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

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