ball bearing


noun Machinery.

a bearing consisting of a number of hard balls running in grooves in the surfaces of two concentric rings, one of which is mounted on a rotating or oscillating shaft or the like.
any of the balls so used.

Origin of ball bearing

First recorded in 1880–85

OTHER WORDS FROM ball bearing

ball-bear·ing, adjective

Example sentences from the Web for ball bearing

British Dictionary definitions for ball bearing

ball bearing

noun

a bearing consisting of a number of hard steel balls rolling between a metal sleeve fitted over the rotating shaft and an outer sleeve held in the bearing housing, so reducing friction between moving parts while providing support for the shaft
a metal ball, esp one used in such a bearing

Scientific definitions for ball bearing

ball bearing

A ring-shaped track containing hard metal balls that roll freely, used to reduce friction where a rotating element (such as an axle) is attached to a fixed point.
A hard ball used in such a track.