| 摘要 |
A rotary support device comprises an annular upper member (1) and an annular under member (2) which are so arranged that their inner or outer peripheral walls (10,20;11,21) overlap each other with a small clearance formed therebetween. The overlapping peripheral walls are bent toward each other to form a pair of retaining portions (13,23) which are rotatable relative to each other. A plurality of steel balls (3) held spaced apart equidistantly by a retainer (5) are rollably provided between the two members. |
