| abstract |
A rolling bearing that can withstand high-speed rotation and use in a wide temperature range, and a grease composition sealed in the rolling bearing. A grease composition for a rolling bearing containing an ester oil in a proportion of 50% by mass or more, a base oil having a kinematic viscosity at 40 ° C. of 10 to 50 mm 2 / sec, and a diurea compound as a thickener, And the rolling bearing formed by enclosing the said grease composition for rolling bearings. [Selection] Figure 1 |