2 Using high-input marking equipment, in order to establish a corporate brand image and prevent products from being counterfeited, FAG bearing manufacturers have adopted laser marking machines, hoping to establish a corporate image and connect with the international market, while using high input to control products being counterfeited, however, Because the laser marking machine uses computer control, the advantages of easy editing of marking fonts and sizes can not only effectively prevent counterfeiting, but also increase the difficulty for counterfeiters.
3 observation method. The rolling bearing should be observed with the naked eye. The inner and outer raceways should have no peeling marks and severe wear and be in the shape of a circular groove; all the rolling elements should be free of spots, cracks and peeling; the cage should not be loose, damaged or worn. , the gap with the rolling element is not too big.
4 feels. The gap between the inner and outer races of the normal bearing and the rolling elements is 0.005 to 0.010 mm. For rolling bearings that have been used for one stage, when the inner race is pinched with your fingers for axial sway, there should be no obvious squeaking noise.
5 rotation method. Hold the inner race of the bearing with one hand and turn the outer race with the other hand. The bearing should be able to rotate flexibly and the radial sway should not be felt.
6 Of course, it depends on the price. If the price is much lower than normal, it may be a fake proposal. Don't buy it. After all, a penny is worth the price. It is really expensive after all, so the import is very expensive.
During the inspection, the above five empirical methods should be combined to facilitate the correct judgment of the technical state of the rolling bearing. For tapered roller bearings, it should also be observed whether the rolling elements are located in the middle of the outer race. If there is a forward movement, it should not exceed 1.5 mm.
In addition to the above-described discrimination method, it can be distinguished from color and precision. At the same time, you can also refer to other imported bearing brands, iko bearings, Sweden SKF bearings, the United States TIMKEN bearings, Japan NSK bearings, koyo bearings and other methods of distinguishing authenticity.
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