Spindle Motor

It is a motor that is designed to rotate at high speeds, most commonly used in applications such as CNC milling machines. Spindles rotate on the axis which receives input on movement from the CNC controller. Spindle is a very important part of a CNC machining center. The form of the spindle determines the speed and cutting force. A machine tool may have several spindles, the biggest one is called main spindle.

Shown below are three types spindle motors:

Air Cooled Spindle Motor
Water Cooled Spindle Motor
Square Spindle Motor