Correctly understanding the use location, use conditions and environmental conditions of spherical roller bearings in mechanical devices is the prerequisite for selecting suitable spherical roller bearings. To do this, it is necessary to obtain the following data and information:

(1) Function and structure of mechanical devices

(2) Where spherical roller bearings are used

(3) Loads on spherical roller bearings (magnitude and direction)

(4) Rotational speed

(5) Vibration and shock

(6) Spherical roller bearing temperature (ambient temperature, temperature rise)

(7) Ambient atmosphere (corrosiveness, cleanliness, lubricity)

Rigidity of spherical roller bearings

The rigidity of a spherical roller bearing is determined by the elastic deformation that occurs when it is under load. Generally, this deformation is very small and can be ignored. However, in some machines, such as machine tool spindle systems, the static and dynamic stiffness of the spherical roller bearing has a great influence on the characteristics of the system. Spherical roller bearings have higher rigidity than ball bearings. The rigidity of various bearings can be improved to varying degrees by properly "preloading".

Load of spherical roller bearing

The load size is often the determining factor in choosing the right bearing size. Roller bearings have a greater load capacity than ball bearings of the same overall dimensions. Generally, ball bearings are suitable for light or medium loads, while roller bearings are suitable for heavy loads.

For pure radial loads, deep groove ball bearings and cylindrical roller bearings can be used. For pure axial loads, thrust ball bearings and thrust cylindrical roller bearings can be used. When there are both radial and axial loads (combined loads), angular contact ball bearings or tapered roller bearings are generally selected. If the radial load is large and the axial load is small, deep groove ball bearings and cylindrical roller bearings with ribs on both the inner and outer rings can be selected. If there is also a large deformation of the shaft or housing and poor installation alignment, self-aligning ball bearings and spherical roller bearings can be selected. If the axial load is large and the radial load is small, a thrust angular contact ball bearing can be selected. If the four-point contact ball bearing also requires self-aligning performance, a thrust spherical roller bearing can be selected.