Threaded Dust Filter

by Kezat, published

Threaded Dust Filter by Kezat Oct 12, 2014
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16472Views 7349Downloads Found in 3D Printer Accessories


Best of both worlds, no plastic tabs that become loose over time yet the convenience of inline attachment.
No extra hardware other then the sponge needed. Should work for 1.75 and 3mm filament.
Pinch filament between each half of a cut sponge and push all three in the small side and screw on the end cap.
Kitchen sponges seem to dry out, I have found that "Cellulose Facial Sponges" work well and are easy to find.

Uploaded a thicker walled center component.

Uploaded a version of outer portion that can thread on to the bottom filament guide of a Craftbot 3d printer.

Check out my other designs: http://www.thingiverse.com/Kezat/designs

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Works like a champ...if you 3D print...this filament filter is for you...mainly because it can be put on and taken off without having to remove the filament from the extruder!

Great design!

I've been using this filter for some time now and it's worked just great for me. I use cloth as a filter material. Kezat, I have an alternate use for this item :) If it's scaled up, it makes a nice toy for a large bird cage. You can check out my video on this item at https://youtu.be/QKZd0FsLRPU

Nice design, it is easy to print and fits on first try.

Printing this right now. Have printed a few dust filter designs and wish I had found this one first.

Thanks for the kind comment, I'm glad you like it.

A simple design but it works better than any that I have tried thus far. Sometimes simpler is better right?

Are you guys wetting the sponge with something?

I have made two of them and use foam with three drops of 3in1 small motor oil. I add oil every 10-12 prints. It works great and makes the bawden tube smooth and avoids snags, missed prints. Love them. Will make one for each color. Call me crazy!

Are you talking about using it to oil the hotend or to soften the sponge?
I use cellulose facial sponges from the beauty section, its cheap and will stay soft even if dry.

If your talking about oiling/seasoning the hot end then yes, i know of people who use it to to do so by adding a little oil to the sponge.

I once used 3in1 oil in a similar sponge filter and it crystallized upon reaching the hotend (by wetting the filament, obviously) which resulted in a big clog :(

I'd say you better try with sewing machine oil.

I once used 3in1 oil in a similar sponge filter and it crystallized upon reaching the hotend (by wetting the filament, obviously) which resulted in a big clog :(

I'd say you better try with sewing machine oil.

hey, this prints really well.
Can you tell/teach me how you modeled the thread? I'm using inventor with the thread modeler addon from coolorange but my threads don't come out as smooth as this one.
Which kind of thread did you choose?

I did not use a thread tool, this was a manual sketch followed by a coil cut.
Here is a sample inventor thread sample http://www.thingiverse.com/thing:970980
If you need more information let me know. Look for the "thread_sample.ipt" file.

Oddball file share.
by Kezat

Hey, thank you very much for the ipt. Finally my threads are printing well.
However, do you also have the other side of the thread or a measurement how much space you'll have to leave?
e.g. 5mm outer diameter of the inner part and 6mm inner diameter of the outer part before applying the spiral?

Thanks a lot!

I normally have around 0.5 difference from inner to outer diameter, then cut one spiral and extrude the other. Layer heights can effect the tolerance slightly.

Hey, Cool Item!! I was wondering if you have heard about running clear filament through a color sharpie (marker) that had the ends cut off and filament fed through. The end result was the item came out the colour of the magic marker. So, a drop of ink in your device might be same. Once I get some more filament I am planning to print this and try. Just thought you might want to know. Cool if many of your items, all different colours of sponges and as you say, quickly interchangeable. Many colours per print!!!

I'm not sure if it's suited for that but it would be an easy thing to try. If you do then any share photos:)
Something like this might work better, can still change the color really easy by swapping the markers.

Filament Colorizer - Marker Holder For 3mm filament
by cyclone

A nice Little tool. I Printed the thicker one. Works at once. Thanks. (Filament 1.75 mm)

Glad you like it. Thanks for the feedback.

Printed one up tonight. Fits perfect, no clean up or hassle getting the screw and nut to work. Thanks

Thanks for the reply! I got it to print correctly by reducing layer height to 0.1mm and now the threads sticks together alot better.

Can you upload one with the walls thicker? I'm not that good with modeling nor modifying the drawings.


what's your slice settings and layer height? cant seem to get the male side to print correctly, the threads always comes out too thin even if I print at 100%.

Thicker version uploaded, let me know if you still have issues.

I think this was 0.2mm layer height but you may want to reduce the extrusion width to solve your issue, in my experience around 0.35mm works best. I at times change it around from 0.30 to 0.40 depending on the detail i need. Or if you cant find that setting printing at 0.15 layer heights should automatically reduce the extrusion width. If your using the slic3r slicer see if checking "detect thin walls" helps.

With Slic3r slicer setting layer height to 0.2 and extrusion width to 0.4 will cause a spiral gap between the threads, I suspect that is your issue?

If you still have issues I can try uploading a version with a thicker wall.

LOL µRuler from EEVBlog :D

Nice i like this one!