12A54

Metric Roller Chain Sprocket

Item #100966382

30.02 mm Minimum Bore

309.54 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.

Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
Bores are concentric to pitch line, minimizing run out
Precise machining and processes ensure consistent finish and high quality
Manufactured of high carbon steel

Specifications

Inch/Metric	Metric
Root Diameter	315.6 mm
Bore Range [Min]	30.02 mm
Pitch Diameter	327.6 mm
Length Through Bore	11.1 mm
Bore Style	Minimum Bore
Hardened Teeth	Without Hardened Teeth
No. of Strands Across	1
Outside Dia.	339.38 mm
Pitch Diameter [Min]	327.6 mm
No. of Teeth	54
Pitch Root Diameter	315.6 mm
Hub Projection	N/A
Hub Dia.	N/A
Single Strand Tooth Thickness	11.1 mm
Martin No.	12A54
Material	Steel
Bore Range [Max]	309.54 mm
Chain No.	12B, 12B-1
Chain Pitch	19.05 mm
Hub Length Thru	N/A
Width Across Teeth	11.1 mm
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Outside Dia. [Min]	339.38 mm
Pin Diameter	12.065 mm
Series	A
Caliper Diameter	315.57 mm
Bore Type	Reborable
Sprocket Style	A
Weight	16.16 LB
EAN or UPC	697950401089