Full Ceramic Si3N4 Ball Bearing With PTFE Cage, 12x21x5mm, High Precision Ceramic Bearing For Industrial And Commercial Use, Featuring 14 Si3N4 Balls, Low Friction, High Wear And Corrosion Resistance, Long Service Life

Full ceramic bearing 61801 with Si3N4, 12x21x5 mm
✔️ Pack: 1, bore 12mm, OD 21mm, width 5mm; 14 Si3N4 balls

This full ceramic bearing uses silicon nitride balls and a PTFE cage. It’s a common choice in precision machinery, robotics, and medical equipment where low friction and corrosion resistance matter.

✅ Inner bore: 12 mm
✅ Outer diameter: 21 mm
✅ Width: 5 mm
✅ Balls: 14 Si3N4 ceramic balls
✅ Cage: PTFE
✅ Closures: Open
✅ Material: Full ceramic Si3N4
✅ Pack: 1 bearing

💡 What is a full ceramic bearing used for in precision machinery and high-temp environments? This handy answer breaks down the core benefits for quick scanning. - low friction at high speeds in precision equipment - corrosion resistance under harsh chemical and moisture exposure - long life with PTFE cage and Si3N4 balls - lightweight and stable performance in critical alignment setups