We produce different series of electric spindle, motor spindles for milling machine, CNC grinding ,engraving and CNC ... are mainly applied in high speed inside and outside round grinding ,high speed drilling ,milling and carving , ... AD seriesare applied in the grinding below a speed of 40min/s of the grinding wheel.ADW,ADL ... ADQ are separately applied in grinding at a speed of 50min/s,60m/s and 70m/s. ...