4 Pcs U Groove Bearings 4x13x6mm Rail Ball Bearings Groove Guide Pulley Bearings Steel Replacement For Rail Track Linear Motion Systems In 3D Printing Projects ABEC1

4 Pcs U Groove Bearings 4x13x6mm for Rail Track Motion

These U groove rail bearings guide linear motion along rails and are ideal for 3D printers, sliding doors, and CNC setups.

✅ Size: 4x13x6 mm U Groove bearing
✅ Inner diameter: 4 mm; Wheel diameter: 13 mm; Groove width: 3.5 mm
✅ Material: bearing steel GCr15; Color: silver
✅ Bolt size: M4; Width: 6 mm
✅ Packing: 4 pcs U Groove Bearings, 4 pcs guide rail rollers, 4 pcs M4 bolts

💡 What is a rail U-groove bearing used for in linear motion systems? This handy piece helps guided motion along rails in a variety of setups.

- Guides moving parts with consistent alignment in linear paths. - Commonly used in 3D printers, sliding doors, and automation projects. - Made from GCr15 bearing steel for durability and rust resistance. - Always verify rail compatibility before mounting to avoid fit issues. ✝️