Machine for regeneration of pneumatic tyres

A machine for regeneration of pneumatic tires comprising a holding device for axial locking of the pneumatic tire to be regenerated in the direction of a revolving axis of the pneumatic tire which provides an stationary member and a movable member in said direction, a work rasp mounted on a spindle, inflation means of the pneumatic tire and a discharge cochlea, characterized in that the machine further comprises a roughing miller suitable to prepare the pneumatic tire to a subsequent finishing by means of the rasp, said miller being mounted on the same spindle of said rasp and after it, and constituted of a monoblock with discharge channels for chips produced by inserts with a curved profile providing a plurality of planar blades joined by discharge grooves of the chips produced, wherein the movable member is integral with a rod partially internal to an oil-pressure cylinder controlled by an oil-pressure circuit, and wherein said oil-pressure circuit comprises a couple of lock solenoid valves for the oil flux from and towards respective chambers defined internally of the cylinder by a displaceable head integral with the rod, a choking solenoid valve for the oil flux for the adjustment of the displacement direction and speed of the rod, at least one pressurizing solenoid valve, a pump, a tank, and measuring and safety means.