If you are familiar with bearings, you can generally doubt them from the appearance.

Whether the outer packaging is clear: Under normal circumstances, Zhengchang's brands have their own special designers to design the outer packaging and arrange factories with production conditions for production, so the packaging is very clear and unambiguous from lines to color blocks.

Color: The appearance color of NSK imported bearings can fully reflect the material situation of NSK imported bearings. Some manufacturers have made great efforts in the use of steel, reducing the types of steel and replacing steel with inferior products. The appearance color is mostly white, which is obviously different from the green color of bearing steel imported from NSK.

Whether the steel seal is clear: brand words and labels will be printed on the bearing body. The font is very small, but most of the products produced by the factory use steel printing technology, and they are pressed before overheating, so the font is very small, but it is very deep and clear. The fonts of counterfeit products are not only vague, but also float on the surface because of rough printing technology, and some can even be easily erased by hand.

2. Is there any noise?

Hold the bearing inner sleeve and stir the outer sleeve to make it rotate, and listen for noise. Due to the backward production conditions of most counterfeit products and completely manual workshop operation, impurities will inevitably be mixed in the production process and hidden in the bearing body, so it will make noise when rotating.

3. Is there muddy oil on the surface?

Pay special attention to this point when buying imported bearings. Because the current domestic anti-rust technology is not particularly good, it is easy to leave thick oil stains when carrying out anti-rust treatment on the bearing body, which is sticky and thick in the hand, while almost no traces of anti-rust oil can be seen on the bearings imported from abroad.

4, chamfer evenly

The so-called chamfering of bearings, that is, the joint between horizontal plane and vertical plane, is not satisfactory because of the limitation of production technology.

5. Weighing

With the same model of "NSK" bearings, the materials used in counterfeit bearings are obviously less than the genuine ones. Because most fake bearings cut corners, replacing high oxidation special steel with ordinary steel will be lighter than genuine ones.

6. Price

The price of NSK bearings is certainly much higher than that of domestic bearings. The NSK bearing you want to buy at the price of domestic bearings must be fake.