Carries radial loads with a low-friction, single-row ball arrangement built on the 618 series, bore 280.0 mm, outside diameter 350.0 mm, width 33.0 mm, net mass 6.107 kg. The steel sheet metal cage is coded JN, and the ring bore type is designated Z. Limiting speed is 2430.0 1/min, reference speed 1950.0 1/min, with radial internal clearance in group CN (Group N). Thanks to its narrow cross-section and standard CN clearance, this bearing suits applications requiring compact axial dimensions combined with reliable radial load support at moderate to high rotational speeds. The steel sheet metal cage keeps rolling element spacing stable under the specified speed limits, while the CN clearance provides the baseline internal fit for normal operating conditions without added preload or looseness. Dimensionally and constructionally, this bearing corresponds to SKF 61856, NSK 61856, and NTN 61856.