Patent ID: 8334241

Claim:
A rolling bearing comprising: an inner race; a rotary outer race; a plurality of rolling elements disposed between the inner race and the outer race; a retainer for retaining the rolling elements; and lubricating grease which comprises a base oil having a dynamic viscosity at 40° C. of 13-73 cSt, and a thickening agent of urea family, the lubricating grease being sealed in the bearing in an amount of not less than 20% of an entire spatial volume of an interior of the rolling bearing, and not more than 80% of a stationary spatial volume of the interior of the rolling bearing, wherein the entire spatial volume is an entire interior volume of the bearing minus a total volume of the rolling elements and the retainer, and wherein the stationary spatial volume is a portion of the entire spatial volume where neither the rolling elements nor the retainer passes while the bearing is rotating.