Appliance and method for bending tests on tyre-changing machines

The appliance (1) for bending tests on tyre-changing machines or the like comprises: - a supporting structure (2); - first attachment means (3) associable in a removable way with grip and rotation means (C) for gripping and rotating a rim of a wheel of a tyre-changing machine (A) or the like; - second attachment means (4) associable in a removable way with a tool-holder arm (E) of said tyre-changing machine (A); - actuator means (5) placed between the supporting structure (2) and the second attachment means (4) and suitable for applying to said tool-holder arm (E) a tangential force (Ft) and/or an axial force (Fv) and/or a radial force (Fr); - bending measuring means (6) placed between the supporting structure (2) and the second attachment means (4) and suitable for measuring a tangential shift (St) and/or an axial shift (Sv) and/or a radial shift (Sr) of the tool-holder arm (E) with respect to the grip and rotation means (C).