The bearing is a component that fixes and reduces the friction coefficient of the load during the mechanical transmission process. When other parts move relative to each other on the shaft, it is used to reduce the friction coefficient during power transmission and keep the shaft center position fixed.
Bearings are an important part of contemporary machinery and equipment. Its main function is to support the mechanical rotating body to reduce the friction coefficient of the mechanical load during the transmission of the equipment.

Bearings have high-precision technology
China is one of the earliest countries in the world to invent rolling bearings. There are long records about the structure of axle bearings in Chinese ancient books. Bearings are important basic parts of various mechanical equipment. Its accuracy, performance, life and reliability play a decisive role in the accuracy, performance, life and reliability of the host. Among mechanical products, bearings are high-precision products, which not only require comprehensive support from many disciplines such as mathematics and physics, but also require material science, heat treatment technology, precision machining and measurement technology, numerical control technology, effective numerical methods and powerful computers Technology and many other disciplines serve it, so the bearing is a product that represents the country's scientific and technological strength.

Current situation of bearings in China
The development momentum of China's bearing manufacturing industry is strong, which will bring positive effects to the steady improvement of the bearing steel market. The demand for a number of high-end bearings has increased significantly, such as aerospace bearings, high-speed precision bearings for machine tool spindles, precision angular contact ball bearings for ball screw support, high-speed electric spindle bearings, precision bearings for machine tools in the photovoltaic industry, turntable bearings, wind turbine bearings, Joint bearings for shield machines, rolling mill bearings, high-speed rail bearings, automotive bearings, pulley bearings for cranes, turbocharger bearings, hydrodynamic bearings, etc.
At present, China's bearing industry has already possessed a relatively large economic scale. There are more than 1,400 bearing companies in the country with more than 300,000 employees. In 2011, China's bearing manufacturing industry achieved a total industrial output value of 193.211 billion yuan, a year-on-year increase of 27.59%; sales revenue was 191.997 billion yuan, a year-on-year increase of 30.30%; total profits were 12.523 billion yuan, a year-on-year increase of 26.54%.

Prospects of the bearing market
At present, basic machinery manufacturing such as precision bearings has become a key industry during the country’s "13th Five-Year Plan" period, striving to make it reach or close to the international advanced level. It is estimated that with the support of the policy, the sales of the high-end bearing casting industry will reach about 222 billion yuan. China's bearing output is expected to exceed 22 billion sets, and total sales are expected to exceed 350 billion yuan, making it the world's largest bearing production and sales base.