Electric machine - having a housing , - having a stator arranged in the housing , - having a rotor which is arranged in the stator and which is mounted on the housing so as to be rotatable about an axis of rotation , - wherein the rotor has a rotor shaft which is led out through a front wall of the housing , - wherein the rotor shaft has, on the outer side of the front wall , a drive element which serves for transmission of torque between the rotor and a drivetrain when the electric machine is incorporated into the drivetrain, - wherein the rotor shaft is rotatably mounted in a front bearing which is inserted into the front wall , - wherein the front bearing is, at an inner side of the front wall , sealed off with respect to an interior of the housing by way of a labyrinth seal , - wherein the labyrinth seal has a holding plate which is arranged on the inner side of the front wall and which has an annular collar inwardly protruding towards the rotor , - wherein the labyrinth seal has an annularly encircling flange which is formed on the rotor and which protrudes outwardly towards the front bearing , - wherein the flange axially overlaps the annular collar over a length (L), - wherein an outer annular gap (S1) is formed between the flange and the annular collar , characterized - in that the labyrinth seal has an annular groove which is arranged on the rotor shaft and which is radially open, - in that the annular collar axially overlaps the annular groove , - in that an inner annular gap (S2) is formed between a surface in which the annular groove is situated and the annular collar , - in that the flange axially overlaps the annular collar at a side averted from the annular groove , - in that the outer annular gap (S1) is at least twice as large as the inner annular gap (S2) and smaller than a wall thickness of the annular collar . - having a housing , - having a stator arranged in the housing , - having a rotor which is arranged in the stator and which is mounted on the housing so as to be rotatable about an axis of rotation , - wherein the rotor has a rotor shaft which is led out through a front wall of the housing , - wherein the rotor shaft has, on the outer side of the front wall , a drive element which serves for transmission of torque between the rotor and a drivetrain when the electric machine is incorporated into the drivetrain, - wherein the rotor shaft is rotatably mounted in a front bearing which is inserted into the front wall , - wherein the front bearing is, at an inner side of the front wall , sealed off with respect to an interior of the housing by way of a labyrinth seal , - wherein the labyrinth seal has a holding plate which is arranged on the inner side of the front wall and which has an annular collar inwardly protruding towards the rotor , - wherein the labyrinth seal has an annularly encircling flange which is formed on the rotor and which protrudes outwardly towards the front bearing , - wherein the flange axially overlaps the annular collar over a length (L), - wherein an outer annular gap (S1) is formed between the flange and the annular collar , - in that the labyrinth seal has an annular groove which is arranged on the rotor shaft and which is radially open, - in that the annular collar axially overlaps the annular groove , - in that an inner annular gap (S2) is formed between a surface in which the annular groove is situated and the annular collar , - in that the flange axially overlaps the annular collar at a side averted from the annular groove , - in that the outer annular gap (S1) is at least twice as large as the inner annular gap (S2) and smaller than a wall thickness of the annular collar . <EOS>