This is a single row angular contact ball bearing designed to carry combined radial and axial loads in one direction, with a defined contact angle between the raceways for stiff axial support. Bore diameter is 80.0 mm, outside diameter 170.0 mm, width 39.0 mm, and net mass is 4.09 kg. The bearing uses a solid brass cage (MP) and belongs to the X-life design, which provides raceway and rolling element geometry optimized for load distribution. Limiting speed is 6800 1/min, reference speed 4250 1/min. The solid brass cage guides the balls securely at higher speeds and under axial loading, keeping consistent ball spacing and reducing friction losses. Due to its single-direction contact angle, this bearing should be mounted in pairs or combined with another bearing when axial loads act in both directions. It is not sealed or pre-greased, so lubrication (grease or oil) and sealing must be provided externally according to the operating conditions and speed range.