BS Cast Iron Sprockets 10B, 12B – ISO/R 606

Cast Iron Sprockets (10B) 5/8″ x 3/8″ (British Standard) to ISO/R 606

No. teeth	de	dp	Simplex			Duplex			Triplex
No. teeth	de	dp	dm	D1*	A	dm	D1*	A	dm	D1*	A
38	199.2	192.24	80	19	40	100	29	50	100	31	60
45	235.0	227.58	80	19	40	100	29	50	100	31	60
57	296.0	288.18	90	23	45	100	29	56	100	31	63
**76	392.1	384.16	90	23	50	100	29	63	110	34	67
**95	488.5	480.14	100	23	56	110	29	63	125	34	70
**114	584.1	576.13	100	23	56	125	29	70	125	34	80

**Simplex sprockets with rim reinforcement on both sides

Tooth radius: r₃ = 16
Radius size: C = 1.6
Tooth width: B₁ = 9.1

Tooth width: b₁ = 9.0
Tooth width: B₂ = 25.5
Tooth width: B₃ = 42.1

Cast Iron Sprockets (12B) 3/4″ x 7/16″ (British Standard) to ISO/R 606

No. teeth	de	dp	Simplex			Duplex			Triplex
No. teeth	de	dp	dm	D1*	A	dm	D1*	A	dm	D1*	A
38	239	230.69	100	23	56	110	29	63	140	30	70
45	282.5	273.10	100	23	56	110	29	63	140	30	70
57	355.4	345.81	100	29	56	120	29	63	140	39	70
76	469.9	460.99	100	29	56	135	29	63	160	39	75
**95	585.1	576.17	100	29	65	135	29	70	170	39	82
**114	700.6	691.36	100	29	65	135	29	70	170	49	82

** Simplex sprockets with rim reinforcement on both sides

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

* 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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