PROBLEM TO BE SOLVED: To provide a rolling bearing that has both durability at high-temperature and cold-resistant noise property.;SOLUTION: A rolling bearing 1 used for electrical auxiliary machine for a vehicle includes: an inner race 2 and an outer race 3; a plurality of rolling elements 4 rolling between the inner race 2 and the outer race 3; and grease 6 sealed around the rolling elements 4. The grease 6 uses ether oil for base oil such as alkyl diphenyl ether oil, as a chief constituent. The rolling elements 4 are made of ceramic material. The rolling bearing 1 is a bearing free from a retainer for retaining the rolling elements 4.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
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