If the root cause of the first bearing failure was not diagnosed then repeat failures are likely. Bearings can also be damaged by contamination by dirt, impact damage if incorrectly fitted, poor alignment during fitting.
There are plenty of other potential causes such as poor lubrication, corrosion, incorrect interference fit, etc. but these should not be an issue if the correct bearing has been fitted.
As the previous poster says, if the mounting surfaces are damaged then the bearing may not seat properly or may be loose and free to move around. Removing the bearing and checking the stub axle and outer housing for damage would rule out the latter issue. Any corrosion or mechanical damage should be removed before fitting the bearing and fitting should be done by pressing the interference-fitting race into place using a press and appropriate drift to ensure the fitting load is not transmitted via the roling elements in the bearing.
|