The hydrodynamic bearing assembly according to claim 1, wherein a partial wall thickness of the bearing sleeve portion is less than 0.5 mm.ħ. The hydrodynamic bearing assembly according to claim 1, wherein a wall thickness of the bearing sleeve portion is less than 0.5 mm.Ħ. The hydrodynamic bearing assembly according to claim 1, wherein a partial wall thickness of the bearing sleeve portion is less than 1.0 mm.ĥ. The hydrodynamic bearing assembly according to claim 1, wherein a wall thickness of the bearing sleeve portion is less than 1.0 mm.Ĥ. The hydrodynamic bearing assembly according to claim 1, wherein said thrust bearing is a pivot bearing.ģ. A hydrodynamic bearing assembly comprising: a rotational shaft a stationary flange including a bearing sleeve portion encompassing the rotational shaft with a small radial clearance such that an inner surface of the bearing sleeve portion is located immediately adjacently to an outer surface of the rotational shaft, said bearing sleeve portion having a partially enclosed end and an open end a radial bearing formed between the inner surface of the bearing sleeve portion and the outer surface of the rotational shaft, the radial bearing comprising a plurality of hydrodynamic pressure generating grooves formed on at least one of the outer surface of the rotational shaft and the inner surface of the bearing sleeve portion a counter plate enclosing the open end of the bearing sleeve portion and a thrust bearing formed between an upper surface of the counter plate and a bottom surface of the rotational shaft, wherein the bearing sleeve portion is constructed as a single, seamless and integral component of the stationary flange, wherein an upward movement of the rotational shaft is prevented by the partially enclosed end of the bearing sleeve portion and wherein no part of the bearing sleeve portion is located below a bottom surface of the stationary flange.Ģ. Hydrodynamic spindle motor having distributed windingsĭynamic pressure type fluid bearing deviceġ. Hydrodynamic bearing assembly with single sided grooved counterplace Rotating polygon mirror driving apparatus Hydrodynamic bearing for use in an electric motor and an electric motor having the hydrodynamic bearingĬonic fluid bearing and head drum and spindle motor each including the sameĬonical bearing apparatus having a dynamic pressure generating groove Hydraulic dynamic bearing and spindle motor utilizing hydraulic dynamic bearing Dynamic pressure bearing and spindle motor with the bearing
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