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Often feel "noise" in fact is the sound effect of thin wall bearing bearing directly or indirectly to the surrounding structure vibration.
This is why many times the noise problem can be regarded as related to the application of the vibration of bearing. Vibration caused by loading the rolling body quantity change when a radial load on a thin wall bearing, the bearing load of the rolling element number may vary slightly in operation, the resulting vibration is inevitable, but can be mitigated by axial pre load, loading on all rolling body.
The components of the wave of tight fit between the bearing ring and the bearing or shaft case, NTN 6311ZE bearing ring with the adjacent parts of shape matching deformation. If there is deformation, in operation it may lead to vibration. Therefore, the bearing and shaft machined to the required tolerances is very important.

Local damage due to the operation or incorrect installation, small part of thin-wall bearing raceways and rolling elements may be damaged. In the operation, rolled over the NTN 6311ZE damaged bearing components will produce a specific vibration frequency. Vibration frequency analysis can identify the damaged bearing components. The vibration behavior of applications in many applications, the stiffness and the stiffness of the surrounding structure bearing the same. Because of this characteristic, as long as the correct choice of bearings (including preload and clearance) and its application in the configuration, it is possible to reduce the application of vibration.
NTN 6311ZE bearing whether can judgment is based on the need to consider the extent of the damage, but the main consideration in this regard is the effect of the injury, for the performance, the mechanical aspects of the importance, the installation conditions need to be considered, and decided to the next during the overhaul the effect, but the defect is not in use, you must replace thin-wall bearing inner ring, the outer ring of the new, for, the rolling body, the holder of any cracks on the gap is to note, an effect that is maintained in this regard. So the sense also has the skill, the following is from the eight to the rules.
NTN 6311ZE bearing load, the roller and raceway contact produces plastic deformation. The load is overweight, the roll forming surface plastic deformation of pit road, and make the bearing vibration and noise produced in the operation in the summer burning.
Since the invasion of the rolling elements and raceways relative motion and dirt, dust, so that the rolling elements and raceways surface abrasion. The wear volume is larger, the shaft bearing clearance of NTN 6311ZE, noise, vibration increases, reducing the running accuracy of thin section bearings, which directly affect the accuracy of some host. So the bearing precision machinery, can wear to limit the bearing life.