A mounting interface for a spindle motor allows the optimization of the
spindle dynamics. The mounting interface provides a steadfast
relationship between a motor and a baseplate, wherein the mounting
interface includes at least three surface points forming a single plane
acting as a common boundary between the motor and the baseplate. The
three surface points may be pads, and the pads may be coupled to the
baseplate or to the mount flange. The three surface points provide
reduced contact area between the mount flange and the baseplate, and the
reduced contact area lowers the rigidity of the mount flange and the
resonant frequencies. The surface area of the pads and the material of
the pads is chosen to reduce acoustical noise. In addition, a damping
ring may be provided for dissipating distortion energy between the motor,
baseplate and/or mount flange.