| 摘要 |
A magnetic disk drive capable of perfectly preventing dispersion of oil mists of a grease. The magnetic disk drive has a labyrinth seal disposed between a flange and a bushing of a spindle motor, thereby preventing a possible entry of oil mist of the grease applied to bearings into a sealed chamber. The magnetic disk drive further has a magnetic seal disposed between a rotor and a spindle shaft which are located axially opposite to the labyrinth seal relative to a stator. A combination of the labyrinth seal and the magnetic seal ensures improvement of the spindle motor while maintaining a sufficient sealing effect.
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