End-bearing equipped one-way clutch

In an end-bearing equipped one-way clutch comprising outer and inner rotary members arranged with a radial interval therebetween, rotatably relative to each other and concentrically with each other and having axially-extending inner and outer peripheral bearing surfaces respectively, torque-transmitting members arranged between the first and second rotary members for transmitting torques between the bearing surfaces, a combination of retainers maintaining the torque-transmitting members with equal angular intervals and having radially-extending annular flanges at one axial end portions thereof, and a combination of end bearings arranged respectively along both axial ends of the retainers maintaining the first and second rotary members in a concentric relation, the improvement wherein one of the end bearings, which is arranged on the side opposite to the flanges, is composed of a first cylindrical portion fit in the inner peripheral bearing surface of the outer rotary member, a second cylindrical portion fit on the outer peripheral bearing surface of the inner rotary member and a toroidal plate portion connecting the first and second cylindrical portions to each other, and a reinforcement means is formed at each of the first and second cylindrical portions so as to improve the rigidity against each load to be applied in the radial direction to the end bearing provided on the side opposite to the flanges.