12A57

Metric Roller Chain Sprocket

Item #100966383

32.02 mm Minimum Bore

327.75 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

No. of Teeth	57
Outside Dia. [Min]	357.56 mm
Root Diameter	333.7 mm
Martin No.	12A57
Outside Dia.	357.56 mm
No. of Strands Across	1
Pitch Diameter [Min]	345.8 mm
Pitch Diameter	345.8 mm
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Hardened Teeth	Without Hardened Teeth
Hub Dia.	N/A
Pitch Root Diameter	333.7 mm
Hub Length Thru	N/A
Chain Pitch	19.05 mm
Pin Diameter	12.065 mm
Inch/Metric	Metric
Width Across Teeth	11.1 mm
Bore Type	Reborable
Chain No.	12B, 12B-1
Caliper Diameter	333.62 mm
Bore Range [Max]	327.75 mm
Sprocket Style	A
Single Strand Tooth Thickness	11.1 mm
Length Through Bore	11.1 mm
Series	A
Material	Steel
Bore Style	Minimum Bore
Bore Range [Min]	32.02 mm
Hub Projection	N/A
Weight	16.37 LB
EAN or UPC	697950401102