This track roller guides along a mating surface using a single row of balls running between a particularly thick-walled outer ring and an inner ring, with the ball and cage assembly providing axial guidance of the outer ring through the balls themselves. Bore diameter is 15.0 mm, outside diameter 40.0 mm, height 11.0 mm, and net mass is 0.07 kg. Sealing on both sides is provided by lip seals (2RSR), combining axial and radial sealing action. The thick-walled outer ring gives the track roller the load-bearing capacity needed for direct rolling contact on a track surface, while the self-retaining ball and cage assembly keeps the unit compact and simple to mount. The double-sided lip seal design keeps contaminants out and retains lubricant, making the bearing suitable for continuous rolling motion where the outer ring itself acts as the running surface.