Bambu Infinity Filament Clip for Reusable Spool

Filament clips are incredibly useful, but they often come with their own set of frustrations: they can be fiddly to attach, easily lost, or they sit on the rim of the spool and snap off when you store the spool on a shelf. In my search for a better clip, I tried various designs. One in particular by Kevbot, caught my attention - a clip that could be mounted directly onto the spool with screws. Although it was close to what I needed, it had a few drawbacks: it was too bulky, and sometimes aftermarket refills wouldn't fit comfortably on the spool (especially B grade mysterybox refills from Recycling Fabrik).

This gave me the idea to redesign it to be more low-profile, using button-head screws mounted from the outside. While working on this, I stumbled across another clever solution by the same designer - a clip that simply snapped into the spool holes without the need for screws.

And that’s when it hit me: screw the screws! I created the Infinity Clip, the LAST filament clip you'll ever need. For real this time … pinky promise ;)

Features

• Snaps into existing holes of your reusable spool

• No hardware needed

• Does not protrude outside the spool

• Prints without supports

• Ultra-low 2mm profile on the inside

• Can stay on permanently (but removes easily if needed)

Printing

• Included profiles for Bambu Lab printers

• Use any material you like, but if the spools will be used in an active filament dryer, choose a material with a suitable heat deflection temperature. PETG works well up to 70°C; for higher temperatures, consider ASA, ABS, or PA.

• Tight tolerances: For best results, print at a low layer height of 0.10 mm, flat on the build plate with pegs facing up.

• Integrated bridge compensation structure included for optimal print quality.

Assembly

• After printing, check for any small filament specks caught in the openings. Ensure that filament passes through freely by using a stiff piece of filament to clear the channel.

• Once clear, gently press the clips parallel into the holes. You may use pliers or press them firmly in place using the edge of a table.