Overmolded motor hub

In a fluid dynamic bearing motor having:

• (i) a hydrodynamic bearing defined between an inner component and an outer component, wherein the inner component and the outer component are positioned for relative rotation;
• (ii) a data storage disc attached to one of the inner component and the outer component;
• and (iii) an actuator supporting a head proximate to the data storage disc for communicating with the data storage disc;
• a method of forming a critical tolerance fit component of the fluid dynamic bearing motor comprising:
• situating an insert in a predetermined orientation in a molding device, wherein the insert is a portion of the fluid dynamic bearing motor;
• introducing a raw material into the molding device;
• molding the raw material into a predetermined form as defined by a cavity, wherein the predetermined form is the critical tolerance fit component fixed to the insert, and wherein the cavity is at least defined by a surface of the insert and an inside surface of the molding device;
• and
• separating the insert and critical tolerance fit component from the molding device.

A fluid dynamic bearing motor comprising:

• a hydrodynamic bearing defined between an inner component and an outer component, wherein the inner component and the outer component are positioned for relative rotation;
• a metal portion of the fluid dynamic bearing motor including at least one of a first portion of a hub, a sleeve, and a disc clamp retainer;
• and
• a plastic portion of the fluid dynamic bearing motor, wherein the plastic portion of the fluid dynamic bearing motor is a critical tolerance fit component fixed to the metal portion of the fluid dynamic bearing motor, wherein the critical tolerance fit component comprises one of a second portion of a hub, a disc seating surface, and a disc locating surface, and wherein the second portion of the hub is situated adjacent to at least one of the first portion of the hub, a sleeve and a disc clamp retainer.