BS (20B) Sprockets – 1 1/4

Tooth radius: r₃ = 32
Radius size: C = 3.5
Tooth width: B₁ = 18.5
Tooth width: b₁ = 18.2
Tooth width: B₂ = 54.6
Tooth width: B₃ = 91

No. teeth	Outside dia. de	Pitch dia. dp	Simplex			Duplex			Triplex
No. teeth	Outside dia. de	Pitch dia. dp	dm	D1*	A	dm	D1*	A	dm	D1*	A
8	98.1	82.96	53	20	40	53	20	75	53	20	110
9	108	92.84	63	20	40	63	20	75	63	20	110
10	117.9	102.74	70	20	40	70	20	75	70	20	110
11	127.8	112.68	77	20	45	80	20	80	80	20	115
12	137.8	122.68	88	20	45	90	20	80	90	20	115
13	147.8	132.65	98	20	45	100	20	80	100	20	115
14	157.8	142.68	108	20	45	110	20	80	110	20	115
15	167.9	152.72	118	20	45	120	20	80	120	20	115
16	177.9	162.75	120	25	50	120	25	80	120	25	11
17	187.9	172.78	120	25	50	120	25	80	120	25	115
18	198	182.85	120	25	50	120	25	80	120	25	115
19	208.1	192.91	120	25	50	120	25	80	120	25	115
20	218.1	202.98	120	25	50	120	25	80	120	25	115
21	228.2	213.04	140	25	55	140	25	80	140	25	115
22	238.3	223.11	140	25	55	140	25	80	140	25	115
23	248.3	233.17	140	25	55	140	25	80	140	25	115
24	258.4	243.23	140	25	55	140	25	80	140	25	115

No. teeth	Outside dia. de	Pitch dia. dp	Simplex			Duplex			Triplex
No. teeth	Outside dia. de	Pitch dia. dp	dm	D1*	A	dm	D1*	A	dm	D1*	A
25	268.5	253.33	140	25	55	140	25	80	140	25	115
26	278.6	263.40	150	25	55	150	25	80	150	25	115
27	288.6	273.48	150	25	55	150	25	80	150	25	115
28	298.7	283.56	150	25	55	150	25	80	150	25	115
29	308.8	293.65	150	25	55	150	25	80	150	25	115
30	318.9	303.75	150	25	55	150	25	80	150	25	115
31	329	313.85	150	25	55	150	25	80	150	30	115
32	339.1	323.91	150	25	55	150	25	80	150	30	115
33	349.2	334.01	150	25	55	150	25	80	150	30	115
34	359.3	344.10	150	25	55	150	25	80	150	30	115
35	369.4	354.20	150	25	55	150	25	80	150	30	115
36	379.5	364.30	150	25	55	150	30	80	150	30	115
37	389.5	374.39	150	25	55	150	30	80	150	30	115
38	399.6	384.49	150	25	55	150	30	80	150	30	115
39	409.7	394.59	150	25	55	150	30	80	150	30	115
40	419.8	404.66	150	25	55	150	30	80	150	30	115

* Bore Ø H12
All dimensions in mm. Intermediate sizes & special sprockets to drawing up to 1000mm diameter. Standard to ISO/R 606

	Available from stock
	Special order – typically 7-10 days

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