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

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