| 摘要 |
PROBLEM TO BE SOLVED: To provide a grease composition for a rolling bearing for outer ring rotation which satisfies all properties of high temperature durability, low temperature performance, and anti-rust properties.SOLUTION: A grease composition, which is included in a rolling bearing for outer ring rotation and used in an automotive electrical auxiliary machine, contains a base oil, a thickening agent, an anti-peeling additive, an antiwear additive, and an anti-rust agent. The base oil is a mixed oil having a mass ratio of a trimellitic acid ester oil to a synthetic hydrocarbon oil of from 70:30 to 90:10. The thickening agent is a diurea compound represented by formula (1), where Rrepresents a divalent aromatic hydrocarbon group having 6-15 carbon atoms, and Rrepresents a cyclohexyl group.SELECTED DRAWING: None |
