Open 684 Ball Bearing 4x9x4 Mm Miniature Deep Groove Chrome Steel 52100 Precision Bearing Designed For Micro Mechanisms Small Servo Drives Drones RC Models Mechanical Assemblies And Hobby Projects

684 Open Ball Bearing 4x9x4mm in chrome steel
✔️ Open deep-groove 4 mm bore, 9 mm OD, 4 mm wide and 52100 steel

This compact 684 open ball bearing is a precise, small component often used in hobby electronics, model making, RC cars, drones, and compact automation projects. Its open design allows easy lubrication and quick inspection, while the deep groove geometry minimizes friction for smooth operation.

✅ bore: 4 mm (ID)
✅ outer diameter: 9 mm (OD)
✅ width: 4 mm
✅ material: 52100 chrome steel
✅ type: open, deep groove ball bearing
✅ dynamic load rating Cr: 640 N
✅ static load rating Cor: 230 N
✅ max speed (grease): 59,000 RPM
✅ max speed (oil): 70,000 RPM
✅ quantity: 1 bearing

💡 What is a 4x9x4 mm open ball bearing used for in small hobby projects? This handy part supports tiny shafts in compact assemblies.

- lubrication-friendly design for easy maintenance - fits micro motors, gearboxes, drones, and RC toys - offers reliable performance in tight spaces - compatible with chrome steel open bearings

684 Cuscinetto a sfera aperto 4mm x 9mm x 4mm