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

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