| 摘要 |
PROBLEM TO BE SOLVED: To supply lubricating oil directly to a track surface by forming a guide part for guiding in contact with the track surface of an inner or outer ring of a holder. SOLUTION: A bearing is composed of an inner ring 1 fitting on a rotary shaft, an outer ring 2 fixed to a housing, a plurality of balls 5 interposed between a track surface 3 of the inner ring 1 and a track surface 4 of the outer ring 2 and a holder to hold the balls 5 at equal intervals on circumference. Since a guide part 12 makes contact with the track surface 3 of the inner ring in the rotation of the bearing, lubricating powder of COPNA resin is rollingly supplied to the track surface 3 of the inner ring from the holder. The rollingly deposited film is not indirectly supplied through the ball 5, but direcly supplied from the holder 6 to the track surface 3 of the inner ring, so that the film is formed surely satisfactorily, and since the film is also rollingly supplied to the ball, the lubricating condition of the bearing can be markedly improved. |
