| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball-and-roller bearing in which grease is hardly softened even when a PAG oil is mixed thereinto and which is excellent in low- temperature acoustic characteristics. SOLUTION: A deep-groove ball bearing 1 is filled with grease 7 which contains a base oil comprising at least either a synthetic hydrocarbon oil or a phenyl ether oil and having a kinematic viscosity at 40 deg.C of 15-90 mm2/see and a urea compound as a thickener. |
