12A18

Metric Roller Chain Sprocket

Item #100966350

14.02 mm Minimum Bore

90.5 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

No. of Strands Across	1
Bore Range [Max]	90.5 mm
Material	Steel
Single Strand Tooth Thickness	11.1 mm
Hub Projection	N/A
Chain No.	12B, 12B-1
Caliper Diameter	97.64 mm
Bore Type	Reborable
Series	A
Root Diameter	97.6 mm
Pitch Diameter [Min]	109.7 mm
No. of Teeth	18
Outside Dia. [Min]	121.45 mm
Pitch Diameter	109.7 mm
Pitch Root Diameter	97.6 mm
Bore Style	Minimum Bore
Sprocket Style	A
Length Through Bore	11.1 mm
Outside Dia.	121.45 mm
Hardened Teeth	Without Hardened Teeth
Width Across Teeth	11.1 mm
Martin No.	12A18
Pin Diameter	12.065 mm
Hub Dia.	N/A
Chain Pitch	19.05 mm
Bore Range [Min]	14.02 mm
Inch/Metric	Metric
Family Name	No. 12 - 19.050 mm Pitch - Single - A
Hub Length Thru	N/A
Weight	1.91 LB
EAN or UPC	697950400440