Bearings are crucial for reducing friction between moving parts, ensuring smooth and efficient machinery operation. This category includes ball bearings, which use spherical balls to minimize rotational friction, and roller bearings with cylindrical rollers for handling heavy loads. Spherical bearings manage angular misalignment, while thrust bearings handle axial loads. Plain bearings offer simple designs, and housing supports secure bearings in place. Other bearings include specialized designs tailored to unique requirements. Each type is selected based on its ability to support the movement of rotating equipment, ensuring durability and reliability in various industrial applications.