| abstract |
[PROBLEMS] To provide a grease composition capable of realizing an excellent low friction property even in the absence of molybdenum when used under severe sliding conditions such as high speed and high surface pressure, and a bearing in which this grease composition is sealed, and freely A joint and a linear motion device are provided. A grease-enclosed bearing 1 includes a grease composition 7 encapsulated at least around a rolling element 4, and the grease composition 7 includes a base oil, a thickener, and an additive. It is essential that the additive contains niobium or a compound containing niobium, and includes a dithiocarbamate such as methylenebis (dibutyldithiocarbamate), and a fatty acid metal salt such as calcium acetate. [Selection] Figure 1 |