Carries radial loads through a single row of needle rollers without an inner ring, giving a compact cross-section relative to its load capacity. Outside diameter is 190.0 mm, net mass 2.325 kg, limiting speed 2900.0 1/min, reference speed 1910.0 1/min. The cage is standard and the bearing has no sealing. This needle roller bearing requires a hardened and ground shaft to act as the raceway, since there is no inner ring, and the shaft fit must be selected to maintain proper running accuracy. Without sealing, external protection or a shielded housing arrangement is needed to keep lubricant in and contaminants out. The standard cage guides the needle rollers evenly around the raceway, supporting steady operation up to the stated limiting speed, while the reference speed indicates the thermally safe continuous operating range under standard lubrication conditions.