Hi all,
which material would be most suitable to tap a M3 and M4 threading myself? Using threaded inserts sadly isn’t an option since it is a fairly thin design (3-4 mm) and I haven’t found such low-profile inserts.
I’d appreciate the insight of anyone who has experience with this!
Thanks!
Hi David,
Most of the plastics we offer are suitable for tapping a thread. For a small thread like M3 or M4 to function properly, however, we’d recommend using a tougher material, like ABS, or Gray Resin, since it has good material density.
You can also find some recommendations on adding a thread here: Adding Screw Threads to Your 3D Printed Model
Let us know whether this helps 
Ok, thank you for your reply Dimitriy!
What about the suitability of Polyamide (MJF)? It is the only material I have ordered from you before, so I am only familiar with that one, but I do like how it turned out overall. But I did not tap any threading on the previous piece so I don’t know about that aspect.
Hey David,
MJF Polyamide is a decent option, although it’s a powder-based material produced with 0.1 mm layer thickness, so I’m not sure how well a very thin/sharp thread would work. I think you’ll just have to test it.
Ok, thank you for your insight Dmitriy!
Hi, you can grind down a bushing to the thickens you need. Put a long screw in it as you grind, for a handle and turn it threw the bushing to clear flashing before removing the screw.
Hope this helps
Ford