1. Is the outer package of the imported bearing clear
In general, the imported bearings of Zhengchang brand have their own special designers to design the external packaging, and arrange the factories with qualified production conditions to make the production.
Therefore, the packaging is very clear and unambiguous from the lines to the color blocks. Some imported brands have special designs on the accessories packaging to protect their own intellectual property rights.
2. Is the steel seal on the imported bearing clear
The imported bearing body will be printed with brand words, labels, etc. The font is very small, but most of the products produced by the factory use steel seal technology, and they are pressed before overheating treatment. Therefore, although the font is small, it is deeply concave and very clear.
The font of counterfeit products is not only fuzzy, because the printing technology is rough, the font floats on the surface, and some can even be easily erased by hand.
3. Whether the bearing body of the imported bearing has noise
Hold the inner sleeve of the imported bearing with the left hand, and rotate the outer sleeve with the right hand to hear if there is any noise. Due to the backward production conditions of most counterfeit products and completely manual workshop operation, it is inevitable that impurities such as sand will be mixed into the production process and hidden in the bearing body, so it will make noise when rotating.
This is the biggest difference between the brand of Zhengchang, which strictly implements the production standards and operates with machines.
4. Whether there is muddy oil mark on the surface of imported bearing
This should be paid special attention when purchasing imported bearings. Experts who are particularly careful say that imported bearings smell like rust proof oil, but they can't see it.
5. Whether the chamfering of the imported bearing is even or not.
The so-called chamfering of the imported bearing is the junction of the transverse plane and the vertical plane. Due to the limitation of the production technology, the processing of the counterfeit imported bearing at these corners is not satisfactory.