Ball rolling component with latchable storage device

The rolling component (1) has a bearing portion (3) in which a ball (2) is rotatably supported. A bearing bolt (4) is provided with a recess (9), so that ball is extended partially from bearing bolt. An inner screw thread (12), outer screw thread and fitting seat are set to fasten bearing bolt. A screw thread axis (GA) and seat axis are passed through center of ball. The bearing portion is provided with bearing casing (5) having a hemispherical bearing pan (6) for abutment of ball. The ball is set with spring arms (7) and bearing casing is latched in recess.