When KOYO bearings, rotating, KOYO, bearing the inner and the outer ring raceway and rolling element rolling contact, thus the running track for the dark side, running track attached to the roller surface is not abnormal, the resulting change can belearned that the load conditions, so when the demolition of KOYO bearings, strict attention to and observe the trajectory of the raceway.
If you look closely the running track in this way, it is learned only required to bear the radial load to bear large axial load, under torque load, or extreme rigidity uneven on the bearing housing. Can check the bearing is coupled with an unexpected load and installation errors such as whether the country, and clues to be investigated for reasons bearing damage.
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