Abstract: In an electrical drive mechanism, in particular for motor vehicles, having a commutator motor (14) disposed in a housing (10), which commutator motor (14) has a rotor shaft (17) with a commutator (22) non-rotatably supported on it and has a brush holder (30) affixed to the housing (10), and having a bearing (25) disposed in the vicinity of the commutator (22), which bearing has a bearing bush (34) that encloses the rotor shaft (17) with rotary play and a bearing seat (35) that contains the bearing bush (34), in order to achieve a simple embodiment for the bearing (25), a clamping member (37) is formed onto the brush holder (30) of one piece with it, which clamps the bearing bush (34) in a frictionally engaged, axial fashion in the bearing seat (35) formed in the housing (10) (FIG. 1).