| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller bearing for a constant-velocity joint port member or a center support member effectively preventing release caused by water penetration on a rolling surface and having an excellent long-term durability. SOLUTION: The roller bearing is useful for a support number for rotatably supporting a drive shaft at a body side. The roller bearing 1 is equipped with an inner ring 2, an outer ring 3, a plurality of rolling elements 4 laid between the inner ring 2 and the outer ring 3, grease 7 sealed in the circumferences of the rolling elements 4 and sealing members 6 disposed at both end opening parts 8a and 8b in the axial directions of the inner ring 2 and the outer wheel 3 and sealing the grease 7. The grease 7 is waterproof grease obtained by mixing base grease composed of a nonaqueous base oil and a thickening agent with an additive containing at least a water dispersant. The amount of the water dispersant mixed is an amount to set the saturated water amount of the waterproof grease at 30-60 wt.%. COPYRIGHT: (C)2008,JPO&INPIT |
