What is the development of bearings in China?

Bearing is very common in our life, but there are many bearings that cannot be produced in our country at present. Some high-precision bearings with good performance are basically imported from other countries. I would like to introduce why they are imported from other countries.
1. Low production concentration in China's bearing industry
The world's eight largest multinational corporations account for 75 to 80 percent of the world's roughly $40 billion in sales of bearings. Germany's two big companies account for 90% of its total, Japan's five make up 90%, and America's one makes up 56%. However, the annual sales volume of 7 bearing enterprises, such as China's tile shaft, which have an annual sales volume of more than 1 billion yuan, only accounts for 28.3% of the whole industry. (non-latest data)
2. Low r&d and innovation capacity of China's bearing industry
As most enterprises are still at a low level in the construction and operation of the innovation system, investment in research and development and innovation, talent development and other aspects, and the research institutes that are oriented to industrial services are becoming more entrepreneurial, the country has no investment in the research of industry generic technology, thus weakening the function of research and development for the industry. Therefore, the industry is prominent in "two weak and two small", that is, weak in basic theoretical research, weak in international standard formulation, less original technology and less patented products.
At the moment, our design and manufacturing techniques are mostly analog, with decades of integration. The low ability of product development is reflected in: although the matching rate of domestic main engine is up to 80%, the supporting and maintenance bearing of important main engine such as high-speed railway passenger car, middle and high grade passenger car, computer, air conditioner, high level rolling mill, etc., basically depends on import.
3. Low manufacturing technology level in China's bearing industry
The development of bearing manufacturing technology and technology equipment technology in China is slow. Most enterprises, especially the old state-owned enterprises, are still traditional equipment. Advanced heat treatment technology and equipment, which are essential to the life and reliability of bearing, have low coverage, such as controlled atmosphere protection heating, double refining and bainite quenching.
The research and development of new type of bearing steel, the improvement of steel quality, lubrication, cooling, cleaning and abrasive abrasive tools and other related technologies 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 processing dimension discretization of the product is large, and the inherent quality of the product is unstable, which affects the accuracy, performance, life and reliability of the bearing.
In recent years, the development of bearings in China has been progressing continuously and industrialization has been gradually formed. At present, about 10% of the world bearing market in China occupies the third place in the world in terms of sales volume. However, there is still a gap between China and the world bearing industry. The main performance is high technology, high precision, high added value of the low proportion of products, product stability needs further improvement and improvement.