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

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