- 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.
Origin of roller bearing
First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for roller bearing
And I didn't know a roller-bearing from three-point suspension!Free Air
- a bearing in which a shaft runs on a number of hardened-steel rollers held within a cage