This roller guides along a track using a double row self-retaining angular contact ball bearing arrangement with a particularly thick-walled outer ring, ball and cage assembly, and a solid long roller stud with external thread. Outside diameter is 62.0 mm, width 70.9 mm, net mass 0.58 kg. Axial guidance of the outer ring is provided by the balls themselves, and the design has no eccentric collar. An assembly aid in the form of a hexagonal socket is machined into the flange-side end face only, allowing the stud to be tightened without additional tooling on that side. Sealing on both sides (2RS) is by lip seals with axial sealing action, keeping contaminants out of the raceway while running without a relubrication facility, so the bearing is intended for service life lubrication rather than periodic regreasing. The stud-mounted design and thick-walled outer ring suit applications where the roller carries load directly on its outer surface against a track, with axial position of the outer ring fixed by the internal ball arrangement rather than an external collar.