12A39

Metric Roller Chain Sprocket

Item #100966371

24.02 mm Minimum Bore

218.44 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

Length Through Bore	11.1 mm
Root Diameter	224.7 mm
Martin No.	12A39
Pitch Root Diameter	224.7 mm
Pitch Diameter	236.7 mm
Bore Range [Min]	24.02 mm
Chain No.	12B, 12B-1
Material	Steel
Series	A
Inch/Metric	Metric
Hub Dia.	N/A
Chain Pitch	19.05 mm
Outside Dia. [Min]	248.49 mm
Bore Style	Minimum Bore
Width Across Teeth	11.1 mm
Pin Diameter	12.065 mm
Single Strand Tooth Thickness	11.1 mm
No. of Teeth	39
Bore Range [Max]	218.44 mm
Pitch Diameter [Min]	236.7 mm
Hub Length Thru	N/A
Outside Dia.	248.49 mm
Bore Type	Reborable
Hub Projection	N/A
Sprocket Style	A
No. of Strands Across	1
Caliper Diameter	224.49 mm
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Hardened Teeth	Without Hardened Teeth
Weight	8.53 LB
EAN or UPC	697950400860