BS (12B) Sprockets – 3/4

Tooth radius: r₃ = 19
Radius size: C = 2
Tooth width: B₁ = 11.1
Tooth width: b₁ = 10.8
Tooth width: B₂ = 30.3
Tooth width: B₃ = 49.8

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	57.6	49.78	31	12	30	31	12	45	31	16	65
9	62	55.70	37	12	30	37	12	45	37	16	65
10	69	61.64	42	12	30	42	12	45	42	16	65
11	75	67.61	46	14	35	47	16	50	47	20	70
12	81.5	73.60	52	14	35	53	16	50	53	20	70
13	87.5	79.59	58	14	35	59	16	50	59	20	70
14	93.6	85.61	64	14	35	65	16	50	65	20	70
15	99.8	91.63	70	14	35	71	16	50	71	20	70
16	105.5	97.65	75	16	35	77	20	50	77	20	70
17	111.5	103.67	80	16	35	83	20	50	83	20	70
18	118	109.71	80	16	35	89	20	50	89	20	70
19	124.2	115.75	80	16	35	95	20	50	95	20	70
20	129.7	121.78	80	16	35	100	20	50	100	20	70
21	136	127.82	90	20	40	100	20	50	100	20	70
22	141.8	133.86	90	20	40	100	20	50	100	20	70
23	149	139.90	90	20	40	110	20	50	110	20	70
24	153.9	145.94	90	20	40	110	20	50	110	20	70

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	160	152.00	90	20	40	120	20	50	120	20	70
26	165.9	158.04	95	20	40	120	20	50	120	20	70
27	172.3	164.09	95	20	40	120	20	50	120	20	70
28	178	170.13	95	20	40	120	20	50	120	20	70
29	184.1	176.19	95	20	40	120	20	50	120	20	70
30	190.5	182.25	95	20	40	120	20	50	120	20	70
31	196.3	188.31	100	20	40	130	20	50	130	25	70
32	203.3	194.35	100	20	40	130	20	50	130	25	70
33	209.3	200.40	100	20	40	130	20	50	130	25	70
34	214.6	206.46	100	20	40	130	20	50	130	25	70
35	221	212.52	100	20	40	130	20	50	130	25	70
36	226.8	218.58	100	20	40	130	25	50	130	25	70
37	232.9	224.64	100	20	40	130	25	50	130	25	70
38	239	230.69	100	20	40	130	25	50	130	25	70
39	245.1	236.75	100	20	40	130	25	50	130	25	70
40	251.3	242.81	100	20	40	130	25	50	130	25	70
57	355.4	345.81	118	25	61	136	25	62

* 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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