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Gear Pitch Conversions

[Design Resources] [Gear Application]

Diametric, module and circular pitches Conversion.

Diametral Pitch Circular
Pitch in Inches		 Circular Pitch
in Millimeters		 Module In
Millimeters
20
24
25.3995
31.4159
31.7653
32
36.2857
42.3333
48
50.8348
63.5950
64
72
80
84.6198
96
101.6697
120
127.1899
200		 .1571
.1309
.1237
.100
.0989
.0982
.0856
.0742
.0654
.0618
.0494
.0491
.0436
.0393
.0371
.0327
.0309
.0262
.0247
.0157		 3.990
3.325
3.142
2.540
2.513
2.494
2.199
1.885
1.661
1.571
1.256
1.247
1.107
.998
.943
.831
.785
.665
.628
.399		 1.2700
1.0583
1.0
.8085
.8
.7938
.7
.6
.5288
.5
.4
.3969
.3524
.3177
.3
.2645
.25
.2116
.2
.127

 Spur Gear Conversion

Standard
Stock
Pitches		 Addendum Dedendum Whole
Depth		 Circular
Pitch
20
24
1/10
32
48
64
72
80
96
120
200		 .0500
.0417
.0318
.0313
.0208
.0156
.0139
.0125
.0104
.0083
.0050		 .0579
.0520
.0402
.0395
.0270
.0208
.0187
.0170
.0145
.0120
.0080		 .1079
.0937
.0720
.0708
.0478
.0364
.0326
.0295
.0249
.0203
.0130		 .1571
.1309
.1000
.0982
.0654
.0491
.0436
.0393
.0327
.0262
.0157

 

 

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