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Title:
LUBRICATING OIL COMPOSITION FOR FLUID DYNAMIC PRESSURE BEARING, AND MOTOR FOR HDD USING THE SAME
Document Type and Number:
Japanese Patent JP2013133470
Kind Code:
A
Abstract:

To provide a lubricating oil composition for fluid dynamic pressure bearings, and to provide a motor for HDDs using the same.

The lubricating oil composition for fluid dynamic pressure bearings includes 0.01-3.00 pts.wt. of an additive, and 100 pts.wt. of an ester-based base oil, and has a density at 15°C of not greater than 0.900 g/cm3, and a kinetic viscosity at 40°C of not greater than 9.50 cSt. Impact resistance and low temperature performance stability of a fluid dynamic pressure motor can be improved by manufacturing a motor for HDDs including the lubricating oil composition for fluid dynamic pressure bearings, having a low viscosity at operating temperature and a low evaporative loss, and improved in oxidation stability.


Inventors:
JUNG HA YONG
KIM HYUNG KYU
Application Number:
JP2012000084457
Publication Date:
July 08, 2013
Filing Date:
April 03, 2012
Export Citation:
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Assignee:
SAMSUNG ELECTRO MECH
International Classes:
C10M169/04; C10M105/32; C10M129/10; C10M135/10; C10M137/04; F16C17/10; H02K7/08; C10N20/00; C10N20/02; C10N30/00; C10N30/02; C10N30/06; C10N40/02
Domestic Patent References:
JP2002146374A2002-05-22
JP2010180970A2010-08-19
JP2009242547A2009-10-22
Foreign References:
WO2011125842A12011-10-13
WO2011125819A12011-10-13
WO2009096600A12009-08-06
Attorney, Agent or Firm:
Konobu Kato
Takafumi Oshima