This roller carries a solid, long stud with external thread and no eccentric collar, allowing direct mounting through a bore without additional fixing elements. The design is a double row, self-retaining angular contact ball bearing with a particularly thick-walled outer ring, ball and cage assembly, where axial guidance of the outer ring is provided by the balls themselves rather than by flanges. Outside diameter is 35.0 mm, width 49.2 mm, and net mass 0.14 kg. Sealing is achieved with lip seals on both sides (2RS), giving axial sealing action against contamination, but the unit has no relubrication facility, so it should be treated as sealed-for-life. A hexagonal socket is provided only on the flange side end face to aid assembly and tightening of the stud, which should be respected during installation to avoid loading the bearing through the wrong face.