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 5.4 kg. Both sides are fitted with metal shields (2Z), protecting the raceway from coarse contamination while still allowing regreasing. Limiting speed is rated at 4150 1/min, reference speed at 5100 1/min. The bearing is produced with C3 radial internal clearance, which compensates for thermal expansion under load and shaft-to-housing fit tolerances. The shielded design keeps grease in place without full contact sealing, suiting installations where speed is prioritized over dust exclusion. Dimensionally and constructionally interchangeable with SKF 6318-2Z/C3, NSK 6318ZZC3, and NTN 6318ZZC3.