4x12x4/5mm U-Groove Track Roller Bearing Extended inner ring width of 5mm

4x12x4/5mm U-Groove Track Roller Bearing
✔️ Extended Inner Ring Width - Smooth, Shielded Design

This U-groove track roller bearing is built for precise, low-friction movement along guide rails or tracks. Made to metric standards, it features an extended inner ring width of 5mm for easier mounting and alignment. Double metal shields (ZZ) help protect the bearing from dust and debris, keeping it running smoothly in sliding or rolling setups.

✅ Bore Size: 4mm
✅ Outer Diameter: 12mm
✅ Tire Width: 4mm
✅ Inner Ring Width: 5mm (extended)
✅ Groove Type: U-groove
✅ Shields: Double metal (ZZ)
✅ Standard: Metric
✅ Quantity: 1 Bearing

☑️ Equal to: Common U-groove track roller models with 4x12x4/5mm specs

💡 Why use a U-groove track roller bearing?

• Guides motion along rails with minimal friction

• Extended inner ring makes installation easier

• Shields help keep contaminants out for longer life

• Works well in sliding doors, conveyor systems, and 3D printers

A solid little bearing that keeps your track-running parts gliding like new.