Within the Rolling Elements & Wheels subcategory of Power Transmission, Balls refer to the spherical components used primarily in ball bearings. These precision elements are crucial for reducing rotational friction and supporting both radial and axial loads in machinery. Balls facilitate smooth, efficient movement between bearing races, enhancing the operational performance and longevity of various mechanical systems. They are made from durable materials like steel, ceramic, or glass, depending on the application requirements, and are essential in a wide range of industrial, automotive, and aerospace equipment.