Ultra-Precision 687ZZ Miniature Ball Bearing
High-grade chrome steel construction ensures durability and smooth rotation under high-speed conditions. Thin-walled design (7x14x5mm) maximizes space efficiency without compromising load capacity. Precision-polished raceways and premium steel balls reduce friction, delivering whisper-quiet operation for sensitive applications. Ideal for micro-motors, drones, RC models, and optical instruments. Sealed for life with low-noise grease, requiring zero maintenance. Bulk pricing available—direct factory supply guarantees unbeatable cost for industrial buyers.