This track roller is a single row self-retaining ball bearing design with a particularly thick-walled outer ring, a ball and cage assembly, and an inner ring. Axial guidance of the outer ring is provided directly by the balls, eliminating the need for separate guiding elements. Bore diameter is 12.0 mm, outside diameter 30.0 mm, height 8.0 mm, and net mass is 0.026 kg. Sealing is provided by lip seals on both sides (2RSR), combining axial and radial sealing action. The thick-walled outer ring allows this track roller to run directly on a track or guide surface, with the ball set carrying both radial load and axial guidance forces from the outer ring. The double lip seal arrangement restricts lubricant loss and limits ingress of contaminants into the raceway area, supporting operation without frequent relubrication. Compact outer dimensions relative to bore size make this design suitable where direct rolling contact on a track surface is required within limited installation space.