Automatic tool changer spindle is a kind of spindles which is made up with motor rotor and spindle. Its a component with the high-speed precision which can achieve automatic tool changer. The frequency conversion stepless speed regulation. Operating smoothly, with a good load feature and dust-prevent. Widely used in high speed CNC drilling and milling machine and engraving machine, etc. Supported by the precise rolling spindle, lubricated by the grease, cooled by the external circulating water. Match with the cylinder can achieve loose and draw knife automatically. This is a precision spindle. And produce by ourselves and have been certificate by China govenment.