Electric motor (50) comprising a housing, a rotor (1) and a
stator (16), wherein the rotor (1) has a shaft (66), the shaft (66) is mounted in the housing by a
fixed bearing (11) and a loose bearing (44), wherein the floating bearing (44) is arranged to be axially movable and the shaft (66) has shaft sections with different diameters, whereby the transitions of the shaft sections form shaft
diameter steps, wherein a spring element (41) is arranged axially between the floating bearing (44) and a housing part, in particular a bearing plate (42), wherein a ring of the floating bearing (44) is pressed by the spring element (41) against a shaft
diameter step, wherein the spring element (41) is pressed against an outer ring of the floating bearing (42) and an inner ring of the floating bearing (42) is pressed against the shaft
diameter step, wherein the spring element (41) is corrugated in the circumferential direction and is annular, wherein the spring element (41) forms a ring with a cloverleaf-shaped inner edge, in particular in axial plan view, and a corresponding outer edge, wherein the bearing plate (42) has, in the end face facing away from the
stator housing (52), two grooves running around the passage of the shaft (66), wherein an annular circumferential lip (39) is formed on the fan wheel (36) around the fastening area (37) provided for attachment to the shaft (66), and the lip (39) is directed towards the bearing plate (42) and projects out to form a non-contact seal, wherein the lip (39) projects into one of the grooves of the bearing plate (42), an air gap being provided between the lip (39) and the groove, wherein the groove is deeper than an
axial distance between a bearing shield-side end face of the floating bearing (44) and a
support surface of the spring element on the bearing shield (42), wherein the remaining opening of the passage of the bearing plate (42) is sealed by a shaft seal (30), wherein an axial receiving area of the shaft sealing ring (30) in the bearing plate (42) is longer in the axial direction than a depth of the grooves in the bearing plate (42), wherein a fan cover (35) is placed at least partially overlapping onto the bearing plate (42), wherein the fan cover (35) has the shape of an approximately square shell with rounded corners and a flat bottom, wherein L-shaped recesses are arranged in wall sections of the rounded corners on the
stator housing side, which are surrounded by further C-shaped recesses.