Patent ID: 6919659

Claim:
An electric motor comprising: a stator having a sleeve, said sleeve having a cylindrical portion and a flange portion, said cylindrical portion and said flange portion of the sleeve being connected; a rotor assembly having a rotor shaft and at least one permanent magnet arranged on the rotor shaft, the rotor shaft being rotatably housed in the cylindrical portion and the flange portion of the sleeve; and a first bearing and a second bearing supporting said rotor shaft for rotation within said sleeve; wherein said first bearing is integrated into the cylindrical portion of said sleeve, wherein said second bearing is integrated into the flange portion of said sleeve, wherein an external dimension of the rotor assembly and an internal dimension of the stator are selected such that the rotor assembly is free to move in the axial direction while the rotor assembly is inserted into the stator, and wherein the rotor assembly is aligned within the stator in the magnetic center of the stator by self-centering magnetic forces.