The tool consists of two rotors (1, 2), each one formed by a rotary turning shaft(4, 4’) and at least one blade (5, 6) in the form of a helix, the turning shafts(4, 4’) being parallel to one another and parallel to the ground or lawnand separated by a distance that is smaller than the sum of the radii of the helixesof each one of the rotors (1, 2). The blade or blades (5, 6) of one of the rotors (1,2) have the form of a dextrogyrous helix and the blade or blades (6, 5) correspondingto the other rotor (2, 1) have a levogyrous helix. Also, one of the rotors (1, 2)consists of a drive rotor (1) and the other consists of a driven rotor (2). The derivedmachine incorporates at least one double-helix tool associated with at leastone of the wheels (14) of the machine.
