Difference between Bearing and Bearing Unit

‌The main difference between bearings and bearing units is structure and function. A bearing is a part that supports a mechanical rotating body, and its main function is to reduce friction and ensure rotation accuracy; while a bearing unit is a combination of bearings and other components, which is usually used in more complex mechanical systems.

A bearing is a basic mechanical part that is mainly used to support a rotating body and reduce friction during movement. It consists of an inner ring, an outer ring, rolling elements (such as balls or rollers) and a cage. The design of the bearing enables it to withstand radial and axial loads and is widely used in various mechanical equipment.

A bearing unit is a more complex component that usually includes bearings, seals, lubrication systems and possible other mechanical components. It combines multiple components to form a whole, which is easy to install and maintain. The design of the bearing unit is to improve the reliability and efficiency of the system and reduce maintenance. For example, the wheel hub bearing unit is a combination of two sets of bearings, which has the advantages of good assembly performance, light weight and compact structure, and has been widely used in cars.‌