D28B25

Metric Roller Chain Sprocket

Item #100967425

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

Bore Style	Minimum Bore
Hub Dia.	178 mm
Martin No.	28B25
Series	B
Hub Length Thru	90.64 mm
Inch/Metric	Metric
Outside Dia.	382.28 mm
Root Diameter	326.7 mm
Pitch Diameter	354.7 mm
Family Name	No. 28 - 44.450 mm Pitch - Double - Type B & C
No. of Teeth	25
Chain Pitch	44.45 mm
Single Strand Tooth Thickness	28.83 mm
Outside Dia. [Min]	382.28 mm
No. of Strands Across	2
Chain No.	28B, 28B-2
Pitch Diameter [Min]	354.7 mm
Pitch Root Diameter	326.7 mm
Bore Type	Reborable
Width Across Teeth	88.39 mm
Bore Range [Max]	126 mm
Sprocket Style	B
Material	Steel
Hardened Teeth	Without Hardened Teeth
Length Through Bore	119.99 mm
Bore Range [Min]	40 mm
Caliper Diameter	326.01 mm
Pin Diameter	27.94 mm
Weight	128.9 LB
EAN or UPC	697950407302