Crank shaft


[krangk-shaft, -shahft]
noun Machinery.
a shaft having one or more cranks, usually formed as integral parts.

1850–55; crank1 + shaft Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
crankshaft (ˈkræŋkˌʃɑːft)
a shaft having one or more cranks, esp the main shaft of an internal-combustion engine to which the connecting rods are attached

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1854, from crank + shaft. The basic form of the mechanism appears to date from Roman times.
Online Etymology Dictionary, © 2010 Douglas Harper
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