Judgment imported bearings remove the possibility of re-use, INA bearings after cleaning, inspection, carefully check the raceway and rolling surface, with the surface state of the wear of the cage mill bearing clearance and whether the impact of sizethe decline in accuracy of damage, abnormal. Non-separation of small ball bearings, the inner flat side, with one hand, rotate the outer ring to confirm whether smoothly.

Bearing and separation of bearings, rolling element, the outer ring raceway surface were examined.

Large bearing because they can not hand rotation, pay attention to check the rolling element and raceway, to maintain the appearance of the frame, ribs, face, the importance of the INA bearing higher need to be cautious examination.

Judgment bearing the possibility of re-use, bearing damage, mechanical properties, the importance of operating conditions, check the cycle, and other related factors to decide. Check if any of the following defects are found, the rolling mill bearings can not continue to use the new bearings need to be replaced.

On the surface, this is the role of imported bearings in the process of rolling contact, due to the cyclical changes of the work surface plastic deformation and strain hardening the surface of the contact stress caused by external load, and finally in from the development of small cracks the inner surface between the two surface cracks, wedged into the lubricant of the work surface, open the power to crack down on the wall, forcing the crack to move forward;

From the surface, repeated pressure, surface contact, the initial place to a certain depth in the exposed surface of the crack cracks along the surface direction of the point of view, to a certain depth from the surface of the contact surface, and beyond surface, and eventually the formation of erosion stripped, leaving a Ma Hang.
 
On the surface, or surface cracks, these two objectives (parts carburizing, quenching and surface heat treatment, if uneven hardness, organizations, and non-uniform internal stress and other adverse, exposure to stress in general from the underground cracks have the opposite affect, if the part surface quality is poor, there is a defect (oxidation, decarburization), friction, or poor lubrication from surface cracks.



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