Adjustable gap for a fluid dynamic bearing

An apparatus comprising:

• a stationary sleeve;
• a hub operable to rotate with respect to the stationary sleeve;
• a gap forming component attached to the stationary sleeve, wherein the gap forming component extends radially, wherein
• the gap forming component forms radially extending gaps above and below the gap forming component, and the radially extending gaps above and below the gap forming component are parallel to each other, and
• the gap forming component is mechanically adjustable with respect to the stationary sleeve;
• and
• a lubricating fluid including a fluid meniscus positioned between the stationary sleeve and the hub, wherein the radially extending gaps above and below the gap forming component are free of the lubricating fluid.

An apparatus comprising:

• a stationary sleeve;
• a shaft operable to rotate with respect to the stationary sleeve;
• a hub operable to rotate with respect to the stationary sleeve in response to the shaft rotating;
• a mechanically adjustable gap forming component attached to the stationary sleeve, wherein
• the mechanically adjustable gap forming component forms a first gap on a first side of the mechanically adjustable gap forming component,
• the mechanically adjustable gap forming component forms a second gap on a second side of the mechanically adjustable gap forming component,
• the first gap and the second gap are parallel,
• the first gap is mechanically adjustable and dynamically adjustable, and
• the hub is further operable to dynamically adjust the first gap during rotation of the hub;
• and
• a lubricating fluid including a fluid meniscus positioned axially above the first gap and the second gap.