What is the structure of the bearing?

The structure of the bearing mainly includes inner the ring, outer ring, rolling elements and cage. Here's a closer look at these parts:
1. Inner ring: The inner ring is an annular part in the bearing, usually made of steel. The inner ring is the part that matches the shaft axially. It is directly placed on the shaft during installation and bears the load and moment from the shaft.
2. Outer ring: The outer ring is also a ring-shaped part, usually made of steel. The outer ring is the part that cooperates with the shell or seat. It bears the load and moment from the outside and also protects the internal parts.
3. Rolling elements: Rolling elements are usually rollers or steel balls. Their function is to perform a rolling motion between the inner ring and the outer ring to bear and transmit loads. The rollers and steel balls reduce friction on the contact surface through rolling motion, thereby reducing energy loss.
4. Cage: The cage is also called a retainer or retaining device and is usually made of metal or plastic. The main function of the cage is to maintain the position and spacing between the rolling elements and keep them evenly distributed.
These parts are assembled together to form a complete bearing unit. The structure of bearings can vary depending on the specific type and purpose, such as ball bearings, roller bearings, etc.