Abstract
This chapter highlights bearing, which is a machine element that supports a part, such as a shaft, that rotates, slides, or oscillates in or on it. There are two broad classifications of bearings—plain and rolling element. Plain bearings are based on sliding motion made possible through the use of a lubricant. Antifriction bearings are based on rolling motion, which is made possible by balls or other types of rollers. In modern rotor systems operating at relatively high speeds and loads, the proper selection and design of the bearings and bearing-support structure are key factors affecting system life. Some typical causes of premature failure include excessive operating temperatures, foreign material in the lubricant supply, corrosion, material fatigue, and use of unsuitable lubricants.
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