ballrace

English

Etymology

From ball +‎ race.

Noun

ballrace (plural ballraces)

  1. (mechanical engineering) A ring with a groove in which rolling elements (such as balls) ride, forming part of a rolling-element bearing (for example, a ball bearing).
    Synonym: race
    • 1971, Gwen White, Antique Toys And Their Background, page 128:
      Home-made scooters could be special affairs made in carpenters' shops, or they could be made by boys with two rough-hewn pieces of wood put together with ball-races for the wheels.

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