The NTN 1R45X52X40 is a high-quality inner ring designed for use with needle roller bearings. Manufactured by NTN, a leading global producer of bearings, this inner ring provides a hardened and ground raceway for the needle rollers, ensuring optimal performance and extended bearing life. With an inner diameter of 45 mm, an outer diameter of 52 mm, and a width of 40 mm, it is engineered for precise fitment and reliable operation in various industrial and agricultural applications. This genuine NTN component guarantees durability and adherence to original equipment specifications.