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

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