20A13

Metric Roller Chain Sprocket

Item #100966887

25.02 mm Minimum Bore

100.58 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.

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

Specifications

Pin Diameter	19.05 mm
Pitch Diameter [Min]	132.7 mm
Outside Dia. [Min]	153.31 mm
Bore Type	Reborable
Bore Range [Min]	25.02 mm
Family Name	No. 20 - 31.750 mm Pitch - Single - A
Bore Style	Minimum Bore
Hub Projection	N/A
Outside Dia.	153.31 mm
Hub Dia.	N/A
Caliper Diameter	112.65 mm
Pitch Root Diameter	113.6 mm
Hardened Teeth	Without Hardened Teeth
Root Diameter	113.6 mm
Bore Range [Max]	100.58 mm
Width Across Teeth	18.59 mm
Martin No.	20A13
No. of Strands Across	1
Series	A
Hub Length Thru	N/A
Single Strand Tooth Thickness	18.59 mm
Pitch Diameter	132.7 mm
Chain No.	20B, 20B-1
No. of Teeth	13
Length Through Bore	18.59 mm
Material	Steel
Sprocket Style	A
Inch/Metric	Metric
Chain Pitch	31.75 mm
Weight	4.8 LB
EAN or UPC	697950403755