20A12

Metric Roller Chain Sprocket

Item #100966886

25.02 mm Minimum Bore

90.26 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.

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
Manufactured of high carbon steel

Specifications

Inch/Metric	Metric
Hub Dia.	N/A
Single Strand Tooth Thickness	18.59 mm
Pitch Diameter [Min]	122.7 mm
Martin No.	20A12
Bore Range [Min]	25.02 mm
Pitch Root Diameter	103.6 mm
Hub Projection	N/A
Chain Pitch	31.75 mm
Bore Style	Minimum Bore
No. of Teeth	12
Bore Range [Max]	90.26 mm
Pitch Diameter	122.7 mm
Chain No.	20B, 20B-1
Hardened Teeth	Without Hardened Teeth
Bore Type	Reborable
Caliper Diameter	103.62 mm
Family Name	No. 20 - 31.750 mm Pitch - Single - A
Length Through Bore	18.59 mm
Width Across Teeth	18.59 mm
Material	Steel
Pin Diameter	19.05 mm
Series	A
Sprocket Style	A
No. of Strands Across	1
Hub Length Thru	N/A
Outside Dia.	143.31 mm
Outside Dia. [Min]	143.31 mm
Root Diameter	103.6 mm
Weight	4.21 LB
EAN or UPC	697950403731