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

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