SINTERED OIL-RETAINING BEARING

PROBLEM TO BE SOLVED: To obtain a sintered oil-retaining bearing in which a lubricant having a low viscosity, a small amount to be evaporated and a high film strength is impregnated, excellent in durability, capable of preventing the friction from increasing for a long period, and capable of improving electric power saving and long-term reliability by using a lubricant composition obtained by blending a specific carbodiimide compound therewith. SOLUTION: This sintered oil-retaining bearing is obtained by impregnating a lubricant composed of a lubricant composition obtained by blending (A) a carbodiimide compound of the formula (R1 and R2 are each an alkyl or an alkylphenyl), preferably in a proportion of 0.01-10 wt.% and further preferably (B) one or more kinds of amine-based, phenol-based, sulfur-based and carbamate- based antioxidants, preferably in a proportion of 0.01-10 wt.%, into a sintered bearing obtained by sintering a metal containing copper. A dibasic acid ester and/or a polyol ester is preferably blended as a base oil or a part of the base oil of the lubricant composition.