12A40

Metric Roller Chain Sprocket

Item #100966372

24.02 mm Minimum Bore

224.52 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

Bore Range [Max]	224.52 mm
Chain No.	12B, 12B-1
Material	Steel
Series	A
Single Strand Tooth Thickness	11.1 mm
Outside Dia. [Min]	254.55 mm
No. of Teeth	40
Martin No.	12A40
Chain Pitch	19.05 mm
Hub Length Thru	N/A
Length Through Bore	11.1 mm
Bore Style	Minimum Bore
Hub Dia.	N/A
No. of Strands Across	1
Hardened Teeth	Without Hardened Teeth
Pitch Diameter [Min]	242.8 mm
Sprocket Style	A
Outside Dia.	254.55 mm
Bore Range [Min]	24.02 mm
Inch/Metric	Metric
Pitch Diameter	242.8 mm
Pitch Root Diameter	230.7 mm
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Root Diameter	230.7 mm
Pin Diameter	12.065 mm
Caliper Diameter	230.74 mm
Width Across Teeth	11.1 mm
Bore Type	Reborable
Hub Projection	N/A
Weight	17.64 LB
EAN or UPC	697950400884