12A47

Metric Roller Chain Sprocket

Item #100966379

25.02 mm Minimum Bore

267.04 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

Series	A
Root Diameter	273.1 mm
Pitch Diameter [Min]	285.2 mm
Pin Diameter	12.065 mm
Pitch Root Diameter	273.1 mm
Material	Steel
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Bore Range [Min]	25.02 mm
Width Across Teeth	11.1 mm
Bore Style	Minimum Bore
Bore Range [Max]	267.04 mm
Caliper Diameter	272.99 mm
Outside Dia.	296.96 mm
Bore Type	Reborable
Hub Length Thru	N/A
Single Strand Tooth Thickness	11.1 mm
Hardened Teeth	Without Hardened Teeth
Martin No.	12A47
Chain No.	12B, 12B-1
Pitch Diameter	285.2 mm
Hub Projection	N/A
No. of Strands Across	1
No. of Teeth	47
Length Through Bore	11.1 mm
Chain Pitch	19.05 mm
Sprocket Style	A
Inch/Metric	Metric
Outside Dia. [Min]	296.96 mm
Hub Dia.	N/A
Weight	11.1 LB
EAN or UPC	697950401027