The NTN 6909LLUC3/5K is a genuine NTN deep groove ball bearing designed for reliable performance in a wide range of machinery. It features a 45 mm bore diameter, 68 mm outer diameter, and 12 mm width, making it suitable for applications requiring compact yet robust bearings. The 'LLU' designation indicates that the bearing is equipped with contact rubber seals on both sides, providing excellent protection against dust and moisture ingress, while retaining lubricant. The 'C3' internal clearance ensures proper operation under varying temperature conditions and allows for thermal expansion. This high-quality bearing is engineered for durability and efficiency.