| 摘要 |
PROBLEM TO BE SOLVED: To provide a needle roller bearing with a double-row type cage which can prevent the early wear of the cage 3 and the generation of noise.SOLUTION: In a needle roller bearing 1 with a double-row cage, a pair of annular end flange parts 3a, 3a and a center annular inner flange part 3b are connected to each other by double-row columnar parts 3c, 3c, and double-row rollers 2 are held in pockets between the circumferentially-adjoining columnar parts 3c, 3c. By setting the dimension management of an outside diameter (&phgr;D2) of the inner flange part 3b and outside diameter (&phgr;D1) of end flange parts 3a, 3a at a relationship of &phgr;D2<&phgr;D1, since outside diameter faces of the end flange parts 3a at both ends of the cage 3 are guided to an inside diameter face of a housing 4 when the cage 3 is moved in a radial direction by loose clearance amounts of the rollers 2, a behavior of the cage 3 at rotation is stabilized, and early wear and the generation of noise can be suppressed. |
