Conning motor hub surface apparatus for hard disk drives

A disk mounting hub for mounting a disk on an axial hard disk spindle in which said disk has opposite parallel faces between a disk outside diameter and a coaxial disk inside diameter defining a central opening there through, as a product of the process comprising the steps:

• defining a rigid cylindrical hub body having a hub outside diameter disposed along a central axis;
• defining a cylindrical disk-mounting member disposed coaxial with said central axis at one end of said body;
• defining a coaxial member to extend proximally with an inside diameter from said one end of said body;
• sizing said member inside diameter to be received through said disk opening;
• defining a coaxial hub face extending between said hub outside diameter and said member inside diameter adjacent to said one end of said hub as a truncated conical section of revolution symmetrical about said axis, in which said conical surface is disposed at an oblique hub face angle Ω relative to said axis;
• and
• wherein said hub face angle Ω acts to minimize a disk conning angle D when said disk is clamped to said hub face.