TYRE CHANGING MACHINE AND METHOD FOR USING A TYRE CHANGING MACHINE

A tyre changing machine (100) for mounting and demounting a tyre (P) to and from a corresponding rim (C) of a vehicle wheel (R) comprises a wheel-holder unit (200), a frame (400) and a bead breaker unit (300) including an abutment surface (S) and a bead breaking arm (301) articulated to the frame (400) to rotate about a second vertical axis (Y). The bead breaker unit (300) comprises: a bead breaker tool (302) mounted on the bead breaking arm (301), a bead breaker actuator (303), connected to the bead breaking arm (301) to move the bead breaker tool (302) towards and away from the abutment surface (S), and a driving element (304), mounted on the bead breaking arm (301) and configured to drive the bead breaker actuator (303), the driving element (304) alternately adopting an advanced position, a return position and an intermediate position.