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

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