| abstract |
There is provided a lubricant composition that reduces load sensitivity to running torque, maintains necessary performances for a wheel support rolling bearing unit and maintains a well lubricated condition for a long time, and a wheel support roller bearing unit with the lubricant composition charged. The lubricant composition contains base oil, thickener, rust inhibitor and antisoiling agent, and the base oil contains mineral oil, synthetic oil or mixed oil of the mineral oil and the synthetic oil, wherein a mixing ratio (mass ratio) of the mineral oil and the synthetic oil is 0: 100 to 20:80, a kinematic viscosity of the base oil at a temperature of 40 ° C is 70 to 150 mm 2 / s, and a pour point of the base oil is less than or equal to -40 ° C. The wheel support rolling bearing unit is filled with this lubricant composition. |