28A25

Metric Roller Chain Sprocket

Item #100967158

40.03 mm Minimum Bore

312.53 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
Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
Bores are concentric to pitch line, minimizing run out

Specifications

Outside Dia. [Min]	382.28 mm
Series	A
Martin No.	28A25
No. of Strands Across	1
Chain No.	28B, 28B-1
Bore Range [Max]	312.53 mm
Hub Length Thru	N/A
Pin Diameter	27.94 mm
Pitch Diameter [Min]	354.7 mm
Inch/Metric	Metric
Single Strand Tooth Thickness	29.44 mm
Bore Type	Reborable
Pitch Diameter	354.7 mm
Width Across Teeth	29.44 mm
Family Name	No. 28 - 44.450 mm Pitch - Single - A
Material	Steel
Caliper Diameter	326.01 mm
Root Diameter	326.7 mm
Bore Style	Minimum Bore
Hardened Teeth	Without Hardened Teeth
Sprocket Style	A
Hub Dia.	N/A
Outside Dia.	382.28 mm
Hub Projection	N/A
Length Through Bore	29.44 mm
Pitch Root Diameter	326.7 mm
No. of Teeth	25
Chain Pitch	44.45 mm
Bore Range [Min]	40.03 mm
Weight	36.99 LB
EAN or UPC	697950406817