This track roller guides linear or curved motion along a mating track through its particularly thick-walled outer ring, which is axially guided by the ball complement itself rather than a separate flange. The single row of balls runs in a self-retaining cage assembly between the outer ring and the inner ring, giving bore diameter 20.0 mm, outside diameter 52.0 mm, height 14.0 mm, and net mass 0.141 kg. Sealing is provided on both sides (2RSR), combining lip seals with axial and radial sealing action, which keeps contaminants out of the running surfaces and retains lubricant in the bearing. The self-retaining construction and integral axial guidance of the outer ring by the balls allow the roller to run directly on a track surface without needing a separate guide flange, making mounting and alignment straightforward.