Tiêu đề Neptune 4 Spool Roller Mod có in vòng bi Tóm tắt Đây là s

The assembly is simple. Print the parts (1 off for each of the larger components and 2 off for the bearings) and assemble as in the photos.

If you want to use a steel bearing, you can replace the printed one with an unsealed 609-9-24-7 bearing. A sealed bearing might have too much friction.

Works well with reverse bowden setup. See link: