28A12

Metric Roller Chain Sprocket

Item #100967145

32.02 mm Minimum Bore

126.57 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

Pitch Diameter [Min]	171.7 mm
Pitch Root Diameter	143.8 mm
Outside Dia.	199.36 mm
Caliper Diameter	143.8 mm
Outside Dia. [Min]	199.36 mm
Root Diameter	143.8 mm
Pin Diameter	27.94 mm
Chain No.	28B, 28B-1
Length Through Bore	29.44 mm
Width Across Teeth	29.44 mm
Hub Dia.	N/A
Bore Range [Max]	126.57 mm
Hardened Teeth	Without Hardened Teeth
Single Strand Tooth Thickness	29.44 mm
Inch/Metric	Metric
Bore Style	Minimum Bore
No. of Strands Across	1
Hub Length Thru	N/A
Bore Range [Min]	32.02 mm
Bore Type	Reborable
No. of Teeth	12
Sprocket Style	A
Material	Steel
Hub Projection	N/A
Family Name	No. 28 - 44.450 mm Pitch - Single - A
Series	A
Chain Pitch	44.45 mm
Martin No.	28A12
Pitch Diameter	171.7 mm
Weight	8.7 LB
EAN or UPC	697950406558