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No. 40, B Style, 1.125" Finished Bore
All dimensions are nominal values and for reference only
Unit of Measure

Specifications

Hub Diameter_SYN

 N/A 2.750 in

Length Through Bore_SYN

 N/A 1.000 in

Sprocket Style_SYN

 N/A B

Number of Teeth_SYN

 N/A 21

Bore Diameter_SYN

 N/A 1.125 in

Max. Bore

 N/A 1.875 in

Weight_SYN

 N/A 1.530 lb

Tooth Width_SYN

 N/A 0.284 in

Hardened Teeth 

 N/A Yes

Industry Equivalent

 N/A 40BS21 1 1/8

UPC Code

 N/A 097039324542

Chain Technical Data

Chain Pitch_SYN

 N/A 0.500 in

Chain Number_SYN

 N/A 40

Sprocket Diameters

Outside Diameter_SYN

 N/A 3.620 in

Pitch Diameter_SYN

 N/A 3.355 in

Caliper Sprocket Diameter at 3/8 in Pitch

 N/A 3.033 in