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

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