Title :
Non-symmetrical three-lobe bearing spindle technology: a drive technology to increase aerial density
Author :
Yoshida, Shinobu ; Kohno, Takashi ; Saegusa, Shozo ; Terayama, Takao ; Yoshida, Takashi ; Hirai, Hiromu ; Hamada, Yosuke ; Yamaguchi, Takashi
Author_Institution :
Mech. Eng. Res. Lab., Hitachi Ltd., Tsuchiura, Japan
fDate :
5/1/1996 12:00:00 AM
Abstract :
A fluid-film spindle for 2.5 inch hard disk drive is described that effectively reduces nonrepeatable runout to less than 0.05 μm, making it possible to increase track density. The spindle is used with a newly designed three-lobe bearing of which each lobe is asymmetrical. The influence of stiffness and temperature in a prototype spindle using this bearing are discussed and comparisons are made with a conventional ball-bearing spindle
Keywords :
hard discs; lubrication; magnetic fluids; magnetic recording; 2.5 inch; aerial density; fluid-film spindle; hard disk drive; magnetic fluid lubrication; nonrepeatable runout reduction; nonsymmetrical three-lobe bearing spindle technology; radial bearing surface; stiffness; temperature effect; track density; Ball bearings; Drives; Hard disks; Information retrieval; Laboratories; Mechanical engineering; Memory; Prototypes; Target tracking; Vibrations;
Journal_Title :
Magnetics, IEEE Transactions on
