Full Ceramic Si3N4 Ball Bearings 4x13x5 Miniature 2RS Shielded Pack Of 20 Durable Silicon Nitride Bearings For Precision Machinery And Industrial Use Low Friction High Durability Lightweight Design

Ceramic 624-2RS Bearings 4x13x5, 20-Pack, Si3N4
✔️ Sealed ceramic ball bearing 4x13x5mm, PTFE cage, 20 pcs

These full ceramic bearings use silicon nitride balls and races for lightweight, high-hardness performance in precision assemblies such as robotics, medical devices, and hobby machinery. They’re ideal where low friction, corrosion resistance, and high temperature stability matter.

✅ Inner diameter 4 mm, outer diameter 13 mm, width 5 mm
✅ Full ceramic Si3N4 balls and races for low wear and high rigidity
✅ PTFE cage provides smooth operation in dry or light-lubrication environments
✅ Pack of 20 bearings for batch installations

💡 What is a 4x13x5 ceramic bearing used for in precision miniature machinery? Ceramic bearings are handy for high-precision, low-friction rotation in tight spaces. - low friction and high stiffness for precise axes - corrosion resistance and long wear life in tough environments - lightweight design with PTFE cage for quiet operation