2, steel printing is clear: Each bearing products will be printed on the body of the bearing body with its brand name, label and so on. Although the font is very small, but the regular manufacturers of products used in the printing technology printing, and not before the heat treatment before the word, so the font is small, but concave deep, very clear. And usually, counterfeit products, the font is not only blurred, because the printing technology is rough, the font floating on the surface, and some even easily can be wiped by hand or hand traces of serious.
3, whether there is a noise: left hand holding the oil-free bearing body sets, right hand toss the jacket to rotate, listen to the operation of the bearing whether there is a noise. As most of the counterfeit products production conditions behind, completely hand-workshop operation, in the production process will inevitably be incorporated into the body of dust, sand, a class of impurities, so when the rotation of the bearing will appear when the noise or running is not smooth The This is to determine whether the product from the strict production standards, and the use of machine operation of the regular manufacturers of the key brand products.
