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The Main Reason For China’s High-end Bearing Defects – Material Defects


Bearings are indispensable parts in mechanical equipment, which play a role in reducing frictional resistance, improving mechanical kinetic energy and maintaining precision. During World War II, Allied bombers bombed a special town in Germany, which greatly promoted the victory in the European and African battlefields. This town is officially the production base of German military bearings.

Nowadays, bearings are used more widely and their performance is changing with each passing day. Japan and Germany have almost monopolized the materials and production processes of high-end bearings.

Because china has not conquered this technology, Japan and Germany sold high-end bearings back to china at ten times the price after purchasing primary materials in china at a low price, squeezing high profits.The requirements are also extreme. For a long time, the bearings of china’s military aviation engines have been embargoed by foreign countries, which is one of the reasons why their performance has been criticized. In addition, the high-end bearings used in high-speed rail and high-end robots are also partially dependent on foreign countries.

Bearing defects can arise from various factors, and material defects are indeed one of the significant contributors. Here’s a breakdown of some of the common causes:

  • Material Quality: The quality of raw materials used in bearing manufacturing is crucial. If the materials are of low quality or not up to the required specifications, it can lead to defects in the finished product. Material defects could include impurities, inclusions, improper heat treatment, or incorrect composition.
  • Heat Treatment: Heat treatment is a critical process in bearing manufacturing, as it affects the material’s hardness and overall performance. If the heat treatment is not done correctly, it can result in uneven hardness, soft spots, or brittleness, leading to bearing failure.
  • Machining and Grinding: Precise machining and grinding are essential to achieve the required dimensions and surface finish. Any errors in these processes can result in surface irregularities, misalignment, or stress concentrations, which may lead to bearing defects.
  • Lubrication and Contamination: Insufficient or improper lubrication can cause increased friction and wear on the bearing surfaces, leading to premature failure. Moreover, contamination by particles or foreign substances can also accelerate bearing wear and damage.
  • Assembly and Handling: Proper assembly procedures and careful handling during the manufacturing process are crucial to avoiding damage to the bearings before they are even put into service.
  • Design Issues: In some cases, bearing defects may also arise from design flaws, such as inadequate load-carrying capacity or incorrect fit.

Bearings are not only an important part of contemporary machinery and equipment, the so-called “mechanical joints”, but also important parts of daily necessities in our lives, such as bicycles, refrigerators and washing machines. Bearings are used in all products. And there are many types of bearings, but no matter what kind of bearings, small vibration, less wear, and low heat are all high-quality standards.

The Gap Between China’s High-End Bearings And Foreign Products

However, China still relies on Germany and Japan to import high-end bearings. Germany and Japan basically import raw materials from China for high-end processing, and then buy them back to China at ten times the price. This is an open fact. But China’s manufacturing industry is helpless. China is undoubtedly a real big manufacturing country in bearings, but it does not meet the standard in terms of precision. Although the reliability of Chinese bearings has reached about 96%, compared with foreign bearings, the reliability has reached more than 98%, and the actual life can be calculated as long as possible. 30 times, but still lags behind.

The Causes Of Defects In High-End Bearings In China

With the support of the state, the independence rate of aircraft bearings will also reach 90% by 2030. China’s technology for manufacturing raw materials for high-end bearings is very mature and perfect. Although the bearing looks very simple in structure, its The working environment is under very high pressure, and the environment in the fine field is even more severe. Due to the extreme motion of the object, it is easy to cause it to fatigue and fall off, so the requirements for the material steel for manufacturing are also very strict, and the purity and uniformity of the bearing steel are also very strict. Degree is its main measurement index, and material defects are an important reason why my country’s bearing industry cannot keep up with the world’s advanced level.

To prevent bearing defects, manufacturers must implement stringent quality control measures, adhere to industry standards, and invest in advanced testing and inspection techniques. Regular audits and feedback from customers can help identify areas for improvement in the manufacturing process.

It’s important to remember that the situation may have changed since my last update, so it is advisable to consult up-to-date and reliable sources for the latest information on bearing defects in China or any other region.

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