GREASE COMPOSITION AND METHOD FOR PRODUCTION THEREOF, AND ROLLING BEARING HAVING THE GREASE COMPOSITION SEALED THEREIN

摘要

A grease composition which comprises a base oil, a thickener and an extreme-pressure additive having sulfur in its molecular structure, wherein the extreme-pressure additive is added in such an amount that the product of the amount of active sulfur (mgS/g) in said extreme-pressure additive and the amount (wt %) of said extreme-pressure additive relative to the whole grease composition is 3 to 13; a method for producing the above grease composition wherein the proportion of the extreme-pressure additive to be contained in said composition can be determined with ease; and a rolling bearing having the above grease composition sealed therein. The above grease composition can prevent the wear by friction on a lubricating face under a high load condition or in a state of occurrence of a sliding motion and thus is excellent in the long-term durability.