12A48

Metric Roller Chain Sprocket

Item #100966380

25.02 mm Minimum Bore

273.11 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

Inch/Metric	Metric
Single Strand Tooth Thickness	11.1 mm
Chain No.	12B, 12B-1
Outside Dia. [Min]	303.02 mm
Sprocket Style	A
Pitch Diameter	291.3 mm
Series	A
Hardened Teeth	Without Hardened Teeth
Pitch Diameter [Min]	291.3 mm
No. of Strands Across	1
Material	Steel
Martin No.	12A48
Root Diameter	279.2 mm
Pitch Root Diameter	279.2 mm
Length Through Bore	11.1 mm
Bore Range [Min]	25.02 mm
Hub Length Thru	N/A
Bore Style	Minimum Bore
Bore Range [Max]	273.11 mm
Pin Diameter	12.065 mm
Caliper Diameter	279.21 mm
Width Across Teeth	11.1 mm
Chain Pitch	19.05 mm
Bore Type	Reborable
No. of Teeth	48
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Hub Projection	N/A
Outside Dia.	303.02 mm
Hub Dia.	N/A
Weight	12.67 LB
EAN or UPC	697950401041