Removable Wall Mounted Spool Holder

Description

General Description:

This is an easy to remove wall spooler which I designed specifically for use with my H2D with TPU85A/90A. I’d been unable to get decent prints with these materials using the TPU inlet port at the back. Probably due to the distance from the filament spooler and the rolling resistance of the spindles I’d tried.

For the H2D, Bambu have their own printable design for a suitable spooler here:

https://makerworld.com/en/models/1421552-h2d-flexible-filament-top-feed-rack?from=search#profileId-1477010

But reports are variable on how well it performs and fits and, more importantly, for me it wouldn’t fit with my setup.

My design uses two 608ZZ bearings which allow the spindle to rotate very freely.

Obviously this spooler will work fine with normal filament!

Materials Needed:

The bearings I used are ceramic and available fairly cheaply here:

https://www.amazon.co.uk/dp/B08ZN94S5L?ref=ppx_yo2ov_dt_b_fed_asin_title

These bearings are VERY free running and actually might be a bit too free for some uses. Normal steel bearings will work fine and might actually be better overall.
EDIT!
NOTE- I have actually had to swap those bearings out for some standard ones. The wheel was so free spinning a jerk from the tool head would end up with a loop on the print bed.!

Plugs – if required – I used Fischer 4no. 6x30, 6mm drill bit

Screws – 4no. 4x35 – make sure the head will sit within the recess

Files:

FINAL MAIN FILE Wall Mounted Spool Holder SMALL Spindle Version - V3 Improved Wall Mount Design.3mf

This file contains everything you need to print the spool holder and mount BUT I have since updated the design with:

1. A better, single cover plate with Bambu logo – 
   “FINAL Cover Plate Alternate“

If you prefer this and use the 3MF file then remove the old cover plates (x2)

1. An easier to install wall mount which can also act as a template - 
   “Wall Mount with Template NEW (recommended)”
   If you prefer this to the original and use the 3MF file then remove the old wall mounts (x2)
2. A template to help mark up the holes for drilling – “New Template (Very optional if using the wall mount with template)
   If you use the new wall mount then it isn’t really worth printing this.
3. Two alternative spool files -
   “FINAL Wall Mounted Spindle LARGE Spindle ONLY (ALTERNATE))”
   “FINAL Wall Mounted Spindle LARGE Spindle ONLY (ALTERNATE-ELEPHANT COMPENSATION -0.1)”
   The small spindle which is included in the 3MF file is more likely to cause the filament roll to skip but it will accept slightly wider spools and accommodate smaller diameter spool bores. If you don’t want both spindle types then remove the smaller one from the 3MF.

NOTE – Due to the weight of the larger spindle and how it is printed (on its end with supports) you may find that the bottom bearing insert widens slightly when printing. You can either sand this down to fit or try the compensation file.

NOTE 2 – The spindle ends at least need strengthening as mentioned below or use 85% sparse infill for the whole spindle. This is to make sure the ends don’t break off when seating or unseating the spindle in the bearings and the holder.

1. The Spool holder as an STL file -
   “Spool Holder - Split to Objects and Orient Parts For Printing”
   As the file name suggests, split the assembly into objects and re-orient for printing. Supports are needed for the left and right spindle holders, they should print fine laid flat on either side.
2. The tube holder parts as an STL file -
   “Tube Holder Parts”
   Split to objects. Use supports.
   
    

Print setup:

The 3MF files are setup as follows:

Material used – Bambu PLA - Sparkle

Generally 

Sparse infill – 40%, Cubic

Support – Tree Auto, style Tree Hybrid

Both spindles have modifiers to strengthen the cylinder the bearings mounts onto so that it doesn’t just break when  you need to pull the spindle out to change the filament. Both ends need strengthening of course, I used 85% sparse infill and approx. 30mm at each end.

Assembly:

Spindle:

All parts for assembly are designed to push fit together fairly tightly without glue.

Push fit the bearings onto the spindle. If you printed the large spindle without compensation you might need to use a vice to push the bearing on to the bottom end.

The spindle with bearings on should smoothly push into the frame and sit there reasonably firmly. It may be worth you just printing one side of the frame to check the fit isn’t too tight. If it is overly tight it may be necessary to file some material away with a craft knife or sandpaper.

If you need a larger socket – leave a comment and I’ll try to do an update.

Middle Frame To outer Frames

The middle frame should push very tightly into the left and right frame pieces.

PTFE Guide And Brackets:

The brackets should fit tightly in the frame and the guide should, with some effort, fit very tightly in the brackets. Once in, it should rotate with a little effort by design.

Push a single piece of PTFE tube all the way through the guide – it should, again, go through smoothly and not too tightly.

Assembled Frame To Wall Mounts

Once assembled the left and right frames should smoothly slide onto the wall mounts. It should be reasonably easy to remove the frame once installed with a small amount of force. If it feels like too much force is required there may be filament left over from the supports and failing that some sanding/trimming may be needed.

The frame cover pieces have a greater tolerance and should drop into the slots once the spool frame has been removed to cover up the screw holes.

Installation:

I would recommend printing and using the template.

The template has a small tolerance of +0.2mm to allow for the fact that the middle frame probably will not fit perfectly flush to the outer frames.

CHECK the template against the assembled frame to make sure the holes line up!

Make sure the template is perfectly level, mark the holes, find suitable plugs, (where needed) and screws and fix the two wall mount pieces to the wall. It is important to get this done accurately so that the assembled spool frame will slide straight onto the wall mounts.

Checks:

Once installed check that the spindle spins very easily within the frame. Install a spool with filament and check that the outer parts of the spool don’t touch the frame when rotating.

Final Notes:

When testing Bambu TPU90A I used a small section of PTFE push into the tool head (this is not what Bambu suggest!) and guided the filament through the printed PTFE guide and then through that with not problems at all – see video.

I didn’t test TPU85 at all. I believe this doesn’t slide well with PTFE tube so you may need to avoid using the guide and insert the filament directly into the tool head.

As mentioned – if you are struggling to make things fit please leave a comment and I’ll try to provide some alternate files.

Bambu TPU printing recommendations:

https://wiki.bambulab.com/en/h2/h2d-tpu-printing-guide

EDIT:

Changed the main file to include improved wall mount and cover plates.

EDIT2 13-7-25 20:00 :

IMPORTANT!

Error with the wall template - it was 5mm too wide. Corrected now, apologies to anyone who may have printed it already!

Added an alternate cover plate which joins the two wall mount bars together with a Bambu Logo on the front.

EDIT3 17-7-25:

Modified the Wall Mounts to ease the insertion the the Spool and the Cover Plate(s)

EDIT4 16-8-25:

I have reworked the template! Again, apologies to anyone who had problems. The last one was just slightly out.

1. Added a new fully corrected template which works with the original models.
2. Added “Wall Mount with Template NEW.stl”. This can be used as a template in itself (a little more awkward for marking than the dedicated one) and incorporates the wall mounts themselves.
3. Added the spool holder parts as an STL. 
4. Reworded the instructions and description because it had become a mess!
   
    

Videos: