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Roller Chain Sprocket Diameters

ANSI Roller Chain Sprocket Diameter Chart
Tooth Count
-
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
#25 Sprocket
(1/4" Pitch)
0.837"
0.92"
1.002"
1.083"
1.164"
1.245"
1.326"
1.407"
1.487"
1.568"
1.648"
1.729"
1.809"
1.889"
1.969"
2.049"
2.129"
2.209"
2.289"
2.369"
2.449"
2.529"
2.609"
2.688"
2.768"
2.848"
2.928"
3.008"
3.087"
3.167"
3.247"
3.327"
3.406"
3.486"
3.566"
3.646"
3.725"
3.805"
3.885"
3.964"
4.044"
4.124"
4.203"
4.283"
4.363"
4.442"
4.522"
4.602"
4.681"
4.761"
4.841"
4.92"
5"
5.08"
5.159"
5.239"
5.319"
5.398"
5.478"
5.558"
5.637"
5.717"
5.796"
5.876"
5.956"
6.035"
6.115"
6.195"
6.274"
6.354"
6.433"
6.513"
6.593"
6.672"
6.752"
6.832"
6.911"
6.991"
7.07"
7.15"
7.23"
7.309"
7.389"
7.468"
7.548"
7.628"
7.707"
7.787"
7.866"
7.946"
8.026"
8.105"
8.185"
8.264"
8.344"
8.424"
8.503"
8.583"
8.662"
8.742"
8.822"
8.901"
8.981"
9.06"
#35 Sprocket
(3/8" Pitch)
1.256"
1.379"
1.502"
1.625"
1.746"
1.868"
1.989"
2.11"
2.231"
2.352"
2.472"
2.593"
2.713"
2.833"
2.954"
3.074"
3.194"
3.314"
3.434"
3.553"
3.673"
3.793"
3.913"
4.032"
4.152"
4.272"
4.392"
4.511"
4.631"
4.751"
4.87"
4.99"
5.109"
5.229"
5.349"
5.468"
5.588"
5.707"
5.827"
5.946"
6.066"
6.186"
6.305"
6.425"
6.544"
6.663"
6.783"
6.903"
7.022"
7.142"
7.261"
7.38"
7.5"
7.619"
7.739"
7.859"
7.978"
8.097"
8.217"
8.336"
8.456"
8.575"
8.694"
8.814"
8.933"
9.053"
9.172"
9.292"
9.411"
9.531"
9.65"
9.77"
9.889"
10.008"
10.128"
10.247"
10.367"
10.486"
10.605"
10.725"
10.844"
10.964"
11.083"
11.202"
11.322"
11.441"
11.561"
11.68"
11.799"
11.919"
12.038"
12.158"
12.277"
12.396"
12.516"
12.635"
12.755"
12.874"
12.993"
13.113"
13.232"
13.352"
13.471"
13.59"
#40 Sprocket
(1/2" Pitch)
1.674"
1.839"
2.003"
2.166"
2.329"
2.491"
2.652"
2.814"
2.975"
3.136"
3.297"
3.457"
3.618"
3.778"
3.938"
4.098"
4.258"
4.418"
4.578"
4.738"
4.898"
5.057"
5.217"
5.377"
5.537"
5.696"
5.856"
6.015"
6.175"
6.334"
6.494"
6.653"
6.813"
6.972"
7.132"
7.291"
7.451"
7.61"
7.769"
7.929"
8.088"
8.248"
8.407"
8.566"
8.726"
8.885"
9.044"
9.204"
9.363"
9.522"
9.682"
9.841"
10"
10.159"
10.319"
10.478"
10.637"
10.797"
10.956"
11.115"
11.274"
11.434"
11.593"
11.752"
11.911"
12.071"
12.23"
12.389"
12.548"
12.708"
12.867"
13.026"
13.185"
13.345"
13.504"
13.663"
13.822"
13.981"
14.141"
14.3"
14.459"
14.618"
14.778"
14.937"
15.096"
15.255"
15.414"
15.574"
15.733"
15.892"
16.051"
16.211"
16.37"
16.529"
16.688"
16.847"
17.007"
17.166"
17.325"
17.484"
17.643"
17.803"
17.962"
18.121"
#50 Sprocket
(5/8" Pitch)
2.093"
2.299"
2.504"
2.708"
2.911"
3.113"
3.315"
3.517"
3.718"
3.919"
4.121"
4.321"
4.522"
4.722"
4.923"
5.123"
5.323"
5.523"
5.723"
5.922"
6.122"
6.321"
6.521"
6.721"
6.921"
7.119"
7.319"
7.519"
7.718"
7.918"
8.117"
8.316"
8.516"
8.715"
8.914"
9.114"
9.313"
9.512"
9.711"
9.911"
10.11"
10.309"
10.508"
10.708"
10.907"
11.106"
11.305"
11.504"
11.703"
11.903"
12.102"
12.301"
12.5"
12.699"
12.898"
13.098"
13.296"
13.496"
13.694"
13.894"
14.093"
14.292"
14.491"
14.69"
14.889"
15.088"
15.287"
15.486"
15.685"
15.884"
16.083"
16.283"
16.481"
16.681"
16.879"
17.079"
17.278"
17.476"
17.676"
17.874"
18.074"
18.273"
18.472"
18.671"
18.87"
19.069"
19.268"
19.467"
19.666"
19.865"
20.064"
20.263"
20.462"
20.661"
20.86"
21.059"
21.258"
21.457"
21.656"
21.855"
22.054"
22.253"
22.452"
22.651"
#60 Sprocket
(3/4" Pitch)
2.511"
2.759"
3.005"
3.249"
3.493"
3.736"
3.978"
4.22"
4.462"
4.703"
4.945"
5.186"
5.426"
5.666"
5.907"
6.147"
6.387"
6.627"
6.867"
7.106"
7.346"
7.586"
7.826"
8.065"
8.305"
8.543"
8.783"
9.023"
9.262"
9.501"
9.74"
9.98"
10.219"
10.458"
10.697"
10.937"
11.176"
11.414"
11.654"
11.893"
12.132"
12.371"
12.61"
12.849"
13.088"
13.327"
13.566"
13.805"
14.044"
14.283"
14.522"
14.761"
15"
15.239"
15.478"
15.717"
15.956"
16.195"
16.433"
16.673"
16.911"
17.15"
17.389"
17.628"
17.867"
18.106"
18.344"
18.584"
18.822"
19.061"
19.3"
19.539"
19.778"
20.017"
20.255"
20.495"
20.733"
20.972"
21.211"
21.449"
21.689"
21.927"
22.166"
22.405"
22.644"
22.883"
23.121"
23.36"
23.599"
23.838"
24.077"
24.316"
24.554"
24.793"
25.032"
25.271"
25.51"
25.748"
25.987"
26.226"
26.465"
26.704"
26.942"
27.181"
#80 Sprocket
(1" Pitch)
3.348"
3.678"
4.006"
4.332"
4.657"
4.981"
5.304"
5.627"
5.949"
6.271"
6.593"
6.914"
7.235"
7.555"
7.876"
8.196"
8.516"
8.836"
9.156"
9.475"
9.795"
10.114"
10.434"
10.753"
11.073"
11.391"
11.711"
12.03"
12.349"
12.668"
12.987"
13.306"
13.625"
13.944"
14.263"
14.582"
14.901"
15.219"
15.538"
15.857"
16.176"
16.495"
16.813"
17.132"
17.451"
17.769"
18.088"
18.407"
18.725"
19.044"
19.363"
19.681"
20"
20.318"
20.637"
20.956"
21.274"
21.593"
21.911"
22.23"
22.548"
22.867"
23.185"
23.504"
23.822"
24.141"
24.459"
24.778"
25.096"
25.415"
25.733"
26.052"
26.37"
26.689"
27.007"
27.326"
27.644"
27.962"
28.281"
28.599"
28.918"
29.236"
29.555"
29.873"
30.192"
30.51"
30.828"
31.147"
31.465"
31.784"
32.102"
32.421"
32.739"
33.057"
33.376"
33.694"
34.013"
34.331"
34.649"
34.968"
35.286"
35.605"
35.923"
36.241"
#100 Sprocket
(1-1/4" Pitch)
4.185"
4.598"
5.008"
5.415"
5.821"
6.226"
6.63"
7.034"
7.436"
7.839"
8.241"
8.643"
9.044"
9.444"
9.845"
10.245"
10.645"
11.045"
11.445"
11.844"
12.244"
12.643"
13.043"
13.441"
13.841"
14.239"
14.639"
15.038"
15.436"
15.835"
16.234"
16.633"
17.031"
17.43"
17.829"
18.228"
18.626"
19.024"
19.423"
19.821"
20.22"
20.619"
21.016"
21.415"
21.814"
22.211"
22.61"
23.009"
23.406"
23.805"
24.204"
24.601"
25"
25.398"
25.796"
26.195"
26.593"
26.991"
27.389"
27.788"
28.185"
28.584"
28.981"
29.38"
29.778"
30.176"
30.574"
30.973"
31.37"
31.769"
32.166"
32.565"
32.963"
33.361"
33.759"
34.158"
34.555"
34.953"
35.351"
35.749"
36.148"
36.545"
36.944"
37.341"
37.74"
38.138"
38.535"
38.934"
39.331"
39.73"
40.128"
40.526"
40.924"
41.321"
41.72"
42.118"
42.516"
42.914"
43.311"
43.71"
44.108"
44.506"
44.904"
45.301"