Professional-grade 684-2Z deep groove ball bearing featuring double metal shields for high-speed dust protection. Engineered with 4mm bore, 9mm OD, and 4mm width for reliable industrial performance. Delivers exceptional dynamic load capacity of 0.814kN and static load capacity of 0.28kN with smooth operation up to 45000 RPM. Ideal for motors, machinery, automation equipment, and transmission systems. Available for retail purchase, wholesale orders, and OEM customization. Fast delivery, competitive pricing, and quality guaranteed.