4SR21 08B-1 21T Simplex Pilot Bore Sprocket Stainless

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4SR21 08B-1 21T Simplex Pilot Bore Sprocket Stainless

£40.52 Inc VAT
£33.77 Ex VAT

21 Tooth Simplex Sprockets
British Standard
1/2" x 5/16"
Stainless Steel 304

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
13 57.4 53.06 37 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
23 98.2 93.27 70 14 28
25 105.8 101.33 70 14 28
30 126.1 121.50 80 16 30
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