Infinity Filament Clip (Bambu Lab Reusable Spool)

The Infinity Filament Clip will stay on your Bambu Lab Reuseable Spool forever and can stay in the AMS without any issues on both sides :)

Why another Filament clip?  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 Filament 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 profile on the inside
• Can stay on permanently (but removes easily if needed)
• Fully compatible with AMS, AMS 2 Pro, AMS HT and AMS Lite

Printing

• Included profile 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.

Changelog

2025-12-15 v7:

• Compatiblity with AMS 2 Pro (thx to @cdeerinck for the help with prototyping)