With the development of industrial technology, automation has gradually become the main form of enterprise production and processing. In machining, the tool needs to be changed frequently due to different materials or shapes. The high speed motorized spindle has also been continuously developed from the traditional manual tool change to the ATC.
The rear end of the electric spindle is a cylinder structure. It uses air pressure to push the thimble against the middle pull rod so that the collet extends outward and the tool falls off, and then the device can automatically grab the tool using the shaft platform. The rear end of the spindle uses a solenoid valve to release the air and cut off the air so that the tool is clamped. This process is called automatic tool change.

