Patent ID: 7155807

Claim:
A method of concentrically aligning and attaching a disk to a hard disk drive, the method comprising: (a) providing a hub assembly with an axis of rotation and an axial end; (b) forming an axial feature in the axial end that is concentrically aligned with the axis of rotation; (c) providing a guide member with an outer surface and a protrusion, the protrusion being integrally formed with and extending directly from the guide member; (d) mounting a disk to the outer surface of the guide member such that the guide member is free of contact with an outer perimeter of the disk; (e) bringing the protrusion of the guide member into proximity and contact with the axial feature in the hub assembly such that the guide member is concentrically aligned with the hub assembly with respect to the axis of rotation exclusively via the protrusion, the protrusion being inserted into an opening a hub shaft, and the opening being a rounded concave dimple that is complementary in shape to the protrusion; (f) concentrically aligning the disk with the hub assembly based on the alignment between the guide member and the axial feature in step (e); (g) transferring the disk from the guide member to the hub assembly such that the disk is mounted to the hub assembly to form a disk pack assembly; and (h) after releasing the protrusion from the hub shaft and the guide member remaining free of contact with the outer perimeter of the disk, enclosing the hard disk drive with a base plate, cover, and seal assembly.