Sprockets with Hub 1/2 B.S. British Standard Steel

No. Teeth	Outside Diam.	Pitch Diam.	Simplex			Duplex			Triplex
No. Teeth	Outside Diam.	Pitch Diam.	Dm	d1	A	Dm	d1	A	Dm	d1	A
8	37.2	33.18	20	10	25	20	10	32	20	10	46
9	41.0	37.13	24	10	25	24	10	32	24	12	46
10	45.2	41.10	26	10	25	28	10	32	28	12	46
11	48.7	45.07	29	10	25	32	12	35	32	14	50
12	53.0	49.07	33	10	28	35	12	35	35	14	50
13	57.4	53.06	37	10	28	38	12	35	38	14	50
14	61.8	57.07	41	10	28	42	12	35	42	14	50
15	65.5	61.09	45	10	28	46	12	35	46	14	50
16	69.5	65.10	50	12	28	50	14	35	50	16	50
17	73.6	69.11	52	12	28	54	14	35	54	16	50
18	77.8	73.14	56	12	28	58	14	35	58	16	50
19	81.7	77.16	60	12	28	62	14	35	62	16	50
20	85.8	81.19	64	12	28	66	14	35	66	16	50
21	89.7	85.22	68	12	28	70	16	40	70	20	55
22	93.8	89.24	70	12	28	70	16	40	70	20	55
23	98.2	93.27	70	14	28	70	16	40	70	20	55
24	101.8	97.29	70	14	28	75	16	40	75	20	55
25	105.8	101.33	70	14	28	80	16	40	80	20	55
26	110.0	105.36	70	16	30	85	20	40	85	20	55
27	114.0	109.40	70	16	30	85	20	40	85	20	55
28	118.0	113.42	70	16	30	90	20	40	90	20	55
29	122.0	117.46	80	16	30	95	20	40	95	20	55
30	126.1	121.50	80	16	30	100	20	40	100	20	55
31	130.2	125.54	90	16	30	100	20	40	110	20	55
32	134.3	129.56	90	16	30	100	20	40	110	20	55
33	138.4	133.60	90	16	30	100	20	40	110	20	55
34	142.6	137.64	90	16	30	100	20	40	110	20	55
35	146.7	141.68	90	16	30	100	20	40	110	20	55
36	151.0	145.72	90	16	35	110	20	40	120	25	55
37	154.6	149.76	90	16	35	110	20	40	120	25	55
38	158.6	153.80	90	16	35	110	20	40	120	25	55
39	162.7	157.83	90	16	35	110	20	40	120	25	55
40	166.8	161.87	90	16	35	110	20	40	120	25	55
45	140.7	136.55	70	19	35
57	176.9	172.91				70	19	40
60	248.6	242.66	70	19	35
64	265.1	258.82	70	19	35

Sprockets British Standard 1/2" x 5/16" Steel C45, UNI7845

Stock sizes

Available on short delivery

Tooth Radius r₃ = 13

Radius size C = 1.3

Tooth width B₁ = 7.2
Tooth width b₁ = 7.0
Tooth width B₂ = 21.0
Tooth width B₃ = 34.9

All dimensions in mm

Intermediate sizes & special platewheels to drawing up to 1000mm diameter

Standard : to DIN 8187 ISO/R 606

Please note : All dimensions including bore sizes subject to change.
If a dimension is critical to your application please contact our sales department for confirmation.
for special sprockets or reworked sprockets please contact our manufacturing department.

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