External-rotor motor having a stationary bearing shaft

An external rotor motor (12), comprising

• an internal stator (52);
• a stationary support part (18) supporting the stator;
• and
• an external rotor (49), cooperating with the internal stator (52), and mounted on bearings for rotation with respect to the stator, said rotor having a casing part (14) on whose inner side (28) is arranged a permanent-magnet arrangement (50) that coacts with the internal stator (52),
• a first side of said casing part (14) being supported by means of a first rolling bearing (24) on said stationary support part (18), said first bearing having an outer race (26) slidably arranged adjacent an inner surface (28) of said casing part (14) and having an inner race (38) fixed to said stationary support part (18);
• a second side of said casing part (14) being supported by means of a second rolling bearing (40) on said stationary support part (18), said second bearing having an outer race (42) nonslidably secured adjacent the inner surface (28) of said casing part (14) and having an inner race (38) fixed to said stationary support part (18);
• and wherein
• the outside diameter of the outer race (26) of said first rolling bearing is dimensioned such that the stationary support part (18), along with said internal stator (52) and said first rolling bearing (24) mounted thereon, fits into said casing part (14) for purposes of assembling said motor.