Why bearing is important

This is a preview of subscription content, log in to check access. Schaeffler Technologies AG ed. Corporate publication in German and English Google Scholar. Wahler M Schmierung bestimmt die lebensdauer [Lubrication determines the fatigue life]. Weck M, Brecher C Werkzeugmaschinen — konstruktion und berechnung, 8th edn. Christian Brecher 1 Email author 1. First, an overview is needed. Rolling element bearings are used to reduce friction in rotating machinery by removing as much sliding friction as possible from a system by using rolling friction instead which has a lower coefficient of friction.

However, even though rolling element bearings are attempting to reduce the total friction in a system, the individual rolling elements within the bearing still require a certain amount of friction to roll rather than slide. This internal friction is created by applying load to the bearing. This load can either be generated internally with a preload, or it can be generated by an externally applied load.

As the shaft rotates, the rolling elements pass into and out of the outer ring load zone. When the rolling elements pass in and out of the loaded zone, a change in the speed of the rolling element can take place. Without a minimum load on the rolling elements, the accelerations in and out of the load zone can be very detrimental. Why are they important for bearings? Phaneuf goes on to say that if minimum loads are not met for a rolling element bearing, then several conditions could result which can drastically reduce the service life of the bearing.

Skidding, which is sliding between the rolling elements and the raceways, can disrupt the lubricant film and lead to smearing damage. Smearing not only damages the rolling surfaces, but it also causes a temperature increase. Additionally, it is vital to the development of machine technology that we continue going forward to develop bearings that can work under ever harsher and more specialized conditions. Bearings will no doubt continue to evolve and change, and to improve our livelihoods by "making the world go round".

Part 1: What Are Bearings? Let's learn about the basic functions of bearings! The amazing history of bearings Part 3: What's the Structure of the Bearing? Bearing Trivia for Beginners: "Fits".

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June 13, So just what are bearings? The role of bearings: So why are they so important? So, just what kind of role do bearings play in allowing machines to operate smoothly? They fulfill the following two major functions.