20A57

Metric Roller Chain Sprocket

Item #100966931

40 mm Minimum Bore

547.24 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.

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

Specifications

Pitch Diameter	576.4 mm
Length Through Bore	18.59 mm
Outside Dia.	596.99 mm
Sprocket Style	A
Single Strand Tooth Thickness	18.59 mm
Pitch Diameter [Min]	576.4 mm
Chain No.	20B, 20B-1
No. of Teeth	57
No. of Strands Across	1
Family Name	No. 20 - 31.750 mm Pitch - Single - A
Inch/Metric	Metric
Martin No.	20A57
Bore Type	Reborable
Bore Style	Minimum Bore
Width Across Teeth	18.59 mm
Hub Length Thru	N/A
Outside Dia. [Min]	596.99 mm
Hub Dia.	N/A
Root Diameter	557.3 mm
Caliper Diameter	557.08 mm
Hardened Teeth	Without Hardened Teeth
Hub Projection	N/A
Bore Range [Min]	40 mm
Bore Range [Max]	547.24 mm
Series	A
Pin Diameter	19.05 mm
Chain Pitch	31.75 mm
Pitch Root Diameter	557.3 mm
Material	Steel
Weight	72.66 LB
EAN or UPC	697950404639