| 摘要 |
PROBLEM TO BE SOLVED: To provide a retainer unit capable of supplying a lubricant even in initial motion after being left for a long time, and improving seizure resistance.SOLUTION: An oil groove 11 along a circumferential direction, is formed on an inner end face of a large diameter-side annular portion opposed to a large diameter-side end face of a conical roller of a retainer unit including: a retainer 2 having a smaller diameter-side annular portion 7, the large diameter-side annular portion 8 disposed while axially separating from the small diameter-side annular portion, and a plurality of pillar portions 9 connecting the small diameter-side annular portion and the larger diameter-side annular portion; and the conical roller accommodated in a pocket 10 of the retainer, and a circumferential length of the oil groove is a length to be overlapped to the large diameter-side end face of the conical roller in the circumferential direction. |
