holder cartridge during the extraction of the same from the rolling mill may reach values indicatively between 150 and 400 mm values which can negatively affect response times of the position control system of said capsules in order to continue to apply the same capsule control methods but with a considerably more dynamic system capable of rapidly and accurately reacting to sudden changes of pressure the servo valves in the control circuits are of the four way type instead of the three way type application_number US 201213490800 A description fig1 shows a rolling mill stand 100 of a multiple stand rolling milling each stand comprising in this embodiment three motorized working rollers 2 arranged in a roller holder cartridge 3 in each rolling mill stand 100 a hydraulic capsule 4 u2032 4 u2033 is provided for each roller or working roller 2 to regulate the radial position of the roller 2 with respect to the rolling axis of the rolling mill advantageously the hydraulic capsules are all with piston having a limited working stroke and are rigidly fixed to the outer structure of the rolling mill on which the reactions forces are relieved in each rolling mill stand 100 a hydraulic capsule 4 u2032 is arranged horizontally while the other two hydraulic capsules 4 u2033 are appropriately slanted with respect to the vertical axis preferably by an angle of u2212 30 u00b0 and shaped so as to provide an opening of the piston such.