4 Pack U Groove Pulley Set With 8mm Inner Bore, 40mm Outer Diameter And 20mm Thick Wheel, Ideal For Doors, Windows, And Mechanical Equipment, Smooth Quiet Rolling Bearing Guide With 100kg Load Capacity, Durable Roller Wheel Kit

4 Pack U-Groove Pulley Set: 8mm Bore, 40mm OD
✔️ 4 pulleys, 8mm bore, 40mm OD, 20.7mm thick, 100 kg

These four U-groove pulleys are built for smooth, quiet operation in doors, windows, and lightweight machinery. Ideal for track systems and replacing worn wheels on sliders or dollies.

✅ Inner diameter: 8 mm (0.3 in)
✅ Outer diameter: 40 mm (1.6 in)
✅ Thickness: 20.7 mm (0.8 in)
✅ Max load: 100 kg (220 lbs)
✅ Pack size: 4 pulleys

💡 What is a U-groove pulley with 8mm bore used for in track systems and light machinery?

It guides motion, reduces friction, and keeps components aligned in sliding setups.

• Supports doors, windows, and light equipment tracks
• 8mm bore fits common shafts and mounting hardware
• U-groove keeps wheel aligned with the track
• Internal grease enables smooth, quiet operation

✝️