12A42

Metric Roller Chain Sprocket

Item #100966374

24.02 mm Minimum Bore

236.67 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.

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
Manufactured of high carbon steel

Specifications

Martin No.	12A42
Bore Type	Reborable
Pitch Diameter [Min]	254.9 mm
Bore Range [Max]	236.67 mm
Inch/Metric	Metric
Caliper Diameter	242.85 mm
Hub Dia.	N/A
Hub Length Thru	N/A
Length Through Bore	11.1 mm
Pitch Root Diameter	242.9 mm
No. of Teeth	42
Pin Diameter	12.065 mm
Bore Range [Min]	24.02 mm
Chain No.	12B, 12B-1
Bore Style	Minimum Bore
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Sprocket Style	A
Outside Dia. [Min]	266.66 mm
Hub Projection	N/A
Series	A
Hardened Teeth	Without Hardened Teeth
Single Strand Tooth Thickness	11.1 mm
No. of Strands Across	1
Material	Steel
Root Diameter	242.9 mm
Pitch Diameter	254.9 mm
Chain Pitch	19.05 mm
Outside Dia.	266.66 mm
Width Across Teeth	11.1 mm
Weight	8.81 LB
EAN or UPC	697950400921