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The gap between domestic bearings and imported bearings

by:JNSN     2021-11-06

Guide: In recent years, the development of my country's bearings has continued to progress, and industrialization has gradually formed. At present, the world's bearing market is about 10% in my country, and its sales volume occupies the third place in the world. However, compared with the world's strong bearing industry, my country's bearings still have a certain gap. The main performance is that the proportion of high-tech, high-precision, and high-value-added products is low, and the stability of the products needs to be further improved and improved.

   In recent years, the development of bearings in my country has continued to progress, and industrialization has gradually formed. At present, about 10% of the world's bearing market is in my country, and its sales volume occupies the third place in the world. However, compared with the world's strong bearing industry, my country's bearings still have a certain gap. The main performance is that the proportion of high-tech, high-precision, and high-value-added products is low, and the stability of the products needs to be further improved and improved. Today, let us take a look at the difference between domestic bearings and imported bearings!

    1. Bearing accuracy: Although the dimensional deviation and rotation accuracy of domestic bearings are very close to imported bearings. However, there is still a certain gap in dispersion with SKF imported bearings. Foreign countries have already begun to study and apply such fine rotation accuracy indicators as 'non-repeatable beating  

  2. In terms of vibration, noise and abnormal sound, Japan has introduced silent and ultra-quiet bearings. Compared with Japanese bearings, the vibration extreme level of Chinese bearings generally differs by more than 10dB.

  3. In terms of life and reliability, taking deep groove ball bearings as an example, the life of foreign famous brand products is generally more than 8 times the calculated life (up to 30 times or more), and the reliability is 98% The above (or the pursuit of life with the main engine), and the life of Chinese bearings is generally only 3 to 5 times the calculated life, and the reliability is about 96%.  

   4. In terms of high-speed performance, the DmN value of foreign brand-name products is 4 times 106 mm r/min, while Chinese bearings are only 2 times 106 mm r/min.  

   Although domestic bearings have a lot of gaps with imported bearings, after the Chinese people continue to develop more high-quality bearing products, many excellent bearing companies will also be born.

     In December 2013, 'Jade Rabbit' successfully landed on the moon. This has been the dream of China for many years, and it bears the hard work of many Chinese people. While we are feeling and excited, we must not forget the scientific researchers and enterprises that silently contribute to the development of national science and technology. Maybe everyone does not know that the successful development and operation of this 'Yutu' relies on our domestic Luoyang. Bearings do not rely on imported bearings, which is of great significance. This means that the gap between domestic bearings and imported bearings is getting smaller and smaller, and domestic technologies are getting closer and closer to the high international standards, and they are even in a leading position in certain technologies. For some ordinary machinery, the requirements for the bearing level may not be high, but the requirements for the 'Jade Rabbit' to jump around on the moon are very high. It is really a big test for domestic bearings, but it is gratifying that domestic bearings are fully competent and accomplished very well. Although domestic bearings have only developed for a few decades, they do not have much advantage compared to hundreds of years of foreign history, but they can catch up in such a short time. We can only use one idiom to summarize, that is, the waves behind the Yangtze River push the waves forward. .

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