Mechanical design, generally determine the size of the shaft, and then select bearings 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 also can choose ball bearings).

If the radial space of the bearing installation part is limited, the bearing with smaller radial section height should be used. Such as needle roller bearings, some series of deep groove ball bearings, angular contact ball bearings, cylindrical or self-aligning roller bearings and thin wall bearings. If the axial space of the bearing installation part is limited, smaller width size bearings can be used.

bearing capacity than ball bearings with the same dimensions. Usually ball bearings are suitable for light or medium loads, roller bearings are suitable for bearing heavy loads.

* Pure radial load can use deep groove ball bearings, cylindrical roller bearings.

* Pure axial load can choose thrust ball bearing, thrust cylindrical roller bearing.

* When there is radial load and axial load (combined load), angular contact ball bearings or tapered roller bearings are generally used.

* If the radial load is large and the axial load is small, you can choose deep groove ball bearings and cylindrical roller bearings with inner and outer rings.

* If there is also large deformation of shaft or shell and poor installation of neutral, self-aligning ball bearing and self-aligning roller bearing can be selected.

* If the axial load is large and the radial load is small, you can choose thrust angular contact ball bearings and four-point contact ball bearings.

If self-aligning performance is also required, thrust self-aligning roller bearings can be selected.

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