20A56

Metric Roller Chain Sprocket

Item #100966930

40 mm Minimum Bore

537.12 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.

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

Length Through Bore	18.59 mm
Root Diameter	547.2 mm
Width Across Teeth	18.59 mm
Pin Diameter	19.05 mm
Pitch Diameter	566.3 mm
No. of Strands Across	1
Chain No.	20B, 20B-1
Outside Dia.	586.89 mm
Outside Dia. [Min]	586.89 mm
Single Strand Tooth Thickness	18.59 mm
No. of Teeth	56
Sprocket Style	A
Caliper Diameter	547.2 mm
Pitch Root Diameter	547.2 mm
Hub Projection	N/A
Pitch Diameter [Min]	566.3 mm
Series	A
Family Name	No. 20 - 31.750 mm Pitch - Single - A
Bore Range [Min]	40 mm
Bore Style	Minimum Bore
Bore Range [Max]	537.12 mm
Hub Dia.	N/A
Inch/Metric	Metric
Martin No.	20A56
Chain Pitch	31.75 mm
Hub Length Thru	N/A
Hardened Teeth	Without Hardened Teeth
Material	Steel
Bore Type	Reborable
Weight	69.09 LB
EAN or UPC	697950404615