| 摘要 |
PROBLEM TO BE SOLVED: To provide an excellent bearing sound characteristic under low temperature and high temperature and to reduce the sound of a holder at starting under low temperature by providing an axial cylindrical surface on each pocket inner surface of the holder, and sealing a grease containing a thickener consisting of a specified material and an ester oil having a specified dynamick viscosity. SOLUTION: A holder 7 has an axial cylindrical surface 18 having the peripheral side opening edge of a holder 7 as the central axis on at least a part of the inner surface of each pocket 9. A grease is sealed which contains a thickener selected from a lithium salt of fatty acid containing no hydroxyl group, a lithium salt of fatty acid containing hydroxyl group and a mixture thereof and a base oil having a kinematic viscosity at about 40 deg.C of about 30-150 mm2/s and containing an ester oil as an essential component. The grease can easily penetrate into the clearance between the inner surface of the pocket 9 and a rolling body by use of the holder 7 having the axial cylindrical surface 18, and the grease excellent in durable performance at low temperature and high temperature is used. |
