| abstract |
PROBLEM TO BE SOLVED: To suppress the occurrence of white structure peeling and corrosion even when water is mixed, and to keep a good lubrication for a long time, and to seal the grease composition, and to have water resistance Provide various rolling bearings for wind power generators, construction machines or steel rolling mills. A carboxylic acid system comprising a base oil consisting of at least one lubricating oil selected from mineral oil and synthetic oil, a kinematic viscosity at 40 ° C. of 70 to 250 mm 2 / s, and a thickener. Grease composition containing at least one selected from rust preventive additive, carboxylate-based rust preventive additive and ester-based rust preventive additive in a proportion of 0.1 to 20% by mass of the total amount of grease, and said grease composition Rolling bearings for wind power generators, construction machinery, or steel rolling mills that enclose objects. [Selection] Figure 1 |