(57) [summary] [purpose] without the bearing inner surface of the case give rise to local stress concentration of line contact due to the small diameter of the needle roller, It is possible to disperse the stress concentration and thus to obtain the universal joint of the maintenance-free, which can prolong the life of the bearing case. [Configuration] is an outer surface of the cross pin shaft portion 2 to the frustoconical, Circumferentially fitting the cage 4 of the frusto-conical needle roller 3 was disposed in the obliquely on the outside of the cross pin shaft portion 2 inserted in between the needle roller 3 and the bearing case 5 that is arranged in the cage 4, and tapering taper bush 6 to slidably contact with the needle roller 3 and the bearing case 5 of the diagonal arrangement has a truncated cone-shaped inner surface and a cylindrical outer surface of the tapered It is interposed.
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