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British-Standard-Sprockets
Unit of Measure
1 

Item #

Number of Teeth

d - Plane Bore

Max. Plain Bore

Style

Wt. LBS

Quantity
12B11 N/A 11 N/A 0.472 in N/A 1.260 in N/A S N/A 1.17 lb
12B12 N/A 12 N/A 0.472 in N/A 1.378 in N/A S N/A 1.48 lb
12B13 N/A 13 N/A 0.472 in N/A 1.496 in N/A S N/A 1.65 lb
12B14 N/A 14 N/A 0.472 in N/A 1.654 in N/A S N/A 2.01 lb
12B15 N/A 15 N/A 0.472 in N/A 1.772 in N/A S N/A 2.51 lb
12B16 N/A 16 N/A 0.630 in N/A 1.969 in N/A S N/A 2.80 lb
12B17 N/A 17 N/A 0.630 in N/A 2.047 in N/A S N/A 3.22 lb
12B18 N/A 18 N/A 0.630 in N/A 2.047 in N/A S N/A 3.73 lb
12B19 N/A 19 N/A 0.630 in N/A 2.362 in N/A E N/A 3.92 lb
12B20 N/A 20 N/A 0.630 in N/A 2.520 in N/A E N/A 4.63 lb
12B21 N/A 21 N/A 0.787 in N/A 2.520 in N/A E N/A 5.00 lb
12B22 N/A 22 N/A 0.787 in N/A 2.520 in N/A E N/A 5.25 lb
12B23 N/A 23 N/A 0.787 in N/A 2.638 in N/A E N/A 5.49 lb
12B24 N/A 24 N/A 0.787 in N/A 2.638 in N/A E N/A 5.78 lb
12B25 N/A 25 N/A 0.787 in N/A 2.638 in N/A E N/A 6.13 lb
12B26 N/A 26 N/A 0.787 in N/A 2.638 in N/A E N/A 6.37 lb
12B27 N/A 27 N/A 0.787 in N/A 2.638 in N/A E N/A 6.72 lb
12B28 N/A 28 N/A 0.787 in N/A 2.638 in N/A E N/A 6.88 lb
12B29 N/A 29 N/A 0.787 in N/A 2.638 in N/A E N/A 7.28 lb
12B30 N/A 30 N/A 0.787 in N/A 2.638 in N/A E N/A 7.58 lb
12B35 N/A 35 N/A 0.787 in N/A 2.638 in N/A E N/A 9.04 lb
12B40 N/A 40 N/A 0.984 in N/A 2.756 in N/A E N/A 11.51 lb
12B45 N/A 45 N/A 0.984 in N/A 2.756 in N/A E N/A 13.98 lb
12B60 N/A 60 N/A 1.260 in N/A 2.756 in N/A E N/A 25.22 lb
Unit of Measure
1