Common sense of hardware accessories: how to distinguish the authenticity of bearings

1. Look at the appearance of the bearing. If the finish of the bearing is lower than (△8), it is a fake product. The genuine model is laser-engraved and is not afraid of rubbing. The fake model will be wiped off as soon as it is wiped.

　　2. The corners of the bearing are black, and the genuine product is not afraid of water fading. The fakes turn into black mud when they see the water, or they can be wiped off, or the black paint is used directly.

　　3. Most of the bearing packaging is the same as the real one. Need to be verified by experience.

　　 Is the outer packaging clear?

　　 Under normal circumstances, the Zhengchang brand has its own dedicated designers to design external packaging, and arrange for production in factories that pass the production conditions. Therefore, the packaging is very clear and unambiguous from lines to color blocks. There are also unique designs on the packaging of imported brand accessories to protect their intellectual property rights.

　　 Is the steel stamp clear

　　 There will be brand words, labels, etc. 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 deep 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.

　　 Is there any noise?

　　 Hold the inner sleeve of the bearing with your left hand, turn the sleeve with your right hand, and listen for 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.

　　 Are there any muddy oil stains on the surface?

　　 This should be paid special attention to when buying imported bearings. Since the current anti-rust technology in China is not very popular, it is easy to leave thick oil stains when anti-rust treatment on the bearing body, which is sticky and sticky on 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.

　　 Is the chamfer uniform?

　　 The so-called chamfering of the bearing is the junction of the horizontal plane and the vertical plane. Due to the limitation of production technology, the counterfeit bearings are not handled satisfactorily at these corners and corners.