12A31

Metric Roller Chain Sprocket

Item #100966363

19.02 mm Minimum Bore

169.8 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

Hardened Teeth	Without Hardened Teeth
Inch/Metric	Metric
Pitch Root Diameter	176.2 mm
Outside Dia.	200.05 mm
Bore Range [Min]	19.02 mm
Hub Dia.	N/A
Length Through Bore	11.1 mm
Hub Projection	N/A
Bore Type	Reborable
Pitch Diameter [Min]	188.3 mm
Caliper Diameter	175.99 mm
No. of Strands Across	1
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Series	A
Outside Dia. [Min]	200.05 mm
Width Across Teeth	11.1 mm
Martin No.	12A31
Bore Range [Max]	169.8 mm
Bore Style	Minimum Bore
No. of Teeth	31
Material	Steel
Pin Diameter	12.065 mm
Single Strand Tooth Thickness	11.1 mm
Root Diameter	176.2 mm
Pitch Diameter	188.3 mm
Hub Length Thru	N/A
Chain No.	12B, 12B-1
Sprocket Style	A
Chain Pitch	19.05 mm
Weight	4.74 LB
EAN or UPC	697950400709