Woodruff key

Woodruff key

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.

This type of key was developed by W.N Woodruff of Connecticut, who was presented in 1888 with the John Scott Medal by the Franklin Institute for the invention.cite web | last = Garfield| first = Eugene| authorlink = Eugene Garfield| coauthors = | year = 2007 | url = http://www.garfield.library.upenn.edu/johnscottaward/js1881-1890.html| title = The John Scott Award Recipients from 1826 - present | format = | work = | publisher = | accessdate = 2007-08-23]

ee also

* Keyway
* Rotating spline
* Set screw

References

External links

* [http://www.google.co.uk/books?id=G95OZImrmZQC&pg=PT210&dq=%22woodruff+key%22&as_brr=1&sig=xJBVazM1guxlYEpBXDop6Elsxd8 Illustration of a typical automotive woodruff key application] mating a gear to a camshaft.


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Look at other dictionaries:

  • woodruff key — noun Usage: usually capitalized W Etymology: probably from the name Woodruff : a shaft key made in the form of a segment of a disk and used with shafts not more than 2 1/2 inches in diameter …   Useful english dictionary

  • Woodruff key — /ˈwʊdrʌf ki/ (say woodruf kee) noun a securing device consisting of a metal semicircle, most of which fits into a slot made crosswise in a metal shaft, the raised remainder fitting into a slot inside the central hole of a wheel, pulley, etc.,… …  

  • Woodruff key — Mach. a key having the form of a nearly semicircular disk fitting into a recess in a shaft. [appar. after the proper name] * * * …   Universalium

  • Woodruff key — a half moon shaped piece of metal used to secure something to a shaft which has a notch cut in the shaft to accommodate the key …   Dictionary of automotive terms

  • Woodruff key — Сегментная шпонка …   Краткий толковый словарь по полиграфии

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  • key — [1] A parallel sided piece inserted into a groove cut part way into each of two parts, which prevents slippage between the two parts and they rotate together. Used to secure gears, pulleys, cranks, handles, etc. [2] A metal instrument for turning …   Dictionary of automotive terms

  • half-moon key — A driving key serving the same purpose as the regular key but it is shaped somewhat like a half circle. Also called a woodruff key …   Dictionary of automotive terms

  • Roscoe B. Woodruff — Infobox Military Person name=Roscoe Barnett Woodruff born= birth date|1891|02|09 died= Death date and age|1975|04|24|1891|02|09 caption=General Roscoe Barnett Woodruff at Fort Jackson, South Carolina, 1942. U.S. Army Signal Corps photo. nickname …   Wikipedia

  • Ernest Woodruff — (May 23, 1863 June 5, 1944) [ [http://www.geocities.com/heartland/forest/3255/pafg20.htm#23951 Decendants of John Barton] ;retrieved February 2007] was an important businessman in the U.S. city of Atlanta.With his brother in law, Joel Hurt he… …   Wikipedia

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