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[man-druh l] /ˈmæn drəl/
noun, Machinery
a shaft or bar the end of which is inserted into a workpiece to hold it during machining.
a spindle on which a circular saw or grinding wheel rotates.
the driving spindle in the headstock of a lathe.
Also, mandril.
1510-20; perhaps akin to French mandrin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for mandrel
  • The pieces are held in the flame using a thin metal wire called a mandrel, which is carefully removed as the pieces cool.
  • Surface maps based on metrology techniques determine the rate the aperture mask moves across the mandrel face.
  • Each capsule is made by depositing beryllium on a smooth, perfectly spherical plastic mandrel.
  • The mandrel shall be pulled through the pipe by hand to ensure that maximum allowable deflections have not been exceeded.
  • The heat melts the powder causing the fibers to stick together enough for the preform to be removed whole from the mandrel.
  • If driven with a mandrel, shell casings may be thinner.
  • The material is attached to a mandrel by heating an edge with a handheld heating iron while it is touching the mandrel.
British Dictionary definitions for mandrel


a spindle on which a workpiece is supported during machining operations
a shaft or arbor on which a machining tool is mounted
the driving spindle in the headstock of a lathe
(Brit) a miner's pick
Word Origin
C16: perhaps related to French mandrin lathe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for mandrel

"miner's pick," 1510s, of unknown origin; perhaps borrowed from French mandrin, itself of unknown origin. Also applied from 17c. to parts of a lathe or a circular saw.

Online Etymology Dictionary, © 2010 Douglas Harper
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mandrel in Medicine

mandrel man·drel or man·dril (mān'drəl)

  1. A shaft on which a working tool is mounted, as in a dental drill.

  2. See mandrin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for mandrel

cylinder, usually steel, used to support a partly machined workpiece while it is being finished, or as a core around which parts may be bent or other material forged or molded. As a support during machining, the mandrel is usually slightly tapered so that when firmly pressed into a previously machined hole, a strong frictional grip between the mandrel and the wall of the hole is effected. The mandrel is mounted on fixed centres that fit in tapered holes in the ends of the mandrel, and it is rotated by an attachment driven either continuously from a power source when cylindrical surfaces are being cut on the workpiece or intermittently by hand when longitudinal grooves are being cut. To accommodate a larger range of hole sizes, a hollow expanding mandrel, having longitudinal slots and capable of expansion by a tapered plug, can be used.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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