Full Ceramic Bearing With ZrO2 And Si3N4, PTFE Based Grease, One Quarter Inch Bore, Five Eighths Inch Outer Diameter, 0.196 Inch Width, R4-2RS Shielded Ceramic Bearing For Industrial Machinery And Precision Equipment

Ceramic R4-2RS Bearing with ZrO2/Si3n4, PTFE Grease
✔️ Size 1/4 x 5/8 x 0.196 in; pack 1, ceramic, PTFE grease

This all ceramic bearing uses zirconia oxide races and silicon nitride balls, sealed with PTFE based grease for smooth operation, long life, and broad temperature tolerance. It’s commonly found in precision machinery, robotics, medical devices, and other demanding equipment.

✅ Size and fit: bore 1/4 in (6.35 mm), OD 5/8 in (15.88 mm), width 0.196 in (4.98 mm)
✅ Ceramic construction: inner/outer races ZrO2, balls Si3n4
✅ Sealed 2RS: shields protect from dust and contamination
✅ Lubrication: PTFE based grease for low noise and long life

💡 What is a ceramic bearing used for in precision machinery?

Ceramic bearings are handy in precision setups due to low friction, high stiffness, and temperature tolerance.

• Low friction for smoother, quieter operation
• Excellent high-temperature resistance and corrosion protection
• Lightweight construction helps with fast, compact assemblies
• PTFE lubrication supports longevity in harsh environments