Electric motor having contact commutation and having an external stator and an internal, rotationally supported rotor, - wherein a magnet assembly having at least one permanent magnet is disposed fixedly at the rotor and a coil assembly having at least one electrical coil is disposed fixedly at the stator, - wherein the contact commutation has a contact element assembly, driven rotationally by the rotor, having at least one contact element and a slip ring assembly, disposed non-rotationally relatively to the stator and connected electrically with the coil assembly, having at least one slip ring, - wherein the slip ring assembly has several slip rings, - wherein in each case at least two such slip rings form a slip ring group and are connected electrically with one another via at least one such contact element, characterised in - that the respective slip ring group comprises only two slip rings, which define a slip ring pair, - that the respective slip ring pair comprises a first slip ring (31 1) and a second slip ring (31 2), - that the first slip ring (31 1) is connected with the coil assembly or with the associated coil strand, - that the second slip ring (31 2) in the circumferential direction is segmented and has at least one positive terminal segment, which is connected electrically with a positive terminal connection of the electric motor, which can be connected at a positive terminal of an electrical supply of the electric motor, at least one negative terminal segment which is connected electrically with a negative terminal connection of the electric motor, which can be connected at a negative terminal of the electrical supply, and at least two isolator segments, which in the circumferential direction are disposed in each case between a positive terminal segment and a negative terminal segment. - wherein a magnet assembly having at least one permanent magnet is disposed fixedly at the rotor and a coil assembly having at least one electrical coil is disposed fixedly at the stator, - wherein the contact commutation has a contact element assembly, driven rotationally by the rotor, having at least one contact element and a slip ring assembly, disposed non-rotationally relatively to the stator and connected electrically with the coil assembly, having at least one slip ring, - wherein the slip ring assembly has several slip rings, - wherein in each case at least two such slip rings form a slip ring group and are connected electrically with one another via at least one such contact element, - that the respective slip ring group comprises only two slip rings, which define a slip ring pair, - that the respective slip ring pair comprises a first slip ring (31 1) and a second slip ring (31 2), - that the first slip ring (31 1) is connected with the coil assembly or with the associated coil strand, - that the second slip ring (31 2) in the circumferential direction is segmented and has at least one positive terminal segment, which is connected electrically with a positive terminal connection of the electric motor, which can be connected at a positive terminal of an electrical supply of the electric motor, at least one negative terminal segment which is connected electrically with a negative terminal connection of the electric motor, which can be connected at a negative terminal of the electrical supply, and at least two isolator segments, which in the circumferential direction are disposed in each case between a positive terminal segment and a negative terminal segment.