Bearings are mechanical components designed to reduce friction and enable smooth movement between two parts in machinery or equipment. They support axial and radial loads, allowing rotational or linear motion while minimizing wear and heat generation. Bearings come in various types, including ball bearings, roller bearings, and plain bearings, each suited for specific applications and load conditions. They are essential in a wide range of industries, from automotive and aerospace to manufacturing and energy, contributing to the efficiency, durability, and reliability of machinery by facilitating controlled movement and reducing friction-related wear and tear.