Bearings are essential mechanical components designed to reduce friction between moving parts, facilitating smooth motion in various applications. They support loads and enable rotational or linear movement, making them critical in machinery, vehicles, and equipment. There are several types of bearings, including ball bearings, which use spherical balls to minimize friction; roller bearings, which utilize cylindrical rollers for increased load capacity; and plain bearings, which consist of a simple sliding surface. Bearings are made from materials such as steel, ceramic, or plastic, depending on the application requirements. Commonly used in automotive, aerospace, industrial machinery, and consumer products, bearings enhance performance, improve energy efficiency, and prolong the lifespan of equipment by ensuring reliable and smooth operation.