D20B28

Metric Roller Chain Sprocket

Item #100967367

32 mm Minimum Bore

98 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

Root Diameter	264.5 mm
Pitch Diameter	283.6 mm
Pitch Root Diameter	264.5 mm
Martin No.	20B28
Family Name	No. 20 - 31.750 mm Pitch - Double - Type B & C
No. of Strands Across	2
Inch/Metric	Metric
Outside Dia.	304.21 mm
Outside Dia. [Min]	304.21 mm
Bore Type	Reborable
Hub Dia.	145.01 mm
Pin Diameter	19.05 mm
Single Strand Tooth Thickness	18.19 mm
Hardened Teeth	Without Hardened Teeth
Chain Pitch	31.75 mm
Width Across Teeth	54.64 mm
Hub Length Thru	80 mm
Caliper Diameter	264.52 mm
Bore Range [Max]	98 mm
Bore Style	Minimum Bore
Sprocket Style	B
No. of Teeth	28
Length Through Bore	80.01 mm
Bore Range [Min]	32 mm
Series	B
Pitch Diameter [Min]	283.6 mm
Chain No.	20B, 20B-2
Material	Steel
Weight	59.04 LB
EAN or UPC	697950405063