4x7x2.5 Sealed Miniature Ball Bearing Double Rubber Sealed For Dust Protection Pre Lubricated Chrome Steel 52100 High Precision Fit For RC Models Drones Robotics And Small Machinery

Sealed 4x7x2.5mm Miniature Ball Bearing for Precision
✔️ Sealed 4x7x2.5mm miniature bearings, pre-lubricated, 2 seals, 10 pcs

These compact sealed ball bearings are designed for tiny motion projects where smooth rotation is critical, commonly used in hobby robotics, micro RC models, drones, and precision gadgets.

✅ Inner diameter: 4 mm
✅ Outer diameter: 7 mm
✅ Width: 2.5 mm
✅ Material: 52100 chrome steel
✅ Seals: double rubber seals on both sides
✅ Lubrication: pre-lubricated with grease
✅ Dynamic load rating Cr: 260 N
✅ Static load rating Cor: 110 N
✅ Max speed (grease): 64,000 RPM