Patent ID: 6856492

Claim:
A pivot bearing cartridge for use in a head stack assembly, the pivot bearing cartridge comprising: a pivot shaft including a shaft body and a shaft distal end; a cap disposed about the pivot shaft, the cap including a cap annular body and a cap closed end; a single ball bearing set in mechanical communication with the pivot shaft and the cap annular body; and a single central pivot element disposed between and in mechanical communication with the shaft distal end and the cap closed end for facilitating rotation of the cap relative to the pivot shaft; wherein the pivot shaft includes a shaft distal end insert attached to the pivot shaft adjacent the shaft distal end, the shaft distal end insert is formed to move along a longitudinal axis of the pivot shaft and biased against the central pivot element, the pivot shaft includes a spring in mechanical communication with the shaft body and the shaft distal end insert for biasing the shaft distal end insert against the central pivot element.