Development of High Performance Multi-Lobe Fluid Dynamic Bearings Using a Sintered Material

Hidekazu Tokushima

doi:10.4028/www.scientific.net/MSF.534-536.1437

Paper Titles

Structure Peculiarities of Nanocomposite Powder Fe40Al/Al₂O₃ Produced by MASHS
p.1421

Thermoelectric Properties of Nanostructured CoSb₃ Synthesized by Mechanical Alloying
p.1425

Amorphous Diamond for Generating Cold Cathode Fluorescence Light
p.1429

Development of Conductive and Anticorrosive Paint Dispersed with Carbon Particles for Metal Separators of PEFC
p.1433

Development of High Performance Multi-Lobe Fluid Dynamic Bearings Using a Sintered Material
p.1437

Displacement Properties of Newly Developed 3-Dimensional Piezoelectric Actuator at Various AC Frequencies
p.1441

Electroless Coating Process of Carbon Nano Fibers by Copper Metal
p.1445

Electromagnetic Properties of Silver Coated Iron Based Alloy Powders Prepared by Chemical Reduction Method
p.1449

Electrophoretic Deposition of Ni Nano-Particles for Self-Repairing of Heat Exchanger Tubes
p.1453

HomeMaterials Science ForumMaterials Science Forum Vols. 534-536Development of High Performance Multi-Lobe Fluid...

Development of High Performance Multi-Lobe Fluid Dynamic Bearings Using a Sintered Material

Abstract:

Recently, in spindle motors for hard disk drive (HDD) devices, fluid dynamic bearings (FDB) with herringbone grooves have come to be used instead of ball bearings due to the demand for high density recording of the devices, improvement in the speed of data transfer, and the quietness of the motor. In this study, a 5-lobe bearing with high bearing stiffness using a sintered material, as a new trial, was developed, and the bearing performance was examined by simulated calculations and experiments. As a result, it was clarified that the 5-lobe bearing had the required performance for practical use in the spindle motor for HDD by means of optimizing the bearing’s dimensions. In addition, bearing loss of the 5-lobe bearing is lower than that of the herringbone bearing, and the 5-lobe bearing showed clearly that it is effective in being used in the miniaturization of HDD spindle motors.