Bearing failure pattern

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Bearing failure form normal basically has two kinds: fatigue spalling and wear
(1) bearing fatigue failure normal
Bearing in the operation of the total hours or more than the total turn bearing computation life, what happened for normal fatigue failure spalling fatigue. P roduce normal failure reason is because the metal surface rolling in the operation of stress cycle number more than material fatigue limit, from times began to surface fatigue cracks initiation, and to the surface layer craze and metal fragments falling one spalling. Normal fatigue failure display characteristics: fatigue crack initiation in time surface, so see, with ordinary instrument also can t protected reliably against detective to. Spalling of surface coarse crumbs and irregular, the original scroll surface scars, small pit, called pitting corrosion. Pitting once appeared, namely expanding quicklyslewing bearing suppliers, a short time cause fatigue spalling is comprehensive, appropriate early replacement bearing, otherwise it will cause the accident sex scrap bearing can be installed on the machine parts and even bring serious consequences.
More than the service life of the fa tigue calculation spalling, is in fact the inevitable end is inevitable phenomenon, then the potential of material force has been fully used. If users in the working life of the requirements is still not satisfied, can be in bearing add lubricant add appropriate extreme pressure additives to higher performance more bearing or size,slewing bearing manufacturers or choose vacuum metallurgy, vacuum heavy tried many times and other steel by the system bearing.
(2) bearing failure to normal wear
Bearing in the operation of the total hours or more than the total turn bearing computation life, or exceed the chapter 5 second third quarter of method of presumption wear life after the excessive wear, for normal wear failure. Reason is: rolling bearing exercise with tiny sliding, there is also always some load fluctuation, and lubrication can delay the wear but actual can t avoid two solid contact interface, namely cannot avoid completely wear. It showed what features are: the rolling along the surface movement direction happen a smoother wear stripe, new stripe have remarkable metallic luster. The rolling bearing normal wear also have two stages, namely short-term "run close" wear, long time the flat wear, and the short-term severe wear, the loss of the bearing accuracy, or cause vibration and noise, and not continue to use.
More than the rated life or wear life wear failure, the present technology level conditions in fact is inevitable. If users in the working life of the requirements is still not satisfied, can improve the bearing lubrication method, choose the more effective lubricant, according to the specific situation or add appropriate oily additives or anti-wear additives, improve the bearing and lubricant clean degree, improve sealing etc.slewing bearing