20A55

Metric Roller Chain Sprocket

Item #100966929

40 mm Minimum Bore

527.01 mm Maximum Bore

+ Show More

Auto Replenish

each One-time purchase

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

Width Across Teeth	18.59 mm
Hub Length Thru	N/A
Material	Steel
Root Diameter	537.1 mm
Caliper Diameter	536.87 mm
Single Strand Tooth Thickness	18.59 mm
Pitch Root Diameter	537.1 mm
No. of Strands Across	1
Sprocket Style	A
Bore Range [Min]	40 mm
Pitch Diameter	556.2 mm
Pin Diameter	19.05 mm
No. of Teeth	55
Martin No.	20A55
Bore Type	Reborable
Outside Dia. [Min]	576.79 mm
Bore Style	Minimum Bore
Bore Range [Max]	527.01 mm
Chain No.	20B, 20B-1
Series	A
Pitch Diameter [Min]	556.2 mm
Hub Dia.	N/A
Inch/Metric	Metric
Outside Dia.	576.79 mm
Chain Pitch	31.75 mm
Length Through Bore	18.59 mm
Family Name	No. 20 - 31.750 mm Pitch - Single - A
Hardened Teeth	Without Hardened Teeth
Hub Projection	N/A
Weight	66.4 LB
EAN or UPC	697950404592