The 678-ZZ is a high-performance, thin-section miniature ball bearing designed for advanced mechanical systems where every millimeter of space is critical. Featuring dual-side metal shields (ZZ), this 8×12×3.5 mm component provides a streamlined solution for high-density layouts. The non-contact steel shields are engineered to repel dust and dry contaminants while maintaining an ultra-low friction profile. This allows the internal factory-set lubrication to operate efficiently, ensuring long-term reliability and smooth rotation in sensitive electronic and robotic assemblies.