20B40

Metric Roller Chain Sprocket

Item #100966976

31.72 mm Minimum Bore

86 mm Maximum Bore

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Product Details

Maximum bores shown will accommodate standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at an angle to keyseat.

Bores are concentric to pitch line, minimizing run out
Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
Manufactured of high carbon steel
Precise machining and processes ensure consistent finish and high quality

Specifications

Outside Dia. [Min]	425.31 mm
Martin No.	20B40
Single Strand Tooth Thickness	18.59 mm
No. of Strands Across	1
Caliper Diameter	385.62 mm
Bore Style	Minimum Bore
Family Name	No. 20 - 31.750 mm Pitch - Single - Type B & C
Pin Diameter	19.05 mm
Pitch Diameter [Min]	404.7 mm
Inch/Metric	Metric
Sprocket Style	B
Chain No.	20B, 20B-1
Pitch Diameter	404.7 mm
Width Across Teeth	18.59 mm
Hardened Teeth	Without Hardened Teeth
Hub Dia.	127 mm
Hub Length Thru	64 mm
No. of Teeth	40
Bore Range [Max]	86 mm
Series	B
Material	Steel
Chain Pitch	31.75 mm
Bore Type	Reborable
Outside Dia.	425.31 mm
Length Through Bore	64.01 mm
Root Diameter	385.6 mm
Bore Range [Min]	31.72 mm
Pitch Root Diameter	385.6 mm
Weight	46.89 LB
EAN or UPC	697950404288