08A21

Metric Roller Chain Sprocket

Item #100966143

12 mm Minimum 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

Martin No.	08A21
No. of Strands Across	1
Hub Length Thru	N/A
Bore Type	Reborable
Material	Steel
Bore Range [Max]	N/A
Family Name	No. 08 - 12.700 mm Pitch - Single - A
Hub Dia.	N/A
Pitch Diameter [Min]	85.2 mm
Inch/Metric	Metric
Chain Pitch	12.7 mm
Root Diameter	76.7 mm
Hardened Teeth	Without Hardened Teeth
Single Strand Tooth Thickness	7.37 mm
Bore Range [Min]	12 mm
Pitch Root Diameter	76.7 mm
Width Across Teeth	5.31 mm
No. of Teeth	21
Caliper Diameter	10.01 mm
Bore Style	Minimum Bore
Length Through Bore	5.31 mm
Sprocket Style	A
Chain No.	08B, 08B-1
Outside Dia. [Min]	92.58 mm
Series	A
Hub Projection	N/A
Pin Diameter	8.509 mm
Outside Dia.	92.58 mm
Pitch Diameter	85.2 mm
Weight	0.57 LB
EAN or UPC	697950397016