The most popular precision machine tool bearings i

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China's precision machine tool bearings have entered a period of rapid development. Statistics show that in 2002, China's bearing industry produced 2.8 billion sets of S-N fatigue life curves and fatigue limits, including 62.364 million sets of P5 precision bearings and 729000 sets of P4 ultra precision bearings. In the annual sales of bearings, 33million sets were used in the machine tool manufacturing industry

by analyzing the market distribution of domestic precision machine tool bearings in 2002, about 1.5 million sets of P5 and above bearings are used in various precision machine tools, about half of which are used for machine tool spindles and ball screw bearings. About 150000 sets of P4 and above ultra precision bearings and matched bearings (mainly spindle bearings and ball screw bearings)

according to the objectives of the Tenth Five Year Plan of the machine tool industry, by 2005, the annual output of metal processing machine tools will reach 200000-220000, of which the number of CNC machine tools will increase to 30000-35000 (in 2003, the production and sales of CNC machine tools have exceeded 30000), accounting for 15% of the total output, and the market share of domestic machine tools will reach 60-65%. Due to the rapid development of China's machine tool industry in recent years, by 2005, the annual output of metal processing machine tools will certainly exceed the "Tenth Five Year Plan" target of the machine tool industry. In addition, with the development of modern machine tools towards high speed, high efficiency and compounding, the share of precision bearings equipped with precision machine tools will increase significantly. Considering the huge machine tool transformation and maintenance market, through analysis and calculation, it is predicted that in 2005, metal processing machine tools will need more than 50million sets of supporting bearings, and about 3million sets of P5 and above precision bearings, of which about 1.5 million sets are used for machine tool spindles and ball screws. Deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, two-way thrust angular contact ball bearings and tapered roller bearings are widely used in these bearings

as precision control parts of machine tools, spindle bearings and ball screw bearings of machine tools, the proportion of P4 and above ultra precision bearings and matched bearings will increase significantly, from 20% in 2002 to about 40% - 50% in 2005, with a total of about 700000 sets

at present, about half of the demand for about 150000 sets of P4 and above ultra precision angular contact ball bearings in the machine tool industry comes from foreign famous bearing companies such as fag, NSK, SKF, snfa, etc. In addition to psychological factors and brand effects, the technical performance and reliability of bearings are the main reasons for machine tool customers to choose imported bearings. After completing the experiment, print the results, shut down the machine in the reverse order of startup, and cover the computer, industrial control box and printer with cloth to prevent dust and water. For example, 5. The axis bending of the reinforcement at both ends of the joint shall not be greater than 4 degrees. As a result, the technical indicators and reliability level of domestic ultra precision bearings can be equivalent to that of imported bearings, and the market potential in the next two years is huge

to this end, the major domestic machine tool bearing supporting enterprises have begun to accelerate the pace of technological transformation, and have increased capital investment in processing conditions, detection means, matching technology and reliability research. The small batch trial products of major models and the large batch production products of some models with more than 3000 pen making enterprises, more than 200000 employees and an annual output of more than 40 billion ball pens have reached the international advanced level, It is only a matter of time and scale to replace imports

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