GT2 Belt Idler Pulley, 20 Teeth, 4mm Bore, 6mm Wide, Aluminum With Bearing, 2mm Pitch, Flanged Smooth Idler For 3D Printers, Ideal For Delta Printers Like Kossel Delta And Other Models, Reliable Tensioning And Quiet Operation

This compact aluminum GT2 belt idler pulley guides the timing belt on 3D printers, keeping tension and alignment for smooth motion. It’s a common add-on on DIY machines like Kossel Delta, RepRap, and other hobby printers to improve belt routing and print consistency.

✅ 20 teeth GT2 pitch 2mm for standard timing belts
✅ 4mm bore fits 4mm shafts on common stepper assemblies
✅ 6mm width supports 6mm wide GT2 belts for solid grip
✅ Aluminum body with integrated bearing for smooth rotation
✅ Flanged design minimizes belt wander and improves guidance

💡 What is a GT2 belt idler pulley used for in 3D printers? The simple answer: it guides the belt and keeps tension for accurate motion. - It guides the belt around wheels for smooth travel - It helps maintain consistent belt tension to reduce backlash - It works with 2mm GT2 timing belts on hobby printers - It supports stable belt alignment for reproducible prints