4mm Bore Bearing - 19.5mm steel Pulley U-Groove Track Roller 4x19.5x6.7mm

4mm Bore Chrome Steel U-Groove Pulley
✔️ Shielded Track Roller Bearing 4x19.5x6.7mm

This U-groove pulley bearing is designed for small track systems where smooth guidance and dust resistance are key. With a 4mm bore and durable chrome steel body, it's built to roll steady in tight spaces. Dual metal shields help keep grime out and performance in.

✅ Bore: 4mm
✅ Outer diameter: 19.5mm
✅ Width (tire): 6.7mm
✅ Material: Chrome steel
✅ Shields: Double metal (ZZ)
✅ U-Groove for track or cable systems
✅ Pack size: 1 bearing
✅ Tolerance: ±0.5mm

💡 Why are U-groove pulley bearings commonly used in sliding or guiding setups?
They guide cables, belts, or rails with precision and minimal wear:

• The groove keeps motion aligned on track

• Metal shields block dust and extend life

• Great for 3D printers, robotics, and DIY rigs

• Chrome steel construction handles load and speed

Tiny but mighty, this U-groove bearing is ready to roll wherever you need compact, precise guidance. Go ahead, add it to your setup and make things smoother.