| abstract |
[PROBLEMS] Even with a small amount of grease filled, for example, a dmN value, which is a product of a pitch circle diameter dm (mm) and a rotation speed N (rpm), can sufficiently cope with high-speed rotation of 1.7 million or more, and machine tools, etc. To provide high-speed rolling bearings that can be made more compact and reduce operating costs. An inner ring, an outer ring, a plurality of rolling elements, a cage having a chamfered edge, and a seal member that covers an opening of a gap between the inner and outer rings are provided. A high-speed rolling bearing 1 in which grease is sealed around a rolling element 4, wherein the grease is a urea grease containing a urea compound as a thickener and a non-urea grease containing no urea compound. The above urea compound is obtained by reacting a polyisocyanate component with a monoamine component containing at least one monoamine selected from an aliphatic monoamine and an alicyclic monoamine in an amount of 50 mol% or more based on the total monoamine. . [Selection] Figure 1 |