The 6221 deep groove ball bearing features a 105 mm bore, 190 mm outside diameter, and 36 mm width, designed for high-speed, low-friction operation with a dynamic load capacity around 140 kN. It typically includes shields or seals such as 2Z or 2RS for protection against contaminants. Constructed from chrome steel (SAE52100), it supports radial and moderate axial loads, with speed ratings suitable for various industrial applications. The 6318 bearing variant has a 90 mm bore, 190 mm OD, and 43 mm width, with a pressed steel cage, dynamic load capacity of approximately 143,000 N, and operates efficiently up to 3600 rpm, offering durability and reduced noise in machinery. Both bearings are ideal for pumps, fans, and agricultural equipment requiring robust, reliable performance.