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

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