1. First, look at the outer packaging box of SKF bearing. Generally, the packaging box is white with blue background and red stripes on the bottom. But in the past two years, the products have flower boxes with several SKF trademarks. Then look at the production date of the bearing. If the bearing box is opened from the side, the production date and date code are on the box.

Is the outer packaging clear? Generally, the factory brands have their own special designers to design the outer packaging, and arrange factories with qualified production conditions to make production. Therefore, the packaging is very clear and unambiguous from lines to color blocks (some imported brands have unique designs for protecting their intellectual property rights)

Bearings produced after p>2.2 have bar codes on the packaging boxes.

3. Look at the bearing model. The bearing model has suffix letters A, B, C, D, E, etc. These letters respectively represent different production years. For details, please refer to the website in other relevant materials.

4. Pay attention to the SKF font on the trademark, where S is narrow at the top and wide at the bottom, and there are pits on the left vertical drawings of K and F..

5. Look at the steel seal. There are two kinds of letters indicating the model and origin on SKF bearing: pickling and laser processing.

carefully observe whether the steel seal characters are clear: brand words, origin, model and production code marks will be printed on the bearing body. Most of the products produced by the factory use steel seal technology and are pressed before overheating treatment, so the fonts are small, but deep and very clear, while the fonts of counterfeit products are not only vague, but also floating on the surface due to rough printing technology, and some of them can even be easily erased by hand.

6. after the bearing is unpacked, the big bearing is generally sealed with plastic bags, and the small bearing is made of plastic wrapping paper. There is a layer of grease on the bearing, and the real bearing has a bright appearance without corrosion and pitting.

whether there are muddy oil stains on the surface: we should pay special attention to this when buying imported bearings. Because the current anti-rust technology in China is not particularly good, it is easy to leave thick oil stains when carrying out anti-rust treatment on the bearing body, which will be sticky and thick in your hands. However, there are almost no traces of anti-rust oil on the bearings imported from abroad. However, very careful experts say that the imported bearings smell a smell, and they must have been coated with anti-rust oil, but they just can't see it.

7. Listen for noise: Hold the bearing inner sleeve with your left hand and turn the outer ring with your right hand to listen for noise. Because most counterfeit products are backward in production conditions and are completely hand-operated, impurities such as sand will inevitably be mixed in the production process and hidden in the bearing body, so it will make noise when rotating, which is the biggest difference with the brand of Zhengchang, which strictly implements production standards and operates with machines. See if the chamfering is uniform: the so-called bearing angle, that is, the junction between the horizontal surface and the vertical surface, is unsatisfactory because of the limitation of production technology.