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