Description
Diameter: 1/4″
Diameter 2: 9/16″
Length: 1-1/4″
Material: Steel
Finish: Zinc
Shape: Woodruff
Nominal Size: #21
Type: Woodruff Key
Box of 4.
A woodruff key or half-moon key, is a semicircular shaped, removable key that fits into a matching keyway cut into a shaft, leaving a protruding tab. The tab mates with a matching slot on a device mounted flush upon the shaft e.g. a pulley, thus preventing the device from freely rotating about the shaft. It is widely used in machine tools and in the automotive industry.
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