| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grease composition which reduces load sensitivity of a running torque, maintains necessary properties for a wheel supporting rolling bearing unit, and can keep an excellent lubricated condition for an extended period of time, and to provide a wheel supporting rolling bearing unit encapsulating the grease composition. <P>SOLUTION: The grease composition includes: a base oil; a thickener; a rust inhibitor; and an anti-wear agent, wherein the base oil is a mineral oil, a synthetic oil or a mixture thereof, the mixing ratio (mass ratio) of the mineral oil and the synthetic oil is 0:100 to 20:80, the kinematic viscosity of the base oil at 40°C is 70 to 150 mm<SP POS="POST">2</SP>/s, and the pour point of the base oil is -40°C or less. A wheel support rolling bearing unit is filled with the grease composition. <P>COPYRIGHT: (C)2013,JPO&INPIT |
