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One reason of bearing fault, defect and overload are two major factors, when the load exceeds the limit strength of the material as a result of 5309 bearing dimensions parts breaking overload fracture, will defect organizations and local overheating burn in bearing during operation, the fracture caused by defects.
Two, bearing in operation process, sometimes between bearing surfaces will squeeze into the debris particles or external hard hard foreign bodies or the metal surface, which is caused by abrasion bearing furrow shaped, these hard foreign body through the lubricant into the bearing internal, along with the continuous operation of the bearing, the local friction, easy to cause the local deformation and friction surface friction micro welding phenomenon, even possible partial melting, finally caused the occlusion phenomenon.
In general, the bearing is in itself does not produce noise. We said the noise is actually sound effect bearing directly or indirectly with the surrounding structure vibration.

Vibration caused by loading the rolling body quantity change when a radial load on a bearing, the bearing load of the rolling element number may vary slightly in operation, namely: 2-3-2-3.... this caused offset load direction. The resulting vibration is inevitable, but can be mitigated by axial pre load, loading on all rolling body (cylindrical roller bearing is not suitable for the bearing of).
The components of the wave of tight fit between the bearing ring and the bearing or shaft case, bearing ring with adjacent components shape matching deformation. If there is deformation, in operation it may lead to 5309 bearing dimensions vibration. Therefore, the bearing and shaft machined to the required tolerances is very important.
Local damage due to the operation or incorrect installation, a small part of the bearing raceways and rolling elements may be damaged. In the operation, rolling over the 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 5309 bearing dimensions the surrounding structure the same sliding bearing. 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.