The use of rolling bearings on machine tools is mainly used in the following three parts: main shaft, ball screw and general drive shaft.
As a basic accessory of a machine tool, the performance of the spindle bearing directly affects the speed, rotation accuracy, rigidity, anti-vibration cutting performance, noise, temperature rise and thermal deformation of the machine tool, and then affects the accuracy and surface quality of the machined parts. Therefore, high-performance machine tools must be equipped with high-performance bearings.
The accuracy of rolling bearings is generally divided into five grades: P0, P6, P5, P4 and P2. The accuracy of bearings used in precision machine tool spindles should be P5 and above. For high-speed and high-precision machines such as CNC machine tools and machining centers.