Lot de 20 roulements miniatures entièrement en céramique 684-2RS, roulements à billes Sealed , 4x9x4mm, cage en PTFE, haute précision, faible frottement, pour les loisirs, la robotique, CNC et les machines de précision. Idéal pour les micro-guides linéaires, les drones, RC et 3D .

These sealed full ceramic bearings are lightweight, ultra-precise parts designed for hobby, robotics, and small machinery. They handle high speeds and harsh environments where corrosion resistance matters.

✅ Bearing type: full ceramic 684-2RS sealed
✅ Ball material: Si3N4 ceramic
✅ Cage material: PTFE
✅ Inner/outer races: Si3N4 ceramic
✅ Dimensions: 4x9x4 mm (ID 4 mm, OD 9 mm, width 4 mm)
✅ Pack size: 20 bearings per pack

💡 What is a ceramic ball bearing used for? Ceramic bearings are handy in tough environments. They provide fast, smooth motion with reduced heat and corrosion risk. - Ideal for high-speed spindles and precision gear work - Great for non-magnetic, clean-room setups - Helpful in wet or acidic conditions