Rolling bearing
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United States of America Patent
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May 27, 2003
Grant Date -
Jan 16, 2003
app pub date -
Dec 3, 2001
filing date -
Dec 4, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A rolling bearing to exhibit outstanding initial (cage) acoustic characteristics at the start of operation under a low temperature atmosphere, suppress fretting damages (abrasions) and reduce bearing torque by making the radius of curvature of the cross-sectional shape of the inner raceway and the radius of curvature of the cross-sectional shape of the outer raceway equal to 51.0% to smaller than 60.0% of the diameter of the rolling element, and packing a grease composition comprising a base oil that is a mixture of a lubricant containing a polar group in its molecular structure and a non-polar lubricant and a metallic soap-based thickener containing a long-fiber material with a major axis part length of at least 3 .mu.m.
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