Patent ID: 6297934
Filing Date: 2001-10-02
Classification: G11B,Y10T

Abstract:
A head stack assembly comprising upper and lower head gimbal assemblies and an actuator arm having a bore and distally thereof a sloped distal face providing the arm with a relatively shorter upper arm face and a relatively longer lower arm face parallel to said upper arm face; said upper and lower head gimbal assemblies comprising respectively upper and lower mounting plates each having a central bore and a surrounding base, and upper and lower load beams attached to respective ones of said upper and lower mounting plates, said mounting plates being vertically registered and jointly staked to said arm at said bore by a tool passing through said bore from above, whereby said upper mounting plate base is supported less by said upper arm face and said lower mount plate is supported more by said lower arm face to simultaneously reduce upgramming in said upper load beam and increase upgramming in said lower load beam, whereby the net difference in upper and lower gram loads after said staking is minimized.