A disk drive apparatus includes a turntable having a boss at its one side surface
and a rotation center hole, and a rotary shaft inserted and fixed in the hole,
an inner circumferential surface of the hole being configured to have a fitting
portion near to another side surface of the turntable, a cylindrical clearance
near to the one side surface opening in an end of the boss, and a large diametrical
portion expanded outward in a radial direction of the hole from the clearance and
opening in the end and/or an outer circumferential surface of the boss, the shaft
inserted in the hole being fixed to the fitting portion by press fitting and to
the clearance and large diametrical portion by adhesive filled in the clearance
and large diametrical portion.