A bearing assembly includes a first race having an arcuate configuration and a first set of bearing elements. The first set of bearing elements is arranged to dynamically contact the first race and recirculate within the bearing assembly in a first direction. A second race has an arcuate configuration and is removably secured to the first race. A second set of bearing elements is arranged to dynamically contact the second race and recirculate within the bearing assembly in a second direction opposite the first direction.

According to one embodiment, an X-ray diagnostic apparatus includes a first arm, a second arm, a holding structure, an X-ray tube and an X-ray detector. The first arm rotates by a first rotating shaft and slides along a first arc-like slide axis relatively to the first rotating shaft. The second arm rotates by a second rotating shaft and slides along a second arc-like slide axis relatively to the second rotating shaft. The holding structure is connected with a first arm side and configured to hold the second arm. The X-ray tube and the X-ray detector are installed on the second arm.

According to one embodiment, an X-ray diagnostic apparatus includes a first arm, a second arm, a holding structure, an X-ray tube and an X-ray detector. The first arm rotates by a first rotating shaft and slides along a first arc-like slide axis relatively to the first rotating shaft. The second arm rotates by a second rotating shaft and slides along a second arc-like slide axis relatively to the second rotating shaft. The holding structure is connected with a first arm side and configured to hold the second arm. The X-ray tube and the X-ray detector are installed on the second arm.

The proposal is for a bearing of a lever (1), which is provided with a pivot arm (1A), in relation to a pressure piece (7), having a race (45) on the lever side, said race being curved in a partially cylindrical manner, a race (35) on the pressure-piece side, said race being curved in a partially cylindrical manner, rolling elements (37), which roll on both races (45, 35) and are grouped together in a bearing cage (36), and having a radial projection (34), which is fixed in terms of rotation relative to one race (35) and forms a stop which limits the mobility of the bearing cage (36) in one circumferential direction. In order to refine the bearing in terms of assembly, the bearing comprises a pocket (50) or opening, which is arranged in the other race (45) or extends partially into said race, said pocket or opening extending only over a part of the race width and, at the transition to the curvature plane (E) of the race (45), forming a stop edge (52) which limits the mobility of the bearing cage (36) in the other circumferential direction.

A curvilinear motion rolling guide unit is such that pipe members adapted to form return passages are disposed respectively at undercuts of wings of an arcuate casing, thereby reducing working costs. A slider has a casing and end caps fixed to respective opposite ends of the casing. Pipe members adapted to form return passages are disposed at the respective undercuts formed on the wings of the casing. Cover members have longitudinally extending grooves, respectively, for covering the pipe members. Fitting grooves formed at opposite ends of the grooves of the cover members are fitted to direction changing passages provided in the respective end caps, whereby the cover members are fixed to the end caps.

A pivot bearing supports a pivot lever of an application apparatus of a disc brake, wherein the pivot bearing has a curved bearing shell and a roller bearing cage which is pivotably guided thereon, wherein the roller bearing cage has at least one guiding vane which protrudes axially with respect to the pivot axis and which has at only one side an axially extending stop face for returning the roller member cage. A pivot lever arrangement and an application apparatus include the pivot bearing.