This track roller features a single row of balls running directly on a particularly thick-walled outer ring, with axial guidance of the outer ring provided by the balls themselves and a ball and cage assembly combined with an inner ring. Bore diameter is 17.0 mm, outside diameter 40.0 mm, height 10.0 mm, and net mass 0.06 kg. Sealing is provided on both sides by lip seals, designation 2RSR. The thick-walled outer ring gives the track roller its self-retaining, load-carrying rolling surface, allowing it to run directly against a mating track without a separate guide component. The 2RSR lip seals act with a radial sealing effect, keeping out contaminants while retaining the internal grease fill, which makes the bearing suitable for continuous rolling contact applications where the outer ring itself serves as the running surface.