12A57

Metric Roller Chain Sprocket

Item #100966383

32.02 mm Minimum Bore

327.75 mm Maximum Bore

+ Show More

Auto Replenish

each One-time purchase

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