| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rolling bearing and its unit having superior lubricating performance by preventing leakage of lubricant for a long period while keeping low torque, low outgassing and low dusting characteristics. <P>SOLUTION: In this rolling bearing for a hard disc drive actuator and its unit, comprising an inner ring 2, an outer ring 4 and a plurality of rolling elements 5, and further having a cage 7 made of synthetic resin, and provided with a plurality of bridge parts formed circularly as a whole in the circumferential direction to rotatably retain the plurality of rolling elements at equal intervals, between the inner ring and the outer ring, films of alkyl cyclopentane oil as the lubricant, are formed on a raceway surface 1 of the inner ring, a raceway surface 3 of the outer ring, and the rolling elements, grease including alkyl cyclopentane oil as its base oil, is sealed on the bridge parts, and an injection rate of the lubricant is 0.1-5 vol% of capacity of a bearing internal space. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
