man·​drel ˈman-drəl How to pronounce mandrel (audio)
variants or less commonly mandril
: a usually tapered or cylindrical axle, spindle, or arbor inserted into a hole in a piece of work to support it during machining
: a metal bar that serves as a core around which material (such as metal) may be cast, molded, forged, bent, or otherwise shaped
: the shaft and bearings on which a tool (such as a circular saw) is mounted

Examples of mandrel in a Sentence

Recent Examples on the Web The resin infuses the strands before they are applied to the mandrel. Joe Pappalardo, Popular Mechanics, 4 Apr. 2018 This appears to be a mandrel, or mold, around which carbon fiber is wound for the main body of the spaceship, or BFS. Eric Berger, Ars Technica, 9 Apr. 2018

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'mandrel.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Medieval Latin maundrellus, probably ultimately from Old Occitan mandre kingpin

First Known Use

1554, in the meaning defined at sense 1a

Time Traveler
The first known use of mandrel was in 1554

Dictionary Entries Near mandrel

Cite this Entry

“Mandrel.” Dictionary, Merriam-Webster, Accessed 25 Sep. 2023.

Medical Definition


variants also mandril
: the shaft and bearings on which a tool (as a dental grinding disk) is mounted

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