Commonly used identification methods for bearings

With the continuous increase in the number of domestic cars, the demand for auto parts and auto supplies is also increasing. However, there are many large and small parts and supplies stores in Guangzhou, and the goods are mixed, and many fake and inferior products Mixing among them can cause losses to the car owner, and in severe cases, it can even cause casualties. In order to allow car owners to have a certain understanding of the characteristics of the accessories and supplies of the original brands, a special "Smart Consumer" column will be opened on the owner's page from this week to introduce various types and accessories of major car brands to car owners. The way of identification. I hope that with the development of the column, the concept of respecting the brand, eliminating fakes, and using genuine products will be deeply rooted in the hearts of the people. This is our hope and the direction of our efforts.

It is not an exaggeration to call the bearing a joint of a car. In a car, not only its four legs—wheels need bearings, but all the rotating machine parts require the participation of bearings. It is a very inconspicuous but important thing in the transmission system. Because of the heavy workload and the relatively high degree of wear, bearing replacement is a common thing in automobile maintenance. Walking in the auto parts market, I found that there are a lot of bearing stores operating various brands. However, what is the quality of the bearings they sell? Is it true that the brand is marked on the package? This question has probably circulated many times in the mind of every car owner. The following introduces you to several common methods to identify bearing quality:

Whether the outer packaging is clear: Under normal circumstances, the brand has its own dedicated designers to design the outer packaging, and arrange production in factories that pass the production conditions, so the packaging is very clear and unambiguous from the lines to the color blocks. . (Some imported brand accessories have unique designs on their packaging to protect their intellectual property rights, which will be introduced in detail in future content).

Whether the stamping is clear: Brand words, labels, etc. will be printed on the bearing body. The fonts are very small, but most of the products produced by the factory use steel stamping technology, and they are pressed before heat treatment. Therefore, although the fonts are small, they are deeply concave and very clear. The fonts of counterfeit products are not only fuzzy, because of the rough printing technology, the fonts float on the surface, and some of them can even be easily erased by hand.

Whether there is noise: Hold the inner sleeve of the bearing with your left hand, and turn the sleeve with your right hand to listen to whether there is any noise. Due to the backward production conditions of most counterfeit products and the completely hand-crafted workshop operation, it is inevitable that impurities such as sand will be mixed in the bearing body during the production process, so noise will be generated when rotating. This is the biggest difference from a genuine brand that strictly enforces production standards and uses machines to operate.

Whether there are turbid oil stains on the surface: This should be paid special attention to when purchasing imported bearings. Since the current domestic anti-rust technology is not very popular, it is easy to leave thick oil stains when anti-rust treatment is performed on the bearing body, which is sticky and sticky in the hand, while it is almost invisible on the original imported bearings from abroad. When it comes to the traces of anti-rust oil, a very careful expert said that the imported bearings smelled a kind of smell, it must be the anti-rust oil, but they can't see it.

Whether the chamfer is uniform: the so-called chamfer of the bearing, that is, the junction of the horizontal plane and the vertical plane, the counterfeit bearing is not handled satisfactorily at these corners due to the limitation of production technology.