Carries radial loads with a single row of balls running in deep grooves, allowing the raceways to also take moderate axial loads in both directions. Bore diameter is 140.0 mm, outside diameter 250.0 mm, width 42.0 mm, net mass 7.7 kg. The bearing uses a steel sheet metal cage (JN) and runs at a limiting speed of 3600.0 1/min and a reference speed of 3600.0 1/min. Radial internal clearance falls in the CN (Group N) range, suitable for standard fits without preload issues. The bore type Z indicates the specific bore tolerance execution applied to the inner ring. With no seals or shields fitted, lubrication must be supplied externally and kept clean, and the open design allows heat dissipation at the stated speed ratings. Dimensional and constructional equivalents: SKF 6228, NSK 6228, NTN 6228.