| abstract |
To provide a rolling bearing for a machine tool that can effectively prevent peeling on a rolling surface due to water intrusion and has excellent long-term durability. A rolling bearing for a machine tool, wherein the rolling bearing 1 includes an inner ring 2 and an outer ring 3, and a plurality of rolling elements 4 interposed between the inner ring 2 and the outer ring 3. Seal members 6 for sealing the grease 7 are provided in the axial end openings 8a and 8b of the inner ring 2 and the outer ring 3, and the grease is a base grease composed of a non-aqueous base oil and a thickener. The water-resistant grease is formed by adding an additive containing at least a water dispersant, and the amount of the water dispersant is such that the saturated moisture content of the water-resistant grease is set to 30 to 60% by weight. [Selection] Figure 1 |