How to Choose the Clearance of the Bearing?

Bearing clearance (including radial clearance and axial clearance) has a certain influence on the fatigue life, rotational accuracy, vibration noise and friction of bearings. Bearing clearance can be generally divided into original clearance, mounting clearance and working clearance. As a bearing user, the most concerned is the working clearance of the bearing. And in fact, the correct working clearance is to ensure the normal operation of the bearing necessary conditions. The so-called selection of bearing clearance, is to select the original clearance of the bearing. In the actual application of the bearing, there is a clearance and fatigue life of the best point, the best point, for ball bearings is the work clearance for zero value, and for roller bearings is the existence of a very small amount of positive clearance. Life performance is the best. National standards on deep groove ball bearings, cylindrical roller bearings, spherical ball bearings, spherical roller bearings and other common types of bearings provide different clearance groups. In the selection of bearing clearance, for general bearing applications, according to the working conditions can directly choose the standard clearance group. For example, the general working conditions can choose the basic clearance group (0 group), the basic group clearance for most applications is to meet the use requirements, and generally do not need to calculate. Need a large amount of interference with the bearing, inner and outer ring temperature difference is large or shaft deflection occasions, then should choose to use the clearance of the larger auxiliary group (3, 4 groups, etc.). When the load is lighter, the interference amount is smaller or inner and outer ring are used clearance fit, or request vibration noise is small, should choose to use the clearance smaller auxiliary group (2 groups).

For some special applications or important host, in order to be able to accurately control the working clearance, should be calculated according to the working conditions, in the fit, temperature rise, load and high-speed effect and other conditions of the change in clearance. In short, the clearance selection, for play bearing performance is very critical, should be according to the working conditions and use requirements of the bearing clearance for correct selection, which to a certain extent depends on the bearing design and application process accumulated in the actual experience.

Contact us for more details:

E-mail: emily@gainhui.com

Tel: +86-029-88692376

Mob/WhatsApp: +86-18710850036