Omni Gear and Machine Corporation - 90 Bissel Street - Joliet, Illinois 60432

 

 Point Width
Charts

MODULE CONVERSION CHART
Roller Chain Sprocket
Chain
No.		 Circular
Pitch		 Roller
Diameter

American Standard
0.060
0.090
0.130
0.134
(spec.)
(spec.)
25
(spec.)		 .1227
.1475
1/4
1/4
35
40
41
(spec.)		 3/8
1/2
1/2
1/2		 0.200
0.313
0.306
0.322
50
(spec.)
60
80		 5/8
5/8
3/4
1		 0.400
0.313
0.469
0.625
(spec.)
100
120
140		 1
1-1/4
1-1/2
1-3/4		 0.56253
0.750
0.875
1.000
160
180
200
240		 2
2-1/4
2-1/2
3		 1.125
1.406
1.563
1.875
(spec.)
(spec.)		 6 mm
8 mm		 4 mm
5 mm
British Standard B. S. 228: 1962
36
42
51
61		 3/8
1/2
5/8
3/4		 0.2500
0.355
0.400
0.475
Module Diametral Pitch Circular Pitch Whole Depth
2.157/DP 2.25/DP 2.20/DP
+ .002
0.20
0.30
0.35
0.40		 127.0000
84.6667
72.5714
63.5000		 0.0247
0.0371
0.0433
0.0495		 0.0170
0.0255
0.0297
0.0340		 0.0177
0.0266
0.0310
0.0354		 0.0193
0.0280
0.0323
0.0367
0.45
0.50
0.60
0.70		 56.4444
50.8000
42.3333
36.2857		 0.0557
0.0618
0.0742
0.0866		 0.0382
0.0425
0.0510
0.0594		 0.0399
0.0443
0.0531
0.0620		 0.0410
0.0453
0.0539
0.0626
0.75
0.80
0.90
1		 33.8667
31.7500
28.2222
25.4000		 0.0928
0.0989
0.1113
0.1237		 0.0637
0.0679
0.0764
0.0849		 0.0664
0.0709
0.0797
0.0886		 0.0670
0.0713
0.0800
0.0886
1.25
1.50
1.75
2		 20.3200
16.9333
14.5143
12.7000		 0.1546
0.1855
0.2164
0.2474		 0.1062
0.1274
0.1486
0.1698		 0.1107
0.1329
0.1550
0.1772		  
 
 
 
2.25
2.50
2.75
3		 11.2889
10.1600
9.2364
8.4667		 0.2783
0.3092
0.3404
0.3711		 0.1911
0.2123
0.2335
0.2548		 0.1993
0.2215
0.2436
0.2657		  
 
 
 
3.25
3.50
3.75
4		 7.8153
7.2571
6.7733
6.3500		 0.4020
0.4329
0.4638
0.4947		 0.2760
0.2972
0.3185
0.3397		 0.2879
0.3100
0.3322
0.3543		  
 
 
 
4.25
4.50
4.75
5		 5.9765
5.6444
5.3474
5.0800		 0.5257
0.5566
0.5875
0.6184		 0.3609
0.3821
0.4034
0.4246		 0.3765
0.3986
0.4208
0.4429		  
 
 
 
5.25
5.50
5.75
6		 4.8381
4.6182
4.4174
4.2333		 0.6493
0.8030
0.7112
0.7421		 0.4458
0.4671
0.4883
0.5095		 0.4651
0.4872
0.5094
0.5315		  
 
 
 
6.5
7
7.50
8		 3.0977
3.6286
3.3867
3.1750		 0.8048
0.8658
0.9276
0.9895		 0.5520
0.5944
0.6369
0.6794		 0.5758
0.6201
0.6644
0.7087		  
 
 
 
9
10
11
12		 2.8222
2.5400
2.3090
2.1167		 1.1132
1.2368
1.2606
1.4842		 0.7643
0.8492
0.9342
1.0191		 0.7972
0.8858
0.9744
1.0630		  
 
 
 
14
15
16
18		 1.8143
1.6933
1.5875
1.4111		 1.7316
1.8553
1.9790
2.2263		 1.1890
1.2738
1.3588
1.5286		 1.2401
1.3287
1.4173
1.5945		  
 
 
 
20
22
24
25		 1.2700
1.1545
1.0583
1.0160		 2.4737
2.7211
2.9684
3.0921		 1.6984
1.8683
2.0381
2.1230		 1.7717
1.9488
2.1260
2.2146