This deep groove ball bearing carries radial and moderate axial loads on a single row of balls, running with a bore of 45.0 mm, an outside diameter of 68.0 mm, and a width of 12.0 mm at a net mass of 0.13 kg. The design uses a steel sheet metal cage (JN) and is fitted with seals on both sides (2RSR), keeping internal lubricant in place and contaminants out. Radial internal clearance is CN (Group N), and the bearing is rated for a limiting speed of 5100.0 1/min. The narrow cross-section and sealed construction suit applications where space is limited and relubrication access is restricted, since the integrated seals allow the bearing to run on its factory-filled grease fill for extended service without external maintenance. Standard CN clearance makes it suitable for normal fit and temperature conditions without additional internal clearance selection. Dimensionally and constructionally interchangeable types are SKF 61909-2RS1, NSK 61909DDU, and NTN 61909LLU.