LR5003-2RS is a double row, self-retaining angular contact ball bearing 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, without a separate guiding flange. Bore diameter 17.0 mm, outside diameter 40.0 mm, height 14.0 mm, mass 0.07 kg. Both sides carry lip seals with combined axial and radial sealing action (2RS), retaining grease and keeping out dirt during continuous rolling contact. The self-retaining ball and cage assembly lets the bearing be mounted straight onto a shaft, while the thick-walled outer ring and ball-guided axial support suit it for use as a running track roller carrying loads on its outer surface.