Carries radial loads with a single row of balls running between raceways sized for a 180.0 mm bore, 280.0 mm outside diameter and 31.0 mm width, giving a net mass of 6.92 kg. The steel sheet metal cage (JN) guides the ball set, and the bearing is rated for a limiting speed of 3350.0 1/min with a reference speed of 2950.0 1/min. Radial internal clearance falls in the CN (Group N) range. The narrow cross-section relative to the bore suits applications where axial space is restricted while radial load capacity from the deep groove design is still required. CN clearance corresponds to normal running fit, appropriate where no special preload or looseness is specified. The open design (bore type Z) requires separate sealing and lubrication at the housing, so grease or oil supply must be arranged externally, and the sheet metal cage keeps ball spacing stable at the stated speed ratings.