Tables / 28B

Sprocket chart 1 3/4" x 1 1/4" — 28B

Chain European ISO 606 / DIN 8187 · pitch 1.750" (44.45 mm) · roller Ø 1.100" · inner width 1.220" · simplex tooth width 1.159". Dimensions in inches. Tap a row to open it in the calculator (duplex, triplex, mm, material).

N	PD	OD	BD	CD	Max hub
8	4.573	5.149	3.473	3.473	2.677
9	5.117	5.718	4.017	3.939	3.260
10	5.663	6.284	4.563	4.563	3.838
11	6.212	6.849	5.112	5.048	4.412
12	6.761	7.413	5.661	5.661	4.983
13	7.313	7.976	6.213	6.159	5.552
14	7.864	8.538	6.764	6.764	6.119
15	8.417	9.099	7.317	7.271	6.685
16	8.970	9.660	7.870	7.870	7.250
17	9.524	10.220	8.424	8.383	7.814
18	10.078	10.780	8.978	8.978	8.377
19	10.632	11.340	9.532	9.496	8.939
20	11.187	11.899	10.087	10.087	9.501
21	11.742	12.458	10.642	10.609	10.062
22	12.297	13.017	11.197	11.197	10.623
23	12.852	13.576	11.752	11.722	11.184
24	13.407	14.135	12.307	12.307	11.744
25	13.963	14.693	12.863	12.835	12.305
26	14.518	15.252	13.418	13.418	12.864
27	15.074	15.810	13.974	13.949	13.424
28	15.630	16.368	14.530	14.530	13.984
29	16.186	16.926	15.086	15.062	14.543
30	16.742	17.484	15.642	15.642	15.102
31	17.298	18.042	16.198	16.176	15.661
32	17.854	18.600	16.754	16.754	16.220
33	18.410	19.158	17.310	17.289	16.779
34	18.966	19.716	17.866	17.866	17.337
35	19.523	20.274	18.423	18.403	17.896
36	20.079	20.832	18.979	18.979	18.454
37	20.635	21.389	19.535	19.517	19.013
38	21.192	21.947	20.092	20.092	19.571
39	21.748	22.505	20.648	20.631	20.129
40	22.305	23.062	21.205	21.205	20.688
41	22.861	23.620	21.761	21.744	21.246
42	23.418	24.177	22.318	22.318	21.804
43	23.974	24.735	22.874	22.858	22.362
44	24.531	25.292	23.431	23.431	22.920
45	25.087	25.850	23.987	23.972	23.478
46	25.644	26.407	24.544	24.544	24.036
47	26.200	26.965	25.100	25.086	24.594
48	26.757	27.522	25.657	25.657	25.152
49	27.314	28.080	26.214	26.200	25.710
50	27.870	28.637	26.770	26.770	26.267
51	28.427	29.195	27.327	27.314	26.825
52	28.984	29.752	27.884	27.884	27.383
53	29.541	30.309	28.441	28.428	27.940
54	30.097	30.867	28.997	28.997	28.498
55	30.654	31.424	29.554	29.541	29.056
56	31.211	31.981	30.111	30.111	29.613
57	31.767	32.539	30.667	30.655	30.171
58	32.324	33.096	31.224	31.224	30.729
59	32.881	33.653	31.781	31.769	31.286
60	33.438	34.211	32.338	32.338	31.844
61	33.995	34.768	32.895	32.883	32.401
62	34.551	35.325	33.451	33.451	32.959
63	35.108	35.882	34.008	33.997	33.516
64	35.665	36.440	34.565	34.565	34.074
65	36.222	36.997	35.122	35.111	34.631
66	36.779	37.554	35.679	35.679	35.189
67	37.336	38.111	36.236	36.225	35.746
68	37.892	38.669	36.792	36.792	36.304
69	38.449	39.226	37.349	37.339	36.861
70	39.006	39.783	37.906	37.906	37.419
71	39.563	40.340	38.463	38.453	37.976
72	40.120	40.898	39.020	39.020	38.533
73	40.677	41.455	39.577	39.567	39.091
74	41.234	42.012	40.134	40.134	39.648
75	41.790	42.569	40.690	40.681	40.206
76	42.347	43.126	41.247	41.247	40.763
77	42.904	43.684	41.804	41.795	41.320
78	43.461	44.241	42.361	42.361	41.878
79	44.018	44.798	42.918	42.909	42.435
80	44.575	45.355	43.475	43.475	42.992
81	45.132	45.912	44.032	44.023	43.550
82	45.689	46.470	44.589	44.589	44.107
83	46.246	47.027	45.146	45.137	44.664
84	46.802	47.584	45.702	45.702	45.222
85	47.359	48.141	46.259	46.251	45.779
86	47.916	48.698	46.816	46.816	46.336
87	48.473	49.255	47.373	47.365	46.893
88	49.030	49.813	47.930	47.930	47.451
89	49.587	50.370	48.487	48.479	48.008
90	50.144	50.927	49.044	49.044	48.565
91	50.701	51.484	49.601	49.593	49.123
92	51.258	52.041	50.158	50.158	49.680
93	51.815	52.598	50.715	50.707	50.237
94	52.372	53.155	51.272	51.272	50.794
95	52.929	53.713	51.829	51.821	51.352
96	53.486	54.270	52.386	52.386	51.909
97	54.043	54.827	52.943	52.935	52.466
98	54.599	55.384	53.499	53.499	53.023
99	55.156	55.941	54.056	54.050	53.581
100	55.713	56.498	54.613	54.613	54.138
101	56.270	57.055	55.170	55.164	54.695
102	56.827	57.613	55.727	55.727	55.252
103	57.384	58.170	56.284	56.278	55.809
104	57.941	58.727	56.841	56.841	56.367
105	58.498	59.284	57.398	57.392	56.924
106	59.055	59.841	57.955	57.955	57.481
107	59.612	60.398	58.512	58.506	58.038
108	60.169	60.955	59.069	59.069	58.595
109	60.726	61.512	59.626	59.620	59.153
110	61.283	62.070	60.183	60.183	59.710
111	61.840	62.627	60.740	60.734	60.267
112	62.397	63.184	61.297	61.297	60.824
113	62.954	63.741	61.854	61.848	61.381
114	63.511	64.298	62.411	62.411	61.939
115	64.068	64.855	62.968	62.962	62.496
116	64.625	65.412	63.525	63.525	63.053
117	65.182	65.969	64.082	64.076	63.610
118	65.739	66.526	64.639	64.639	64.167
119	66.296	67.084	65.196	65.190	64.724
120	66.853	67.641	65.753	65.753	65.282

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).