universal joint

English

Noun

universal joint (plural universal joints)

  1. A coupling that allows different parts of a machine not in line with each other some freedom of movement at the same time as transmitting rotary motion. Typical applications include driveshafts and socket wrenches.
    Synonyms: U-joint, universal coupling, Cardan joint, Hardy-Spicer joint, Hooke's joint
    Coordinate term: constant-velocity joint
    • 1958 April, “British Railways First Main-Line Diesel-Hydraulic Locomotive”, in Railway Magazine, page 265:
      The drive from each hydraulic transmission to the axle-mounted gearboxes on the outer axles of each bogie is through cardan shafts fitted with needle-bearing universal joints.

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