To identify the quality of equipment bearings, we usually proceed from the following aspects:
1. Is the outer packaging clear?
Under normal circumstances, the brands produced by regular manufacturers have their own dedicated designers to design the external packaging, and arrange for production in factories that pass the production conditions. Therefore, the product packaging should be very clear from the lines to the color blocks. unambiguous.
2. Is the steel stamp clear
Each bearing product will have its brand name, label, etc. printed on the bearing product body. Although the fonts are very small, the products produced by regular manufacturers are printed with steel stamping technology, and they are pressed before heat treatment. Therefore, although the fonts are small, they are deeply recessed and very clear. Normally, the fonts of counterfeit products are not only blurred. Due to the rough printing technology, the fonts float on the surface, and some of them can even be easily erased by hand or have serious manual traces.
3. Is there any noise?
Hold the inner sleeve of the bearing with your left hand, and turn the sleeve with your right hand to make it rotate. Listen for noise during the operation of the bearing. Due to the backward production conditions of most counterfeit products and the completely hand-crafted workshop operation, the bearing body will inevitably be mixed with impurities such as dust and sand during the production process, so noise or unsmooth operation will occur when the bearing rotates. . This is the key to judging whether the product comes from a regular manufacturer's branded product that has strict production standards and is operated by a machine.
4. Surface
Whether there are turbid oil stains on the surface, we should pay special attention to it when buying imported bearings. Since there is still a certain gap between the domestic anti-rust technology and foreign advanced manufacturing countries, it is easy to leave thick oil marks when the bearing body is rust-proofed. There is almost no trace of anti-rust oil on the imported bearings. According to industry insiders, particularly careful people can smell a special smell on imported bearings, which is the smell of anti-rust oil.
5. Whether the chamfer is uniform
The so-called chamfer of the bearing is the junction of the horizontal plane and the vertical plane. Due to the limitation of production technology, the counterfeit bearing products are not handled satisfactorily at these corners and corners. We can easily distinguish this.
6. Packaging
Bearing packaging is divided into inner packaging and outer packaging
After the bearing is manufactured and passed the inspection, it will be cleaned and anti-rust treated, and then placed in the inner packaging to achieve the purpose of waterproof, moisture-proof, dust-proof, shock-proof, maintain the quality and accuracy of the bearing, and facilitate the use and sale. .
The inner packaging of the bearing is divided into three categories according to the anti-rust period:
①Short anti-rust period packaging: The anti-rust period is 3-6 months, suitable for bearings that are shipped to the same subscriber in large quantities and put into use in a short period of time. The two parties have agreed to use simple packaging based on the principle of ease of use.
②General anti-rust period packaging: one year anti-rust period, suitable for general-purpose bearings.
③Long anti-rust period packaging: two years anti-rust period, suitable for special and precision bearings.