Tables / ANSI 240

Sprocket chart 3" x 1 7/8" — ANSI 240 (48A)

Chain American ANSI B29.1 · pitch 3.000" (76.20 mm) · roller Ø 1.875" · inner width 1.864" · simplex tooth width 1.771". Dimensions in inches. Tap a row to open it in the calculator (duplex, triplex, mm, material).

N	PD	OD	BD	CD	Max hub
8	7.839	9.043	5.964	5.964	4.249
9	8.771	10.042	6.896	6.763	5.249
10	9.708	11.033	7.833	7.833	6.239
11	10.648	12.017	8.773	8.665	7.223
12	11.591	12.996	9.716	9.716	8.202
13	12.536	13.971	10.661	10.569	9.178
14	13.482	14.944	11.607	11.607	10.150
15	14.429	15.914	12.554	12.475	11.120
16	15.377	16.882	13.502	13.502	12.088
17	16.327	17.849	14.451	14.382	13.055
18	17.276	18.814	15.401	15.401	14.020
19	18.227	19.778	16.351	16.289	14.984
20	19.177	20.741	17.302	17.302	15.947
21	20.129	21.704	18.253	18.197	16.910
22	21.080	22.665	19.205	19.205	17.872
23	22.032	23.627	20.157	20.105	18.833
24	22.984	24.587	21.109	21.109	19.793
25	23.936	25.547	22.061	22.014	20.754
26	24.889	26.507	23.013	23.013	21.713
27	25.841	27.467	23.966	23.922	22.673
28	26.794	28.426	24.919	24.919	23.632
29	27.747	29.385	25.872	25.831	24.591
30	28.700	30.343	26.825	26.825	25.549
31	29.654	31.301	27.778	27.740	26.507
32	30.607	32.260	28.732	28.732	27.466
33	31.560	33.217	29.685	29.649	28.424
34	32.514	34.175	30.639	30.639	29.381
35	33.467	35.133	31.592	31.559	30.339
36	34.421	36.090	32.546	32.546	31.296
37	35.375	37.047	33.500	33.468	32.254
38	36.329	38.005	34.453	34.453	33.211
39	37.283	38.962	35.407	35.377	34.168
40	38.236	39.919	36.361	36.361	35.125
41	39.190	40.875	37.315	37.286	36.082
42	40.144	41.832	38.269	38.269	37.038
43	41.099	42.789	39.223	39.196	37.995
44	42.053	43.745	40.177	40.177	38.952
45	43.007	44.702	41.132	41.105	39.908
46	43.961	45.658	42.086	42.086	40.865
47	44.915	46.615	43.040	43.015	41.821
48	45.869	47.571	43.994	43.994	42.777
49	46.824	48.527	44.948	44.924	43.734
50	47.778	49.484	45.903	45.903	44.690
51	48.732	50.440	46.857	46.834	45.646
52	49.687	51.396	47.811	47.811	46.602
53	50.641	52.352	48.766	48.743	47.558
54	51.595	53.308	49.720	49.720	48.514
55	52.550	54.264	50.675	50.653	49.470
56	53.504	55.220	51.629	51.629	50.426
57	54.459	56.176	52.583	52.563	51.382
58	55.413	57.132	53.538	53.538	52.338
59	56.367	58.088	54.492	54.472	53.294
60	57.322	59.043	55.447	55.447	54.249
61	58.276	59.999	56.401	56.382	55.205
62	59.231	60.955	57.356	57.356	56.161
63	60.186	61.911	58.310	58.292	57.117
64	61.140	62.866	59.265	59.265	58.072
65	62.095	63.822	60.219	60.201	59.028
66	63.049	64.778	61.174	61.174	59.984
67	64.004	65.733	62.129	62.111	60.939
68	64.958	66.689	63.083	63.083	61.895
69	65.913	67.645	64.038	64.021	62.851
70	66.868	68.600	64.992	64.992	63.806
71	67.822	69.556	65.947	65.930	64.762
72	68.777	70.511	66.902	66.902	65.717
73	69.731	71.467	67.856	67.840	66.673
74	70.686	72.422	68.811	68.811	67.628
75	71.641	73.378	69.765	69.750	68.584
76	72.595	74.333	70.720	70.720	69.539
77	73.550	75.289	71.675	71.659	70.495
78	74.505	76.244	72.629	72.629	71.450
79	75.459	77.200	73.584	73.569	72.406
80	76.414	78.155	74.539	74.539	73.361
81	77.369	79.111	75.494	75.479	74.317
82	78.323	80.066	76.448	76.448	75.272
83	79.278	81.021	77.403	77.389	76.227
84	80.233	81.977	78.358	78.358	77.183
85	81.188	82.932	79.312	79.298	78.138
86	82.142	83.887	80.267	80.267	79.093
87	83.097	84.843	81.222	81.208	80.049
88	84.052	85.798	82.176	82.176	81.004
89	85.006	86.753	83.131	83.118	81.960
90	85.961	87.709	84.086	84.086	82.915
91	86.916	88.664	85.041	85.028	83.870
92	87.871	89.619	85.995	85.995	84.825
93	88.825	90.575	86.950	86.937	85.781
94	89.780	91.530	87.905	87.905	86.736
95	90.735	92.485	88.860	88.847	87.691
96	91.690	93.441	89.814	89.814	88.647
97	92.644	94.396	90.769	90.757	89.602
98	93.599	95.351	91.724	91.724	90.557
99	94.554	96.306	92.679	92.667	91.512
100	95.509	97.262	93.633	93.633	92.468
101	96.463	98.217	94.588	94.577	93.423
102	97.418	99.172	95.543	95.543	94.378
103	98.373	100.127	96.498	96.486	95.333
104	99.328	101.082	97.453	97.453	96.289
105	100.283	102.038	98.407	98.396	97.244
106	101.237	102.993	99.362	99.362	98.199
107	102.192	103.948	100.317	100.306	99.154
108	103.147	104.903	101.272	101.272	100.109
109	104.102	105.859	102.227	102.216	101.065
110	105.057	106.814	103.181	103.181	102.020
111	106.011	107.769	104.136	104.126	102.975
112	106.966	108.724	105.091	105.091	103.930
113	107.921	109.679	106.046	106.035	104.885
114	108.876	110.634	107.001	107.001	105.841
115	109.831	111.590	107.955	107.945	106.796
116	110.785	112.545	108.910	108.910	107.751
117	111.740	113.500	109.865	109.855	108.706
118	112.695	114.455	110.820	110.820	109.661
119	113.650	115.410	111.775	111.765	110.616
120	114.605	116.365	112.729	112.729	111.571

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).