20B51

Metric Roller Chain Sprocket

Item #100966987

40 mm Minimum Bore

86 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

Hub Dia.	127 mm
Outside Dia.	536.39 mm
Martin No.	20B51
Material	Steel
Chain Pitch	31.75 mm
Caliper Diameter	496.45 mm
Root Diameter	496.7 mm
Chain No.	20B, 20B-1
Pitch Root Diameter	496.7 mm
Pitch Diameter	515.7 mm
Hardened Teeth	Without Hardened Teeth
Outside Dia. [Min]	536.39 mm
Hub Length Thru	64 mm
Pin Diameter	19.05 mm
Bore Type	Reborable
Bore Style	Minimum Bore
Bore Range [Min]	40 mm
Bore Range [Max]	86 mm
Single Strand Tooth Thickness	18.59 mm
Length Through Bore	64.01 mm
Width Across Teeth	18.59 mm
Series	B
Sprocket Style	B
No. of Strands Across	1
Family Name	No. 20 - 31.750 mm Pitch - Single - Type B & C
Inch/Metric	Metric
Pitch Diameter [Min]	515.7 mm
No. of Teeth	51
Weight	78.02 LB
EAN or UPC	697950404509