Skateboard Bearings Double Metal Sealed Deep Groove Bearings 8x22x7mm Miniature Ball Bearings or 0.3150×0.8661×0.2756″ Features: Double Metal Shields (ZZ): Protects the bearing from dust and debris, while retaining lubrication for longer service life. High Speed Capability: Engineered for precision applications with high RPM performance. Durable Construction: Made from high-quality chrome steel for excellent wear resistance and load capacity. Low Friction: Designed for quiet and smooth operation, reducing energy consumption and vibration. Versatile Application: Suitable for axial and radial loads in a wide range of operating environments. Common Applications: Electric motors Skateboards and inline skates 3D printers and robotics Power tools Small household appliances Fans and blowers