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

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