The outer packing is clear: in general, are factory brand has its own special foreign packaging designers design, and arrange production with the conditions of the factory production, so packaging is very clear from the lines to the colors & shy;
, unequivocally.
Seal character is clear: on the bearing body printed with brand, label, etc.
Font is very small, but is produced by the factory are mostly use seal technology, and before without overheating treatment of words, so the font although small, but concave & shy;
Deep, very clear.
And counterfeit products font instead of fuzzy, because of printing technology coarse, font float to the surface, in some cases can be easily erased by hand.
Whether there are miscellaneous ring: the bearing body with his left hand, right hand toggle coat to make it spin, listen to its hybrid ring.
Due to the backward production conditions most of the counterfeit products, fully manual mill operation, in the process of production inevitably mixed into the sand & shy;
Kind of impurity, hidden in the bearing, so makes a noise when rotating ring.
This is and strict production standards, and use machine operation are factory is the biggest difference between brands.
If there is a muddy surface oil stains: it should pay special attention to when buying FAG bearing.
Due to the current domestic antirust technology is not particularly home, so the antirust processing was carried out on the bearing body and is easy to leave a thick oil stains, holding the stick & shy;
Thick thick, while the foreign original FAG bearings can hardly see the trace of anti-rust oil, is particularly careful expert said FAG bearing smell a smell, must be under the anti-rust oil, just can't see.
Chamfer whether uniform: so-called bearing chamfer, namely horizontal plane and vertical plane junction, counterfeit bearings because of the limitation of production technology in the area of the fringes is handled.
Manufacturing process of the deviation caused by vibration, the smaller the deviation, the less vibration.
Roundness, waviness and surface roughness on the surface of the steel ball is the FAG bearing parts in the most profound effect on the vibration factor, followed by the shape of the inner ring and outer ring channel error and surface roughness, again is bearing cleanliness and lubricant quality, etc.
Operation conditions such as the installation conditions, speed, direction of axial load, quantity, etc.
Bearing surface form of fatigue failure is a failure, mainly for fatigue crack initiation, expansion and fracture process, under alternating load generated by the fault of the long-term effects of the metal.
Cracks in two aspects: first, on the surface, this is, FAG bearing in the process of rolling contact, because of the work in the plastic deformation and strain hardening on the surface of the contact stress on the surface of the cyclical changes caused by the effect of external load, and finally on the inner surface of the small crack from the development, the formation of surface crack between the two, because Xie into the lubricant on the surface of the work, the power of the open, crack down on the wall, crack force to move forward;
Second: from the surface, under the pressure of repeatedly, the surface contact, the first where exposed on the surface of the crack depth of a crack, and along the surface direction Angle, to a certain depth, since on the surface of contact area, and beyond the surface, and finally form the corrosion, leaving a horse pit.
