D12B28

Metric Roller Chain Sprocket

Item #100965879

20 mm Minimum Bore

84 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

Chain No.	12B, 12B-2
No. of Teeth	28
Material	Steel
Root Diameter	158.1 mm
Bore Range [Min]	20 mm
Bore Range [Max]	84 mm
Bore Type	Reborable
Hub Length Thru	39.13 mm
Caliper Diameter	158.08 mm
Pin Diameter	12.065 mm
Width Across Teeth	30.33 mm
Pitch Diameter	170.1 mm
Pitch Diameter [Min]	170.1 mm
No. of Strands Across	2
Outside Dia.	181.89 mm
Chain Pitch	19.05 mm
Hub Dia.	119.99 mm
Length Through Bore	50.01 mm
Outside Dia. [Min]	181.89 mm
Series	B
Sprocket Style	B
Hardened Teeth	Without Hardened Teeth
Martin No.	12B28
Family Name	No. 12 - 19.050 mm Pitch - Double - Type B & C
Inch/Metric	Metric
Single Strand Tooth Thickness	10.87 mm
Bore Style	Minimum Bore
Pitch Root Diameter	158.1 mm
Weight	16.13 LB
EAN or UPC	697950401485