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

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