| 摘要 |
<P>PROBLEM TO BE SOLVED: To use a bearing under a higher speed condition as compared with conventional bearing by stabilizing rotation of a roller and a retainer in high speed rotation to generate low heat. <P>SOLUTION: A roller hold surface 30 of a pocket 2 is established in an inner diameter side of roller pitch diameter P by making pocket width dimension B in an inner diameter side narrower than pocket width dimension A in an outer diameter side. Also window width part edge of a column part 23 acts to prevent the roller 11 from coming off after the roller 11 is inserted in the pocket 22 from an outer diameter side by making the pocket width diameter A in the outer diameter side slightly smaller than diameter dimension Dw of the roller 11. Moreover, the window width part edge of the column part includes a roller introduction part 31 for inserting the roller 11 in the outer diameter side, a reference dimension part 32 for securing pocket width dimension A in the outer diameter side and an arc shape part 33 connecting the roller introduction part 31 and the reference dimension part 32. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
