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No. 40, B Style, 1.188" Finished Bore
All dimensions are nominal values and for reference only
Unit of Measure

Specifications

Hub Diameter_SYN

3.500 in

Length Through Bore_SYN

1.125 in

Sprocket Style_SYN

B

Number of Teeth_SYN

42

Bore Diameter_SYN

1.188 in

Max. Bore

2.375 in

Weight_SYN

4.640 lb

Tooth Width_SYN

0.284 in

Hardened Teeth 

Yes

Industry Equivalent

40BS42 1 3/16

UPC Code

097039326171

Chain Technical Data

Chain Pitch_SYN

0.500 in

Chain Number_SYN

40

Sprocket Diameters

Outside Diameter_SYN

6.970 in

Pitch Diameter_SYN

6.691 in

Caliper Sprocket Diameter at 3/8 in Pitch

6.379 in