STRUCTURE AND METHOD FOR LUBRICATING ROLLING BEARING WITH AIR-OIL

摘要

PROBLEM TO BE SOLVED: To provide a lubricating structure capable of supplying lubricating oil into a bearing even while the bearing is rotated at high speeds, without causing wind noises which may pose problems on air-oil lubrication. SOLUTION: A nozzle member 9 is provided for discharging air-oil toward the inside diameter surface 7a of the cage 7 of a rolling bearing 1. The inside diameter surface 7a of the cage 7 has a cross-sectional shape which increases in diameter at the center P of the cage width.