Disk drive actuator having a radially stepped pivot bore
A head stack assembly (HSA) for a disk drive includes an actuator body having a cylindrical bore therethrough and an actuator arm extending therefrom. A head is attached to a distal end of the actuator arm. A pivot bearing cartridge is disposed within the cylindrical bore. A tolerance band is radially preloaded between an outer surface of the pivot bearing cartridge and an inner surface of the cylindrical bore. The cylindrical bore has a first diameter in a first region adjacent a first axial end, and a second diameter in a second region adjacent a second axial end. There is a radial step between the first and second regions. The first diameter is greater than the second diameter by at least 20 microns but no more than 100 microns.
Western Digital Technologies, Inc.
G G
G11B G11B
inventional inventional
Ian Hao Yu-Min Gregory
Griggs Zheng Lee Tran