This single row cylindrical roller bearing (NJ309-E-XL-TVP2-C4) has a bore of 45.0 mm, outside diameter of 100.0 mm, and width of 25.0 mm, with a net mass of 0.885 kg. The outer ring carries two ribs and the inner ring one rib, forming a semi-locating arrangement of type NJ that allows axial displacement in one direction while providing guidance in the other. The bearing uses a TVP2 cage and the E design, with radial internal clearance C4 (Group 4). Limiting speed is rated at 8500 1/min, reference speed at 6400 1/min. The semi-locating design and one-directional axial freedom make this bearing suitable for shaft arrangements where thermal expansion or slight axial movement must be accommodated without transmitting axial load in that direction. The C4 internal clearance, wider than standard, compensates for interference fits and operating temperature rise, keeping the bearing from running too tight under load. The polymer TVP2 cage supports smooth roller guidance at the rated speeds, while the open design requires external sealing and a separate lubrication supply, either grease or oil, matched to the application's speed and temperature conditions.