
Efficiency
.855 .311
.815
.773
.737
174
171 .084
216 .067213 .060 226.045
1200
TQ OutHP Out139 .219 134.143 138
.137 168
.110
.089
.079
600
TQ Out
118 .866
118
115
121
.831
.803 154
.759 152.719 162 .679146
.946 94 .920 92 .895
Efficiency
Efficiency
.872 .412
.836
.797
.763
.353
.292 .713
.308 .669.247.626 .221.556
.860 .934 .555.902 .424
HP Out
.191 152
.152
.123
.109
157
154 .115
194 .092 191 .083 203.061
1750
TQ OutHP Out127 .306 122.200 125
900
TQ Out
88
86
110
109
106
111
141
139
148
133
.927
.904
.877
.844
.818
.777
.738
.701
Efficiency
.951
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
.648
.580
.453
.375 .143
.394 .115.315.103 .281.076
HP OutHP Out
1.118.386 .719.251 .548
.240 .531
.190
.153
.135
141
139 132
174 130 171 138 180123
2500 1200
TQ OutTQ Out116 83 111 81 113103 137
102
99
104
.857
.833 .746
.793 .708.757.664 .721.597
Efficiency
.955 .943 .933.915 .912
Efficiency
.889 .887
.857
.822
.791
.320 .679
.253
.203
.179
.578
.478 .189
.499 .151.399.135 .355.099
HP OutHP Out
1.445.517 .927.336 .705
1750
TQ
Out
76
74
94
93
90
95
119
99
101
122
125
123
153 117 150 124 159110
104
3600
TQ Out
Efficiency
.898
.868
.836
.807
.897
.869
.847 .764
.810 .724.776.686 .741.621
.959 .948 .939.922 .920
Efficiency
HP Out
.676
.437
.415
.327
.262
.231
.242
.194
.173
.126
.798
.659
.684 105.546 111 .48498
2.031 70 1.29967 .98386 .943
HP OutTQ Out
2500
85
81
85
107
103
101 .781
126 .743123 .706 130.643
6000
TQ Out
Efficiency87 .952 84 .928 85.907 101
.879
.849
.822
.885
.865 .309
.832 .246.800.220 .769.159
.965 .878 .947.566 .931
EfficiencyHP Out
.535 .910
.421
.336
.295
3600
77 1.281
76
73
76
95
1.079
.889
.918 93 .731 98 .64786
2.794 63 1.78161 1.342
HP OutTQ Out
Efficiency72 .957 69 .935 69.915
.890
.862
.836
.798
83
84
82
101 .762 99 .727 104.667
10000
TQ Out
HP Out
1.243
.798
.751
.587
.467
.409
.426
.954
.940
.922
.900
.882
.852 .339.823.301 .794.217
.969
Efficiency
1
6000
TQ Out
54
51
.962
.943
TQ equals output Efficiency
torque in inch-lbs
HP Out 1.721
1.100
10000
TQ Out
44
42
Dimension
Data
Efficiency
.967
.951
65
.926
1.031
53
.936
63
.903
.803
52
.916
0.466
15
33
0.463
15
33
0.366 0.480 0.642 0.642
Center Distance
0.701 0.573 0.533 0.543
Pinion Diameter
Dimension
20
20
15
20
Pressure Angle
- Lo Data
Center
Distance35 0.305 330.400 33
0.536 33
0.536
Pressure Angle - Hi
Pinion Diameter
ToothPressure
Load Angle
Data- Lo
Pressure Angle - Hi
0.589
20
35
0.486
20
33
Fx 0.878 0.933 0.929
0.648 0.552
Fz 0.746
Tooth Load
Data
Fx Fx
0.8931.0650.940
1.135 0.927
1.138
Driving Side
Lo Side Hi
Driving
1.079 0.523
1.042
Fy Fy
0.5781.2400.540
0.768 0.597
0.636
Fz Fz
0.7910.8900.689
1.015
0.847
0.467
1.019
1.225
1.004
0.391
0.552
0.518
Fx 1.083
1.143
1.139
1.229
Driving Side Lo
Tooth load componentsFy
equals
lbs./inch-lb.
0.689
0.641 output
0.512 torque
0.462
Fz 0.944
0.818
0.699
0.614
60
.879
.635
49
.894
0.473
15
33
1.297
0.441
0.550
63
.856
.556
51
.873
78
.821
.575
63
.824
77
.788
.457
62
.812
81
.755
.405
65
.782
71
.699
.289
56
.729
0.457
15
30
0.502
10
30
0.470
10
30
0.457
10
28
0.516
10
30
1.336
0.427
0.510
1.398
0.298
0.451
1.423
0.288
0.428
1.445
0.283
0.404
1.483
0.283
0.369
N/A
389
38
.410
.016
322
.487
.030
295
38:1
.516
N/A
.042
225
277
.359
.535
.008
.074
189
241
.429
.015
.520
174
.100
.455
218
.021
.595
164
.124
.473
202
.036
144
.613
.509
.161
.049
180
131
.637
.533
.204
.061
159
121
.659
.550
.079
.256
108
139
.575
.682
.100
.347
96
113
.598
.714
.127
84
.461
.623
90
.172
.743
69
.657
.229
55
.690
0.482
10
30
1.221
0.751
0.278
1.236
1.474
0.891
0.237
0.333
0.309
1.496
0.280
0.353
72
.607
.193
57
.642
0.463
10
28
1.238
0.683
0.263
1.249
1.493
0.811
0.234
0.317
0.294
1.510
0.278
0.337
69
.557
.150
55
.594
0.439
10
28
1.520
0.277
0.325
Note: Rating Note:
and reduction
data provided
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
canas
provide
recommendations
for specific
application
Data intended
for general
change
application
parameters become
further
defined needs.
26
Table 8
XX
3.000" O.D. Helicon
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.002
549
.902
.184
475
.925
.344
443
.932
.491
421
.936
.879
377
.944
1.215
348
.949
1.518
326
.953
2.012
296
.957
2.597
267
.961
3.334
238
.965
4.641
199
.969
6.328
163
.974
.001
511
.853
.114
439
.887
.212
409
.897
.301
388
.904
.537
346
.916
.741
318
.923
.924
297
.928
1.221
269
.935
1.572
243
.940
2.012
216
.946
2.790
179
.953
3.789
146
.960
.001
518
.804
.086
445
.850
.160
414
.864
.227
392
.873
.404
348
.889
.556
320
.899
.692
298
.905
.913
269
.914
1.171
242
.921
1.495
215
.929
2.064
178
.938
2.793
144
.946
.001
655
.756
.086
556
.811
.159
514
.828
.225
485
.839
.398
429
.859
.546
392
.870
.677
364
.879
.889
328
.889
1.136
294
.899
1.445
259
.908
1.985
214
.920
2.672
173
.930
.001
704
.700
.076
589
.765
.140
543
.785
.197
511
.798
.346
448
.822
.472
408
.836
.584
378
.846
.764
339
.859
.973
303
.871
1.233
266
.883
1.685
218
.897
2.258
175
.910
.001
702
.661
.063
586
.730
.117
539
.752
.164
507
.767
.288
444
.793
.393
404
.809
.486
374
.821
.635
335
.835
.807
299
.849
1.022
262
.862
1.394
215
.879
1.865
172
.894
.001
921
.595
.069
759
.673
.126
695
.699
.177
651
.716
.308
566
.747
.418
512
.765
.515
473
.779
.669
422
.796
.847
374
.812
1.067
327
.828
1.448
266
.848
1.926
212
.866
.001
914
.546
.055
751
.627
.101
687
.654
.142
643
.672
.247
559
.705
.335
505
.726
.413
466
.741
.536
415
.760
.678
368
.778
.853
321
.796
1.155
261
.819
1.534
208
.840
.001
979
.500
.050
803
.583
.091
733
.611
.128
686
.630
.222
594
.666
.300
536
.688
.369
494
.704
.479
440
.725
.605
389
.744
.759
339
.764
1.025
275
.790
1.358
218
.814
N/A
909
.422
.038
734
.508
.068
666
.538
.095
620
.558
.164
533
.597
.220
478
.621
.270
439
.639
.348
388
.662
.437
341
.685
.545
296
.707
.731
238
.737
.962
188
.765
N/A
973
.374
.033
784
.457
.059
711
.487
.083
661
.508
.142
566
.547
.191
507
.572
.233
456
.590
.300
410
.615
.376
360
.639
.468
311
.663
.625
249
.695
.819
196
.726
N/A
960
.330
.026
773
.409
.047
700
.438
.066
650
.458
.112
555
.497
.151
497
.523
.184
454
.541
.236
400
.567
.295
350
.591
.367
302
.617
.488
241
.651
.638
189
.684
N/A
1031
.286
.023
828
.360
.041
747
.388
.057
693
.407
.097
589
.445
.129
525
.470
.157
479
.489
.201
420
.515
.251
367
.540
.310
315
.566
.410
250
.602
.533
195
.637
0.641
0.744
20
33
0.857
0.687
20
33
0.857
0.700
15
33
0.857
0.731
15
30
0.857
0.691
15
30
0.857
0.763
10
30
0.857
0.711
10
30
0.857
0.690
10
28
0.857
0.785
10
30
0.857
0.750
10
28
0.857
0.700
10
28
0.857
0.674
10
25
0.685
0.682
0.496
0.689
0.413
0.526
0.687
0.658
0.425
0.685
0.403
0.457
0.753
0.635
0.358
0.756
0.301
0.396
0.807
0.587
0.300
0.806
0.284
0.350
0.825
0.569
0.289
0.827
0.273
0.327
0.864
0.573
0.247
0.869
0.191
0.292
0.877
0.561
0.244
0.885
0.183
0.273
0.894
0.511
0.227
0.900
0.179
0.257
0.914
0.563
0.210
0.925
0.179
0.257
0.927
0.512
0.199
0.935
0.176
0.222
0.932
0.507
0.200
0.943
0.175
0.213
0.943
0.507
0.200
0.950
0.174
0.204
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
0.487
0.903
20
35
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
0.621
0.761
0.579
0.633
0.431
0.607
27
1.875" Outside
Diameter
3.750" O.D.
Helicon– Helicon
Performance Ratings
ONLY
RPM
Output
6:1
8:1
10:1
1.875 " OD
Helicon 4:1POSITION
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
ONLY 38:1
21:1 POSITION
25:1 31:1
47:1
58:1
.004
.003
.002
.002
.002
.001
.002
.001
.001
.001
.001
HP Out
Heartland 1345
Ratio to 1 Input
1071
983
979
1246 ITW1344
1772Speed1904
1887
1754
1877
TQ Out
Output
10
12
14
17
38
47
RPM
.904 4 .858 6 .8108
.764
.709
.670
.605 21.552 25 .51031 .431
.383
Efficiency
.355
.216
.160
.161
.142
.119
.130
.113
.094
.071
.062
HP Out
912
834
829
1040
1107
1104
1432
1533
1517
1386
1480
TQ Out
.928
.894
.858
.821
.777
.743
.688
.639
.599
.524
.473
Efficiency
Performance
Ratings
.658
.400
.297 - 1.875
.296 " O.D.
.261 Helicon
.218
.236
.205
.171
.128
.111
HP
Out
847 4:1 772 6:1 7678:1 956
1009 17:1
1301 21:1
139125:11375
TQ OutOutput
RPM
10:1 1013
12:1
14:1
31:1 1248
38:1 1330
47:1
.936
.904
.872
.838
.798
.766
.714
.668
.629
.555
.505
Efficiency
N/A
N/A
N/A
N/A
N/A
.934 .001.567 N/A .420N/A .417
.366
.306 N/A
.330 N/A.287 N/A .239N/A .177
.154
HP OutHP Out
1TQ OutTQ Out
169
167
178
232
225 1229
241
948
944
1212 2291294 246 1279228 1155
801 129 729 128 723165 898
Efficiency
.893
.841
.791
.738
.684
.640
.574
.524
.478
.403
.359
.312
.940
.911
.881
.849
.811
.781
.731
.686
.648
.576
.526
Efficiency
HP Out
.044
.029
.028
.023
.019
.017
.018
.014
.013
.010
.008
.007
1.655
1.001
.739
.730
.636
.531
.567
.492
.409
.301
.261
HP
Out
100
TQ Out
115
113
146
147
145
153
198
195
209
191
189
202
710 .914 644 .872 637.833 786
824
818 .643
1043 .5941112 .549 1097.475 981
TQ Out
Efficiency
.788
.741
.702
.429 1041
.378
.948 .084.923.055 .897
.834
.807 .033
.762 .027.720 .024 .684.018 .616
.567
EfficiencyHP Out
.053 .869
.043
.035
.031
.015
.013
200
137 .994
138
135
143
174
186
2.276 1081.374106 1.012
.863
.720 184
.765 181.663 193 .551176 .403
.348
HP OutTQ Out
.761
.723
.455
.403
Efficiency
.805
6511 .921 589 .833 581.846 714
745
740 .667
938 .619998 .575 984.502 875
926
TQ Out
.076
.061
.050
.044
.021
.018
.953 .120.929.079 .906
.880
.848
.823 .047
.780 .038.740 .034 .706.025 .640
.592
EfficiencyHP Out
300
TQ Out
104
102
131
131
129
136
174
171
183
166
164
175
2.831.9261.705.889 1.253
.886 .683
.938 .636.812 .593 .674.521 .491
HP Out
Efficiency
.855 1.228
.815 1.063
.773
.737
.473 .423
.421
607 .219 549 .143 540.137 661
689
683 .084
863 .067916 .060 902.045 799
845
TQ OutHP Out
.110
.089
.079
.036
.031
.956 94 .934 92 .913118 .888
.858
.833
.793 152.755 162 .722146 .658
.611
Efficiency
600
TQ Out
118
115
121
154
144
153
Efficiency
.872 1.603
.836 1.382
.797
.763
.713
.509
.456
1.150
1.212 .669
1.047.626 .868.556 .628
.541
3.728.9342.241.902 1.642
HP Out
.152
.123
.109
.049
.042
548 .306 494 .200 485.191 592
614
608 .115
764 .092811 .083 797.061 702
740
TQ OutHP Out
900
TQ
Out
88
86
110
109
106
111
141
139
148
133
131
138
.960
.940
.921
.898
.870
.848
.810
.774
.842
.682
.636
Efficiency
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
.648
.580
.533
.479
4.783.3862.868.251 2.096
2.038
1.750
1.456
1.527
1.316
1.090
.785
.674
HP OutHP Out
.240
.190
.153
.135
.143
.115
.103
.076
.061
.052
492 83 443 81 433103 527
544
538
674 130714 138 701123 613
646
TQ OutTQ Out
121
128
1200
102
99
104
132
.964 .943.946.915 .928
.881
.860 .746
.825 .708.791 .664 .761.597 .703
.659
Efficiency
Efficiency
.889 .907
.857
.822
.791
.550
.497
.320 2.577
.253 2.204
.203
.179
.189
.099 .975
.079 .835
.067
6.101.5173.651.336 2.660
1.831
1.912 .151
1.646.1351.361
HP OutHP Out
1750
93
90
95
119
108
114
436 76 391 74 38294 462
476
470
586 117619 124 608110 529
556
TQ OutTQ Out
Efficiency
.898 .916
.868
.836
.807
.575 .683
.522
.967 .948.951.922 .935
.892
.873 .764
.840 .724.808 .686 .780.621 .725
Efficiency
HP Out
.676
.437
.415
.327
.262
.231
.242
.194
.173
.126
.100
.086
8.424 5.024 3.647 3.514 2.991 2.481 2.575 2.211 1.825 1.297 1.107
HP Out
2500
TQ Out
70
67
86
85
81
85
107
105
111
98
96
101
361
323
314
378
388
382
473
499
489
422
442
TQ Out
Efficiency
.952
.928
.907
.879
.849
.822
.781
.743
.706
.643
.598
.546
.906
.889 .309
.860 .246.831 .220 .805.159 .754
.714
.972 .878.957.566 .943
EfficiencyHP Out
.535 .927
.421
.336
.295
.127
.108
3.982
3.298
3.405 932.915 98 2.40286 1.695
1.443
HP OutTQ 11.400
3600
Out
63 6.77861 4.901
77 4.700
76
73
76
95
84
89
.623
.571
Efficiency
.890
.862
.836
293 .957 262 .935 253.915 304
310
305 .798
376 .762395 .727 386.667 331
345
TQ Out
.751 .936
.587
.467
.409
.172 .743
.146
.976 1.243.963.798 .951
.918
.903 .426
.877 .339.850 .301 .827.217 .780
EfficiencyHP Out
.001
1850
58
.339
.049
1458
.425
.088
1308
58:1
.456
N/A
.122
238
1208
.272
.477
.005
.207
199
1020
.332
.518
.010
183
.275
.356
906
.014
.544
172
.334
.373
825
.025
.563
150
.406
.426
.033
721
136
.588
.429
.529
.041
627
125
.613
.447
.053
.654
111
538
.471
.638
.067
.864
98
426
.495
.672
.084
1.121
86
.521
332
.114
.703
.001
1987
.294
.043
1559
.375
.076
1395
.405
.105
1285
.425
.177
1081
.465
.235
956
.491
.285
868
.510
.362
756
.536
.448
655
.562
.551
560
.588
.724
441
.623
.934
341
.657
1.071
0.852
10
0.536
28
1.071
0.820
10
25
0.406
0.161
0.754
1.501
0.140
0.806
0.317
0.171
0.754
0.367
0.153
0.760
0.140
0.164
6000
TQ Out
54
51
Efficiency
.962
.943
TQ equals output torque
in inch-lbs
HP Out 1.721
1.100
10000 Data
TQ Out
44
42
Dimension
Efficiency
.967
.951
65
.926
1.031
53
.936
12:1
63
.903
.803
52
.916
60
.879
.635
49
.894
0.589
0.486
0.466
0.463
20
20
15
15
Pressure Fx
Angle -0.489
Hi
350.53833 0.543
33 0.598
33
0.473
15
33
0.642
0.609 0.801 1.071 1.071 1.071
Center Distance
1.117 0.910 0.836 0.853 0.891
Pinion Diameter
Dimension
20
20
20
15
15
Pressure Angle
- Lo Data
Center
Distance35 0.305 33 0.400 330.536 33
0.536
0.536
30
Pressure Angle - Hi
Pinion Diameter
ToothPressure
Load Data
Angle - Lo
Tooth Fz
Load0.467
Data 0.403 0.347
0.542
Fx 0.499
Fx
1.065
1.1350.541
1.138
Driving Side
Lo Side Hi
Driving
0.336
Fy 0.348
Fy 1.240
1.0790.330
1.042
Fz 0.890
0.7680.372
0.636
0.426
Fz 0.489
0.511
0.291
0.600
1.225
0.246
1.004
0.552
0.321
0.471
0.244
0.641
1.290
0.231
0.992
0.489
0.284
Fx 1.083
1.143
1.139
1.229
Side Lo equals lbs./inch-lb. output torque
Tooth loadDriving
components
Fy 0.689
0.641
0.512
0.462
Fz 0.944
0.818
0.699
0.614
1.297
0.441
0.550
14:1
63
.856
.556
51
.873
17:1
78
.821
.575
63
.824
77
.788
.457
62
.812
81
.755
.405
65
.782
71
.699
.289
56
.729
69
.657
.229
55
.690
72
.607
.193
57
.642
1.071 1.071 1.071 1.071 1.071 1.071
0.842 0.931 0.887 0.840 0.959 0.914
15
10
10
10
10
10
0.536
0.536
0.536
0.536
30
30 0.53628 0.536 280.536 30
28
69
.557
.150
55
.594
0.457
0.502
0.470
0.457
0.516
0.482
0.463
15
10
10
10
10
10
10
30
30
30
28
0.657
0.690 300.706 28 0.71330 0.731
0.741
0.439
10
28
0.745
1.336
0.427
0.510
1.520
0.277
0.325
0.456 0.460 0.417 0.409 0.451
0.234 0.200 0.185 0.184 0.169
0.659 1.390
0.693 1.409
0.7091.4360.718
1.332
1.465 0.739
1.474
0.220 0.915
0.155 0.895
0.1480.8180.145
0.905
0.900 0.144
0.891
0.448
0.331 0.188
0.333
0.265 0.385
0.236 0.381
0.2190.3540.207
1.398
0.298
0.451
1.423
0.288
0.428
1.445
0.283
0.404
1.483
0.283
0.369
1.496
0.280
0.353
0.410
0.160
0.748
1.493
0.142
0.811
0.317
0.178
1.510
0.278
0.337
Note: Rating Note:
and reduction
Data intended
data provided
for general
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
change
canas
provide
application
recommendations
parameters become
for specific
further
application
defined needs.
28
Table 8
XX
4.500" O.D. Helicon
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
6000
10000
Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.007
1848
.906
.606
1554
.931
1.114
1434
.939
1.574
1351
.943
2.770
1188
.951
3.789
1083
.956
4.694
1007
.959
6.150
904
.963
7.852
808
.966
9.968
713
.969
13.673
586
.974
18.371
473
.977
.004
1678
.862
.364
1405
.899
.671
1294
.909
.946
1218
.916
1.660
1068
.927
2.267
972
.934
2.805
902
.939
3.668
809
.944
4.674
722
.950
5.922
635
.954
8.102
521
.961
10.870
420
.966
.003
1644
.816
.266
1375
.865
.489
1265
.879
.689
1188
.888
1.205
1038
.903
1.642
943
.912
2.027
873
.918
2.643
781
.926
3.359
694
.933
4.244
609
.939
5.784
498
.945
7.732
400
.955
.003
2246
.767
.286
1845
.827
.522
1685
.845
.732
1576
.856
1.270
1367
.875
1.721
1235
.886
2.117
1140
.894
2.748
1014
.904
3.476
898
.912
4.373
785
.920
5.925
638
.931
7.880
509
.940
.003
2280
.716
.238
1849
.787
.433
1681
.808
.605
1568
.821
1.043
1351
.844
1.409
1217
.857
1.728
1119
.867
2.235
993
.879
2.819
876
.889
3.534
763
.899
4.768
618
.912
6.316
491
.923
.002
2287
.678
.200
1848
.754
.363
1678
.777
.507
1563
.792
.873
1345
.818
1.178
1210
.833
1.444
1112
.844
1.865
985
.857
2.349
869
.869
2.942
755
.881
3.963
611
.896
5.241
484
.909
.003
3022
.613
.218
2401
.700
.393
2167
.727
.547
2010
.744
.933
1715
.774
1.252
1534
.792
1.529
1405
.805
1.965
1239
.821
2.464
1087
.836
3.072
941
.850
4.113
756
.868
5.410
597
.884
.002
3252
.560
.190
2574
.652
.342
2319
.681
.476
2148
.700
.810
1829
.733
1.085
1633
.754
1.323
1494
.768
1.698
1315
.787
2.126
1152
.803
2.645
996
.820
3.533
798
.841
4.636
628
.860
.002
3224
.519
.159
2548
.613
.285
2293
.643
.396
2123
.663
.674
1805
.699
.902
1610
.721
1.099
1472
.736
1.408
1293
.756
1.761
1132
.775
2.188
977
.793
2.917
781
.816
3.820
614
.838
.002
2999
.439
.119
2326
.537
.213
2078
.570
.294
1914
.592
.495
1611
.632
.658
1428
.656
.798
1299
.674
1.017
1135
.697
1.264
988
.718
1.562
848
.739
2.067
673
.767
2.689
525
.792
.001
3208
.391
.104
2482
.487
.185
2214
.520
.255
2036
.542
.428
1709
.583
.568
1512
.609
.688
1373
.628
.875
1197
.652
1.085
1039
.675
1.337
890
.698
1.763
704
.729
2.286
547
.757
.001
3163
.346
.082
2444
.438
.147
2176
.471
.202
1999
.493
.339
1673
.534
.449
1476
.561
.542
1339
.580
.688
1164
.606
.851
1008
.630
1.046
861
.655
1.374
678
.687
1.773
525
.718
.001
3395
.301
.082
2612
.388
.147
2319
.419
.202
2125
.441
.339
1769
.482
.449
1556
.508
.542
1407
.528
.688
1219
.554
.851
1051
.580
1.046
894
.605
1.374
700
.640
1.773
539
.673
0.961
1.073
20
33
1.285
0.981
20
33
1.285
1.023
15
30
1.285
1.048
15
30
1.285
0.989
15
30
1.285
1.096
10
30
1.285
1.043
10
28
1.285
0.986
10
28
1.285
1.129
10
30
1.285
1.075
10
28
1.285
1.001
10
28
1.285
0.962
10
25
0.442
0.460
0.340
0.445
0.284
0.359
0.447
0.447
0.294
0.446
0.281
0.314
0.503
0.404
0.236
0.501
0.209
0.268
0.533
0.394
0.206
0.532
0.195
0.239
0.545
0.381
0.198
0.547
0.182
0.223
0.573
0.384
0.168
0.576
0.131
0.198
0.587
0.348
0.156
0.589
0.125
0.184
0.594
0.341
0.154
0.598
0.121
0.174
0.609
0.376
0.142
0.616
0.120
0.157
0.617
0.342
0.134
0.623
0.119
0.149
0.621
0.338
0.135
0.628
0.117
0.143
0.628
0.306
0.128
0.633
0.117
0.137
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
0.730
1.329
20
35
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
0.402
0.510
0.392
0.410
0.293
0.409
29
1.875" Outside
Diameter
5.250" O.D.
Helicon– Helicon
Performance Ratings
1.875
RPM
1
100
200
300
600
900
1200
1750
2500
3600
" OD
Helicon
Output
4:1POSITION
6:1 ONLY
8:1
10:1
12:1
14:1
17:1
ONLY 38:1
21:1 POSITION
25:1
31:1
.011
.007
.005
.005
.005
.004
.004
.004
.003
HP Out
Heartland 3581
Ratio to 1 Input
Speed5114
2932 2631
2548
3488 ITW 3561
4744
5073
TQ Out
Output
10
12
14
17.620 21 .567 25 .52631
RPM
.908 4 .866 6 .8208
.773
.723
.620
Efficiency
.946
.565
.408
.438
.367
.309
.337
.294
.246
HP Out
2435 2180
2107
2830
2849
2854
3713
3986
3947
TQ Out
.934
.903
.870
.834
.795
.710
.710
.663
.624
Efficiency
Performance
Ratings
HP Out
1.738 1.036
.746 - 1.875
.797 " O.D.
.663 Helicon
.558
.604
.527
.440
TQ Out
2237 4:119996:1 1928
25779
3332 21:1357025:1 3532
RPM
Output
8:1 2573
10:1 2578
12:1
14:1
17:1
31:1
.941
.914
.885
.852
.816
.737
.737
.692
.655
Efficiency
N/A 1.114
N/A
N/A
N/A
2.447.0011.457N/A 1.048
.924
.777 N/A
.837 N/A.729 N/A .608N/A
HP OutHP Out
1
TQ Out
165
169
167
178
232
2398
2395
2393
3078 2293294246 3257228
2099 129 1875128 1805
TQ Out
Efficiency
.893
.841
.791
.738
.684
.640
.574
.524
.478
.403
.946 .044 .920.029 .893
.829
.754 .018
.754 .014.711 .013 .675.010
EfficiencyHP Out
.028 .863
.023
.019
.017
4.2761152.541113 1.820
1.582
1.327
1.419 1951.233209 1.026
HP OutTQ Out
100
146 1.192
147
145
153
198
191
1834.9141635.872 1568
2050
2045 .643
2608 .5942784.549 2748
TQ Out
Efficiency
.833 2066
.788
.741
.702
.475
.053 .882
.043
.035
.031
.953 .084 .931.055 .908
.852
.785 .033
.785 .027.745 .024 .711.018
EfficiencyHP Out
200
137 2.589
138
135
143
184
176
HP OutTQ Out
5.8231083.455106 2.468
2.127
1.783
1.895 1811.644193 1.366
.761
.723
.667
.619
.575
.502
Efficiency
.921
.833
.846
.805
TQ Out
1665 1482
1417
1859
1837
1831
2322
2475
2440
HP Out
.120
.079
.076
.061
.050
.044
.047
.038
.034
.025
.958 104 .938102 .917
.892
.865
.802 174
.802 171.765 183 .733166
Efficiency
300
TQ Out
131
131
129
136
7.190.9264.262.889 3.038
2.178
2.307 .6361.998.593 1.660
HP Out
Efficiency
.855 3.175
.815 2.602
.773
.737
.683
.521
1542.2191371.143 1309
1685
1678 .084
2120 .0672256.060 2223
TQ OutHP Out
.137 1709
.110
.089
.079
.045
600
TQ Out
118 .900
118
115
121
.961 94 .942 92 .923
.874
.815 154
.815 152.779 162 .748146
Efficiency
Efficiency
.872 4.105
.836
.797
.763
.713
.556
9.380.9345.551.902 3.946
3.351
2.802
2.953 .6692.553.626 2.118
HP Out
.191 1515
.152
.123
.109
.061
1379.3061225.200 1165
1489
1480 .115
1861 .0921977.083 1945
TQ OutHP Out
900
TQ Out
88
86
110
109
106
111
141
139
148
133
.965
.948
.930
.909
.885
.831
.831
.797
.768
Efficiency
Efficiency
.939
.909
.882
.848
.812
.780
.732
.689
.648
.580
11.926.3867.048.251 4.996
3.517
3.688 .1153.184.103 2.638
HP OutHP Out
.240 5.174
.190 4.210
.153
.135
.143
.076
1228 83 1088 81 1033
1309
1300
1627 1301726 138 1696123
TQ OutTQ Out
1200
103 1337
102
99
104
132
.968 .943 .953.915 .937
.895
.845 .746
.845 .708.813 .664 .786.597
Efficiency
.889 .917
.857
.822
.791
Efficiency
.320 6.485
.253 5.259
.203
.179
.189
.099
15.077.5178.897.336 6.288
4.388
4.581 .1513.947.135 3.266
HP OutHP Out
1750
TQ
Out
76
74
94
93
90
95
119
117
124
1078
954
903
1164
1136
1127
1404
1486
1458110
TQ Out
Efficiency
.898
.868
.836
.807
.971 .948 .957.922 .943
.925
.905
.858 .764
.858 .724.829 .686 .803.621
Efficiency
HP Out
.676
.437
.415
.327
2500 torque
TQ Outin inch-lbs
70
67
86
85
TQ equals output
Efficiency
.952
.928
.907
.879
HP Out
.878
.566
.535
.421
Dimension Data
3600
TQ Out
63
61
77
76
0.852.9571.121.935 1.500
Center Distance
Efficiency
.915 1.500
.890
.751 1.172
.587
1.5391.2431.232.798 1.124
Pinion DiameterHP Out
TQ Out20 54 20 51 20 65
1563
Pressure 6000
Angle - Lo
.903
35 .962 33 .943 33.926
30
Pressure Angle - Efficiency
Hi
HP Out 1.721
1.100
1.031
.803
TQ Out
44
42
53
52
Tooth10000
Load Data
Efficiency
.967
.951
.936
.916
Fx 0.341 0.373 0.380
Driving Side
TQHi
equals
in inch-lbs
0.438torque
0.397
0.386
Fy output
0.338
Fz Data
Dimension
0.295
0.256
0.428
0.349
0.205
Center Fx
Distance
0.400 0.379
0.536 0.427
0.536
0.3480.3050.376
Driving SidePinion
Lo Diameter 0.589 0.486 0.466 0.463
Fy 0.253 0.247 0.245 0.182
Pressure Angle - Lo
15
15
0.232
Fz 0.353 20 0.31120 0.272
Pressure Angle - Hi
35
33
33
33
.002
5050
47
.397
.160
3841
.499
.284
3404
47:1
.533
N/A
.390
241
3117
.312
.556
.007
.650
202
2595
.378
.013
.597
186
.859
.403
2285
.018
.623
175
1.036
.421
2068
.031
153
.642
.456
1.312
.042
1795
138
.666
.479
1.620
.052
1552
128
.689
.497
.067
.199
114
1324
.522
.711
.262
81
.849
.336
73
1.500
.862
.467
1.202
60
15
.879
30
.635
49
.894
.231
85
.822
.295
76
1.500
.836
.409
1.133
63
15
.856
30
.556
51
.873
.194
.173
.126
.100
105
111
98
96
.743
.706
.643
.598
.246
.220
.159
.127
93
98
86
84
1.500.727 1.500
.762
.667 1.500
.623
.3391.197.301 1.130
.217 1.085
.172
77 10 81 10 71
1069
.788 28 .755 28.699
.657
25
.457
.405
.289
.229
62
65
56
55
.812
.782
.729
.690
.086
101
.546
.108
89
1.500
.571
.146
1.233
72
10
.607
28
.193
57
.642
0.536
0.454
0.473
0.169
15
0.206
0.536
0.536 0.520
0.536
0.467 0.536
0.493 0.536
0.5040.5360.511
0.457
0.516 0.102
0.482
0.160 0.502
0.113 0.470
0.1080.4570.105
15
10
10
0.193
0.171 100.158 10 0.15010 0.140
30
30
30
28
30
30
0.536
0.533
0.463
0.102
10
0.128
0.455
0.339
0.178
33
0.466
0.328
0.171
.242
107
.781
.309
95
1.500
.798
.426
1.258
78 10
.82130
.575
63
.824
.003
5438
38
.471
.212
4212
.570
.379
3761
38:1
.603
N/A
.523
225
3462
.359
.624
.008
.880
189
2911
.429
.015
.663
174
1.169
.455
2579
.021
.686
164
1.417
.473
2345
.036
144
.703
.509
1.805
.049
2047
131
.725
.533
2.242
.061
1780
121
.745
.550
.079
2.769
108
1527
.575
.765
0.490
0.329
0.145
0.503
0.298
0.134
0.508
0.293
0.133
0.518
0.265
0.124
0.528
0.293
0.115
28
47:1
58:1
.002
5416
58
.349
.139
4104
.447
.245
3627
58:1
.480
N/A
.336
238
3316
.272
.503
.005
.557
199
2749
.332
.010
.546
183
.733
.356
2413
.014
.573
172
.883
.373
2180
.025
150
.592
.406
1.114
.033
1886
136
.618
.429
1.372
.041
1626
125
.642
.447
.053
1.680
111
1382
.471
.666
.001
5342
.307
.110
4037
.399
.195
3560
.432
.267
3247
.454
.440
2681
.497
.578
2346
.524
.694
2114
.543
.873
1823
.570
1.071
1566
.595
1.307
1327
.620
.067
98
.495
.084
86
1.500
.521
.114
1.176
69
10
.557
25
.150
55
.594
1.500
1.101
10
25
0.535
0.265
0.109
0.538
0.262
0.110
0.536
0.539
0.439
0.101
10
0.122
28
0.543
0.100
0.117
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
1.065
1.240
0.890
1.083
0.689
0.944
1.135
1.079
0.768
1.143
0.641
0.818
1.138
1.042
0.636
1.139
0.512
0.699
1.225
1.004
0.552
1.229
0.462
0.614
1.290
0.992
0.489
1.297
0.441
0.550
1.332
0.905
0.448
1.336
0.427
0.510
1.390
0.915
0.385
1.398
0.298
0.451
1.409
0.895
0.381
1.423
0.288
0.428
1.436
0.818
0.354
1.445
0.283
0.404
1.465
0.900
0.331
1.483
0.283
0.369
1.474
0.891
0.333
1.496
0.280
0.353
1.493
0.811
0.317
1.510
0.278
0.337
1.501
0.806
0.317
1.520
0.277
0.325
Note: Rating Note:
and reduction
Data intended
data provided
for general
forreference
referencepurposes
purposesonly
only;and
ITWmay
Spiroid
change
canas
provide
application
recommendations
parameters become
for specific
further
application
defined needs.
30
Table 8
XX
6.000" O.D. Helicon
Performance Ratings
RPM
1
100
200
300
600
900
1200
1750
2500
3600
Output
4:1
6:1
8:1
10:1
12:1
14:1
17:1
21:1
25:1
31:1
38:1
47:1
58:1
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
HP Out
TQ Out
Efficiency
.017
4373
.909
1.396
3592
.936
2.552
3284
.943
3.582
3072
.948
6.219
2667
.955
8.437
2412
.960
10.387
2228
.963
13.498
1985
.966
17.100
1760
.970
21.543
1540
.973
.010
3886
.869
.826
3188
.907
1.509
2912
.917
2.116
2723
.924
3.668
2360
.935
4.971
2132
.941
6.115
1967
.945
7.938
1751
.951
10.045
1551
.955
12.639
1355
.960
.007
3717
.823
.589
3043
.875
1.073
2772
.889
1.502
2587
.898
2.594
2234
.913
3.505
2013
.921
4.302
1853
.927
5.568
1644
.934
7.027
1453
.940
8.816
1266
.946
.008
5108
.777
.634
4097
.840
1.148
3707
.858
1.599
3444
.868
2.739
2949
.887
3.683
2643
.897
4.504
2425
.905
5.802
2142
.914
7.290
1884
.922
9.107
1634
.929
.007
5259
.743
.543
4194
.813
.891
3788
.833
1.366
3515
.845
2.334
3003
.866
3.133
2688
.878
3.828
2463
.870
4.925
2173
.897
6.179
1908
.906
7.710
1653
.915
.006
5273
.691
.449
4151
.772
.807
3732
.795
1.120
3452
.809
1.903
2932
.834
2.546
2615
.849
3.103
2390
.859
3.978
2101
.872
4.976
1840
.883
6.189
1589
.894
.005
5634
.649
.404
4410
.736
.724
3956
.762
1.004
3655
.778
1.700
3095
.806
2.270
2755
.823
2.763
2515
.834
3.536
2207
.848
4.415
1929
.861
5.483
1664
.874
.006
7558
.574
.429
5809
.672
.764
5176
.702
1.054
4760
.721
1.769
3996
.755
2.350
3538
.774
2.849
3217
.778
3.627
2809
.806
4.508
2444
.822
5.572
2097
.837
.005
7502
.533
.358
5756
.634
.638
5124
.666
.879
4708
.686
1.473
3946
.722
1.954
3490
.743
2.367
3170
.758
3.010
2764
.778
3.736
2402
.795
4.612
2059
.812
.004
8044
.477
.309
6142
.581
.549
5454
.614
.756
5003
.635
1.263
4179
.674
1.671
3687
.698
2.021
3343
.715
2.563
2908
.736
3.174
2521
.756
3.908
2155
.775
.003
7475
.403
.234
5596
.509
.412
4930
.544
.563
4498
.567
.932
3719
.610
1.225
3260
.635
1.474
2942
.654
1.859
2544
.678
2.289
2193
.700
2.803
1865
.722
.003
8017
.354
.202
5977
.457
.355
5252
.492
.484
4782
.515
.797
3936
.556
1.045
3440
.585
1.255
3098
.605
1.577
2670
.630
1.936
2294
.654
2.363
1945
.678
.002
7904
.312
.161
5876
.409
.282
5150
.443
.384
4679
.466
.629
3834
.509
.823
3341
.537
.985
3001
.556
1.234
2578
.583
1.510
2207
.608
1.836
1864
.633
1.282
1.390
20
33
1.714
1.264
20
33
1.714
1.320
15
30
1.714
1.244
15
30
1.714
1.274
15
30
1.714
1.233
15
28
1.714
1.347
10
28
1.714
1.271
10
28
1.714
1.219
10
25
1.714
1.389
10
28
1.714
1.324
10
25
1.714
1.238
10
25
0.322
0.349
0.261
0.325
0.219
0.274
0.330
0.341
0.226
0.329
0.218
0.240
0.373
0.306
0.181
0.372
0.162
0.205
0.386
0.292
0.170
0.386
0.149
0.190
0.406
0.287
0.151
0.407
0.141
0.170
0.419
0.261
0.139
0.419
0.136
0.158
0.439
0.261
0.118
0.441
0.095
0.139
0.444
0.256
0.117
0.447
0.092
0.132
0.453
0.232
0.109
0.455
0.090
0.123
0.462
0.256
0.101
0.466
0.089
0.112
0.468
0.232
0.096
0.471
0.088
0.107
0.471
0.229
0.097
0.475
0.088
0.103
Dimension Data
Center Distance
Pinion Diameter
Pressure Angle - Lo
Pressure Angle - Hi
0.974
1.748
20
35
Tooth Load Data
Fx
Driving Side Hi Fy
Fz
Fx
Driving Side Lo
Fy
Fz
0.295
0.384
0.297
0.301
0.223
0.310
31
Assembly and Installation
How to assemble SPIROID® and HELICON® gearing
Following the steps outlined in this guide will allow you to properly assemble your gear sets.
Proper assembly ensures optimal operation of the many features offered by Spiroid and Helicon
gearing. Applications can be designed to minimize the assembly effort. Many details affecting the
mounting of the gear set can be designed and toleranced to allow simple assembly and assure
adequate backlash and running clearances. The basic steps described here will permit maximum
utilization of the simple and positive backlash control features of Spiroid and Helicon gearing. This
procedure suggests the main steps to be followed to set and check the backlash and adjust for
a precise amount of backlash. Both Spiroid and Helicon gearing can be adjusted for backlash by
axial movement of the gear member. Spiroid gearing can be adjusted to a finer degree by axial
movement of the pinion.
Housing Inspection
Proper alignment is critical for maximized gear set performance.
In preparation for assembly of the gear set, the
housing should be inspected. The center distance
or “A” dimension should be established (Figure 1).
This dimension is important and should be within
±. 001 in./in. (For example, a 3.000 inch center
distance would have a tolerance of ±0.003 inch).
The alignment of the bores, which will locate the
pinion and gear, should also be checked. The
shaft angle (usually 90°) should be within ±5’.
Deviation from the nominal shaft angle will cause
a contact pattern shift between the assembled
pinion and gear. Heavy localized contact toward
the inner or outer band of gear teeth is not
desirable.
PINION MOUNTING
DISTANCE
SECTION A-A
AXIAL TRAVEL
OF GEAR
A
TYPICAL SHIM
LOCATION
DECREASE
BACKLASH
“A”
(CENTER
DISTANCE)
A
GEAR
MOUNTING
DISTANCE
SHAFT ANGLE
Pinion Assembly
Proper position of the pinion is important.
Assembly Figure 1
The pinion is normally the first gearing member to be assembled. The nominal pinion mounting
distance should have been determined during the design and detail stage of the project. The
pinion mounting distance is usually the dimension from the centerline of gear to the bearing
shoulder (Figure 1). Both Spiroid and Helicon pinions have threads of constant lead and pressure
angle; and are proportioned to be wider than the band of gear teeth that they mesh with. A Helicon
pinion is insensitive to its axial position, but should be located within ±.030 inches of the nominal
mounting distance. The Spiroid pinion, with the 5° angle, should be located within ±.010 inches of
the nominal mounting distance.
Axial Movement of the pinion must be avoided.
It is important to check the pinion for axial play due to lack of preload in the bearings. Any axial
movement will affect the backlash readings and give erroneous results. Axial movement in the
pinion should be avoided in close backlash applications, as well as high precision, reverse loading,
Tooth
load components
equals lbs./inch-lb. output torque
and
reverse
driving applications.
32
Table 8
XX
Gear Assembly
(Either Spiroid or Helicon)
The gear shaft bearings should be assembled and adjusted for proper fit. Assemble gear into
mesh with pinion; position by spacer or shims to provide correct nominal mounting distance as
specified by ITW Spiroid. Turn pinion by hand until gear rotates thru 360° and check for binding or
tight spots; if this occurs, increase backlash.
Check backlash
Either clamp an indicator directly to the housing or clamp both the housing and indicator to a rigid
plate. The accuracy of the indicator readings will depend on the rigidity of the mounting of the
indicator in relation to the gear. The indicator finger should contact a gear tooth working face such
that its travel is normal to this face. Prevent any axial or rotational movement of the pinion when
checking backlash on the gear.
Not all gear set assemblies lend
tangent to tooth surface
themselves to having the gear teeth
accessible for mounting an indicator
travel of indicator finger
normal to tooth surface
typical of Figure 2. In such cases, it may
line of travel of finger
will automatically be
be necessary to improvise an alternate
tangent to a circle
approximately equal to
surface for checking backlash. (See
the center distance
Figure 3) The output shaft or equivalent
driven member can be utilized directly or
as a mounting for a lever arm. Whatever
is used must be rigidly mounted so the
surface being checked indicates actual
gear movement. The surface being
checked with the indicator must be
normal to the arc of rotation. (See Figure
Assembly Figure 2
2) The indicator need not be located
exactly at a radius equivalent to the gear
set center distance. Checking backlash
at a larger or smaller radius must be adjusted linearly to the equivalent backlash at the radius of the
center distance. (For example, if a 3.000 inch center distance gear set has .001 inch backlash, this would
be equivalent to .0005 inch backlash if measured at a
1.500 inch radius or .002 inch backlash if measured at a
6.000 inch radius.)
OUTPUT SHAFT
EQUIV. “A”
(C.D.)
DIAL INDICATOR
IMPROVED
CLAMP
GEAR
“A” (C.D.)
PINION
SECURE PINION
SHAFT
In some cases, a reliable backlash check cannot be
made on the output or driven side of the gear. As an
alternate, backlash checks might have to be made by
checking the rotational lash of the pinion. The Spiroid
Engineering Department would have to determine the
equivalent circular movement of the pinion that would
be equivalent to some increment of backlash. If the
pinion is going to be used to determine the backlash, the
gear must be secured so a true backlash reading can be
established. After securing the gear, place a clamp on
the pinion.
Assembly Figure 3
33
Backlash Chart
Spiroid and Helicon gearing can be used in zero backlash applications. However, the desire and
need for zero backlash must be communicated early in the design process as many factors must be
considered for a successful design.
The following chart illustrates the backlash capabilities of Spiroid and Helicon gearing relative to
the manufacturing processes that are used to produce them. As you can see, ITW Heartland’s
standard manufacturing methods will yield a backlash between 20.63 and 45.84 ArcMinutes. With
enhanced manufacturing processes, near-zero backlash is achievable depending on the gear
radius, tolerances, and thread grinding and lapping procedures that are used. It is important to
note, however, that these processes will also add cost to a given project.
ArcMinutes Per Gear Radius
Radians (in.)
.0100
0.7500
0.9375
1.1250
1.5000
1.8750
2.2500
2.6250
3.0000
45.84
36.67
30.56
22.92
18.33
15.28
13.10
11.46
.0090
41.25
33.00
27.50
20.63
16.50
13.75
11.79
10.31
.0080
36.67
29.34
24.45
18.33
14.67
12.22
10.48
09.17
.0070
32.09
25.67
21.39
16.04
12.83
10.70
09.17
08.02
.0060
27.50
22.00
18.33
13.75
11.00
09.17
07.86
06.88
.0050
22.92
18.33
15.28
11.46
09.17
07.64
06.55
05.73
.0040
18.33
14.67
12.22
09.17
07.33
06.11
05.24
04.58
.0030
13.75
11.00
09.17
06.88
05.50
04.58
03.93
03.44
.0020
09.17
07.33
06.11
04.58
03.67
03.06
02.62
02.29
.0010
04.58
03.67
03.06
02.29
01.83
01.53
01.31
01.15
.0009
04.13
03.30
02.75
02.06
01.65
01.38
01.18
01.03
.0008
03.67
02.93
02.44
01.83
01.47
01.22
01.05
00.92
.0007
03.21
02.57
02.14
01.60
01.28
01.07
00.92
00.80
.0006
02.75
02.20
01.83
01.38
01.10
00.92
00.79
00.69
.0005
02.29
01.83
01.53
01.15
00.92
00.76
00.65
00.57
ArcMin
34
19.1+
Block tolerances, standard thread
9.1 to 19
Good tolerances, finish ground thread, standard process controls
4.1 to 9
Above + light lapping, non-matched
0 to 4
Above + restrictive tolerances, heavier lapping, matched sets
APPLICATION DATA SHEET
Contact Information
Contact
Title
Company
Address
E-mail
City
State
General Information
TIMING
Date Initiated
Zip Code
Phone
Desired
Quote Date
APPLICATION STAGE
Prototype
Desired Design
Confirmation Date
1st Article
Production
Other
APPLICATION MARKET - check all that apply
Commercial
Military
Aerospace / Aviation
APPLICATION PROJECTIONS
Input Parameters
Power Source AC
Robotics
Annual Usage
DC
Other
Medical
Target price
Servo
Quote Quantities
Other
Pinion Speed (RPM)
Dynamic Motor Torque (in. lbs)
Max
Max Motor Stall Torque (in. lbs)
Normal
Max
Normal
Output Parameters
Sustained Torque (in. lbs)
Max
Max Stall Torque (in. lbs)
Normal
Output Load Classification
Max
Shock
Normal
Gradually Applied
Life Cycle / Environmental
Design Life
Hours
Constant
Cyclic
Intermittent
Duty Cycle
Definition
Cycles
(Frequency of Starts & Stops Duration of Operation Etc.)
Duration of Service
Rotation
.5 hrs / day
Single Direction
2 hrs / day
Bi-directional
10 hrs / day
24 hrs / day
Ambient Temperature (
°F to
Other
°F)
Special Requirements
Material
Ratio
Backdrive Preference
Self Locking
Backdriveable
to 1”
Exact
Approximate
Desired Backlash
Stick-Slip
Does Not Matter
Degrees
ArcMinutes
Desired Space Claim
ArcSeconds
Radians
In.
Mm.
Notes
Please attach relevant sketch, prints, or model of the concept under consideration.
www.ITWHeartland.com • 1601 36th Avenue • Alexandria, MN 56308 • Toll: 800-253-7940
35
Other ITW Heartland Products and Services
Strategic Assembly Solutions – Experts in Automation, Innovation, and Motion Control
The Strategic Assembly Solutions team provides a variety of manufacturing services that range
from building custom automated industrial machines to sub-assemblies for other manufacturing
companies.
To deliver the world-class service and support that has come to be expected of this team, Strategic
Assembly Solutions offers extensive product and process testing, as well as 24/7 spare parts
service to cover global locations.
Strategic Assembly Solutions serves many industries with an array of automated equipment and
assembly capabilities including mechanical assembly, electrical controls, robotics, pneumatics and
hydraulics and material handling.
www.ITWHeartland.com/StrategicAssembly
Manufactured Products – Custom Precision Machining
With a focus on close-tolerance, complex, value added machined components, Manufactured
Products offers a single-source machining capability for manufacturing companies across the globe.
It also utilizes robust engineering resources and a strong investment in employees, machines, and
processes to ensure that each customer gets good parts, on-time, headache-free.
In particular, over the years Manufactured Products has developed a distinct expertise in complex,
value-add Horizontal CNC machining for companies operating in a variety of markets. Its ability
to remove more metal with less operations and part handling has won Manufactured Products the
decades-long loyalty of more than a handful of successful customers.
www.ITWHeartland.com/ManufacturedProducts
36
Table 8
XX
ITW Gear Machines – Your Experts in Automated Gear Inspection and Burnishing
Designed to maximize accuracy, increase uptime, and maximize productivity, ITW Heartland’s
patented gear systems are the easiest to use and most reliable gear inspection machines in the
industry.
With two gear equipment patents, ITW Gear Machines’ high speed, automatic gear burnishing
and inspection processes offer fast and easy changeover. In addition, it employs proprietary,
easy-to-use gear inspection software to facilitate its gear measurement, data acquisition, SPC,
count summaries, auto calibration, and error compensation processes.
www.ITWHeartland.com/GearMachines
Contact us today for your manufacturing needs
37

the application guide now.

Transcription

Similar documents

Teknik Veri