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epicyclic train

noun

, Machinery.
  1. a train of gears or pulleys in which one or more of the axes revolve about a central axis.


epicyclic train

noun

  1. a cluster of gears consisting of a central gearwheel with external teeth (the sun), a coaxial gearwheel of greater diameter with internal teeth (the annulus), and one or more planetary gears engaging with both of them to provide a large gear ratio in a compact space
“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 History and Origins

Origin of epicyclic train1

First recorded in 1885–90
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Example Sentences

All the variable speed gears at present made consist of toothed wheel mechanism either at the hub or crank-bracket, and nearly all are based on the same epicyclic train of toothed wheels.

In both classes, the action involves the use of some sort of epicyclic train, since the motions to be explained are both orbital and axial.

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