jackshaft

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English

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English Wikipedia has an article on:
Wikipedia
 Jackshaft (locomotive) on Wikipedia

Etymology

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From jack +‎ shaft.

Noun

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jackshaft (plural jackshafts)

  1. A common mechanical component used to transfer or synchronize rotational force in a machine.
    Synonym: countershaft
  2. A wheelless axle used to turn the wheels of a locomotive.
    • 1950 October, “S.R. Diesel-Mechanical Shunter”, in Railway Magazine, page 692:
      Final drive is by reduction gears on the jackshaft, and through flycranks and rods to the wheels.

Translations

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Verb

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jackshaft (third-person singular simple present jackshafts, present participle jackshafting, simple past and past participle jackshafted)

  1. To transfer or synchronize rotational force by means of a jackshaft.
    Synonym: countershaft