Tables / 12B

Sprocket chart 3/4" x 7/16" — 12B

Chain European ISO 606 / DIN 8187 · pitch 0.750" (19.05 mm) · roller Ø 0.475" · inner width 0.460" · simplex tooth width 0.437". Dimensions in inches. Tap a row to open it in the calculator (duplex, triplex, mm, material).

N	PD	OD	BD	CD	Max hub
8	1.960	2.203	1.485	1.485	1.120
9	2.193	2.447	1.718	1.684	1.370
10	2.427	2.689	1.952	1.952	1.618
11	2.662	2.932	2.187	2.160	1.864
12	2.898	3.173	2.423	2.423	2.109
13	3.134	3.414	2.659	2.636	2.353
14	3.370	3.655	2.895	2.895	2.596
15	3.607	3.896	3.132	3.112	2.838
16	3.844	4.136	3.369	3.369	3.080
17	4.082	4.376	3.606	3.589	3.322
18	4.319	4.616	3.844	3.844	3.563
19	4.557	4.856	4.081	4.066	3.804
20	4.794	5.096	4.319	4.319	4.045
21	5.032	5.335	4.557	4.543	4.286
22	5.270	5.575	4.795	4.795	4.526
23	5.508	5.814	5.033	5.020	4.766
24	5.746	6.054	5.271	5.271	5.006
25	5.984	6.293	5.509	5.497	5.246
26	6.222	6.533	5.747	5.747	5.486
27	6.460	6.772	5.985	5.974	5.726
28	6.699	7.011	6.223	6.223	5.966
29	6.937	7.250	6.462	6.451	6.206
30	7.175	7.490	6.700	6.700	6.445
31	7.413	7.729	6.938	6.929	6.685
32	7.652	7.968	7.177	7.177	6.925
33	7.890	8.207	7.415	7.406	7.164
34	8.128	8.446	7.653	7.653	7.403
35	8.367	8.685	7.892	7.883	7.643
36	8.605	8.924	8.130	8.130	7.882
37	8.844	9.163	8.369	8.361	8.121
38	9.082	9.402	8.607	8.607	8.361
39	9.321	9.641	8.845	8.838	8.600
40	9.559	9.880	9.084	9.084	8.839
41	9.798	10.119	9.322	9.315	9.079
42	10.036	10.358	9.561	9.561	9.318
43	10.275	10.597	9.799	9.793	9.557
44	10.513	10.836	10.038	10.038	9.796
45	10.752	11.075	10.276	10.270	10.035
46	10.990	11.314	10.515	10.515	10.274
47	11.229	11.553	10.754	10.747	10.513
48	11.467	11.792	10.992	10.992	10.752
49	11.706	12.030	11.231	11.225	10.991
50	11.944	12.269	11.469	11.469	11.231
51	12.183	12.508	11.708	11.702	11.470
52	12.422	12.747	11.946	11.946	11.709
53	12.660	12.986	12.185	12.179	11.948
54	12.899	13.225	12.424	12.424	12.187
55	13.137	13.464	12.662	12.657	12.426
56	13.376	13.703	12.901	12.901	12.665
57	13.615	13.941	13.139	13.134	12.904
58	13.853	14.180	13.378	13.378	13.143
59	14.092	14.419	13.617	13.612	13.382
60	14.330	14.658	13.855	13.855	13.620
61	14.569	14.897	14.094	14.089	13.859
62	14.808	15.136	14.333	14.333	14.098
63	15.046	15.374	14.571	14.567	14.337
64	15.285	15.613	14.810	14.810	14.576
65	15.524	15.852	15.048	15.044	14.815
66	15.762	16.091	15.287	15.287	15.054
67	16.001	16.330	15.526	15.521	15.293
68	16.240	16.569	15.764	15.764	15.532
69	16.478	16.807	16.003	15.999	15.771
70	16.717	17.046	16.242	16.242	16.010
71	16.956	17.285	16.480	16.476	16.249
72	17.194	17.524	16.719	16.719	16.487
73	17.433	17.763	16.958	16.954	16.726
74	17.672	18.001	17.196	17.196	16.965
75	17.910	18.240	17.435	17.431	17.204
76	18.149	18.479	17.674	17.674	17.443
77	18.387	18.718	17.912	17.908	17.682
78	18.626	18.957	18.151	18.151	17.921
79	18.865	19.195	18.390	18.386	18.160
80	19.104	19.434	18.628	18.628	18.398
81	19.342	19.673	18.867	18.863	18.637
82	19.581	19.912	19.106	19.106	18.876
83	19.820	20.151	19.344	19.341	19.115
84	20.058	20.389	19.583	19.583	19.354
85	20.297	20.628	19.822	19.818	19.593
86	20.536	20.867	20.060	20.060	19.831
87	20.774	21.106	20.299	20.296	20.070
88	21.013	21.344	20.538	20.538	20.309
89	21.252	21.583	20.776	20.773	20.548
90	21.490	21.822	21.015	21.015	20.787
91	21.729	22.061	21.254	21.251	21.026
92	21.968	22.300	21.492	21.492	21.264
93	22.206	22.538	21.731	21.728	21.503
94	22.445	22.777	21.970	21.970	21.742
95	22.684	23.016	22.209	22.205	21.981
96	22.922	23.255	22.447	22.447	22.220
97	23.161	23.493	22.686	22.683	22.459
98	23.400	23.732	22.925	22.925	22.697
99	23.638	23.971	23.163	23.160	22.936
100	23.877	24.210	23.402	23.402	23.175
101	24.116	24.449	23.641	23.638	23.414
102	24.355	24.687	23.879	23.879	23.653
103	24.593	24.926	24.118	24.115	23.891
104	24.832	25.165	24.357	24.357	24.130
105	25.071	25.404	24.595	24.593	24.369
106	25.309	25.642	24.834	24.834	24.608
107	25.548	25.881	25.073	25.070	24.847
108	25.787	26.120	25.312	25.312	25.085
109	26.025	26.359	25.550	25.548	25.324
110	26.264	26.597	25.789	25.789	25.563
111	26.503	26.836	26.028	26.025	25.802
112	26.742	27.075	26.266	26.266	26.041
113	26.980	27.314	26.505	26.502	26.279
114	27.219	27.553	26.744	26.744	26.518
115	27.458	27.791	26.982	26.980	26.757
116	27.696	28.030	27.221	27.221	26.996
117	27.935	28.269	27.460	27.457	27.235
118	28.174	28.508	27.699	27.699	27.473
119	28.412	28.746	27.937	27.935	27.712
120	28.651	28.985	28.176	28.176	27.951

PD = p / sin(180°/N) · OD = European practice within the ISO 606 range · BD = PD − roller Ø · CD = BD (even N) or PD·cos(90°/N) − roller Ø (odd N).