| 摘要 |
PROBLEM TO BE SOLVED: To provide a grease composition having excellent heat resistance, abrasion resistance and lubricity, and to provide a long-life rolling device having excellent seizure resistance and wear resistance. SOLUTION: A deep groove ball bearing is provided with an inner ring 1 having a trajectory surface 1a on the outer circumferential face, an outer ring 2 having a trajectory surface 2a facing the trajectory surface 1a on the inner circumferential face, a plurality of rolling elements 3 arranged freely rotationally between the both trajectory surfaces 1a and 2a, a cage 4 holding a plurality of rolling elements 3 between the inner ring 1 and the outer ring 2, and sealing devices 5 and 5 serving as seals for covering the opening of a clearance between the inner ring 1 and the outer ring 2. A clearance part, wherein the rolling elements 3 are arranged, between the inner ring 1 and the outer ring 2 is filled with the grease composition G for lubricating the deep groove ball bearing. The grease composition G includes a perfluoropolyether oil, a fluororesin and inorganic fine particles having primary particle size of 3-100 nm. COPYRIGHT: (C)2010,JPO&INPIT |
