Patent ID: 6466400
Filing Date: 2002-10-15
Classification: G11B

Abstract:
A magnetic disk drive comprising:a base; a spindle shaft fixed to said base; a coil mounted on said spindle shaft; a spindle hub rotatably mounted on said spindle shaft; a magnetic disk fixed to said spindle hub and having a plurality of tracks; a permanent magnet fixed to said spindle hub so as to define a gap between said coil and said permanent magnet; a magnetic head for reading/writing information from/to said magnetic disk; an actuator for moving said magnetic head across said tracks of said magnetic disk; a cover fixed to said base and having a hole at a position corresponding to said spindle shaft; a first metal washer placed on said cover at a portion around said hole and having an outer diameter larger than the diameter of said hole; a second metal washer for sandwiching said cover at said portion around said hole in cooperation with said first metal washer, said second metal washer having an outer diameter larger than the diameter of said hole; and a screw for securing said first and second metal washers to said spindle shaft.