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What Is The Quality of The Bearings Produced in China?

What Is The Quality of The Bearings Produced in China?

Aug 3,2021
What is the quality of the bearings produced in China?

Chinese bearings in the eyes of many people

Many friends asked: "Why can't Chinese bearings work?" Many people answered: "China's machining is poor and heat treatment is not good." There are many similar questions and answers. Perhaps due to certain psychology, Chinese bearings do not refer to the trust of the Chinese people like bearings produced in other countries. However, the facts are not really what those people say.

Chinese bearings have begun to go international

In fact, many people may not know that China not only provides raw materials-bearing steel for foreign companies, but also supplies key bearing components and even key bearing components for Sweden's SKF, German Schaeffler, American Timken, and Japan's NSK Finished bearings.


But some friends don’t believe it. China Bearing is really as unbearable as this netizen said. Today I will tell you the true level of Chinese bearings.


Let me talk about bearing parts first. Among the many counterfeiting incidents in Japan, one is about Chinese bearing steel balls.


In 2018, Japanese machine parts manufacturer Tsubaki Nakajima was revealed to have purchased Chinese bearing steel ball products, disguised as Japanese domestic steel ball products for sale.


Tsubaki Nakajima himself admitted that because of the insufficient output of his own products, he deliberately purchased Chinese steel balls and sold them as Japanese products.

Tsubaki Nakajima also said that China's precision steel balls meet the standards required by customers, and their safety has not been affected, and they have not heard any objections from customers.


Tsubaki Island Group has always enjoyed the reputation of being a top manufacturer in the field of international precision steel ball manufacturing. This incident shows that the Chinese bearing steel balls purchased by Tsubaki Island are no different from Tsubaki Island's own products.

China bearing manufacturing

Next, we will introduce two Chinese-bearing companies.

Of course, the most famous Chinese-bearing brands are LYC, ZWYZ, and so on.


Let’s talk about LYC. Its product size ranges from inner diameter 10mm to outer diameter 13.5m. It is widely used in wind power generation, rail transit, automobiles and motorcycles, mining and metallurgy, engineering machinery, machine tool motors, industrial gearboxes, medical equipment, and ports. Machinery, ships, and other fields.


LYC has successively made supporting bearings for major projects such as Tiangong-2, Shenzhou series spacecraft, Change series satellites, Long March 5 carrier rocket, C919 large aircraft, AG600 amphibious aircraft.


LYC also provides the main bearings of medical CT machines for the world's largest medical device manufacturer. At present, there are only 3 companies in the world capable of producing, and LYC is one of them.


LYC is also the world's largest port machinery manufacturer. It has developed a 10.3-meter diameter monolithic super-large slewing bearing, weighing 85 tons, and having a rotation accuracy of 0.12 mm.


LYC is also the first bearing manufacturer in China that has obtained the American Railroad Association and quality management system certification. Luozhou's railway bearings have been exported to the United States.

China bearing

And speaking of ZWYZ, the leading products of ZWYZ Group are major technical equipment supporting bearings, rail transportation bearings, automotive vehicle bearings, military equipment bearings, etc. The domestic market share of leading products is more than 20%.


In the field of industrial equipment bearings, the five-coupled paired angular contact ball bearings developed and designed by well-known Japanese companies are used in the lead screw spindles of electro-hydraulic injection molding machines.


There are only a few well-known bearing companies in the world that can produce this kind of bearings. ZWYZ has also developed four specifications for electric-hydraulic injection molding machines supporting bearings for Japanese companies, realizing the complete set of complete machines.


ZWYZ also supplied cement vertical mill bearings for the world's largest cement equipment manufacturer, Alphasmith, Denmark, breaking the custom of only choosing European high-end brands for the customer.


In the field of wind power bearings, ZWYZ is matched by Siemens of Germany. The high-speed end bearings of wind power gearboxes have now become Siemens' largest supplier, with an annual supply share of more than 60%. The bearing is also equipped with extra-large precision rollers for the German wind power bearing factory.

Finally, let us summarize

The top seven bearing manufacturers in the world all have a certain percentage of "Made in China". If Chinese bearings are really as rubbish as those people say, Tsubaki Nakajima, Japan will not replace its own bearing products with "Made in China". Well-known bearing companies such as SKF of Sweden, Schaeffler of Germany, Timken of the United States, and NSK of Japan can purchase Chinese parts and raw materials in bulk, which is enough to prove that China's machining and heat treatment can meet the technical requirements of customers. The use of Chinese bearings by well-known foreign companies can also show that the quality and performance of Chinese bearings can meet the actual needs of users.


Of course, there are still many shortcomings and shortcomings of China Bearings, but they must not be totally denied. You cannot turn a blind eye to the advantages and progress of China Bearings. In short, you must maintain a clear self-awareness and have an objective and comprehensive understanding of yourself.