18.5 By 26 By 4 mm Ceramic Ball Bearing With Stainless Steel Shields Si3N4 Ceramic Balls Radial Deep Groove Double Shield On Both Sides For Precision Machinery

Single 18.5x26x4 mm ceramic ball bearing with shields
✔️ 1 pc, Si3N4 ceramic balls, double shields, sealed

This sealed bearing features a stainless steel shell with ceramic balls (Si3N4) for low friction and long life. It’s a common choice in hobby gear, especially Align RC helicopter engines, where dust protection and reliable rotation matter.

✅ Dimensions: 18.5 x 26 x 4 mm
✅ Material: Stainless steel housing with ceramic Si3N4 balls
✅ Closures: Double metal shields on both sides for dust protection
✅ Type: Deep groove radial ball bearing, sealed and pre-lubricated

💡 What is a sealed ball bearing with ceramic balls used for in hobby gear?

- Handy for low-friction, high-speed rotation in RC models - Shields prevent dust intrusion and extend bearing life - Ceramic balls offer wear resistance and cooler operation - Fits compact shafts in engines and linear slide units