Grease for rolling bearing and grease-sealed rolling bearing
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United States of America Patent
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Aug 13, 2002
Issued Date -
N/A
app pub date -
Jun 19, 1997
filing date -
Aug 5, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a grease for a rolling bearing containing poly-.alpha.-olefin synthetic oil or diphenyl ether synthetic oil, a diurea thickening agent, and an organic antimony compound or an organic molybdenum compound. The present invention is also directed to a rolling bearing in which the grease for a rolling bearing is sealed. The organic antimony compound or the organic molybdenum compound reacts with a metal composing inner and outer bearing rings and a rolling element to form a compound film contributing to the reduction of the force in the tangential direction on a raceway surface of the bearing rings and a surface of the rolling element, thereby preventing an excessively large force in the tangential direction under high-speed rotation. This enables to lengthen the life of the rolling bearing used under particularly severe conditions such as high temperature, high-speed rotation and high road.
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