Introduction to Rolling Bearings

Rolling bearings are a sophisticated mechanical element that converts sliding friction between the running shaft and the shaft holder into rolling friction, thereby reducing friction loss. Rolling bearings are generally composed of four parts: inner ring, outer ring, rolling body and cage, the role of the inner ring is to match the shaft and rotate with the shaft, the outer ring function is to match the bearing, play a supporting role, the rolling body is to use the cage uniformly distributed between the inner ring and the outer ring, its shape size and number directly affect the rolling bearing performance and life;

Rolling bearing is an important support for shafts and other rotating components, and is one of the first mechanical foundation parts to adopt specialized mass production. As early as the beginning of the 20th century, western countries have appeared a relatively complete bearing industry system, in order to continuously improve the performance and life of rolling bearings, reduce product costs, increase varieties, expand its scope of application and theoretical research, calculation methods and so on provide a good environment. At present, the selection of rolling bearings is relatively perfect calculation method, a wide range of products, complete specifications, work performance, accuracy, life, reliability and so on can meet the needs of various fields and cutting-edge technology.

Rolling bearings are usually made up of an inner ring, an outer ring and a set of rolling bodies (balls or rollers) and a cage that uses a rolling body between the ring raceways to determine the interval. Standard materials for internal, outer and rolling bodies are high carbon chromium bearing steel or carburizing steel. The steel should be treated as heat according to the appropriate hardness that can be obtained to optimize the resistance to rolling contact fatigue. Bearing surfaces are ground to a high precision with a special machine tool.