Rolling bearings reasons of quality and external conditions during use due to its carrying capacity, rotational accuracy and wear resistance change was not working properly when the bearing performance is lower than the requirements, bearing failure even failure, bearing failure and other unforeseen circumstances, machinery, equipment will stall, loss of function and other anomalies, in the short term to find out the cause, and take appropriate measures.
    The bearing should be able to maintain the performance and long-term use under good conditions. Bearing inspection and maintenance, inspection and maintenance is very important to prevent failures in the operation to focus on examination of bearing rolling sound, vibration, temperature and lubricant.
Contact fatigue failure means the bearing surface by alternating stress failure. Contact fatigue spalling occur in the bearing surface, often accompanied by fatigue crack, starting with the maximum alternating shear stress at the contact surfaces of the following, and then extended to the formation of different surface flaking shape, such as point-like pitting or pitting spalling , said shallow come into small pieces peeled off.
    The relative sliding friction between the surface of wear failure refers to failure to cause the metal work surface wear. Wear will cause the bearing parts gradual deterioration and eventually lead to the loss of dimensional accuracy of the bearing housing and other related issues. Wear may affect the change in shape, with the gap increasing and work surface morphology of lubricant is likely to affect its pollution to a certain extent, caused by the complete loss of lubricating function, and thus the loss of bearing rotation accuracy and even can not operate normally. The Wear Failure is all kinds of bearings common failure modes, the most common form of wear is usually divided into abrasive wear and adhesive wear.
Bearing vibration of bearing failure is obvious. Example: peeling, indentation, corrosion, cracks, wear will be reflected in the bearing vibration detected through the use of special bearing vibration measuring devices (frequency analyzer and vibration analyzer OK determination) to measure the size of the vibration values ??measured by the abnormal vibration frequency distribution inferred specific circumstances therefore require different due to the terms of use of the bearing or the sensor mounting position prior to the measurement value of each machine analysis and comparison standards.
Lubrication, improper installation of the bearing temperature usually bearing temperature with the operation began to slowly increase the steady state is reached after 1-2 hours. The bearing normal temperature due to the heat capacity of the machine, heat dissipation, speed and load. abrupt increase in abnormal high temperature this time must be shut down and take the necessary precautions.
 
 



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