20B30

Metric Roller Chain Sprocket

Item #100966966

31.88 mm Minimum Bore

90 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

Caliper Diameter	284.7 mm
Bore Range [Min]	31.88 mm
Chain No.	20B, 20B-1
Bore Style	Minimum Bore
Series	B
No. of Teeth	30
Pitch Diameter	303.7 mm
Pitch Diameter [Min]	303.7 mm
Outside Dia.	324.38 mm
Length Through Bore	51.05 mm
Sprocket Style	B
Width Across Teeth	18.59 mm
Material	Steel
Pitch Root Diameter	284.7 mm
Single Strand Tooth Thickness	18.59 mm
Pin Diameter	19.05 mm
Hub Length Thru	32.41 mm
Outside Dia. [Min]	324.38 mm
No. of Strands Across	1
Hardened Teeth	Without Hardened Teeth
Chain Pitch	31.75 mm
Bore Type	Reborable
Hub Dia.	127 mm
Martin No.	20B30
Family Name	No. 20 - 31.750 mm Pitch - Single - Type B & C
Root Diameter	284.7 mm
Bore Range [Max]	90 mm
Inch/Metric	Metric
Weight	40.7 LB
EAN or UPC	697950404080