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4SR20 08B-1 20 Tooth Simplex Pilot Bore Sprocket

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4SR20 08B-1 20 Tooth Simplex Pilot Bore Sprocket

£9.92 Inc VAT
£8.27 Ex VAT

20 Tooth Simplex Sprockets
British Standard
08B-1 - 1/2" x 5/16"
Steel C45, UNI7845

Tooth Radius r3 = 13

Radius size C = 1.3

Tooth width B1 = 7.2

All dimensions in mm

Intermediate sizes & special platewheels to drawing

Standard : to DIN 8187 ISO/R 606
No. Teeth Outside Diam. Pitch Diam. Simplex
Dm d1 A
9 41.0 37.13 24 10 25
10 45.2 41.10 26 10 25
11 48.7 45.07 29 10 25
12 53.0 49.07 33 10 28
13 57.4 53.06 37 10 28
14 61.8 57.07 41 10 28
15 65.5 61.09 45 10 28
16 69.5 65.10 50 12 28
17 73.6 69.11 52 12 28
18 77.8 73.14 56 12 28
19 81.7 77.16 60 12 28
20 85.8 81.19 64 12 28
21 89.7 85.22 68 12 28
22 93.8 89.24 70 12 28
23 98.2 93.27 70 14 28
24 101.8 97.29 70 14 28
25 105.8 101.33 70 14 28
26 110.0 105.36 70 16 30
27 114.0 109.40 70 16 30
28 118.0 113.42 70 16 30
29 122.0 117.46 80 16 30
30 126.1 121.50 80 16 30
31 130.2 125.54 90 16 30
32 134.3 129.56 90 16 30
33 138.4 133.60 90 16 30
34 142.6 137.64 90 16 30
35 146.7 141.68 90 16 30
36 151.0 145.72 90 16 35
37 154.6 149.76 90 16 35
38 158.6 153.80 90 16 35
40 166.8 161.87 90 16 35
45 140.7 136.55 70 19 35
60 248.6 242.66 70 19 35
64 265.1 258.82 70 19 35

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