20A18

Metric Roller Chain Sprocket

Item #100966892

25.03 mm Minimum Bore

151.83 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

Inch/Metric	Metric
Hardened Teeth	Without Hardened Teeth
Outside Dia.	203.48 mm
Bore Range [Min]	25.03 mm
Family Name	No. 20 - 31.750 mm Pitch - Single - A
Bore Range [Max]	151.83 mm
Single Strand Tooth Thickness	18.59 mm
Pitch Root Diameter	163.8 mm
Bore Type	Reborable
No. of Teeth	18
Outside Dia. [Min]	203.48 mm
Sprocket Style	A
Pitch Diameter	182.8 mm
Width Across Teeth	18.59 mm
Hub Dia.	N/A
Chain No.	20B, 20B-1
Pin Diameter	19.05 mm
Material	Steel
Hub Length Thru	N/A
No. of Strands Across	1
Martin No.	20A18
Root Diameter	163.8 mm
Length Through Bore	18.59 mm
Caliper Diameter	163.79 mm
Chain Pitch	31.75 mm
Pitch Diameter [Min]	182.8 mm
Series	A
Bore Style	Minimum Bore
Hub Projection	N/A
Weight	7.0 LB
EAN or UPC	697950403854