rotate about fixed shaft 11 a spindle motor according to the present invention can be manufactured with a rotating shaft and a stationary sleeve instead of a fixed shaft and a rotating sleeve in which case the rotating shaft would be affixed to the rotating unit and the stationary sleeve would be affixed to the stationary unit additionally the bearings in the bearing unit need not be hydrodynamic conical bearings other types of bearings can be used such as hydrodynamic thrust bearings hydrodynamic journal bearings pivot bearings or ball bearings in one aspect of the present invention bearing unit 1 is manufactured separately from the other components of the spindle motor it is then affixed to rotating unit 2 and to stationary unit 3 to form a spindle motor manufacturing bearing unit 1 as a separate component increases the ease with which the bearing can be handled and reduces the overall cost of manufacturing a spindle motor in another aspect of the present invention a plurality of interchangeable types of bearing units are manufactured with a variety of bearing properties such as stiffness energy consumption durability cost operating temperature range etc depending upon the particular application in which the spindle motor is to be used the appropriate bearing unit is selected and then.