| 摘要 |
PROBLEM TO BE SOLVED: To improve sinking performance by suppressing floating amount set by a conical roller and an inner ring.SOLUTION: A front bearing (a conical roller bearing) has an inner ring 32, an outer ring, a plurality of conical rollers 40, and a holder 50. The holder 50 has a claw portion 55 extending from a first annular part 51 opposite to a roller small diameter side end surface 44 which is an end surface on a small diameter side of the conical roller 40 to a small collar end surface 34a on an inner side in an axial direction of a small collar portion 34. The claw portion 55 contacts with the small collar end surface 34a to support the conical roller 40 while having a clearance 60 between the roller small diameter side end surface 44 and the small collar end surface 34a. |
