WINSINN GT2 Timing Belt Pulley 20 Teeth, 8mm Bore, for 6mm Width Belt - Ideal for 3D Printers, CNC Machines, Robotics (5-Pack)

I probably didnt need to replace the old ones on my neptune 4 pro, but I wanted the shiny! They have worked well and havent had any issues after fifteen to twenty prints now.

Working great just like I need them too. Easy to install for my project. The set screws hold their position well and not have any give to them even after raising them to just about the maximum height you can and tightening them. Will update later if something fails.

As described

The media could not be loaded. I have been using for a while and they are really good

The aluminum was not suitable for my project application.

Good quality machining, fits exactly what I needed to complete a project.

Winsinn makes great fans, and now, they make great pulleys.I have put over 100 hours of printing on these pulleys without so much as skipping a beat. They're well made products and screw great onto any D shaft stepper motor.Fit and finish on these is nice- if a little shiny. Given how durable they are, I might just have to prematurely replace them and buy the black color.Finally- I would highly recommend a couple of drops of loctite blue (non permanent) on the grub screw threads before you set these onto your stepper motor for a guaranteed secure fit.

The price was low enough for me to experiment and they worked great.