D28B21

Metric Roller Chain Sprocket

Item #100967421

40 mm Minimum Bore

126 mm Maximum Bore

+ Show More

Auto Replenish

each One-time purchase

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]	298.2 mm
Root Diameter	270.3 mm
Pin Diameter	27.94 mm
Bore Range [Min]	40 mm
Inch/Metric	Metric
Pitch Root Diameter	270.3 mm
Single Strand Tooth Thickness	28.83 mm
Outside Dia. [Min]	325.86 mm
Family Name	No. 28 - 44.450 mm Pitch - Double - Type B & C
Sprocket Style	B
Bore Style	Minimum Bore
Hardened Teeth	Without Hardened Teeth
Bore Range [Max]	126 mm
Bore Type	Reborable
Series	B
Caliper Diameter	269.46 mm
Pitch Diameter	298.2 mm
Hub Dia.	178 mm
No. of Teeth	21
Hub Length Thru	90.64 mm
Length Through Bore	120.02 mm
Material	Steel
Outside Dia.	325.86 mm
Width Across Teeth	88.39 mm
Chain Pitch	44.45 mm
Chain No.	28B, 28B-2
Martin No.	28B21
No. of Strands Across	2
Weight	102.9 LB
EAN or UPC	697950407265