12A45

Metric Roller Chain Sprocket

Item #100966377

25.02 mm Minimum Bore

254.89 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

Material	Steel
Hardened Teeth	Without Hardened Teeth
Outside Dia.	284.84 mm
Bore Style	Minimum Bore
Hub Dia.	N/A
Root Diameter	261 mm
Pitch Diameter	273.1 mm
No. of Teeth	45
Martin No.	12A45
Caliper Diameter	260.86 mm
Inch/Metric	Metric
No. of Strands Across	1
Sprocket Style	A
Bore Range [Max]	254.89 mm
Width Across Teeth	11.1 mm
Hub Length Thru	N/A
Hub Projection	N/A
Chain No.	12B, 12B-1
Length Through Bore	11.1 mm
Pin Diameter	12.065 mm
Single Strand Tooth Thickness	11.1 mm
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Outside Dia. [Min]	284.84 mm
Pitch Root Diameter	261 mm
Series	A
Bore Type	Reborable
Bore Range [Min]	25.02 mm
Chain Pitch	19.05 mm
Pitch Diameter [Min]	273.1 mm
Weight	24.97 LB
EAN or UPC	697950400983