What is the difference between a journal bearing and a rolling-element bearing?

Question

Accepted Answer

Journal bearings use a sliding motion between surfaces, while rolling-element bearings use rolling elements to reduce friction.

Journal bearings have a simpler design with a smooth surface for the shaft to rotate on.
Rolling-element bearings have balls or rollers that roll between inner and outer races to reduce friction and support the load.
Journal bearings are typically used in applications with lower speeds and loads, while rolling-element bearings are used in high-speed and high-load applications.
Examples of journal bearings include bushings and sleeve bearings, while examples of rolling-element bearings include ball bearings and roller bearings.

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