1. load size, direction and nature: ball bearings suitable for light load to bear, roller bearings suitable for heavy load and shock load. When Rolling subject to pure axial load, generally used in the thrust bearing; when the rolling bearing by the pure radial load, generally used in deep groove ball bearings or cylindrical roller bearings; while at the same time by Rolling pure radial load, there is not When the axial load, the choice of deep groove ball bearings, angular contact ball bearings, tapered roller bearings and self-aligning ball or spherical roller bearings; when the axial load is large, the choice of the contact angle greater angular contact ball bearings and tapered roller bearings, or the choice of radial bearings and thrust bearings together, which is particularly adapted to large axial rigidity when appropriate in high axial loads or special requirements.
2. Permissible speed: Due to the different bearing types are very different. In general, friction is small, less heat bearings, suitable for high speed. Rolling design should strive to work under conditions of less than the speed limit.
3. Rigidity: when the bearing load, bearing rings and rolling elements contact points will be elastically deformed, the deformation is proportional to the load, which determines the ratio of the rigidity of the bearing size. Generally to improve the rigidity of the bearing by the bearing preload; In addition, in the bearing support design, consider the combination and arrangement of bearings may also improve the support stiffness of the bearing.
4. aligning performance and installation error: bearing into the working position, it is often due to a manufacturing error caused by poor installation and positioning. Often at this time due to thermal expansion of the shaft deflection and produce other reasons, so the bearing load is too large, causing early damage. Self-aligning bearing can overcome their own defects caused by installation errors, so it is suitable for such purpose bearings.
5. Installation and Removal: Tapered roller bearings, needle roller bearings and tapered roller bearings, bearing the type of inner and outer rings are separable (the so-called separation of bearings), easy installation and removal.