20 Pcs MR52 MR62 3x6x2.5mm MR128-ZZ Double Shielded Miniature Deep Groove Ball Bearings

This set comes with 20 pieces of miniature deep groove ball bearings, including models MR52, MR62 (size 3×6×2.5mm) and MR128-ZZ, all designed with double metal shields for excellent protection.Made of high-quality bearing steel, these bearings have high hardness, superior wear resistance and stable mechanical properties.The double shield (ZZ) structure effectively prevents dust, dirt and fine particles from entering the bearing interior, reduces lubricant loss, and ensures smooth and stable rotation with low friction and low noise.With standard precision and compact size, they are pre-lubricated and maintenance-free for daily use. These miniature bearings are widely used in 3D printers, micro motors, electronic toys, precision instruments, hobby models, office equipment and other small precision mechanical devices that require reliable miniature rotational support.