What is the Purpose of Bearings? Bearings are the basic component with great importance and can be found in all most every machine. Their sole purpose is prevention of direct contact between 2 parts of the machine that are in relative motion. Thereby preventing friction, heat generation hence preventing the wear and tear of parts. Energy consumption is also reduced as sliding motion is in turn replaced with low friction rolling. They also play an important role to transmit the load which may be radial, axial, or a combination of both. Depending on the application it can also restrict freedom of movement of different parts. Principle of Rolling Bearings : - Rolling elements are in the form of balls or cylinders. We know that it’s easier to roll a wheel than slide it on the surface because the magnitude of rolling friction is less than friction . The same principle is in work here. Rolling element bearings make it possible to have free movement of parts in ro...