Identification of various bearing quality
To determine the quality of bearings, we usually proceed from the following aspects:
The outer packing is clear Double row circular cone roller bearings in general, normal manufacturer production of brand has its own professional design external packaging design, and arrange production with the conditions of the factory production, therefore, the packing of the product no matter from lines and colors should be clear, unambiguous.
Is the stencil legible
Each bearing product will be printed on the bearing product body with its brand name, label, etc.Although the font is very small, but normal manufacturer production printing products are adopted the steel seal technology, and before without overheating treatment of words, so the font although small, but deep concave, very clear.And usually, the typeface of the counterfeit product is not only blurred, because of the rough printing technology, the typeface floats on the surface, some can even be easily wiped away by hand or serious manual marks.
Is there any noise
Hold the inner sleeve of the bearing with the left hand and rotate the jacket with the right hand slightly to hear whether there is any noise during the operation of the bearing.Because most of the counterfeit product production conditions, operation, fully manual mill bearing the body in the process of production inevitably mixed into impurities, dust, sand and so on bearing rotation will be mixed ring or not smooth phenomenon.This is the key to determining whether a product comes from a brand from a legitimate manufacturer that has strict production standards and operates with machines.
Whether there is turbid oil on the surface
Whether there are turbid oil marks on the surface requires special attention when purchasing imported bearings.Due to domestic antirust technology, there is still a gap with foreign advanced manufacturing countries, therefore the antirust processing was carried out on the bearing body and is easy to leave the thick oil stains, contact with the hand feeling sticky thick, and imported from abroad on the bearing of almost can't see any sign of the anti-rust oil.According to the personage inside course of study, the person of special careful can smell a kind of special flavor on the bearing of import, this is the smell of antirust oil.
Is the chamfer even
So-called bearing chamfer, namely horizontal plane and vertical plane junction, fake bearing products because of the limitation of production technology in the area of the fringes is handled in guanzhou, as we can easily identify.
Bearing the packing
Finished packing part and outer bearing in the manufacturing and after inspection, cleaning and antirust processing, then put into the inner packing, in order to achieve the waterproof, moisture-proof, dustproof, shock, maintenance quality and precision of the bearing and the purpose of convenient use and sell.