roller bearing

roller bearing


Definition of ROLLER BEARING

:  a bearing in which the journal rotates in peripheral contact with a number of rollers usually contained in a cage

Illustration of ROLLER BEARING

First Known Use of ROLLER BEARING


roller bearing

noun    (Concise Encyclopedia)

One of the two types of rolling, or antifriction, bearings, the other being the ball bearing. Like a ball bearing, a roller bearing has two grooved tracks, but the balls are replaced by rollers. The rollers may be cylinders or shortened cones. If the rollers are cylindrical, only radial loads (perpendicular to the axis of rotation) can be carried, but with conical rollers both radial and thrust, or axial, loads (parallel to the axis of rotation) can be carried. In a given space, a roller bearing can carry a greater radial load than a ball bearing can.


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