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
Root Diameter	779 mm
Chain Pitch	44.45 mm
Sprocket Style	C
Chain No.	28B, 28B-1
Outside Dia.	834.52 mm
Bore Range [Min]	40.41 mm
Outside Dia. [Min]	834.52 mm
Bore Range [Max]	126 mm
Length Through Bore	127 mm
Hub Length Thru	127 mm
Caliper Diameter	778.65 mm
Family Name	No. 28 - 44.450 mm Pitch - Single - Type B & C
No. of Teeth	57
No. of Strands Across	1
Hub Dia.	177.98 mm
Pin Diameter	27.94 mm
Bore Style	Minimum Bore
Pitch Diameter	806.9 mm
Pitch Diameter [Min]	806.9 mm
Width Across Teeth	29.44 mm
Single Strand Tooth Thickness	29.44 mm
Series	C
Martin No.	28C57
Material	Steel
Pitch Root Diameter	779 mm
Inch/Metric	Metric
Bore Type	Reborable
Weight	282.0 LB
EAN or UPC	697950407067