I use a torture with grid series MR are tertiary machines for crushing aggregates including limestone and asphalt, they can produce sand and already calibrated granulates. Machine equipped with a flange type rotor, mounted on grease lubricated bearings and protected by a series of labyrinth flanges, free torturels in manganese steel or chromium alloy, complete with internal armor in manganese steel plates fixed by conical bolts. This type of mill allows to obtain a high production capacity, a higher reduction ratio compared to three types of mills, if required a high percentage of fines in the granulometric curve of the output material and control of the maximum size of the material produced. The MR660 series mills are equipped with hydraulic opening.