The Nachi 6221 deep groove ball bearing is available in two main configurations to suit diverse industrial needs. The 6221 ZZC3 model features a 115 mm inner diameter, 190 mm outer diameter, and 36 mm width, offering robust performance for heavy-duty applications with a weight of approximately 3.86 kg. Alternatively, the standard 6221 open bearing provides a 105 mm bore, 190 mm OD, and 36 mm width, crafted from high-quality bearing steel for reliable operation and long service life. Both versions deliver excellent radial load capacity, precision engineering, and smooth rotation, making them ideal for demanding machinery, motors, and industrial equipment where durability and consistent performance are critical.