for the angular contact ball bearing grease composition and angular contact ball bearing with it

摘要

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.;SOLUTION: The grease composition for an angular ball bearing includes a base oil having a dynamic viscosity at 40°C of 70 to 400 mm²/s and a diurea compound as a thickening agent represented by general formula (I): R¹-NHCONH-R²-NHCONH-R³, wherein R² is a 6-15C bivalent aromatic hydrocarbon group, R¹ and R³ 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.;COPYRIGHT: (C)2010,JPO&INPIT