12A20

Metric Roller Chain Sprocket

Item #100966352

14.02 mm Minimum Bore

102.74 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

Width Across Teeth	11.1 mm
Martin No.	12A20
Chain Pitch	19.05 mm
Hardened Teeth	Without Hardened Teeth
Root Diameter	109.7 mm
Chain No.	12B, 12B-1
Bore Style	Minimum Bore
No. of Teeth	20
Bore Range [Max]	102.74 mm
Hub Length Thru	N/A
Pin Diameter	12.065 mm
Length Through Bore	11.1 mm
Pitch Diameter	121.8 mm
Pitch Root Diameter	109.7 mm
Pitch Diameter [Min]	121.8 mm
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Sprocket Style	A
Outside Dia. [Min]	133.52 mm
Hub Projection	N/A
Single Strand Tooth Thickness	11.1 mm
No. of Strands Across	1
Inch/Metric	Metric
Caliper Diameter	109.71 mm
Outside Dia.	133.52 mm
Hub Dia.	N/A
Bore Type	Reborable
Bore Range [Min]	14.02 mm
Series	A
Material	Steel
Weight	2.42 LB
EAN or UPC	697950400488