Four Millimeter Linear Bearing With Double Sealed LM4UU For CNC Machines And 3D Printers Twelve Pack Nickel Plated Precision Bearings Deliver Smooth Low Friction Motion And High Accuracy For Repetitive Positioning In Automated Equipment

4mm LM4UU Double-Sealed Bearings for CNC Printers, 12-Pack
✔️ Bore 4mm, OD 8mm, L 12mm; double sealed, nickel-plated, 12 pcs

LM4UU 4mm linear bearings are compact, double-sealed bushings designed for smooth, precise motion in CNC machines, 3D printers, and other automated equipment. They pair with 4mm shafts and deliver reliable performance in tight spaces, with corrosion-resistant nickel plating.

✅ Model: LM4UU, Bore 4mm, OD 8mm, L 12mm
✅ Double rubber seals protect against dust and moisture
✅ Nickel-plated carbon steel body for corrosion resistance
✅ Recirculating ball design for smooth, low-friction motion
✅ Pack: 12 bearings per order
✅ Operating temp up to 80°C

💡 What is a sealed linear bearing used for in small machinery?

- Handy for compact CNC axes and 3D printer beds in tight spaces - Provides smooth, low-friction motion on 4mm shafts - Sealed design keeps dust out and lubrication in, boosting life - Easy upgrade with standard LM4UU sized bearings