(1) "Tiny Cooling Fan" adverse bearing quality. Bearing scraping poor quality, Ugyen bad contact or bodiless; Rolling Rolling decent cracks, chipping, peeling, etc., will undermine the stability and uniformity of the film, the surface of the bearing heat.
(2) poor lubrication quality. The purpose of lubrication is to make movement part not in direct contact friction, and the formation of friction between solids and liquids. If the number of inadequate or poor quality lubricants, static and dynamic part of the direct causes friction and heat, or heat can not be taken away by the lubricating oil, leaving the bearing temperature.
(3) "Tiny Cooling Fan" felt tight seal and fever.
(4) Rolling poor assembly quality. As the inner sleeve and the shaft of the tightening force is insufficient, jacket and bearing clearance is too large or too small.
(5) bearing excessive vibration and to withstand shock loads, seriously affect the stability of the lubricant film.
 (6) "Tiny Cooling Fan" bearing cooling water shortage or disruption, the impact of the heat out, leaving the bearing temperature.