Matrix 6900 CNC Internal High Speed Thread Grinding Machine CNC High Speed Internal thread grinding machine Specification : Max diameter of bore 250mm Min diameter of bore 25mm Max diameter of component 330mm Max length ground 200mm Diameter of grinding wheel 13 to 102mm Grinding wheel speeds lowest 42000rpm Max number of passes 48 Max depth of in feed 1.27mm Max side cut 2.54mm Machine wt 6500kgs