Select bearing load is the most important factor to be considered. Load size and bearing the type, roller bearings are generally comparable with the same dimensions of ball bearing that heavy load, and full of rolling element bearing raceways off than corresponding bearings with cages may be subject to greater load. Ball bearings for light or medium duty applications. For heavy loads or large diameter shaft is concerned, are advised to use roller bearings.

Direction of the load

Select bearing also the load direction related. Pure radial load can use deep groove ball bearings or cylindrical roller bearings. Thrust ball bearings only adapted to receive the right amount of pure axial load. Thrust ball bearings can withstand axial load in one direction, two-way thrust ball bearings and angular contact thrust bearings are able to withstand axial load in both directions. When the bearing radial and axial joint load, generally applicable angular contact ball bearings or tapered roller bearings. Four point contact ball bearings and angular contact thrust ball bearings can withstand axial load in both directions for the advantage of the combined load.

The main features of the joint load bearing axial load capacity depends on the contact angle a, the greater the angle the more suitable for axial loads. Axial load factor Y, with the contact angle increases and decreases. Contact angle and axial load capacity of deep groove ball bearings with radial clearance related.

Angular contact ball bearings and tapered roller bearings can withstand axial load in one direction. Such as the need to change the load direction, it should be arranged in the opposite direction of the bearing to withstand axial load.

When combined load of axial load is large, the thrust bearings used to bear only axial load has nothing to do with the radial load. When using a suitable single row radial ball bearings or four-point contact ball bearings for axial loads, the outer ring and housing bore must have a radial clearance.

Moment loads

When the load bearing center deviation, appears overturning moment. Double row ball bearings, double-row deep groove or double row angular contact ball bearings can bear overturning moment. But it is best paired angular contact ball bearings or paired tapered roller bearings, available face to face type, back to back type better. It can also be cross-cylindrical roller or cross-tapered roller bearings.