A fluid bearing includes hydrostatic pads formed in a surface and
positioned to exert a separating force, and a land formed on the surface
of the insert and configured to act as a bushing to allow rotation while
the first and second pads are pressurized at less than a hydrostatic
balance force. Pressurized fluid to the pads of the insert is controlled
to prevent operation in full hydrostatic mode. More particularly, a
separating force generated by surface force of the pads is controlled
such that the separating force does not exceed a force exerted on the
bearing. The fluid pressure is also controlled to keep the separating
force within a selected margin of the force exerted on the bearing, to
control wear of the bearing. Control of the separating force is achieved
by selectively pressurizing individual hydrostatic pads, thereby
effectively varying the active hydrostatic area of the bearing.