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

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