When mechanical design, generally determine the size of the shaft, and then choose the bearing according to the size of the shaft.Usually, the small shaft selection of ball bearings;Large shaft selection of cylindrical roller bearings, self-aligning roller bearings, tapered roller bearings (sometimes can also choose ball bearings).If the radial space of the bearing installation part is limited, the bearing with a smaller radial section height should be used.Such as needle roller bearings, some series of deep groove ball bearings, angular contact ball bearings, cylindrical roller or self-aligning roller bearings and thin-walled bearings.If the axial space of the bearing installation part is limited, a bearing with a smaller width can be used

Bearing load

Load size The load size is usually the determining factor in selecting the bearing size.Roller bearings have greater bearing capacity than ball bearings with the same overall dimensions.Usually ball bearings are suitable for light or medium load, roller bearings are suitable for bearing heavy load.

For pure radial load, deep groove ball bearing and cylindrical roller bearing can be selected.Thrust ball bearing and thrust cylindrical roller bearing can be used for pure axial load.When there is radial load and axial load (combined load), angular contact ball bearings or tapered roller bearings are generally selected.If the radial load is large and the axial load is small, the deep groove ball bearing and the cylindrical roller bearing with the inner and outer rings have the flange can be selected.If there is also a large deformation of the shaft or shell and the installation of neutral difference, self-aligning ball bearings and self-aligning roller bearings can be selected.If the axial load is large and the radial load is small, the thrust angular contact ball bearing can be selected. If the four-point contact ball bearing also requires the self-aligning performance, the thrust self-aligning roller bearing can be selected.

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