According to the data from the National Bureau of Statistics, in 2011, there were 1,416 enterprises in China's bearing manufacturing industry (annual sales revenue of more than 20 million yuan), with a total industrial output value of 193.211 billion yuan, a year-on-year increase of 27.59%; sales revenue was 191.097 billion yuan, A year-on-year increase of 30.30%; the total profit was 12.523 billion yuan, an increase of 26.54% over the previous year. It is estimated that by 2015, my country's bearing output is expected to exceed 28 billion sets, and the main business income is expected to reach 210 billion yuan, becoming the world's largest bearing production and sales base.

At present, my country's bearing industry is mainly faced with three prominent problems: low concentration of industry production, low R&D and innovation capabilities, and low level of manufacturing technology.

First, the industry's production concentration is low. In the world's bearing sales of about 30 billion US dollars, the world's eight major multinational companies account for 75% to 80%. Two German companies account for 90% of the national total, five Japanese companies account for 90% of the national total, and one US company accounts for 56% of the national total. The sales of the 10 largest bearing companies in my country, including ZWZ, only account for 24.7% of the industry, and the production concentration of the top 30 companies is only 37.4%.

Second, the R&D and innovation capabilities are low. The basic theoretical research of the whole industry is weak, the participation in the formulation of international standards is weak, and there are few original technologies and few patented products.

At present, our design and manufacturing technology is basically imitation, and our product development ability is low. The supporting and maintenance bearings of the main engine are basically imported.

Third, the level of manufacturing technology is low. The development of manufacturing technology and process equipment technology in my country's bearing industry is slow, the numerical control rate of turning is low, and the level of automation in grinding is low. There are only more than 200 automatic production lines in the country. Advanced heat treatment processes and equipment that are critical to bearing life and reliability, such as controlled atmosphere protection heating, double refinement, bainite quenching, etc., have low coverage, and many technical problems have failed to make breakthroughs. The research and development of new steel grades of bearing steel, the improvement of steel quality, and the research and development of related technologies such as lubrication, cooling, cleaning and abrasive tools cannot meet the requirements of improving the level and quality of bearing products. As a result, the process capability index is low, the consistency is poor, the dispersion of product processing dimensions is large, and the inherent quality of the product is unstable, which affects the accuracy, performance, life and reliability of the bearing.