6mm Bore Bearing With 21mm Round Nylon Pulley UGroove Track Roller Bearing 6 By 21 By 10mm Durable Lightweight Nylon Wheel For Linear Guides And Sliding Applications Quiet And Smooth Operation

Single 6mm bore bearing with 21mm nylon pulley pack 1
✔️ 6x21x10 mm round nylon pulley, U-groove, 1 pc

This compact unit combines a 6 mm bore with a 21 mm round nylon pulley in a U-groove track roller design, ideal for small linear motion systems such as hobby CNC machines and 3D printers.

✅ Bore: 6 mm; Outer dia: 21 mm; Width: 10 mm
✅ Nylon pulley, U-groove track roller design
✅ Sealed ball bearing for smooth rotation
✅ Pack size: 1 bearing

💡 What is a 6 mm bore bearing with nylon pulley used for in small motion systems? - Handy for compact printers and light automation - Reduces friction on linear guides and rails - Nylon pulley lowers noise and wear in U-groove tracks - Ideal for hobbyists building small CNC or 3D printer rigs