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How to choose rolling bearings

- Nov 21, 2017 -

The type of rolling bearing is varied, and the following factors can be taken into consideration when choosing.

A.The size, direction and nature of the load

Ball is suitable for withstanding light loads and roller bearings are suitable for heavy loads and impact loads. When the rolling bearing is subjected to a pure axial load, general selection of thrust bearings; when rolling bearings are subjected to pure radial loads, deep groove ball bearings or short cylindrical roller bearings are generally selected. When the rolling bearing is subjected to a pure radial load, a deep groove ball bearing, a angular contact ball bearing, Tapered roller bearings and self-aligning ball or self-aligning roller bearings; When the axial load is large, the angular contact ball bearing and tapered roller bearing with larger contact angle can be selected, or the centripetal bearing and thrust bearing are selected, which is especially suitable when the high axial load or the special requirements have a larger axial rigidity.

B.Allow speed

There is a big difference between the types of bearings. Under normal circumstances, the friction small, less calorific capacity of bearings, suitable for high speed. The rolling bearing should be designed to work under the condition that it is below its limit speed.


Bearing load, bearing rings and rolling body contact will produce elastic deformation, deformation and load proportional, the ratio determines the size of the bearing rigidity. The rigidity of the bearing can be improved by the preload of the bearing. In addition, the bearing stiffness can be improved by considering the combination and arrangement of the bearings in the bearing support design.

D.Tuning performance and installation error

After the bearing is loaded into the working position, it is often caused by manufacturing error. At this time, often due to the shaft to generate fishing and thermal expansion of the reasons, so that the bearing is subjected to excessive load, causing early damage. The automatic self-aligning bearing can overcome the defects caused by the installation error, thus it is suitable for this kind of use bearings.

E.Installation and Disassembly

Tapered roller bearings, needle bearings, etc., belong to the inner and outer ring separable bearing type (that is, the so-called separated type bearings), easy to install and disassemble.

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