FLSUN cube x tower belt tensioner

thingiverse

This part can be installed in any printer that supports ABS filament extrusion. It replaces the tall M3 screw directly, which secures the tension of the X-axis belt, utilizing only the remaining OEM parts. A spare M3 nut is the only additional requirement. The design is sturdy enough to handle high-temperature printing and is significantly faster. I used 3mm walls to construct this part and implemented a triangle infill pattern. After using it for over two months at constant printing speeds without any issues, it has proven to be reliable.