Patent ID: 6208486
Filing Date: 2001-03-27
Classification: G11B

Abstract:
A disk drive comprising:a disk drive base;a spindle motor attached to the disk drive base, the spindle motor comprising:a motor base;a shaft coupled to the motor base;a rotary hub surrounding the shaft, the rotary hub comprising:a generally cylindrically-shaped hub wall;a hub flange comprising:an inner annular surface adjacent to the hub wall;an outer annular surface spaced-apart radially from the inner annular surface;a flange land portion integrally formed with the hub flange, the land portion positioned between the annular surfaces and defining a disk contact surface projecting above the annular surfaces, the disk contact surface being substantially centered on the hub flange;a first disk supported by the disk contact surface to form a clearance between the annular surfaces and the first disk;a disk clamp for applying a clamping force to the first disk, the clamping force being substantially centered on the disk contact surface;a second disk; andan annular disk spacer to separate the first disk from the second disk, the disk spacer comprising:a first spacer surface facing the first disk,a second spacer surface spaced-apart from the first spacer surface and facing the second disk, the first and second spacer surfaces each comprising:an inner annular spacer surface adjacent to the hub wall;an outer annular spacer surface spaced-apart radially from the inner annular spacer surface;a spacer land portion integrally formed with the disk spacer, the spacer land portion positioned between the annular spacer surfaces and defining a spacer-to-disk contact surface, the spacer-to-disk contact surface being substantially centered relative to the disk contact surface and projecting from the annular spacer surfaces to form a clearance between a respective disk and respective annular spacer surfaces.