How to choose the correct lathe rolling bearing?

1 Size, direction and nature of the load The ball bearing is suitable for withstanding light loads and the roller bearing is suitable for withstanding heavy loads and shock loads. When the rolling bearing is subjected to pure axial load, thrust bearing is generally used; when the rolling bearing is subjected to pure radial load, deep groove ball bearing or short cylindrical roller bearing is generally used; when the rolling bearing is subjected to pure radial load, there is still little For axial load, deep groove ball bearings, angular contact ball bearings, tapered roller bearings and self-aligning balls or spherical roller bearings are available. When the axial load is large, angular contacts with large contact angles are available. Ball bearings and tapered roller bearings, or the combination of radial and thrust bearings, are particularly suitable for very high axial loads or particularly large axial stiffness.

2 The allowable speed varies greatly depending on the type of bearing. In general, bearings with low friction and low heat generation are suitable for high speeds. The design is designed to work with rolling bearings below their limit speed.

3 When the rigid bearing is under load, the bearing ring and the rolling element will be elastically deformed at the contact point. The deformation amount is proportional to the load, and the ratio determines the rigidity of the bearing. Generally, the rigidity of the bearing can be improved by pre-tightening of the bearing; in addition, in the design of the bearing support, the bearing rigidity can be improved by considering the combination and arrangement of the bearings.

4 Self-aligning performance and installation error After the bearing is loaded into the working position, the installation and positioning are often poor due to manufacturing errors. At this time, the bearing often suffers from excessive load due to the degree of fishing and thermal expansion of the shaft, causing early damage. Self-aligning bearings can overcome the defects caused by installation errors and are suitable for such applications.

5 Mounting and dismounting tapered roller bearings, needle bearings, etc., belonging to the type of bearing that can be separated between the inner and outer rings (so-called separate bearings), easy to install and disassemble.

6 Marketability Even if it is a horizontal lathe bearing listed in the catalogue, there is no market for sales; on the contrary, some bearings not listed in the catalogue are produced in large quantities. Therefore, it should be clear whether the bearings used are readily available.