THESE CHARTS ARE PROVIDED AS A REFERENCE ONLY AND DO NOT REFLECT SPROCKETS IN STOCK

STANDARD ROLLER CHAIN SPROCKET DIAMETERS
1/2 - INCH PITCH - NO. 40
.312 INCH DIAMETER ROLLER

No.
Teeth
Outside
Diameter
Pitch
Diameter
Caliper
Diameter
6 1.166 1.000 0.688
7 1.338 1.152 0.812
8 1.507 1.307 0.995
9 1.674 1.462 1.127
10 1.839 1.618 1.305
11 2.003 1.775 1.444
12 2.166 1.932 1.614
13 2.328 2.089 1.761
14 2.490 2.247 1.934
15 2.652 2.405 2.079
16 2.814 2.563 2.250
17 2.974 2.721 2.397
18 3.136 2.879 2.567
19 3.292 3.038 2.715
20 3.457 3.196 2.883
21 3.618 3.355 3.033
22 3.778 3.513 3.201
23 3.938 3.672 3.351
24 4.098 3.831 3.518
25 4.258 3.989 3.669
26 4.418 4.148 3.835
27 4.578 4.307 3.987
28 4.738 4.465 4.153
29 4.898 4.625 4.305
30 5.057 4.783 4.471
31 5.217 4.942 4.623
32 5.376 5.101 4.788
33 5.536 5.260 4.941
34 5.696 5.419 5.107
35 5.856 5.578 5.260
36 6.015 5.737 5.425
37 6.174 5.896 5.578
38 6.334 6.055 5.742
39 6.494 6.214 5.896
40 6.653 6.373 6.061
41 6.812 6.532 6.214
42 6.972 6.691 6.379
43 7.132 6.850 6.532
44 7.291 7.009 6.696
45 7.450 7.168 6.851
46 7.609 7.327 7.014
47 7.769 7.486 7.169
48 7.928 7.645 7.332
49 8.088 7.804 7.487
50 8.248 7.963 7.650
51 8.406 8.122 7.805
52 8.566 8.281 7.968
53 8.725 8.440 8.124
54 8.884 8.599 8.286
55 9.044 8.758 8.442
56 9.204 8.917 8.605
57 9.362 9.077 8.760
58 9.522 9.235 8.924
59 9.628 9.395 9.078
60 9.840 9.554 9.241
61 10.000 9.713 9.397
62 10.159 9.872 9.559
63 10.319 10.031 9.715
64 10.478 10.190 9.872
65 10.673 10.349 10.033
66 10.796 10.508 10.195
67 10.955 10.667 10.352
68 11.115 10.826 10.514
69 11.274 10.985 10.670
70 11.433 11.145 10.832
71 11.592 11.304 10.988
72 11.752 11.463 11.151
73 11.911 11.622 11.306
74 12.070 11.781 11.468
75 12.229 11.940 11.625
76 12.389 12.099 11.786
77 12.548 12.258 11.943
78 12.707 12.417 12.105
79 12.866 12.576 12.261
80 13.026 12.736 12.423
81 13.185 12.895 12.580
82 13.344 13.054 12.742
83 13.503 13.213 12.898
84 13.663 13.372 13.059
85 13.822 13.531 13.216
86 13.981 13.690 13.373
87 14.140 13.849 13.534
88 14.299 14.009 13.696
89 14.459 14.168 13.853
90 14.618 14.327 14.014
91 14.777 14.486 14.171
92 14.936 14.645 14.332
93 15.096 14.804 14.489
94 15.255 14.963 14.651
95 15.414 15.122 14.808
96 15.573 15.282 14.969
97 15.732 15.441 15.126
98 15.892 15.600 15.287
99 16.051 15.759 15.445
100 16.210 15.918 15.605
101 16.369 16.077 15.763
102 16.528 16.236 15.924
103 16.688 16.395 16.081
104 16.847 16.555 16.242
105 17.006 16.714 16.399
106 17.165 16.873 16.561
107 17.324 17.032 16.717
108 17.484 17.191 16.878
109 17.643 17.351 17.036
110 17.802 17.509 17.197
111 17.962 17.668 17.304
112 18.121 17.827 17.515
113 18.280 17.987 17.672
114 18.439 18.146 17.834
115 18.598 18.305 17.991
116 18.757 18.464 18.151
117 18.916 18.623 18.309
118 19.076 18.782 18.470
119 19.235 18.941 18.627
120 19.394 19.101 18.788
121 19.553 19.260 18.946
122 19.712 19.419 19.106
123 19.872 19.578 19.264
124 20.031 19.737 19.425
125 20.190 19.896 19.582

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