| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a grease composition for angular ball bearing which has superior stripping life and bearing lubricating life for hub unit bearing, to provide an angular ball bearing and an automobile hub unit. <P>SOLUTION: The grease composition for an angular ball bearing includes a base oil having a dynamic viscosity at 40°C of 70 to 400 mm<SP>2</SP>/s and a diurea compound as a thickening agent represented by general formula (I): R<SP>1</SP>-NHCONH-R<SP>2</SP>-NHCONH-R<SP>3</SP>, wherein R<SP>2</SP>is a 6-15C bivalent aromatic hydrocarbon group, R<SP>1</SP>and R<SP>3</SP>present cyclohexyl group and 8-22C normal or branched alkyl group, and a proportion of the molar number of the 8-22C normal or branched alkyl group to the total molar number of the cyclohexyl group and 8-22C normal or branched alkyl group is 5 to 100%. The angular ball bearing which encloses the grease composition for angular ball bearing is also provided. Further, the automobile hub unit using the angular ball bearing is also provided. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
