Ceramic Ball Bearing 4x8x3mm Sealed Miniature With Ceramic Balls Dual Rubber Seals Pre Lubricated Grease Chrome Steel Races 52100 Alloy Steel For Dust Protection And Tight Tolerances Ideal For Precision Models And Micro Mechanisms Requiring Low Friction

This miniature sealed bearing uses ceramic balls for reduced weight and smoother motion, perfect for micro linear slide units, miniature gearboxes, and precision assemblies.

✅ Inner diameter 4.0 mm (0.157 in); Outer diameter 8.0 mm (0.315 in); Width 3.0 mm (0.118 in)
✅ Material: ceramic balls in chrome steel races; Seals: 2 rubber seals
✅ Lubrication: pre-lubricated with grease for immediate use
✅ Pack size: 1 bearing; sealed for dust protection

💡 What is a small sealed ceramic ball bearing used for in handy projects? These tiny parts are built for compact machinery, micro robotics, cameras, and other precision setups.

• Sealed design protects grease and wards off dust for longer life
• Ceramic balls reduce weight and friction, aiding smoother speeds
• Pre-lubricated with grease makes installation quick and consistent
• Ideal for micro robotics, precision gear drives, and model equipment