1, improper installation, (about 16%)
Installation using brute force, direct percussion with a hammer bearing bearing injuries most; was the main cause deformation.
Installation is not in place, install the biased or not attached to the bearing, resulting in bearing clearance is too small. Inner and outer rings are not in the same center of rotation, resulting in different hearts.
Recommendation: select the appropriate bearing installation tool or professional, installed using special instruments and detection.
2, poor lubrication (~ 50%)
According to the survey, poor lubrication are a combination of one of the major causes of premature bearing damage. Major causes include: no equipment lubrication or lubricant in a timely manner; lubricants or lubricant is not filling in place; lubricants or lubricant improper selection; incorrect lubrication, and so on.
Recommendation: choose the right lubricants or lubricant, using the correct lubrication of filling.
3, pollution (about 14%)
Pollution can also cause premature bearing damage, pollution of dust, metal chips, etc into the bearing. Major causes include: open bearing packing prematurely before using, resulting in pollution; installation work environment is clean, pollution; bearing's working environment is clean, medium pollution, and so on.
Recommendation: before use, it is best not to open the packaging of bearings; installed when you install the environment clean to clean the bearings to be used; enhanced bearing sealing device.
4, fatigue (~ 34%)
Fatigue is a common damaged bearing. Common causes of fatigue may be: combination bearing long-term overload operation; not timely maintenance; improper maintenance; ageing of the equipment.
Recommendation: choose the appropriate type of bearing, fatigue combined bearings replaced in a timely manner on a regular basis.
Above are the most common of several reasons for early damage of bearings; cause of early damage of bearings is multifaceted, are key reasons above, can sometimes be comprehensive reasons. If the bearing selection is correct, install correctly in place, lubrication and lubricant selection is correct, bearings are working correctly very often.
1) (G) of tolerances combined bearings;
2) radial spherical plain bearings only accommodate radial loads thrust bearings only accommodate axial loads;
3) =0.1C (c is the basic dynamic load rating of the bearing);
4) combination of rigid bearings and shafts;
5) normal lubrication and cooling conditions.
When bearing in 0.1C when running under load conditions, due to contacts between the rolling elements and Raceway contact surface stress increases, leading to high bearing operating temperature, relative deterioration of the lubricant, therefore, combined bearings the speed limit will be reduced accordingly.


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