The double row angular contact ball bearing for recirculating ball-screws has been especially developed to support recirculating ball-screws. It offers high precision and stiffness, a low coefficient of friction, high rotational speed during quick positional shifts. Typically made up of an outer ring in one piece, an inner ring in two pieces, ball rows and seals it is a bi-directional bearing with a 60° pressure angle and an O-configuration setup. It can support radial and axial loads with an axial load from both sides; it must be preloaded with a locknut during the assembly.