This single row cylindrical roller bearing carries two ribs on the outer ring and one rib on the inner ring, giving the NJ configuration a semi-locating function that transmits axial loads in one direction only. Bore diameter is 35.0 mm, outside diameter 80.0 mm, width 31.0 mm, and the bearing weighs 0.795 kg. The M1 cage is machined, the internal design follows the E variant, radial internal clearance is C3 (Group 3), limiting speed reaches 16400 1/min, and reference speed is 6600 1/min. The semi-locating layout allows the bearing to accommodate axial displacement of the shaft in one direction while supporting radial loads through the roller set. The C3 clearance compensates for temperature rise and interference fits during operation, keeping the roller set from binding under load. As an open bearing without integrated seals, lubrication and contamination protection must be provided by the housing arrangement, and the machined M1 cage supports stable roller guidance at the stated speed ratings.