HEAT RESISTANT AND AT-COLD ABNORMAL NOISE PREVENTIVE GREASE COMPOSITION AND GREASE-SEALED ROLLER BEARING

摘要

PROBLEM TO BE SOLVED: To provide a heat resistant and at-cold abnormal noise preventive grease composition that is capable of surely preventing any occurrence of abnormal noise at cold and is capable of attaining prolonged life at a high temperature, and to provide a grease-sealed roller bearing using the same.;SOLUTION: The heat resistant and at-cold abnormal noise preventive grease composition contains a base oil, a thickening agent and an additive and has a consistency upon mixing of 300 or less at 25°C and a consistency before mixing of 200 or more at -20°C. The thickening agent comprises a urea compound represented by chemical formula 1, and the base oil comprises a synthetic hydrocarbon oil as an essential ingredient. The grease-sealed roller bearing comprises an inner ring, an outer ring and rolling elements interposed between the inner ring and the outer ring, wherein the above grease composition is sealed so as to surround the rolling elements. The grease-sealed roller bearing is used in auxiliary machines of automobile electrical equipment.;COPYRIGHT: (C)2006,JPO&NCIPI