What is the primary function of a ball bearing?

The primary function of a ball bearing is to support rotational motion. Ball bearings are designed to reduce friction between moving parts, allowing them to rotate smoothly and efficiently. They consist of one or more outer races, inner races, and balls that are typically made from steel or ceramic materials. When a shaft rotates, the balls within the bearing roll between the inner and outer races, minimizing the energy lost to friction and enhancing the performance and longevity of mechanical components.

This function is critical in various applications, such as in electric motors, machinery, and automotive systems, where smooth and reliable rotation is essential for optimal performance. The efficiency gained by using ball bearings helps to prevent wear and tear on other components, making them indispensable in many mechanical systems.