2RS1 Cuscinetto2RS1 in ceramica Si3N4 Sealed ABEC-5 12x21x5mm

Hybrid ceramic sealed ball bearing 12mm x 21mm x 5mm ABEC-5
✔️ S61801-2RS premium Si3N4 ceramic ball bearing for smooth high-speed work

This single S61801-2RS hybrid ceramic bearing gives you stainless steel raceways paired with Si3N4 ceramic balls, a nylon cage, and double rubber seals for clean, low-friction rotation. Built to ABEC-5 precision with C3 clearance, it’s a handy choice for electric motors, 3D printers, performance equipment, and any setup that needs high speed with steady accuracy.

✅ Metric size: 12mm ID x 21mm OD x 5mm width
✅ Hybrid ceramic build with Si3N4 balls
✅ Stainless steel races with nylon cage
✅ Double rubber seals for contamination control
✅ Premium ABEC-5 quality with EMQ smoothness
✅ C3 radial clearance for high-speed running
✅ Grease-lubricated and ready to install
✅ Pack size: 1 bearing

Dimensions Table
ID: 12mm
OD: 21mm
Width: 5mm

💡 How does an ABEC-5 hybrid ceramic bearing improve high-speed performance?
The tighter tolerances and ceramic balls reduce friction while keeping rotation stable at elevated speeds.
- Cuts heat buildup in continuous-run motors
- Maintains smoother motion under light and medium loads
- Helps boost efficiency in precision equipment
- Offers longer service life compared to standard steel-ball bearings

A sharp upgrade when your project needs fast, clean, and accurate rotation with minimal drag.