20A42

Metric Roller Chain Sprocket

Item #100966916

32 mm Minimum Bore

395.44 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

Length Through Bore	18.59 mm
Pitch Diameter	424.9 mm
Pin Diameter	19.05 mm
Single Strand Tooth Thickness	18.59 mm
Hardened Teeth	Without Hardened Teeth
Series	A
Inch/Metric	Metric
Bore Range [Min]	32 mm
Bore Range [Max]	395.44 mm
Bore Type	Reborable
Hub Projection	N/A
Pitch Root Diameter	405.8 mm
Material	Steel
Hub Length Thru	N/A
Caliper Diameter	405.81 mm
Chain No.	20B, 20B-1
Root Diameter	405.8 mm
Bore Style	Minimum Bore
Chain Pitch	31.75 mm
Hub Dia.	N/A
Outside Dia. [Min]	445.5 mm
Martin No.	20A42
Pitch Diameter [Min]	424.9 mm
No. of Strands Across	1
Width Across Teeth	18.59 mm
Sprocket Style	A
Family Name	No. 20 - 31.750 mm Pitch - Single - A
No. of Teeth	42
Outside Dia.	445.5 mm
Weight	39.52 LB
EAN or UPC	697950404332