Engineered for internal mechanical assemblies where external sealing is provided by the housing, the 6921 Open is a high-performance thin-section radial ball bearing. Completely unshielded and unsealed, this open-type configuration allows for unrestricted flow of fluid lubricants directly into the rolling elements. Because there are no physical barriers or rubbing seals, the 6921 Open achieves absolute zero shield-induced friction, ensuring optimal thermal dissipation and maximum rotational efficiency. It is the ideal component for heavy-duty 105mm shaft applications enclosed in oil bath environments, such as industrial transmissions, large centrifugal pumps, and enclosed machine tool spindles.

Engineered for enclosed mechanical environments where external lubrication is continuously supplied, the 6217 Open is a premium single-row deep groove ball bearing designed without shields or seals. This "open" architecture allows for the free, unrestricted circulation of oil or grease directly through the rolling elements, making it the superior choice for oil-bath lubrication systems. Featuring standardized metric dimensions of an 85 mm bore, 150 mm outer diameter, and 28 mm width, this bearing delivers exceptionally smooth, high-speed rotation and robust load-bearing capabilities for internal machinery components.