Method of manufacturing magnetic disk device and magnetic disk device

A method of manufacturing a magnetic disk device including a spindle allowed to rotate in a state in which center axes of a plurality of magnetic disks having ends deviating from a geometrical plane with a center point as a reference are aligned, and a plurality of ramps being arranged at end positions of the plurality of magnetic disks, the method comprising:

• selecting the plurality of magnetic disks such that amounts of deviations of the ends from the geometrical plane with the center point as a reference fall within a predetermined range;
• preparing a plurality of shims having different thicknesses;
• selecting and installing a shim having a predetermined thickness in accordance with the amounts of deviations among the plurality of shims so as to adjust relative heights of the spindle and the plurality of ramps;
• and
• assembling the plurality of magnetic disks along an axial direction of the spindle in a state in which directions of deviations of the ends from the center point are aligned.