Correct and efficient lubrication is essential for the satisfactory function of rolling element bearings and to attain maximum service life. It is therefore advisable for both design engineers and maintenance technicians to thoroughly understand the basics of tribology and its effects on the proper function of rolling element bearings. Roland Gruber of bearing specialist NKE Austria explains the issues. Each rolling element bearing represents a 'tribological system' consisting of the bearing and an adequate lubricant. In this system - namely, in a rolling element bearing - the lubricant primarily separates the metallic surfaces and thereby reduces friction, as well as preserving the steel parts and preventing or neutralizing the effects of contamination.
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