| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing device for a high speed rotating apparatus such as ball bearing type air turbine handpiece for dentistry to be excellent in biological safety (biological harmfulness), environmental maintainability (safety), heat resistance (autoctclav resisting), and durability. SOLUTION: In a rolling bearing device for a high speed rotary apparatus consisting of at least an outer ring, an inner ring, a rolling body, and a retainer 44, the retainer 44 is formed of a porous synthetic resin molded product partially having a pore part (a communicating pore part) 44b of communicating structure and, and lubrication treatment is applied on the retainer 44 by using lubricating oil consisting of vegetable non-drying oil. A porous synthetic resin molded product having a pore part of communicating structure is selected from a polyimide resin molded product, having a pore part having porosity being a specific volume of 5-20% of phenol resin molded product having a fiber layer, having porosity being a specific volume of 5-20%, as a pore part of communicating structure. |
