A micro-actuator for a head gimbal assembly includes a support frame
integrated with a suspension flexure of the head gimbal assembly, a
block, and a pair of PZT elements. The support frame includes a bottom
support, a top support adapted to support a slider of the head gimbal
assembly, and a pair of side arms that interconnect the bottom support
and the top support. The side arms extend vertically from respective
sides of the bottom support and the top support. The block is mounted to
the bottom support to provide resonance balance. Each PZT element is
mounted to a respective side arm of the support frame and a respective
side of the block. The PZT elements are excitable to cause selective
movement of the side arms.