Magnetic disk drive apparatus having disk clamp attachable using a single fastener

摘要

A magnetic disk drive apparatus including: a hub being rotatably supported by bearings mounted on a center fixed shaft and driving magnetic disks while having the magnetic disks attached to the outer circumferential surface thereof; a drive magnet fixedly secured to the hub; and a stator core fixed on a frame portion so as to confront the drive magnet. A clamp cap portion on a distal end portion of the hub is arranged for closing a center hole of the hub, and a tap hole is formed at the center of the clamp cap portion so that a disk clamp for clamping the magnetic disks can be screwed.