Today, the situation in Russia and Ukraine is in dire straits. Foreign oil prices and gold prices have skyrocketed. All walks of life are also more or less affected by the international situation. The bearing industry is also among them. Foreign bearing manufacturers are more or less affected by the war. Influenced by the situation, what is the status quo of domestic bearing manufacturers? The price of imported bearings has always been higher than that of domestic bearings. You can buy two domestic bearings for the price of imported bearings. Now that the foreign situation is turbulent, the price of foreign bearings is higher than that of domestic bearing manufacturers. Although we have to admit that the quality of imported bearings is indeed better than that of domestic bearings, the high prices have brought pressure to many industries. So where is the gap between domestic bearings and imported bearings? From the perspective of bearing accuracy, the dimensional deviation and rotation accuracy of domestic bearing manufacturers are very close to imported bearings, which is also the great progress my country's bearing industry has made in recent years. However, compared with the leader in bearing technology and manufacturing industry - SKF has shown differences in domestic bearings, and there is still a certain gap in the degree of dispersion between domestic bearings and top bearings. At the same time, some domestic bearing manufacturers do not pay much attention to the research on bearing accuracy standards, which is one of the main reasons why the accuracy of bearings made in China is not as good as imported bearings. In order to reduce deviation and improve accuracy, foreign researchers have begun to apply fine rotation indicators such as non-repeatable beating. In contrast, in recent years, Chinese scholars have realized the importance of precision for bearings and machines, and thus started this research work. The lower precision than imported bearings does not mean that domestic bearings are eliminated. In most applications, domestic bearings can replace the functions of imported bearings, but they cannot be used for some professional equipment that requires very high precision. Let's talk about vibration noise and abnormal noise. In this regard, Japan is the best in the world. They have launched ultra-quiet bearings, and the extreme vibration level of Chinese bearings is more than 10dB different from that of Japan. How to understand 10dB? In our opinion, 10dB is a near-quiet environment. The dB is very small, even negligible, but this 10dB is still an insurmountable hurdle for researchers. In order to put it into use, the most important thing for an enterprise or factory is its life and reliability data. By sorting out the data, we can get that the service life of imported bearings is generally more than 8 times, or even more than 30 times, the calculated life, and the reliability is as high as 98%; the service life of domestic bearings is only 3-5 times the calculated life, and the reliability is only 96%. %. Obviously, we can see that the service life of domestic bearings is shorter than that of imported bearings, the reliability is low, and the cost performance is greatly reduced. This means that domestic bearing manufacturers will lose part of their passenger flow. The low reliability of domestic bearings is closely related to the desire of some domestic bearing manufacturers to succeed and ignore product inspection. In addition to the above aspects, in terms of high-speed performance, some domestic bearings can only reach about half of the speed of imported bearings. The expansion of this gap makes the efficiency of the machine less than expected, which affects the income, forcing many enterprises to choose imported bearings for factory transfer. The difference in bearings depends not only on technical differences, but also on many factors. From the raw materials, heat treatment process, processing equipment and technology to the level and ability of on-site management and organizational management, there is a big gap between domestic bearing manufacturers and foreign countries. The most important thing is that the quality awareness of some domestic bearing manufacturers is not in place, the control of material composition is not strict enough, and the requirements for material purity are not strict enough. However, China has realized that these problems are constantly improving, and domestic bearings are also constantly shortening the distance from imported bearings. Although imported bearings have advantages, they are expensive; although domestic bearings are not as good as imported bearings in terms of quality and performance, with the steady improvement of my country's scientific research strength, our domestic bearing manufacturers are also developing rapidly. What we lack is not technology or resources, but spirit—the craftsman spirit of a big country. As an old brand of domestic bearing manufacturers for 37 years, it has always adhered to the concept of 'creating sincerity, establishing trust, and establishing words'. It has never been sloppy in terms of speed, precision, and quality control. The quality of each batch of bearings is checked, with high quality, high standards and high requirements, and is committed to making the domestic bearing brand a first-class brand. Only when the torque is accurate can the rotation be stable!
HangZhou Jnsn Bearing Imp& Exp Co., Ltd is trying to institute social good changes this relationship because it averts a firm's resources from its core task of increasing profits.
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