Rolling bearings (hereinafter referred to as bearings) are generally composed of inner ring, outer ring, rolling elements and cage. The rolling elements roll and support the load on the tracks of the inner and outer rings. The relative position between each other is maintained through the cage. According to the type of rolling elements, it can be divided into ball bearings and roller bearings. According to different materials, manufacturing methods and contact surface forms , There are also other types, such as: stamping bearings and sliding bearings. 

 Above: stamping bearings, which are commonly used in sports equipment, handling carts, roller shoes, inline wheels, bicycles, strollers, doors and windows, drawers, etc.