In one aspect, a fluid dynamic bearing system is provided. The system may
include a first member and a second member disposed for relative rotation
about an axis of rotation and having opposing substantially planar
surfaces defining an axial gap. A bearing region is disposed
circumferentially around the axis of rotation and a relatively large gap
region is disposed circumferentially around the bearing region, the large
gap region having an average gap distance greater than the bearing
region. The large gap region further includes at least one support pad
forming a localized narrow gap distance in the axial gap to provide
support between the opposed surfaces at a radial distance greater than
the bearing region. For example, the support pad may support the surfaces
against an externally applied force or moment that may tilt one member
relative to the other.