| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the occurrence of wear and seizure due to slide between a roller and an inner ring large flange because of an amount of lubrication oil flowing through the inner side of a holder being low. SOLUTION: The position of a minimum inside diameter part 43a1 of the flange part of a holder 40 is set to a position outside the end face 11a on the small diameter side of an inner ring 10. Further, the inner opening area Si of the holder is increased. This constitution, when lubrication oil is fed from the side 11a on the small diameter side, increases a quantity Q2 flowing through the holder. Thus, even in a case of a feed amount of lubrication oil being low, sufficient lubrication oil is fed to a part (a slide part A) wherein the large flange part 12 of an inner ring and a roller 30 make surface contact with each other inside the holder, whereby excellent lubrication of the slide part A is performed and wear and seizure are effectively prevented from occurring.</p> |
