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

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