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ASA25SR21 21 Tooth ASA Simplex Pilot Bore Sprocket

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ASA25SR21 21 Tooth ASA Simplex Pilot Bore Sprocket

£7.97 Inc VAT
£6.64 Ex VAT

21 Tooth Simplex Sprockets
American Standard
1/4" x 1/8"
Steel C45, UNI7845

Tooth Radius r3 = 6.4

Radius size C = 0.7

Tooth width B1 = 2.9

All dimensions in mm

Intermediate sizes & special platewheels to drawing

Standard : to DIN 8188 - ISO/R 606 - ANSI B29.1
No. Teeth Outside Diam. Pitch Diam. Simplex
Dm d1 A
8 19.4 16.58 10 6 12
9 21.4 18.56 11.5 6 12
10 23.3 20.55 13 6 12
11 25.3 22.54 15 8 13
12 27.3 26.53 17 8 13
13 29.3 39.80 17 8 13
14 31.3 28.53 17 8 13
15 33.3 30.53 20 8 13
16 35.3 32.55 22 8 14
17 37.3 34.55 22 8 14
18 39.4 36.56 25 8 14
19 41.4 38.58 25 8 14
20 43.4 40.58 25 8 14
21 45.4 42.60 30 8 14
22 47.4 44.62 30 8 14
23 49.4 46.63 30 8 14
24 51.4 48.64 30 8 14
25 53.5 50.66 30 8 14
26 55.5 52.67 30 8 16
27 57.5 54.69 30 8 16
30 63.6 60.75 30 8 16
38 79.7 76.89 30 8 16
40 83.7 80.93 30 8 16

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