Tables / ANSI 100

Sprocket chart 1 1/4" x 3/4" — ANSI 100 (20A)

Chain American ANSI B29.1 · pitch 1.250" (31.75 mm) · roller Ø 0.750" · inner width 0.744" · simplex tooth width 0.707". Dimensions in inches. Tap a row to open it in the calculator (duplex, triplex, mm, material).

N	PD	OD	BD	CD	Max hub
8	3.266	3.768	2.516	2.516	1.752
9	3.655	4.184	2.905	2.849	2.169
10	4.045	4.597	3.295	3.295	2.581
11	4.437	5.007	3.687	3.642	2.991
12	4.830	5.415	4.080	4.080	3.399
13	5.223	5.821	4.473	4.435	3.806
14	5.617	6.227	4.867	4.867	4.211
15	6.012	6.631	5.262	5.229	4.615
16	6.407	7.034	5.657	5.657	5.019
17	6.803	7.437	6.053	6.024	5.421
18	7.198	7.839	6.448	6.448	5.823
19	7.594	8.241	6.844	6.818	6.225
20	7.991	8.642	7.241	7.241	6.627
21	8.387	9.043	7.637	7.613	7.028
22	8.783	9.444	8.033	8.033	7.428
23	9.180	9.844	8.430	8.409	7.829
24	9.577	10.245	8.827	8.827	8.229
25	9.973	10.645	9.223	9.204	8.629
26	10.370	11.045	9.620	9.620	9.029
27	10.767	11.444	10.017	9.999	9.429
28	11.164	11.844	10.414	10.414	9.828
29	11.561	12.244	10.811	10.794	10.228
30	11.958	12.643	11.208	11.208	10.627
31	12.356	13.042	11.606	11.590	11.027
32	12.753	13.441	12.003	12.003	11.426
33	13.150	13.841	12.400	12.385	11.825
34	13.547	14.240	12.797	12.797	12.224
35	13.945	14.639	13.195	13.181	12.623
36	14.342	15.038	13.592	13.592	13.022
37	14.740	15.436	13.990	13.976	13.421
38	15.137	15.835	14.387	14.387	13.820
39	15.534	16.234	14.784	14.772	14.218
40	15.932	16.633	15.182	15.182	14.617
41	16.329	17.031	15.579	15.567	15.016
42	16.727	17.430	15.977	15.977	15.414
43	17.124	17.829	16.374	16.363	15.813
44	17.522	18.227	16.772	16.772	16.212
45	17.919	18.626	17.169	17.159	16.610
46	18.317	19.024	17.567	17.567	17.009
47	18.715	19.423	17.965	17.954	17.407
48	19.112	19.821	18.362	18.362	17.806
49	19.510	20.220	18.760	18.750	18.204
50	19.907	20.618	19.157	19.157	18.603
51	20.305	21.017	19.555	19.545	19.001
52	20.703	21.415	19.953	19.953	19.399
53	21.100	21.813	20.350	20.341	19.798
54	21.498	22.212	20.748	20.748	20.196
55	21.896	22.610	21.146	21.137	20.594
56	22.293	23.008	21.543	21.543	20.993
57	22.691	23.407	21.941	21.932	21.391
58	23.089	23.805	22.339	22.339	21.789
59	23.486	24.203	22.736	22.728	22.188
60	23.884	24.601	23.134	23.134	22.586
61	24.282	25.000	23.532	23.524	22.984
62	24.680	25.398	23.930	23.930	23.382
63	25.077	25.796	24.327	24.320	23.780
64	25.475	26.194	24.725	24.725	24.179
65	25.873	26.593	25.123	25.115	24.577
66	26.270	26.991	25.520	25.520	24.975
67	26.668	27.389	25.918	25.911	25.373
68	27.066	27.787	26.316	26.316	25.771
69	27.464	28.185	26.714	26.707	26.170
70	27.861	28.583	27.111	27.111	26.568
71	28.259	28.982	27.509	27.502	26.966
72	28.657	29.380	27.907	27.907	27.364
73	29.055	29.778	28.305	28.298	27.762
74	29.453	30.176	28.703	28.703	28.160
75	29.850	30.574	29.100	29.094	28.558
76	30.248	30.972	29.498	29.498	28.957
77	30.646	31.370	29.896	29.889	29.355
78	31.044	31.768	30.294	30.294	29.753
79	31.441	32.167	30.691	30.685	30.151
80	31.839	32.565	31.089	31.089	30.549
81	32.237	32.963	31.487	31.481	30.947
82	32.635	33.361	31.885	31.885	31.345
83	33.033	33.759	32.283	32.277	31.743
84	33.430	34.157	32.680	32.680	32.141
85	33.828	34.555	33.078	33.072	32.539
86	34.226	34.953	33.476	33.476	32.937
87	34.624	35.351	33.874	33.868	33.336
88	35.022	35.749	34.272	34.272	33.734
89	35.419	36.147	34.669	34.664	34.132
90	35.817	36.545	35.067	35.067	34.530
91	36.215	36.943	35.465	35.460	34.928
92	36.613	37.341	35.863	35.863	35.326
93	37.011	37.739	36.261	36.255	35.724
94	37.408	38.137	36.658	36.658	36.122
95	37.806	38.536	37.056	37.051	36.520
96	38.204	38.934	37.454	37.454	36.918
97	38.602	39.332	37.852	37.847	37.316
98	39.000	39.730	38.250	38.250	37.714
99	39.397	40.128	38.647	38.643	38.112
100	39.795	40.526	39.045	39.045	38.510
101	40.193	40.924	39.443	39.438	38.908
102	40.591	41.322	39.841	39.841	39.306
103	40.989	41.720	40.239	40.234	39.704
104	41.387	42.118	40.637	40.637	40.102
105	41.784	42.516	41.034	41.030	40.500
106	42.182	42.914	41.432	41.432	40.898
107	42.580	43.312	41.830	41.825	41.296
108	42.978	43.710	42.228	42.228	41.694
109	43.376	44.108	42.626	42.621	42.092
110	43.774	44.506	43.024	43.024	42.490
111	44.171	44.904	43.421	43.417	42.888
112	44.569	45.302	43.819	43.819	43.286
113	44.967	45.700	44.217	44.213	43.684
114	45.365	46.098	44.615	44.615	44.082
115	45.763	46.496	45.013	45.008	44.480
116	46.161	46.894	45.411	45.411	44.878
117	46.558	47.292	45.808	45.804	45.276
118	46.956	47.690	46.206	46.206	45.674
119	47.354	48.088	46.604	46.600	46.072
120	47.752	48.486	47.002	47.002	46.470

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).