The correct configuration of spherical roller bearings refers to the combination of bearing types and the arrangement of front and rear bearings. Different configurations determine the different load capacity, operating speed, stiffness, temperature rise and service life of the machine tool spindle, especially the stiffness and temperature. The influence of liter is more significant, so the spindle bearings should be reasonably configured according to the requirements of the machine tool's working characteristics. In terms of function and structure, spindle bearings can be divided into two categories: rolling bearings and sliding bearings.

The purpose of the running-in operation is to ensure that the rollers and raceways of the bearing have good contact conditions through running-in before the bearing is officially adjusted, so as to maintain good contact accuracy of the bearing and prevent the bearing from operating at high speed and speed at the beginning. Heavy load use causes damage to the rollers and raceways, thereby improving the life and accuracy of the bearing. Since the tapered roller bearing does not have a rolling contact, there is sliding between the roller end surface and the shoulder of the inner ring. If If the contact conditions are not good, it is easy to cause bite damage. Therefore, more attention should be paid to the running-in operation of this type of bearings.

The mechanical spindle refers to the axis on the machine tool that drives the workpiece or tool to rotate. The main shaft component usually consists of a main shaft, bearings and transmission parts (gears or pulleys). In machines, they are mainly used to support transmission parts such as gears and pulleys to transmit motion and torque, such as machine tool spindles; some are used to clamp workpieces, such as spindles. Except for machine tools whose main motion is linear motion, such as planers and broaching machines, most machine tools have spindle components. The movement accuracy and structural stiffness of the spindle components are important factors that determine the processing quality and cutting efficiency.