Designed for confined mechanical spaces demanding exact shaft positioning, the FR168-ZZ is a high-grade miniature deep groove ball bearing equipped with a specialized flanged outer ring. Featuring twin non-contact metal shields (ZZ), this component provides outstanding protection against environmental contaminants while securely retaining its premium factory grease. Because these steel shields do not rub against the inner race, the FR168-ZZ guarantees ultra-low starting torque and frictionless, high-velocity rotation. This makes it an indispensable asset for 1/4-inch shaft applications where space is at a premium, including advanced RC models, medical handpieces, and intricate robotic assemblies.