Deep groove ball bearing 16021 carries radial and moderate axial loads in a single-row, thin-section design with a 105.0 mm bore, 160.0 mm outside diameter, and 18.0 mm width, weighing 1.244 kg. The cage is made of steel sheet metal (JN design), and radial internal clearance corresponds to the CN (Group N) range. The bearing is rated for a limiting speed of 5900.0 1/min and a reference speed of 3950.0 1/min. The narrow cross-section keeps axial installation space low while the CN clearance suits standard operating conditions without preload. The steel sheet metal cage guides the balls with reduced friction and supports stable operation across the stated speed range. With no seals or shields fitted, relubrication and contamination protection must be provided externally, and mounting should account for the Z bore type as specified by the manufacturer.