In general, rolling bearing of SKF bearings itself does not produce noise. The "bearing noise" we usually felt in fact is the sound effects that SKF bearings vibrate with the surrounding structure directly or indirectly.

This is why the noise problem can be regarded as vibration that involves the application of the bearings in the many times.The excitation that produced due to the changes in the number of load rolling.When a radial load on a bearing, its number of rolling element that bearing load will slightly change in operation,that is:2-3-2-3 .... This caused the shift on the load direction.Which resulted the vibration is inevitable, but can reduced by the axial pre-load,loaded on all of the rolling element (not for the cylindrical roller bearings of SKF bearings).

The wave degrees of the part:Under the close cooperation between the bearing ring and the bearing seat or transmission shaft,the bearing ring may be deformed shape compatible with the shape of the adjacent parts. If there is distortion,it may produce vibration in the operation.Therefore,it is very important to produce the bearing seat and the transmission with a required tolerance.

Local damage: As the operation or installation error, a small part of the raceway and rolling element of the bearings may be damaged.When running, rolling across the damaged bearing components will generate a specific vibration frequency.The frequency analysis can identify the damaged bearing components.

The vibration behavior of applications: In many applications, the bearing stiffness is the same as the stiffness of the surrounding structures. Because of this feature, as long as choose the correct bearings (including pre-load and clearance) and the configuration in the application, it is possible to reduce the vibration in the application.