Premium Miniature Deep Groove Ball Bearings – Precision Engineered for Diverse Applications
Ultra-compact design (681-689 series) ideal for space-constrained machinery, featuring corrosion-resistant high-carbon steel construction for extended durability. Choose from multiple sealing options (Z, ZZ, RS, 2RS) to match dust/water resistance needs – Z for basic shielding, 2RS for heavy-duty fluid protection. Precision-ground raceways and polished balls ensure ≤0.002mm runout tolerance, reducing vibration in high-speed applications like drone motors or dental tools. Factory-direct pricing (60% below retail) with bulk discounts available – stocked in 10,000+ unit quantities for industrial buyers. Common uses: RC models, conveyor systems, medical devices, optical equipment, and automotive components requiring <15mm bore sizes. All bearings undergo ISO-certified testing with grease lubrication pre-applied for plug-and-play installation.