The MR52-ZZ is a Premium Ultra-Miniature Deep Groove Ball Bearing engineered for high-precision and reliable performance in the most compact applications. Featuring double metal shields (ZZ) on both sides, this metric bearing provides effective protection against dust and particulate matter in confined spaces. With an ultra-small 2mm bore, it is an ideal, space-saving choice for micro motors, precision medical devices, tiny instrumentation, and miniature mechanisms where every cubic millimeter counts.