BALL-AND-ROLLER BEARING FOR HARD DISK DRIVE

摘要

PROBLEM TO BE SOLVED: To provide a ball-and-roller bearing for HDD(hard disk drive) which evolves little outgas, has a low torque with a small torque fluctuation and is excellent in durability. SOLUTION: The ball-and-roller bearing for HDD, which has a plurality of rolling elements with the aid of retainers between the inner race and the outer race and is sealed with a grease, is characterized in that the above grease is such one that a base oil comprising a fluorine-based lubricating oil is blended in a ratio thereto with 5-20 wt.% of a poly(tetrafluoroethylene).