This is a print that fits over the original metal spool holder and locks in place to allow it to hold thicker spools. This fits the FLSUN Delta printers.

I had the opportunity to pick one of these printers up at a good price. I wanted to see what a delta was like, and I am impressed at how well it works. But, like most Chinese printers, it has some very odd design choices with it. One is the ridiculous spool holder. While it is strong, it is too short and some spools hang over the edge. So this was the first issue I needed to address.

The installation of this print does not require any disassembly or screws, nuts, or any fasteners. This simply slips over the metal spool holder and locks securely in place. And is very easy to remove if you need to use a spool that is unusually small.

You can print this in almost any filament since the strength will come from the old metal spool holder inside this one making this very strong. Well, I would not recommend using a flexible.

The first image is a render done in Cinema4D with the Arnold renderer.  The next three are photos of the actual print.

Print instructions

This is properly oriented for printing and is designed to not require any supports during printing. This can be printed in PLA, PETG, ABS, PC, etc. I would recommend at least two parameters and at least five top and bottom layers. Infill can be 15% to 20%. A harder material, such as PLA, is preferred to reduce friction as the spool rotates.

To install the spool holder, make sure the two hooks are on the bottom and then slide it on over the old metal spool holder. There is a notch cut out inside the print (you can see it in the cutaway on picture 6) that locks the spool holder on the small part of the original metal bracket that is bent up. The two hooks on the new spool holder will then side into the back.

There is a guide inside the new spool holder (which can be seen in the cutaway on the last picture) which is on the inside-bottom to help keep the spool holder properly oriented as you slide it in place.

As in most of my prints published here, I designed this for my own use but felt that others may find it useful. Please let me know if there is any thing I can do to improve this.

This printer is surprisingly good, but not as polished as my other printers. FLSUN made some poor design choices. For example, the hot end fan blows down on the print which may cause first layer issues with PETG and layer bonding issues with ABS. The part cooling ducts were not aimed correctly. And of course the spool holder was totally inadequate.

Finally I want to give a quick shoutout to the great people on the FLSUN QQ, QQ-S, and Q5 Facebook Group for testing this out on their printers. I really appreciate the assistance and kind comments!

Good luck!