The 6221 deep groove ball bearing features a 105mm bore, 190mm outside diameter, and 36mm width, designed for high-speed applications with low friction and durability. It offers a dynamic load capacity around 140 kN and is available in open or shielded (ZZ, 2RS) variants, typically made from chrome steel SAE52100 for enhanced wear resistance. The bearing supports speeds up to approximately 4800 rpm and operates efficiently under radial and axial loads. Its compact dimensions and robust construction make it suitable for industrial machinery, pumps, and fans requiring reliable, long-lasting performance. The 6318 bearing variant has a 90mm bore, 190mm OD, and 43mm width, with a dynamic load capacity up to 151 kN and a pressed steel cage for noise reduction and durability. Both bearings maintain operational stability across temperatures from -40 to 100 °C.