4mm Bore Bearing - 13mm Shielded Pulley U-Groove Track Roller 4x13x7mm

4mm Bore U-Groove Pulley Bearing
✔️ 4mm x 13mm x 7mm - Shielded Track Roller Style

This U-groove track roller bearing is designed with double metal shields to block out dust and debris while rolling smoothly along round or V-shaped tracks. With a 4mm bore and compact size, it’s a solid choice for guides, sliders, or DIY pulley setups.

✅ Dimensions: 4mm ID x 13mm OD x 7mm width
✅ U-groove shape for track-guided motion
✅ Shielded on both sides with metal covers (ZZ)
✅ Metric standard construction
✅ Steel body for long-lasting wear
✅ Quantity: 1 bearing

💡 What’s the benefit of using U-groove bearings in motion systems?
U-groove bearings help maintain alignment and control:

• Track smoothly along rails, edges, or tubing

• Metal shields keep out dust for longer bearing life

• Compact and easy to install in tight spaces

• Perfect for sliding doors, pulleys, 3D printers, and guides

If you're working on a rail-based motion system or pulley design, this U-groove bearing is a simple way to roll with control. Try one and keep your setup running on track.