5mm Bore Bearing With 21mm Round Nylon Pulley U-Groove Track Roller Bearing 5x21x6mm White Nylon Pulley For Smooth Linear Motion In Sliding Guides And Conveyors Ideal For Linear Guides Printers And Lightweight Conveying Tasks

5mm Bore Nylon Pulley with 21mm U Groove Track
✔️ 5x21x6mm round nylon pulley, U-groove, white, 1 pc

This compact nylon pulley with a 5mm bore fits 5mm shafts and features a U-shaped groove to guide belts in tight spaces. Commonly used in 3D printers, hobby CNC setups, and small robotics, it pairs with small linear motion systems to reduce belt slip and noise while keeping components lightweight.

✅ 5mm bore for 5 mm shaft compatibility
✅ Outer diameter 21 mm; width 6 mm
✅ Material: white nylon pulley with U-groove belt track
✅ Bearing: steel ball bearing in hub
✅ Belt groove: U-groove for secure belt seating
✅ Pack size: piece

💡 What is a 5mm bore nylon pulley with a U groove used for in small belt drive systems?

This handy component keeps belts aligned and motion smooth in compact setups. - Ideal for 3D printers, small CNC rigs, and robotics - Fits 5 mm shafts with a steel ball bearing for durability - U-groove belt guide minimizes slip and tracking issues