by RichRap, published

MasterSpool by RichRap Jan 25, 2018
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MasterSpool by RichRap is licensed under the Creative Commons - Attribution license.

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This is a 'MasterSpool' For 3D Printing filament -

Blog post about MasterSpool over here -

MasterSpool Version 4 upgrades / changes and improvements

  • 14th Feb 2018 @RichRap3D

Improvements from user feedback.
Now three positions for 1.75mm and a really nice 2.85mm end slot that's easy to load and has just enough friction to hold the end well.
Really easy to use tie-wrap system – for 2.4mm to 6mm+ tie wraps – zip-ties, reusable tie-wraps and 'velcro' straps.

The model files are designed for both small & bigger nozzles. Ideal for chunky layers (0.25 or 0.3mm layers)

It is a quicker print time for both sides A and B

Edges are now 5.6mm wide and are also flat/smooth (not rounded) they roll really well on bearing type filament spool mounts.

Lighter, stronger locking of both sides together – you may need to give then a really good first twist to align up the holes – after that it should always be a nice tight fit.

I have also added a PDF document of the key dimensions of the spool and also the refill coils – this was the most asked question from people who had not yet downloaded the model file.

Hopefully V4 is the 'final' version – you can always make any desired changes for your own requirements yourself. FreeCad files of the spools are also included in the download files.

Older information below - Ignore unless you are interested -

Update Feb 6th 2018 -

Version 3 is now uploaded - do let me know if you have any problems or have feedback about the design - Version 2.1 has been tested with a coil of filament from Das Filament - it printed this Version 3 for further testing and quality of life improvements.

V3 has a slightly smaller diameter - 198mm so it can be printed on many more 3D printers

Used less material to print

Has integrated zip-tie / tie-wrap grooves all around the spool - you need to slightly twist the parts to align up the zip-tie sections - that's intentional to allow easy unload and some resistance on the coil when in use.

End of filament management - on the side for 1.75mm and a loop for both 1.75 and 2.85mm

See new Video about the V3 and first test of a real filament coil here - https://www.youtube.com/watch?v=AqnFiI3thjQ&feature=youtu.be

Older updates below - (use V3 above ideally).
Updated Jan 28th 2018 - The Original STL files for MasterSpool had a few problems for some people - the final export was a little messed up, sorry about that.

V2R1 is also uploaded - that just adds slots for three Tie-Wraps around the main PART A cylinder - Ref : @FishyFilaments

I have now simplified the design and added the new V2 files up on YouMagine and Thingiverse

Quite a few people asked about the critical dimensions for MasterSpool (750g version) - so here they are -

Outer spool diameter is 202mm

The inner ring diameter for the filament coil is 102mm

The mounting hole size is 52.5mm

For the 750g Spool the width of the filament coil is 46.7mm

For a 1Kg or 500g filament coil the width (46.7mm) is the dimension you would change to make a different, but compatible MasterSpool for other weights (that will not stay true for very heavy filaments like copper, bronze etc.)

This is a proposed idea for filament manufacturers to supply just filament on simple coils - held with paper/card and zip-ties - then users load onto the 'MasterSpool' for use in 3D printers.

Lower shipping costs, less packaging.
No plastic spools to recycle (they are usually ~300g)
More details and an overview Video on my Blog post here -

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Не подходит для GREG. Внутренний диаметр катушки слишком велик.
Not compatible with greg's filament. Inside diametr the Spool very big for it.

I think the majority of 3d print enthusiasts would not have a print volume to be able to print this.

Comments deleted.

The FreeCAD files are just mesh files. Are you able to provide solid files so we can customize this to work on our machines?

i came across something very similar on Amazon.

https://www.amazon.com/dp/B075K4X7RV/ <--- the refills.
https://www.amazon.com/dp/B075JBYS3S/ <---- the refillable spool

Ive been buying it for a while now, its pretty decent stuff.

Not sure if ther refills would fit the printed spool though.

Your links dont pull up anything.

hi there i love your project really i do but we all got old spools and thats a waste printing your spool is more than a day printing aint it an idea to cut an ecxisting spool in half put some screw in it and 2 rings for taiwraps and begin fila and end fila glue it in en go.. Less printing less waste and if you got a multy material like me not a week of printing lets try to reuse the original spools with some adjustments. its an idea thats all and less waste mayby more easy to store as the more we print more colours we store

That drop-shape is getting really close to that tie-wrap slot.

What settings are the parts are supposed to be printed with? Infill?

With 3 Shells, 10% Infill and 0,2mm Layer Height I get a printing time of 20 hours for both parts and 233 gramms of filament.
That is a strict no-go on my side.

I really do like the idea and I know it is working because my company is using two-part spools and re-fills for wires since at least 2005..

But I totally fail to see how 3D-printed spools are a good thing for the enviroment.

I printed both parts in about 13 hours (sliced with Simplify3D - the algorithms are really great for prints that big).
3 shells
12% Infill

I used exactly 229 grams of filament - so ist cost me about 5 to 6 Euros.

Why this is a good thing for the environment? Because the spools are meant to be printed in PLA, that is at least a bit better than other materials normally used for spools. But they are also meant to last forever, most people are throwing spools away because there's no use for it after you ran out of filament. There's also a "budget-version" of the MasterSpool from "Das Filament" - http://www.thingiverse.com/thing:2791930 . This uses much less material (still I don't think it is THAT great, but it should be working fine as well).

Little MasterSpool

Great idea and design. Unfortunately I have a printer with a bed too small to print this. Could I make a suggestion? How about a variant that is just the central core and uses the flanges of an existing spool? I could take an old spool, saw it in half and fit each side into a central core that is essentially the same as your existing central core.

There are two possible ways to do this, not sure which is best. Either cut the existing spool in half halfway along the central cylinder, or cut it in half and remove the central cylinder entirely and just use the flanges.

I appreciate the size of the central cylinder is not standardised, so there would probably have to be variants in different sizes. And attaching the flanges might prove difficult - but either friction fit or friction fit and glue might work fine.

Hi, thanks.
This is a great design. Can you please share step files to make is easier to modify?

Just download the freecad file, and export the step. Freecad is FOSS

V3 Part A STL has some defects according to meshmixer. This prevented me from remixing it. I would appreciate if you could look into it.

Hi, thanks for this great design ! I print a lot with 2.2Kg spools and I'm able to print a Master Spool max 400x400mm. Will you publish a version for 2.2/2.3Kg filament ?

Besides Das Filament, are any other vendors doing this yet?

There's a Chinese manufacturer, DBA TitanAddit on Amazon ( http://a.co/5mx6DZH ) selling filament on a refillable spool along with spool-less refills for a dollar less than the spooled filament. I don't know if the 1kg refills will fit the standard 750g MasterSpool or even if the refill will fit the MasterSpool hub. I don't see them selling empty spools, and their spool doesn't have slots for re-wrapping unused filament, but the refills are something to consider. Amazon reviews, as usual, are mixed on the quality of the TitanAddit filament.

On the picture, we can see Colorfabb.

they didn't start yet. they are doing some testing

Thank you so much for doing this. What a great idea!

upcycle Masterspool dasFilament
by techam

That filament catch on V3 is a great idea. I would add one on the opposite side too, though, so you have a catch at each half turn.

I also like the idea of the filament catch.
Is it possible to point one or both ends of the filament catch to the inside of the spool? I store my coils in plastic bags and I guess when the filament points to the outside of the spool, the filament would eventually poke through the plastic bag.

Good point. On second thought it seems that the filament catch made increased the thickness of the spool's edge over 4mm which prevents me to use my current clips as a fallback. I may end in modifying the design to keep the thickness below 4mm.

But how? Your filament is 1.75mm, so let's say you need a 2mm hole, then with 1mm walls, that's 4mm

4mm is fine indeed. I already designed a filament catch which works with a 4mm spool edge and also is located inside the spool so that the end does not poke into plastic bags which the spools may be stored in.

Hey there, this is an amazing Idea and gets lots of Support!!! DasFilament in Germany will sell Coil Filaments soon! Check out there Website with Pictures of your Spool and their Filaments they will sell...

Any idea how to print this on a 150x150mm print bed?

Please add some holes where you can put the end of the filament that it won´t tangle up - would be great!

Almost every coil has such holes.

It would be great if you could add indicators for remaining length or weight for typical materials (PLA/ABS/PETG). Only very few manufacturers do that :( If you're using Octoprint there are solutions but not everyone is doing that.

Files Are updated - fixing slicing problems - Sorry about that (28th Jan 2018) -

Something went wrong in the final STL export stage for the V1 files, and a few errors were also in the model - I have remade the files, simplified the model a little and uploaded new versions (V2) - if you check right now the new STL files are ready to use - (Also a STEP file is uploaded if anyone would like to use that) - I checked them in Cura, Slic3r and Simplify 3D - let me know if you have any other problems with slicing them - thanks. Rich.

The concept is wonderful, I like the idea to get the vendors into the boat to reduce the amount of wasted plastic a lot.
But I am facing major issues with your provided stl files (here as well as the ones on Youmagine): Neither Slic3r nor Simplify3d are able to slice them well. No hole in the center for both, and the thread is not showing up on slic3r. Slic3r is complaining for 5.8k shell errors. Slic3r 1.38.7-prusa3d with mk3 profile.

Sorry about that. Something went wrong in the final STL export stage, and a few errors were also in the model - I have remade the files, simplified the model a little and uploaded very versions (V2) - if you check right now the new STL files are ready to use - (Also a STEP file is uploaded if anyone would like to use that) - I checked them in Cura, Slic3r and Simplify 3D - let me know if you have any other problems with slicing them - thanks. Rich.

Best work Rich, confirm it is slicing without any issue - thanks for the quick reply and fix.

I tried running it through https://service.netfabb.com/service.php and it helped some, but the larger side still has no center hole. Definitely needs to be fixed up.

Sorry about that. Something went wrong in the final STL export stage, and a few errors were also in the model - I have remade the files, simplified the model a little and uploaded very versions (V2) - if you check right now the new STL files are ready to use - (Also a STEP file is uploaded if anyone would like to use that) - I checked them in Cura, Slic3r and Simplify 3D - let me know if you have any other problems with slicing them - thanks. Rich.

Thanks, Rich. :)

Could you simplify this by moving the threads to the inside of the outer cylinder of Part A, and eliminate its inner cylinder. Then put the threads on the outside of the cylinder of Part B ? Reduce the diameter of both cylinder's to keep the 55mm inner diameter, but a smaller outer diameter. This would allow more filament (maybe even up to 1Kg). It would save on weight and filament to print it.
Most spools also have small holes in the rim to let you lock the filament tip into so it doesn't flail around on the spool and tangle up. Maybe add some around one side.
Just some ideas.

The internal diameter is 102mm - and it really does not want to be any lower - ideally it should be much bigger, but we manage to get away with most 3D printing materials using this diameter. If you wind too tightly the filament will just break on use or be damaged etc.