The Butterfly: lightweight and easy head mount for LM6UU crossbars (eg. Ultimaker)

thingiverse

This work-in-progress design enhances the hot end attachment on your 3D printer, offering a lightweight and minimalist dual-head mount. Made for Ultimaker printers, it's a quick two-part assembly that can be replaced in just one minute. It works well with most 12mm OD bushings/bearings, and features a specific E3D mount shown in the last picture. The instructions suggest printing with Nylon or ABS, depending on your head cooling system. As improvements are being made to various hot end mounts, this versatile design can accommodate different types of hot ends, including the push-fit connector for quick and easy testing.