This double row angular contact ball bearing carries the bore diameter of 30.0 mm, outside diameter of 42.0 mm and width of 10.0 mm, with a net mass of 0.037 kg. The two rows of balls set at an angle allow the bearing to take up combined radial and axial loads from both directions within a single unit. The cage is a TVH type made of plastic, keeping the design lightweight and running smoothly at the limiting speed of 8100 1/min. Both sides are fitted with seals, which keep grease inside and stop dirt and moisture from getting into the rolling contact area, so the bearing can run without added external protection. The double row arrangement gives stable guidance of the shaft under load from more than one direction at once, and the plastic cage keeps friction and heat generation low across the stated speed range.