Teach you how to judge the quality of oilless bearing
oilless bearing outer packaging is clear
Under normal circumstances, the factory is the brand of oilless bearing have their own design and design of external packaging, and arrange the production conditions of the factory to produce production, so the packaging from the line to the color blocks are very clear, unambiguous, Some of the SKF branded accessories also have a unique design specifically designed to protect their intellectual property.
oilless bearing on the steel seal is clear
In the oilless bearing body will be printed on the brand name, label and so on. The font is very small, but most of the products are produced by the use of stam ping technology, but also before the heat treatment before the pressure word, so the font is small, but concave deep, very clear. The counterfeit product font is not only blurred, because the printing technology is rough, the font floating on the surface, and some even easily can be wiped out by hand.
Oil bearing without oil bearing
Left hand holding the oilless bearing bearing the inner sleeve, the right hand toss the jacket to rotate, listen to 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 mixed with a class of impurities in the sand, hidden in the bearing body, so when the rotation will be issued a noise. This is the biggest difference between the strict implementation of the production standards and the operation of the machine.
Whether the oilless bearing surface has turbid oil traces
This should pay special attention when buying oilless bearing. As the current domestic anti-rust technology is not particularly home, so the anti-rust treatment of the bearing body is easy to leave a thick oil traces, get in the hands of sticky, and foreign original SKF bearings almost do not see the anti- Rust oil traces, it touches on the special care of the experts that oilless bearing smell there is a taste, certainly under the rust-proof oil, just do not see it.
oilless bearing chamfer is uniform The so-called oilless bearing chamfer, that is, the intersection of the horizontal and vertical, counterfeit oilless bearing due to the limitations of production technology, in these corners of the disposal of unsatisfactory.
The use of oilless bearing in oilless bearings of various mechanical devices, instruments and other market requirements increasingly stringent performance requirements for oilless bearing, performance is also increasingly diverse. In order to be able to choose from a large number of structures, sizes, choose the most suitable bearings, from a variety of angles need to study. In the choice of bearings, in general, consider the axis of the bearing arrangement, installation, removal of the difficulty, bearing the space allowed, size and bearing the market, etc., generally determine the bearing structure. Second, while comparing the use of bearing a variety of mechanical design life and bearing a variety of different durability limits, while determining the bearing size. In the choice of bearings, tend to only consider the fatigue life of the bearing, the grease from the aging of the grease life, wear, noise, etc. also need to be fully studied. Moreover, according to different purposes, it is necessary to choose the precision, clearance, cage structure, grease and so on requirements, specially designed bearings. However, the choice of bearings and not a certain order, the rules, priority should be considered is the oilless bearing required conditions, performance, the most relevant matters, especially practical.
oilless bearing in the work to allow a slight operation of the sound, if the sound is too large or there is no abnormal noise or impact, then the oilless bearing failure.
oilless bearing noise causes more complex, one is the bearing, the outer ring with the surface wear. As a result of this wear and tear, damage the bearing and shell, bearing and shaft with the relationship, resulting in the axis deviation from the correct position in the shaft at high speed movement abnormal sound. When the bearing fatigue, the surface of the metal peeling off, but also the bearing radial clearance increased abnormal sound. In addition, INA bearing lubrication is insufficient, the formation of dry friction, and bearing broken and so will produce abnormal sound. oilless bearing wear loose, the cage loose damage, will produce abnormal sound.