The method of quickly judging the authenticity of SKF bearings from the surface

The appearance of SKF bearings directly determines their authenticity. The inspection of the original Swedish SKF should be carried out under astigmatism, and the appearance of the bearing, cracked bearing seat marks and other parts should be carefully observed. Let me share with you those parts that we should check.

Various mechanical scars, scratches, crushes, bruises, etc., which cause eccentric load and stress concentration, will cause poor installation, and various spherical roller bearings, such as abrasion, will reduce the rotation accuracy and service life.

Skinning and folding, and there are often different types of decarburization or carbon-lean phenomena around it. The material is easy to collapse, dent or wear. These two defects are not firmly bonded to the tapered roller bearing base metal. It is very detrimental to life and accuracy.

All kinds of cracks will become the source of stress concentration. Imported bearing nets will rapidly expand, such as raw material cracks. These cracks will cause bearing rupture, forging cracks, cylindrical roller bearing lines, heat treatment cracks and grinding cracks in the subsequent operation process. And so on, have a great impact on bearing life and work safety. In fact, for the important Wafangdian bearing factory, the bearing factory has carried out 100% magnetic or radiographic inspection of its component parts.

The riveting or welding quality of the cage, whether the welding position is correct, whether the joint bearing is too large or too small, mainly observe whether the rivet head is offset, skewed, loose, lacking flesh or double eyelids, and whether there is welding needle Insufficient bearings or excessive welding can cause jamming of rolling elements. The above items are the parts of the Chinese bearing net that we mainly check during the inspection of the original SKF. In addition, if the typing quality is not good, it should be considered as defective, such as blurred handwriting. Damage, in addition to the part of the Luoyang bearing factory inspected above, the serious ones are also Can not be accepted

Corrosion. Black skin and pitting, the latter two are the defects that are easy to store water and the dirt of Harbin Bearing Factory, which are the most likely to develop into rust. Corrosion leads to poor installation. The pollution source of early wear and fatigue is a full-pack roller bearing, and severe corrosion will cause it to be scrapped.

So the real SKF can also be seen in appearance. The above is just to help those who are planning to buy SKF.