4 Pack U Groove Pulley Wheel Kit 5x25.5x8.5mm Nylon Guide Bearing For Door Window Tracks U Type Wheel With 6mm Groove Shielded Dual Sided Chromium Steel Bearings Quiet Smooth Operation Blue

4-Pack U-Groove Pulley Kit: 5x25.5x8.5mm Nylon Bearings
✔️ 5x25.5x8.5mm U-type wheel, 6mm groove, shielded bearings

These U-Groove pulley bearings come in a 4-pack and are designed for door and window track systems, delivering smooth, quiet operation in track-driven hardware.

✅ I.D. 5mm, O.D. 25.5mm, thickness 8.5mm
✅ Groove width 6mm, groove depth 3mm
✅ Shielded on both sides; chromium steel bearings with ABEC 1 (P0)
✅ Blue color; 4-pack kit for multiple tracks

💡 What is a pillow block bearing used for?

Pillow block bearings support rotating shafts in fixed housings in machinery and track systems. - Provides shaft alignment in equipment - Used in door/window track assemblies and linear guides - Shielded designs help retain lubricant and reduce noise ✝️