Grease composition for rolling bearing and rolling bearing
AssigneeNsk Ltd.
InventorsKazunori Nakagawa, Yuujiro Toda, Koichi Hachiya
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Abstract
The present invention provides: a grease composition for rolling bearings which includes a base oil and a diurea compound incorporated therein as a thickener, the base oil including at least one oil selected from trimethylolpropane fatty acid ester oils and pentaerythritol fatty acid esters or a mixed oil which includes the at least one oil and another lubricating oil and having a kinematic viscosity at 40° C. of 19-35 mm2/s and an amount of evaporation through 250-hour holding at 150° C. of 10-15% by mass; and a rolling bearing packed with the grease composition.
Claims4
A grease composition for rolling bearings, comprising:
- a base oil;
- and a diurea compound incorporated therein as a thickener, the base oil comprising at least one oil selected from the group consisting of trimethylolpropane fatty acid ester oils and pentaerythritol fatty acid esters or a mixed oil which comprises the at least one oil and another lubricating oil and having a kinematic viscosity at 40° C. of 19-35 mm2/s and an amount of evaporation through 250-hour holding at 150° C. of 10-15 % by mass.
Dependencies are inferred from the claim text.