6mm to 4mm PTFE fillament filter

Updated 11/03/2023 [dd/mm/yyyy]:

V1

Original version, has dimentions for 6mm and 4mm PTFE tubing, threads have an offset of .5mm for a well calibrated printer. However due to material shrinkage, and layer height selected this might not fit properly. Due to it being to tight of a fit. If the threads are fine, you might have to drill out the PTFE openings to size however going to far might result into a loose fit.

V2 (for most people)

Added 1mm larger holes and thread spacing for the PTFE tubing for a better chance of the tubing to fit due to shrinkage and the nature of 3d printing (you ussualy cant get a 100% accurate dimention unless the part can be exactly devided by the layer width and height.

V3 (thread spacing, no hole offsets)

Added a version with the thread spacing, but left the material for the PTFE tubes intact. This version is suitable to be drilled into to fit PTFE or pnumatic couplers if desired. Note that the vertical dept you can drill into is basically till you hit the screw section of the print.

If interest is there, i might make a version thats 6 to 6mm, 4 to 4mm, accepts pnumatic couplers etc. Let me know.

Self designed, coupler and filter in one.

Goes from 6mm to 4mm PTFE, with a void in between to insert a lubricated sponge or cotton filling. 

I personally use a sponge as its more “solid” moistened with a lubrecant. the sponge has been cut to fit the void, with a vertical slit so that when the filter is turnd loose half a turn, the filter can be removed without having to remove the fillament, so no need to cut/preheat/and pull the fillament trough your extruder loop.

The print is made for dialed in printers, due to the cooling requirements for the thread. if your printer isnt dialed in the thread will most likely fail to print due to the higher overhang. This is the first time i designed threads into a print. So i might give it a shot later, to reduce the thread angle to print without supports on any printer. I personally printed it out without supports.

Materials suggested:

Any non-flex fillament, if printing in an enclosure i reccomend ABS,PETG for more heat resistance.

Personally used settings to print:

Material - PETG

Layer height - 0.12mm

Infill - 100%

Support - none or, support overhead angle ~75 degrees to stop the threads from being supported

Print speed - 40mm/s, redid it at 70mm/s was fine too so could probably go faster.

Fan speed - 100% , initial fan speed 35%, regular fan speed at layer 4

Adhesion: brim

For best results, print lid seperate from base.