The MR74-ZZ is a high-performance miniature ball bearing crafted for ultra-compact systems where frictionless rotation and foundational particulate defense are paramount. Fitted with dual non-contact pressed steel shields (ZZ), this 4x7x2.5 mm component creates a reliable safeguard against large dust particles while eliminating the drag associated with rubber seals. Its low-friction profile is specifically engineered for high-speed micro-motors, precision instruments, and robotics, ensuring internal raceways are kept clean and the specialized lubricant is securely housed for an extended operational lifespan.