Patent ID: 6727207
Filing Date: 2004-04-27
Classification: C10M,C10N,F16C

Abstract:
A rolling bearing comprising an inner race, an outer race and rolling elements, with a grease composition comprising, as the main components, a base oil, a thickener and at least one kind of a rust-preventive additive made from a naphthenate or a succinic acid derivative, wherein the naphthenate is a saturated monocyclic carboxylate represented by CnH2n-1COOM, a saturated polycyclic carboxylate represented by CnH2n-3COOM, a derivative thereof or a mixture thereof, wherein M represents a metal element, packed in a bearing space formed by at least the inner race, the outer race and the rolling elements, said at least one kind of a rust-preventive additive is present in an amount of 0.1 to 10% by weight based on the total amount of the grease composition, and wherein the thickener is selected from the group consisting of a urea compound, a urea-urethane compound, a urethane compound and mixtures thereof; said rolling bearing being adapted for use as electric parts for an automobile; and further, wherein said grease is effective in preventing flaking accompanying a white structure observed in electric accessories of an automobile.