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Non-symmetrical three-lobe bearing spindle technology: a drive technology to increase aerial density

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8 Author(s)
Yoshida, S. ; Mech. Eng. Res. Lab., Hitachi Ltd., Tsuchiura, Japan ; Kohno, T. ; Saegusa, S. ; Terayama, T.
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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

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Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 3 )