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back gear

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noun
  1. (in a lathe) one of several gears for driving the headstock at various speeds.
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Related formsback·geared, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for back gear

Historical Examples

  • Referring again to Fig. 494, g′ is the pinion to drive the back gear while g receives motion from the back-gear pinion.

    Modern Machine-Shop Practice, Volumes I and II

    Joshua Rose