to increase the vibration, noise increases.

Pitting is the most typical form of bearing failure, mainly because of the bearing frequent impacts during transportation and incorrect assembly, make raceway indentation. When the raceway after indentation. The rotating roller, each indentation is produced after a first impact, on a rolling indentation effect, when the load increases, the greater the pressure roller in the cycle of movement which, at the indentation will produce flakes peeling, and to increase the vibration, noise increases.

      In addition, when the external load on the bearing and does not rotate, due to external vibration can cause the bearing inner ring raceway indentation, over time will lead to the raceway flaking, peeling debris is more harmful to the bearing, in order to prevent these incidents occurrence in the daily work, effective methods can be used to eliminate the vibration source and vibration, maintain good lubrication, the bearing can be applied to the initial light load, the rolling body in good contact with the roll, to improve the ability of seismic also with the hole in the installation misalignment will cause bearing failure.

      In practical work due to poor lubrication or excessive work overload, excessive heat generated by friction and soften bearing steel, while causing the bearing manufacturer to volume expansion, each extrusion pressure, when it reaches a certain level, the bearing will be locking the shaft on. Volume when the bearing overheats the holding bracket rolling gap becomes smaller, the stress concentration on the retainer, with the time, the cage will be broken, thereby accelerating the rate of bearing failure.

      With the gap effect, the gap between the shaft and the shaft is too large, the relative movement between the two, one with the shaft section of the gap increasing excessive wear, leading to bearing failure: two of the bearing cracks, impact accuracy of movement. These causes of premature bearing failures are detrimental to our actual work, so study how to avoid premature bearing failure and prolong life is very practical value.