Bearings

Bearings basic:-

Bearings are needed whenever one part of a machine slides against another. Bearings can be classified as providing sliding or rolling contact.

A sliding bearing typically uses a lubricant to reduce friction between the sliding surfaces. A shaft and bushing bearing is known as a journal bearing. The fluid lubricant forms a film between the sliding surfaces so that there is no contact between solid components. This kind of bearings are known as fluid film bearings.

Rolling contact bearings are often referred to anti-friction bearings. Anti-friction bearings, as their name implies, minimize friction by removing any possible sliding between bearing surfaces and replacing all contacts with rolling interfaces.