What is the primary function of a bearing?

The primary function of a bearing is to allow smooth, low-friction motion between two surfaces. Bearings are designed to reduce friction between moving parts, which facilitates smooth operation in machinery and mechanical systems. They achieve this by providing a controlled surface for rotation or linear movement, ensuring that the load is properly distributed over the moving components. This is crucial in various applications, from small motors to large industrial machines, where efficient operation and reduced wear are essential for longevity and performance.

While providing structural support is a secondary function (as seen in some designs), the main purpose focuses on the motion aspect. Increasing the rotational speed of a motor or reducing noise during operation may be benefits of having well-functioning bearings, but they do not define the primary role of bearings themselves. Thus, the emphasis is on their ability to minimize friction and provide a smooth interface for movement.