| 摘要 |
PROBLEM TO BE SOLVED: To improve durability and reliability in a grease lubrication (grease encapsulation) rolling bearing supporting a rotation shaft of a motor of, in particular, an electric vehicle or a hybrid automobile.SOLUTION: In a grease lubrication rolling bearing made by encapsulating a grease composition, the grease composition comprises synthetic hydrocarbon oil as base oil and a urea compound as thickening agent, and apparent viscosity at -30°C is 30 Pa s or less and apparent at -40°C viscosity is 100 Pa s or less. Consequently, occurrence of abnormal sound at low temperature is suppressed. |
