ROLLING BEARING FOR WIND POWER GENERATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a rolling bearing for a wind power generation device, excellent in fretting resistance and that can prevent wear of a bearing raceway surface despite in the use under an environment exposed to repetition of swinging or the like.

SOLUTION: The rolling bearing 5 for the wind power generation device includes a grease composition containing a base oil, a thickening agent and an additive agent and confined inside a space which is formed by an inner ring 11 and an outer ring 12 and in which rolling elements 13 are disposed. The base oil is a synthetic oil having a kinematic viscosity of 300-600 mm2/s at 40°C. The additive agent contains at least one kind of a phosphite ester represented by formula (1) or (2). The content of the phosphite ester is 0.5-4 pts.wt. for 100 pts.wt. of the total of the base oil and the thickening agent.

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