Uxcell 30Pcs 684ZZ Deep Groove Ball Bearings 4X9X4Mm Sealed, P0 (Abec 1)

Double-sided rubber sealed bearings provide excellent protection against dust, dirt, and moisture, ensuring smooth operation and extending its lifespan. They are commonly used in applications that are exposed to harsh environments such as outdoor equipment or machinery.Z2 Noise Level: The Z2 noise level enables it to provide a quieter operating environment and is especially suitable for occasions with higher noise requirements.Chrome steel material: Deep groove ball bearings are made of quality chrome steel with excellent strength, hardness, wear resistance and corrosion resistance. It can withstand significant radial and axial loads, providing reliable support in a variety of applications.Wide Application: Widely used in various high-speed motors, gearboxes, fans, mixers, juicers, treadmills, massagers, manipulators, RC cars, office equipment, machine tools, etc.Selecting Guide Open Type (No Designation Suffix) - Suitable for high-speed and even very high-speed operation. Shielded (Designation Suffix Z/ZZ) - High speed. Protect from dirt and debris. Sealed (Designation Suffix RS/2RS) - Made of sheet steel reinforced nitrile butadiene rubber (oil- and liquid-resistant). Lower limit speed than metal shield bearings.