The 693-ZZ is a Premium Ultra-Miniature Deep Groove Ball Bearing engineered for compact, high-precision applications. Featuring double metal shields (ZZ) on both sides, this metric bearing provides effective dual-side protection against dust and light contaminants, ensuring smooth operation in sensitive mechanisms. With an ultra-small 3mm bore, it is an essential component for micro-motors, precision instrumentation, small electronic devices, and any application where extreme miniaturization and reliable rotation are required.