roller bearing

Noun

 * 1) A bearing in which the load is carried by round (e.g. cylindrical or spherical) elements (rollers).

Usage notes
By an arbitrary but widely upheld idiomatic convention, precise usage in mechanical industries often holds roller bearing and ball bearing to be coordinate terms under the hypernym of rolling-element bearing, in which case rollers that are spherical are excluded as referents of the word roller and are instead called balls.

Translations

 * Finnish:, rullalaakeri
 * Russian: ро́ликовый подши́пник
 * Swedish: