20A9

Metric Roller Chain Sprocket

Item #100966883

25.02 mm Minimum Bore

59 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
Inch/Metric	Metric
Outside Dia.	113.47 mm
No. of Strands Across	1
No. of Teeth	9
Bore Range [Min]	25.02 mm
Caliper Diameter	72.37 mm
Bore Style	Minimum Bore
Hub Length Thru	N/A
Bore Type	Reborable
Bore Range [Max]	59 mm
Series	A
Width Across Teeth	18.59 mm
Pitch Diameter	92.8 mm
Pitch Diameter [Min]	92.8 mm
Hardened Teeth	Without Hardened Teeth
Pin Diameter	19.05 mm
Chain No.	20B, 20B-1
Pitch Root Diameter	73.8 mm
Outside Dia. [Min]	113.47 mm
Single Strand Tooth Thickness	18.59 mm
Martin No.	20A9
Material	Steel
Chain Pitch	31.75 mm
Hub Dia.	N/A
Hub Projection	N/A
Family Name	No. 20 - 31.750 mm Pitch - Single - A
Sprocket Style	A
Root Diameter	73.8 mm
Weight	0.95 LB
EAN or UPC	697950403670