| 摘要 |
PROBLEM TO BE SOLVED: To improve the acoustic characteristic and lubricity of a small-diameter bearing lubricated with grease. SOLUTION: Surface roughnesses in a raceway surface 2a of an outer ring 2, a raceway surface 1a of an inner ring 1, and a ball 3 are not more than 0.015μm in the arithmetic mean roughness. Grease contains silica particle which keeps the surface hydrophobic, and the mean particle diameter of a primary particle is not more than 100 nm at the rate of 0.01 mass% to 10.0 mass%, and having a mixture consistency of 280 to 350 and base oil kinematic viscosity at 40°C of 20 mm<SP>2</SP>/s to 200 mm<SP>2</SP>/s is used. COPYRIGHT: (C)2007,JPO&INPIT
|
