28C57

Metric Roller Chain Sprocket

Item #100967223

40.41 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

Length Through Bore	127 mm
No. of Strands Across	1
Hardened Teeth	Without Hardened Teeth
Chain Pitch	44.45 mm
Outside Dia. [Min]	834.52 mm
Root Diameter	779 mm
Pitch Root Diameter	779 mm
Width Across Teeth	29.44 mm
Pitch Diameter [Min]	806.9 mm
Hub Length Thru	127 mm
Bore Type	Reborable
Single Strand Tooth Thickness	29.44 mm
Outside Dia.	834.52 mm
Pin Diameter	27.94 mm
Inch/Metric	Metric
Bore Style	Minimum Bore
Pitch Diameter	806.9 mm
Material	Steel
No. of Teeth	57
Sprocket Style	C
Family Name	No. 28 - 44.450 mm Pitch - Single - Type B & C
Hub Dia.	177.98 mm
Caliper Diameter	778.65 mm
Chain No.	28B, 28B-1
Bore Range [Min]	40.41 mm
Bore Range [Max]	126 mm
Series	C
Martin No.	28C57
Weight	282.0 LB
EAN or UPC	697950407067