STANDARD ROLLER CHAIN SPROCKET DIAMETERS
5/8 INCH PITCH - NO. 50
.400 INCH DIAMETER ROLLER
No.
Teeth		 Outside
Diameter		 Pitch
Diameter		 Caliper
Diameter
8 1.884 1.633 1.233
9 2.093 1.828 1.400
10 2.299 2.023 1.623
11 2.504 2.219 1.796
12 2.708 2.415 2.015
13 2.911 2.612 2.193
14 3.113 2.809 2.409
15 3.315 3.006 2.590
16 3.517 3.204 2.804
17 3.718 3.401 2.987
18 3.919 3.599 3.159
19 4.121 3.798 3.384
20 4.321 3.995 3.595
21 4.522 4.194 3.782
22 4.722 4.392 3.992
23 4.923 4.590 4.179
24 5.123 4.788 4.388
25 5.323 4.987 4.577
26 5.523 5.185 4.785
27 5.723 5.384 4.975
28 5.922 5.582 5.182
29 6.122 5.781 5.371
30 6.321 5.979 5.579
31 6.521 6.178 5.770
32 6.721 6.376 5.976
33 6.921 6.575 6.168
34 7.120 6.774 6.374
35 7.319 6.973 6.565
36 7.519 7.171 6.771
37 7.718 7.370 6.963
38 7.918 7.569 7.169
39 8.117 7.768 7.361
40 8.316 7.966 7.566
41 8.516 8.165 7.759
42 8.715 8.364 7.964
43 8.914 8.563 8.157
44 9.114 8.761 8.361
45 9.313 8.960 8.554
46 9.512 9.159 8.759
47 9.711 9.358 8.952
48 9.911 9.556 9.156
49 10.110 9.755 9.350
50 10.309 9.954 9.554
51 10.508 10.153 9.748
52 10.708 10.351 9.951
53 10.907 10.550 10.146
54 11.106 10.749 10.349
55 11.305 10.948 10.543
56 11.504 11.147 10.747
57 11.703 11.346 10.941
58 11.903 11.544 11.144
59 12.102 11.743 11.339
60 12.301 11.942 11.542
61 12.500 12.141 11.737
62 12.699 12.340 11.940
63 12.898 12.539 12.135
64 13.098 12.738 12.338
65 13.296 12.936 12.533
66 13.496 13.135 12.735
67 13.694 13.334 12.930
68 13.894 13.533 13.133
69 14.093 13.732 13.328
70 14.292 13.931 13.531
71 14.491 14.129 13.726
72 14.690 14.329 13.929
73 14.889 14.528 14.124
74 15.088 14.726 14.326
75 15.287 14.925 14.522
76 15.486 15.124 14.724
77 15.685 15.323 14.920
78 15.884 15.522 15.122
79 16.083 15.721 15.318
80 16.283 15.919 15.519
81 16.481 16.119 15.715
82 16.681 16.318 15.918
83 16.879 16.516 16.113
84 17.079 16.715 16.315
85 17.278 16.914 16.511
86 17.476 17.113 16.713
87 17.676 17.312 16.909
88 17.874 17.511 17.111
89 18.074 17.709 17.307
90 18.273 17.909 17.509
91 18.472 18.108 17.705
92 18.671 18.306 17.906
93 18.870 18.505 18.103
94 19.069 18.704 18.304
95 19.268 18.903 18.501
96 19.467 19.102 18.702
97 19.666 19.301 18.898
98 19.865 19.500 19.100
99 20.064 19.699 19.296
100 20.263 19.898 19.498
101 20.462 20.096 19.694
102 20.661 20.296 19.896
103 20.860 20.494 20.092
104 21.059 20.693 20.293
105 21.258 20.893 20.490
106 21.457 21.091 20.691
107 21.656 21.290 20.888
108 21.855 21.489 21.089
109 22.054 21.688 21.286
110 22.253 21.887 21.487
111 22.452 22.086 21.684
112 22.651 22.284 21.884
113 22.850 22.484 22.081
114 23.049 22.683 22.283
115 23.248 22.881 22.479
116 23.447 23.080 22.680
117 23.646 23.279 22.827
118 23.845 23.478 23.078
119 24.004 23.677 23.275
120 24.243 23.876 23.476
121 24.442 24.075 23.673
122 24.641 24.274 23.874
123 24.840 24.473 24.071
124 25.039 24.672 24.272
125 25.238 24.871 24.469

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