30 Pack Of 6904 Full Ceramic ZrO2 Ball Bearings, 20mm Inner Diameter, 37mm Outer Diameter, 9mm Width, High Precision Ceramic Bearings For Industrial Machinery, Low Friction And Corrosion Resistant

These 6904 full ceramic ball bearings use zirconia ceramic balls and PTFE cages to deliver low friction, chemical resistance, and non-magnetic performance. They’re commonly used in CNC, robotics, medical equipment, and precision instruments where metal bearings are undesirable.

✅ ID 20 mm (0.79 in), OD 37 mm (1.46 in), width 9 mm (0.35 in)
✅ Material: Zirconia (ZrO2) ceramic; Ball: ZrO2; Cage: PTFE
✅ Pack size: 30 bearings per order

💡 What is a full ceramic bearing used for in precision equipment?

These handy bearings are built for environments where metal bearings risk contamination or corrosion.

- High hardness and wear resistance for long service life

- Non-magnetic and corrosion-resistant for clean rooms and medical gear

- Low friction with zirconia balls and PTFE cage