| abstract |
The present invention provides a lubricating oil composition and a grease composition that are excellent in high-temperature and high-speed durability, can be used for a long time, and can prevent peeling on a rolling surface such as a rolling bearing due to hydrogen embrittlement. A grease-enclosed bearing 1 includes an inner ring 2 and an outer ring 3, and a plurality of rolling elements 4. A seal member 6 for sealing a grease composition 7 around the rolling elements is provided with the inner ring 2 and the outer ring. The grease composition 7 includes a base oil, a thickener, and an additive, and the additive includes carotenoids (astaxanthin, lycopene, β-carotene). , Capsaicin, capsanthin, etc.), organic sulfur compounds derived from natural products (eg, allicin, alliin, ajoene, isothiocyanate), saponins, isoflavones, glutathione, coumarin and the like. [Selection] Figure 1 |