Full Ceramic Bearing With ZrO2 And Si3N4 Construction And PTFE Based Grease, 12x21x5 Mm, 12 mm Inner Diameter, 21 mm Outer Diameter, 5 mm Width, High Precision Low Friction Bearing For Industrial Use

Full Ceramic Bearing 12x21x5 mm with PTFE Grease Pack 1
✔️ 12x21x5 mm bore, 21 mm OD, 5 mm width; ceramic, sealed

This is a high grade full ceramic bearing with ZrO2 inner and outer races and Si3n4 ceramic balls, sealed on both sides and pre lubricated with PTFE based grease. It’s a sealed ball bearing built for precision equipment, automation systems, robotics, and CNC machinery where low friction, high rigidity, and long service life matter.

✅ Bore: 12 mm
✅ Outer diameter: 21 mm
✅ Width: 5 mm
✅ Material: ZrO2 ceramic races, Si3n4 balls
✅ Lubrication: PTFE based grease
✅ Temperature range: -50 to 150 C
✅ Seal: 2RS sealed

💡 What is a sealed ceramic bearing used for in precision equipment? This handy design helps ensure long life and smooth motion in challenging environments.

- Low friction operation in high speed machinery - High temperature tolerance for harsh settings - Contaminant resistance due to sealed construction - Lightweight yet stiff for accurate positioning