| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing device with a long service life restrained from wear and seizure even when moisture and foreign matters intrude into a rolling bearing. SOLUTION: A steam force-feeder is provided with a housing 2, a rotating shaft 1 insert-fitted to the housing 2, and angular ball bearings 4, 5 interposed between the housing 2 and the rotating shaft 1 to rotatably support the housing 2 and the rotating shaft 1. An opening part 2a for communicating the inside and outside of the housing 2 is provided at the end part of the housing 2, and a ball 40 provided at the angular ball bearing 4 disposed in a closest position to the opening part 2a is formed of ceramic. |
