eSUN Reusable refill spool

This is a reusable spool designed to fit eSUN 1 kg refill filament

Its designed to be:

• Reliable and safe; wont unscrew itself by accident

• Easy to print

• Use less material than the original version made by eSUN

• No need for additional nuts and screws. Everything is 3D printed

• Holes to secure the filament tip that holds it securely while not bending the filament too much and that does not interfere with stacking spools 

Dimensions:

• Inner hole diameter: 55 mm

• Spool core support: 81 mm

• Outer rim: 200 mm

• Rim wall thickness: 3 mm

• Spool outer width: 65.2 mm

• Spool inner width: 59.2 mm

Printing:

• Screws are designed to be printed flat and the threads are designed with sufficient tolerance

• The rest can be printed with normal settings. If you would like the spool to be stiffer, you can increase the top, bottom and wall counts

Assembly:

• Place the refill filament on the lower part and line the cutout in the carboard core with the notch. 

• Place top spool part and insert the screws. Tighten lightly with a flat head screwdriver

• Remove bands that secure the filament and secure the filament tip in the included holes or with your favorite filament clip

Update 15.02.26:

• Fixed some holes that were off center for some reason.

• Shortend the screw. It was uneccesery long.

• Adjusted the threads to be less prone to failure while printing.

• Added STEP files.