An apparatus and a method are provided to facilitate building of a disk stack for inclusion in a magnetic disk drive. A spindle is provided which comprises first and second disk contacts. A mechanism is provided to bias an inner diameter of a stack of plural disks toward both the first disk contact and the second disk contact. The spindle may comprise one or a pair of lateral protrusions. The apex of each such spindle lateral protrusions may comprise one or both of the disk contacts. In addition, or alternatively, the inner diameter of a disk, to be inserted over the spindle, may comprise one or a pair of lateral protrusions. The apexes of such disk lateral protrusions may comprise one or both of the first disk contact and the second disk contact.

 
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