20B40

Metric Roller Chain Sprocket

Item #100966976

31.72 mm Minimum Bore

86 mm Maximum Bore

+ Show More

Auto Replenish

each One-time purchase

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

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