This four-point contact bearing carries axial loads in both directions on a single row of balls, with the separable ring design allowing mounting even under preload. Bore diameter is 40.0 mm, outside diameter 90.0 mm, width 23.0 mm, and net mass is 0.675 kg. The X-life design of the QJ308-XL-TVP raises load rating compared to standard execution. Limiting speed is 10200 1/min, reference speed 6200 1/min, and the bearing runs with a TVP polyamide cage. The single-row four-point contact geometry makes this bearing suitable where axial loads act from both sides but only one bearing position is available, such as combined radial-axial support on a single shaft location. The polyamide TVP cage reduces friction and mass compared to a machined cage, supporting the higher reference speed. As an open bearing without integrated seals, it requires external sealing and a defined lubrication scheme; correct axial clearance during mounting is essential given the separable ring construction.