To create an electric motor, comprising a rotor and a stator, whereby the rotor is spherically supported, which motor has a high efficiency, it is proposed, that the rotor produces a magnetic field, that the surface of the rotor facing the stator has a spherical configuration, that the rotor and stator are adapted to each other so that a maximal magnetic attraction force which keeps the rotor on the spherical bearing is larger than the maximal axial counterforce.