Tables / ANSI 120

Sprocket chart 1 1/2" x 1" — ANSI 120 (24A)

Chain American ANSI B29.1 · pitch 1.500" (38.10 mm) · roller Ø 0.875" · inner width 0.993" · simplex tooth width 0.943". Dimensions in inches. Tap a row to open it in the calculator (duplex, triplex, mm, material).

N	PD	OD	BD	CD	Max hub
8	3.920	4.521	3.044	3.044	2.109
9	4.386	5.021	3.511	3.444	2.609
10	4.854	5.517	3.979	3.979	3.104
11	5.324	6.009	4.449	4.395	3.596
12	5.796	6.498	4.920	4.920	4.086
13	6.268	6.986	5.393	5.347	4.574
14	6.741	7.472	5.866	5.866	5.060
15	7.215	7.957	6.339	6.300	5.545
16	7.689	8.441	6.814	6.814	6.029
17	8.163	8.924	7.288	7.253	6.512
18	8.638	9.407	7.763	7.763	6.995
19	9.113	9.889	8.238	8.207	7.477
20	9.589	10.371	8.713	8.713	7.959
21	10.064	10.852	9.189	9.161	8.440
22	10.540	11.333	9.665	9.665	8.921
23	11.016	11.813	10.141	10.115	9.401
24	11.492	12.294	10.617	10.617	9.882
25	11.968	12.774	11.093	11.069	10.362
26	12.444	13.254	11.569	11.569	10.841
27	12.921	13.733	12.045	12.024	11.321
28	13.397	14.213	12.522	12.522	11.801
29	13.874	14.692	12.998	12.978	12.280
30	14.350	15.172	13.475	13.475	12.759
31	14.827	15.651	13.952	13.933	13.239
32	15.303	16.130	14.428	14.428	13.718
33	15.780	16.609	14.905	14.887	14.197
34	16.257	17.088	15.382	15.382	14.675
35	16.734	17.566	15.859	15.842	15.154
36	17.211	18.045	16.335	16.335	15.633
37	17.687	18.524	16.812	16.796	16.112
38	18.164	19.002	17.289	17.289	16.590
39	18.641	19.481	17.766	17.751	17.069
40	19.118	19.959	18.243	18.243	17.547
41	19.595	20.438	18.720	18.706	18.026
42	20.072	20.916	19.197	19.197	18.504
43	20.549	21.394	19.674	19.660	18.982
44	21.026	21.873	20.151	20.151	19.461
45	21.503	22.351	20.628	20.615	19.939
46	21.980	22.829	21.105	21.105	20.417
47	22.458	23.307	21.582	21.570	20.895
48	22.935	23.786	22.059	22.059	21.373
49	23.412	24.264	22.537	22.525	21.852
50	23.889	24.742	23.014	23.014	22.330
51	24.366	25.220	23.491	23.479	22.808
52	24.843	25.698	23.968	23.968	23.286
53	25.320	26.176	24.445	24.434	23.764
54	25.798	26.654	24.922	24.922	24.242
55	26.275	27.132	25.400	25.389	24.720
56	26.752	27.610	25.877	25.877	25.198
57	27.229	28.088	26.354	26.344	25.676
58	27.707	28.566	26.831	26.831	26.154
59	28.184	29.044	27.309	27.299	26.632
60	28.661	29.522	27.786	27.786	27.110
61	29.138	30.000	28.263	28.253	27.587
62	29.615	30.477	28.740	28.740	28.065
63	30.093	30.955	29.218	29.208	28.543
64	30.570	31.433	29.695	29.695	29.021
65	31.047	31.911	30.172	30.163	29.499
66	31.525	32.389	30.649	30.649	29.977
67	32.002	32.867	31.127	31.118	30.455
68	32.479	33.345	31.604	31.604	30.932
69	32.956	33.822	32.081	32.073	31.410
70	33.434	34.300	32.559	32.559	31.888
71	33.911	34.778	33.036	33.028	32.366
72	34.388	35.256	33.513	33.513	32.844
73	34.866	35.733	33.990	33.982	33.321
74	35.343	36.211	34.468	34.468	33.799
75	35.820	36.689	34.945	34.937	34.277
76	36.298	37.167	35.422	35.422	34.755
77	36.775	37.644	35.900	35.892	35.232
78	37.252	38.122	36.377	36.377	35.710
79	37.730	38.600	36.854	36.847	36.188
80	38.207	39.078	37.332	37.332	36.665
81	38.684	39.555	37.809	37.802	37.143
82	39.162	40.033	38.286	38.286	37.621
83	39.639	40.511	38.764	38.757	38.099
84	40.116	40.988	39.241	39.241	38.576
85	40.594	41.466	39.719	39.712	39.054
86	41.071	41.944	40.196	40.196	39.532
87	41.548	42.421	40.673	40.667	40.009
88	42.026	42.899	41.151	41.151	40.487
89	42.503	43.377	41.628	41.621	40.965
90	42.981	43.854	42.105	42.105	41.442
91	43.458	44.332	42.583	42.576	41.920
92	43.935	44.810	43.060	43.060	42.398
93	44.413	45.287	43.537	43.531	42.875
94	44.890	45.765	44.015	44.015	43.353
95	45.367	46.243	44.492	44.486	43.830
96	45.845	46.720	44.970	44.970	44.308
97	46.322	47.198	45.447	45.441	44.786
98	46.800	47.676	45.924	45.924	45.263
99	47.277	48.153	46.402	46.396	45.741
100	47.754	48.631	46.879	46.879	46.219
101	48.232	49.108	47.357	47.351	46.696
102	48.709	49.586	47.834	47.834	47.174
103	49.187	50.064	48.311	48.306	47.652
104	49.664	50.541	48.789	48.789	48.129
105	50.141	51.019	49.266	49.260	48.607
106	50.619	51.496	49.743	49.743	49.084
107	51.096	51.974	50.221	50.215	49.562
108	51.573	52.452	50.698	50.698	50.040
109	52.051	52.929	51.176	51.170	50.517
110	52.528	53.407	51.653	51.653	50.995
111	53.006	53.884	52.130	52.125	51.472
112	53.483	54.362	52.608	52.608	51.950
113	53.960	54.840	53.085	53.080	52.427
114	54.438	55.317	53.563	53.563	52.905
115	54.915	55.795	54.040	54.035	53.383
116	55.393	56.272	54.517	54.517	53.860
117	55.870	56.750	54.995	54.990	54.338
118	56.348	57.228	55.472	55.472	54.815
119	56.825	57.705	55.950	55.945	55.293
120	57.302	58.183	56.427	56.427	55.771

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).