In general, the structure of the spindle can be divided into six parts, which are the main shaft, spindle bearings, the unit housing of the spindle, the motor without the shell, the module for the drive and the device for cooling, etc. Of the rotor assembly method is pressed and the rotor and the spindle is connected into a unified whole. The spindle of the spindle is assembled by a front bearing and a rear bearing, and the stator of the motor is mounted in the housing of the spindle, but it is necessary to use a cooling jacket to secure the stator first. And the change in spindle speed is determined by its drive module. If the temperature inside the spindle is too high, the cooling device inside the spindle will limit its temperature to protect the spindle from damage. The motor of the spindle is a direct device in its spindle device, and when the motor spindle is operating, the motor operates at a very fast speed, so that a lot of heat is generated after a long period of time on the spindle. , Then the spindle surface temperature will rise, if the temperature is too high, it will directly affect the normal operation of the spindle.
 
Therefore, in order to ensure that the temperature of the motor spindle within its acceptable range, before use, according to the actual use of the need to determine the appropriate rated temperature, and if the motor spindle surface temperature is too high, the machine will automatically use some Way to reduce the temperature, for example, in general, it can be forced to reduce the temperature of the oil used for circulation, with the electric spindle temperature will soon be reduced.
 
The choice for the spindle spindle is also very critical, a direct impact on the spindle life and performance!