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