Carries radial loads and moderate axial loads in a single row of balls running in deep grooves, with bore of 50.0 mm, outside diameter of 90.0 mm and width of 20.0 mm. Net mass is 453.74 g. The bearing is fitted with a solid laminated fabric cage (TB) that allows a limiting speed of 10500.0 1/min and a reference speed of 8200.0 1/min. Radial internal clearance corresponds to CN (Group N), the standard clearance group. The solid fabric cage keeps ball spacing stable at higher speeds and reduces cage-induced vibration compared with pressed steel cages, which suits continuous rotation close to the stated limiting speed. Standard CN clearance gives normal running fit under typical shaft and housing tolerances without added preload. Bore type Z indicates a specific inner ring bore configuration as supplied by the manufacturer. As an open bearing without integrated seals or shields, it requires external lubrication and sealing arrangements suited to the operating conditions.