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

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