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

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