This angular contact ball bearing guides a track along a particularly thick-walled outer ring, with axial guidance of the outer ring provided by the balls themselves. It is a double row, self-retaining design consisting of a ball and cage assembly and an inner ring, with a bore diameter of 30.0 mm, an outside diameter of 72.0 mm, and a height of 23.8 mm. Net mass is 0.51 kg. The cage (TVH) is made from glass fibre reinforced polyamide, and sealing shields (2Z) are fitted on both sides. The double row ball arrangement combined with the self-retaining outer ring construction allows this bearing to run directly as a track roller without a separate housing, taking the guidance loads through the balls in both axial directions. The polyamide cage keeps friction and mass low, while the shields on both sides protect the ball and cage assembly against contamination. A lubrication hole in the inner ring is available on request for relubrication in service.