| abstract |
(57) [Summary] (with correction) [PROBLEMS] To provide a sintered oil-impregnated bearing unit having excellent wear resistance and improved rust prevention performance and capable of withstanding high-speed rotation. A sintered oil-impregnated body having a hollow body having a hollow through which a shaft penetrates, the inner peripheral surface of which has a small-diameter portion forming a bearing surface and a slightly larger large-diameter portion. A bearing unit in which one or more bearings are fixed in a housing, wherein the lubricating oil to be impregnated in the sintered oil-impregnated bearing is a base oil containing phosphate ester as an anti-wear agent in an amount of 0.1 to 0.1%. A sintered oil-impregnated bearing unit which is a lubricating oil containing 10% by weight. Also, a spindle motor of an optical disc device comprising the sintered oil-impregnated bearing unit. |