Tables / ANSI 40

Sprocket chart 1/2" x 5/16" — ANSI 40 (08A)

Chain American ANSI B29.1 · pitch 0.500" (12.70 mm) · roller Ø 0.312" · inner width 0.309" · simplex tooth width 0.287". Dimensions in inches. Tap a row to open it in the calculator (duplex, triplex, mm, material).

N	PD	OD	BD	CD	Max hub
8	1.307	1.507	0.995	0.995	0.683
9	1.462	1.674	1.150	1.128	0.850
10	1.618	1.839	1.306	1.306	1.015
11	1.775	2.003	1.463	1.445	1.179
12	1.932	2.166	1.620	1.620	1.342
13	2.089	2.329	1.777	1.762	1.504
14	2.247	2.491	1.935	1.935	1.667
15	2.405	2.652	2.093	2.080	1.828
16	2.563	2.814	2.251	2.251	1.990
17	2.721	2.975	2.409	2.398	2.151
18	2.879	3.136	2.568	2.568	2.312
19	3.038	3.296	2.726	2.716	2.472
20	3.196	3.457	2.884	2.884	2.633
21	3.355	3.617	3.043	3.034	2.793
22	3.513	3.778	3.202	3.202	2.953
23	3.672	3.938	3.360	3.352	3.114
24	3.831	4.098	3.519	3.519	3.274
25	3.989	4.258	3.678	3.670	3.434
26	4.148	4.418	3.836	3.836	3.594
27	4.307	4.578	3.995	3.988	3.754
28	4.466	4.738	4.154	4.154	3.913
29	4.625	4.897	4.313	4.306	4.073
30	4.783	5.057	4.472	4.472	4.233
31	4.942	5.217	4.630	4.624	4.393
32	5.101	5.377	4.789	4.789	4.552
33	5.260	5.536	4.948	4.942	4.712
34	5.419	5.696	5.107	5.107	4.872
35	5.578	5.855	5.266	5.260	5.031
36	5.737	6.015	5.425	5.425	5.191
37	5.896	6.175	5.584	5.579	5.350
38	6.055	6.334	5.743	5.743	5.510
39	6.214	6.494	5.902	5.897	5.669
40	6.373	6.653	6.061	6.061	5.829
41	6.532	6.813	6.220	6.215	5.988
42	6.691	6.972	6.379	6.379	6.148
43	6.850	7.131	6.538	6.533	6.307
44	7.009	7.291	6.697	6.697	6.467
45	7.168	7.450	6.856	6.852	6.626
46	7.327	7.610	7.015	7.015	6.786
47	7.486	7.769	7.174	7.170	6.945
48	7.645	7.929	7.333	7.333	7.104
49	7.804	8.088	7.492	7.488	7.264
50	7.963	8.247	7.651	7.651	7.423
51	8.122	8.407	7.810	7.806	7.583
52	8.281	8.566	7.969	7.969	7.742
53	8.440	8.725	8.128	8.125	7.901
54	8.599	8.885	8.287	8.287	8.061
55	8.758	9.044	8.446	8.443	8.220
56	8.917	9.203	8.606	8.606	8.379
57	9.076	9.363	8.765	8.761	8.539
58	9.236	9.522	8.924	8.924	8.698
59	9.395	9.681	9.083	9.079	8.857
60	9.554	9.841	9.242	9.242	9.016
61	9.713	10.000	9.401	9.398	9.176
62	9.872	10.159	9.560	9.560	9.335
63	10.031	10.318	9.719	9.716	9.494
64	10.190	10.478	9.878	9.878	9.654
65	10.349	10.637	10.037	10.034	9.813
66	10.508	10.796	10.196	10.196	9.972
67	10.667	10.956	10.355	10.353	10.131
68	10.826	11.115	10.515	10.515	10.291
69	10.985	11.274	10.674	10.671	10.450
70	11.145	11.433	10.833	10.833	10.609
71	11.304	11.593	10.992	10.989	10.768
72	11.463	11.752	11.151	11.151	10.928
73	11.622	11.911	11.310	11.307	11.087
74	11.781	12.070	11.469	11.469	11.246
75	11.940	12.230	11.628	11.626	11.406
76	12.099	12.389	11.787	11.787	11.565
77	12.258	12.548	11.947	11.944	11.724
78	12.417	12.707	12.106	12.106	11.883
79	12.577	12.867	12.265	12.262	12.042
80	12.736	13.026	12.424	12.424	12.202
81	12.895	13.185	12.583	12.581	12.361
82	13.054	13.344	12.742	12.742	12.520
83	13.213	13.504	12.901	12.899	12.679
84	13.372	13.663	13.060	13.060	12.839
85	13.531	13.822	13.219	13.217	12.998
86	13.690	13.981	13.379	13.379	13.157
87	13.849	14.140	13.538	13.535	13.316
88	14.009	14.300	13.697	13.697	13.476
89	14.168	14.459	13.856	13.854	13.635
90	14.327	14.618	14.015	14.015	13.794
91	14.486	14.777	14.174	14.172	13.953
92	14.645	14.937	14.333	14.333	14.112
93	14.804	15.096	14.492	14.490	14.272
94	14.963	15.255	14.652	14.652	14.431
95	15.122	15.414	14.811	14.809	14.590
96	15.282	15.573	14.970	14.970	14.749
97	15.441	15.733	15.129	15.127	14.909
98	15.600	15.892	15.288	15.288	15.068
99	15.759	16.051	15.447	15.445	15.227
100	15.918	16.210	15.606	15.606	15.386
101	16.077	16.369	15.765	15.763	15.545
102	16.236	16.529	15.925	15.925	15.705
103	16.396	16.688	16.084	16.082	15.864
104	16.555	16.847	16.243	16.243	16.023
105	16.714	17.006	16.402	16.400	16.182
106	16.873	17.165	16.561	16.561	16.341
107	17.032	17.325	16.720	16.718	16.501
108	17.191	17.484	16.879	16.879	16.660
109	17.350	17.643	17.038	17.037	16.819
110	17.509	17.802	17.198	17.198	16.978
111	17.669	17.961	17.357	17.355	17.137
112	17.828	18.121	17.516	17.516	17.297
113	17.987	18.280	17.675	17.673	17.456
114	18.146	18.439	17.834	17.834	17.615
115	18.305	18.598	17.993	17.992	17.774
116	18.464	18.757	18.152	18.152	17.933
117	18.623	18.917	18.312	18.310	18.093
118	18.783	19.076	18.471	18.471	18.252
119	18.942	19.235	18.630	18.628	18.411
120	19.101	19.394	18.789	18.789	18.570

PD = p / sin(180°/N) · OD = p·(0.6 + cot(180°/N)) · BD = PD − roller Ø · CD = BD (even N) or PD·cos(90°/N) − roller Ø (odd N).