This deep groove ball bearing carries radial and moderate axial loads through a single row of balls running in a steel sheet metal cage (JN). Bore diameter is 90.0 mm, outside diameter 190.0 mm, width 43.0 mm, and net mass is 5.34 kg. The bearing is rated for a limiting speed of 4900 1/min and a reference speed of 5100 1/min, with radial internal clearance C3 (Group 3), which is wider than standard clearance. The C3 clearance compensates for thermal expansion during operation and shaft fit interference, making this bearing suitable where operating temperatures rise above ambient or where a tighter interference fit is required. The steel sheet metal cage design supports the specified speed ratings while keeping mass low relative to size. Dimensionally and constructionally, this bearing corresponds to SKF 6318/C3, NSK 6318C3, and NTN 6318C3.