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In general, bearing in itself does not produce noise. Often feel "bearing noise" is in fact the bearing directly or indirectly generate a sound effect and vibration surrounding structures. This is why many noise problems can be considered when it comes to the application of the entire bearing vibration problem.
    Exciting because of the number of changes in load resulting from rolling

    When a radial load bearing loads at a number of its load bearing rolling elements in the operation will be a slight change, ie 2-3 -3-2-3 .... This caused a shift in the load direction. The resulting vibration is inevitable, but can be mitigated by pre-loading the axial load on all rolling elements (not for cylindrical roller bearings).

    Waviness components

    In the case of a snug fit between the bearing ring and the bearing or shaft, the bearing ring may shape compatible with adjacent components and deformation. If there is distortion, it may generate vibration during operation. Accordingly, the bearing and the shaft machined to the required tolerance is very important.

    Local damage

    Since the operation or installation error, a small part of the bearing raceways and rolling elements may be damaged. In operation, the member across the damaged bearing generates a particular frequency of vibration. Vibration frequency analysis can identify the damaged bearing components.

    Vibration behavior of applications

    In many applications, the same stiffness and rigidity of the structure around the bearing. Because of this feature, as long as the correct choice of bearings (including pre-load and clearance) and its configuration in the application, it is possible to reduce the application of vibration.

    There are three ways to reduce the vibration:

    Removing critical excitation from the application of vibration;

    Suppression of resistance between the part and the resonant excitation components critical excitation vibration;

    Changing the stiffness of the structure, thus changing the critical frequency.