Heavy Duty Pulley Wheel Set 4Pcs 0840UU 8x40x20.7mm U Groove Ball Bearing Roller For Doors, Sliding Tracks, Closets, And Mechanical Control Gear Smooth Glide, Durable Metal And Plastic Build

Heavy Duty U-Groove Pulley Set, 4x 8x40x20.7mm for doors
✔️ 4-piece U-groove pulley set, 8mm bore, 40mm OD, 20.7mm thick

These pulleys blend metal and plastic for a durable build that handles doors, sliding tracks, and closet systems. The grease-lubed bearings promote quiet, smooth movement.

✅ Inner diameter 8 mm / 0.3 in; outer diameter 40 mm / 1.6 in; thickness 20.7 mm / 0.8 in
✅ Model 0840UU; Type: U-shape; material: metal and plastic
✅ Pack size: 4 pieces per set; weight approx 109 g total
✅ Applications: doors, sliding tracks, closets, and mechanical control gear

💡 What is a heavy-duty U-groove pulley wheel set used for in doors and sliding tracks?

This handy guide explains typical uses and why this 4-piece 0840UU set fits the bill.

- In doors, closet systems, and sliding track mechanisms - Supports smooth glide with greased bearings and U-shape wheel - Compatible with 8 mm bore shafts and 40 mm wheels - Great for replacements or multi-point drive in small machines ✝️