Patent ID: 7791833

Claim:
A spindle motor having a deep-drawn baseplate ( 1 ; 13 ) and an aperture ( 3 ) to receive and secure a hydrodynamic bearing system to rotatably support a rotor ( 7 ), characterized in that a bush ( 4 ; 14 ) to receive and secure the hydrodynamic bearing system is a separate part of the baseplate and is disposed and fixedly secured in the aperture ( 3 ) of the baseplate, wherein a bearing sleeve ( 5 ) is disposed within the bush, is firmly fixed to the bush, and is closed at one end by a counter plate which is in contact with the bearing sleeve, further characterized in that the lower end ( 12 ) of the bush ( 4 ) comprises a flange which rests on a corresponding surface of the baseplate, the corresponding surface of the baseplate being at least partially located on the underside of the baseplate, and in the region of connection to the bush ( 4 ) the baseplate ( 1 ) is slightly raised so that the baseplate ( 1 ) and the bush ( 4 ) form an even base when they are secured together, such that the bush is aligned at a right angle to the baseplate.