Deep groove ball bearing 6228-M is a single-row design with a solid brass cage, bore diameter 140.0 mm, outside diameter 250.0 mm, and width 42.0 mm. Net mass is 9.28 kg. Limiting speed is rated at 4650 1/min, reference speed at 3600 1/min. Radial internal clearance corresponds to CN (Group N), the standard clearance group. The solid brass cage (M) provides stability at the stated speed values and suits continuous rotation under normal operating clearance. With CN internal clearance, the bearing runs without preload under standard temperature and fit conditions, making it suitable for radial loads with limited axial loads typical of single-row deep groove designs. No sealing or shielding is present, so lubrication and contamination protection must be provided externally.