Patent ID: 6519116
Filing Date: 2003-02-11
Classification: F16C,G11B

Abstract:
An actuator arm assembly for use in a disk drive, the actuator arm assembly comprising:an actuator arm having an actuator bore disposed therethrough, the actuator arm being configured to pivot about an axis of rotation axially disposed within the actuator bore, the actuator bore having pivot sleeve contact areas; and a pivot cartridge concentrically received within the actuator bore, the pivot cartridge comprising: a pivot sleeve formed to exert compressive force radially from the axis of rotation against the actuator bore adjacent the pivot sleeve contact areas, the pivot sleeve being formed to locally deform radially relative to the axis of rotation adjacent the pivot sleeve contact areas; a bearing outer race concentrically received within and partially concentrically attached to the pivot sleeve; and a bearing gap formed between the bearing outer race and the pivot sleeve for inhibiting transfer of force between the pivot sleeve and the bearing outer race, thereby mitigating deformation of the bearing outer race in order to mitigate torque ripple on the actuator arm during rotation about the axis of rotation; wherein the actuator bore having an actuator bore notch formed therein between the pivot sleeve contact areas.