D28B11

Metric Roller Chain Sprocket

Item #100967411

40 mm Minimum Bore

78 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

Series	B
No. of Strands Across	2
Root Diameter	129.8 mm
Pitch Root Diameter	129.8 mm
Caliper Diameter	128.23 mm
Inch/Metric	Metric
Width Across Teeth	88.39 mm
Outside Dia. [Min]	185.4 mm
No. of Teeth	11
Outside Dia.	185.4 mm
Hub Dia.	111.99 mm
Sprocket Style	B
Bore Style	Minimum Bore
Bore Type	Reborable
Chain No.	28B, 28B-2
Pitch Diameter	157.8 mm
Pin Diameter	27.94 mm
Hardened Teeth	Without Hardened Teeth
Pitch Diameter [Min]	157.8 mm
Single Strand Tooth Thickness	28.83 mm
Length Through Bore	119.99 mm
Material	Steel
Bore Range [Max]	78 mm
Martin No.	28B11
Bore Range [Min]	40 mm
Chain Pitch	44.45 mm
Hub Length Thru	120 mm
Family Name	No. 28 - 44.450 mm Pitch - Double - Type B & C
Weight	22.5 LB
EAN or UPC	697950407166