Bearings are components that prevent direct contact between two metals in relative motion to avoid friction, heat generation, and wear & tear. Since there is no sliding motion, the bearing reduces the energy consumption of moving parts through low friction rolling. In addition, bearings help transmit radial loads, axial loads, or both types of rotating element loads to the housing. Bearings are available in various sizes & shapes, and the choice between types depends on the application and type of loads, namely radial, axial, or a combination of both. Let us discuss each bearing and its subtypes in detail.