Full Ceramic Si3N4 624 Ball Bearings 4x13x5 Miniature Precision Bearing, 20 Pack, Silicon Nitride Ceramic Bearings For High Speed, Low Friction, Corrosion Resistant, Ideal For Industrial, Medical, Robotics, Hobby Applications
✔️ 4x13x5mm full ceramic bearings, 20 pcs, Si3N4 balls & races
These miniature 624 full ceramic bearings use silicon nitride (Si3N4) balls and races with a PTFE cage, delivering low friction, high hardness, and corrosion resistance for precision robotics, small motors, hobby builds, and compact machinery.
✅ Inner bore: 4 mm
✅ Outer diameter: 13 mm
✅ Width: 5 mm
✅ Material: Si3N4 ceramic balls and races; PTFE cage
✅ Pack size: 20 bearings
✅ Low friction, high hardness, corrosion-resistant
✅ Suitable for high-speed, precise applications
💡 What is a full ceramic ball bearing used for in precision machinery? They’re handy for equipment where low friction, high speed, and resistance to corrosion matter. - Low friction from silicon nitride surfaces - Excellent corrosion resistance in moisture or chemicals - Lightweight design helps high-speed precision work - Long service life with minimal maintenance