| 摘要 |
<p>Disclosed is a needle bearing comprising a retainer which is contractible or extendible in the circumferential direction. The needle bearing makes it possible to prevent plastic deformation, and both sufficient strength against axial twisting and a sufficient amount of deformation can be ensured. A shell-shaped needle bearing (10) wherein a plurality of elastic deformation parts (17) allowing contraction in the circumferential direction are provided on a retainer (13) in the circumferential direction, the elastic deformation parts (17) being formed symmetrically about an intermediate part (C) in the axial direction.</p> |
