This track roller guides linear or curved motion along a rail through a particularly thick-walled outer ring, with a ball and cage assembly and an inner ring providing the rolling elements. Axial guidance of the outer ring is achieved by the balls themselves, eliminating the need for separate guiding shoulders. Bore diameter is 12.0 mm, outside diameter 35.0 mm, height 10.0 mm, and net mass is 0.047 kg. Sealing is designated 2RSR, with lip seals fitted on both sides providing combined axial and radial sealing action. The thick-walled outer ring gives the roller the load-carrying capacity needed to run directly against a track or cam surface without a separate housing. The double-lip sealing arrangement restricts ingress of contaminants and retains lubricant within the bearing, supporting continuous operation once initially greased. As a self-retaining single row ball bearing unit, it can be handled and mounted as a complete assembly, with the inner ring serving as the mounting interface on the supporting shaft or stud.