D28B20

Metric Roller Chain Sprocket

Item #100967420

40 mm Minimum Bore

126 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	256.2 mm
Pitch Diameter	284.1 mm
Chain No.	28B, 28B-2
Hub Dia.	178 mm
No. of Teeth	20
Bore Type	Reborable
Material	Steel
Length Through Bore	119.99 mm
Inch/Metric	Metric
Outside Dia. [Min]	311.77 mm
Chain Pitch	44.45 mm
Family Name	No. 28 - 44.450 mm Pitch - Double - Type B & C
Bore Style	Minimum Bore
Single Strand Tooth Thickness	28.83 mm
Pitch Diameter [Min]	284.1 mm
Bore Range [Max]	126 mm
Pitch Root Diameter	256.2 mm
Root Diameter	256.2 mm
Martin No.	28B20
Width Across Teeth	88.39 mm
Hardened Teeth	Without Hardened Teeth
Series	B
Sprocket Style	B
Bore Range [Min]	40 mm
Outside Dia.	311.77 mm
Pin Diameter	27.94 mm
Hub Length Thru	120 mm
No. of Strands Across	2
Weight	93.67 LB
EAN or UPC	697950407258