roller bearing

noun

, Machinery.

1. a bearing consisting of cylindrical or tapered rollers running between races in two concentric rings, one of which is mounted on a rotating or oscillating part, as a shaft.

roller bearing

noun

1. a bearing in which a shaft runs on a number of hardened-steel rollers held within a cage

Word History and Origins

Origin of roller bearing¹

First recorded in 1855–60