How To Model Threads For 3D Printing (fusion 360) 

In the thread feature menu notice that there is a field named "class". This is a standard for how tight the thread should be. A lower number means less tight, or technically less "precise". For resin prints all I need is to select class 1 and it will work without any other modification to the thread and it will also fit existing threads from screws, bolts etc you already have.

Very awesome that you mentioned the need to change the thread pitch, etc., to be smaller for the bolt than the hole. I've tried more than a few models that didnt take that into account and had to learn it myself as well.

I found this tutorial quite useful. I have been struggling with parts that fit too tight and this makes things very clear. Thank you. I also saw Baldur's comment below on selecting the class of thread. Cheers to you both.

This is so helpful. I've always wondered how to do threading for a print but this makes it so easy.

Thank you! This is a great video and produced the exact results i was looking for on my 3D prints. I never really tried printing 3D threads because they would never work, and I've always tapped or threaded the parts to get them to fit properly. Now I have a solution to actually print 3D threads that work! Much appreciated!!! ✅

1 - Such a cool concept 2 - Such a wonderful cause, making people's lives better. You ROCK!

Thank you! I have been trying to figure this out for a while now. I figured out how to make the Threads but was tremendously overthinking how to make them easier to use!!!

Thanks for sharing and great that you help disadvantaged people 👍🏻

I also find doubling the scale of the thread in the z axis makes it much easier to print.

Worked a charm thanks!

Very useful, thanks!

Awesome! Thank you!

The size of your print is measured from the centre of your nozzle. When working with a 0.4mm nozzle, making a 10mm rod, or a 10mm hole will result in a 10.2mm rod and a 9.8mm hole. This has nothing to do with how well calibrated your printer is, but with the physical aspects of the nozzle, thus the thickness of the extruded filament. Removing 0.1mm on all sides means removing 0.2mm of the thickness of the rod (or screw). Doing the same on the inside of the threaded hole, means you now have a 10mm screw and a 10mm threaded hole.

Just go download the model of the bolt you want to print from McMaster Carr. Subtract it from the thing you want to screw it into. Works with any CAD program.

Any suggestion/experience in terms of adjustments for mating a printed part to its metal counterpart (i.e., a printed bolt mated with a metal nut)? Or does the .1mm adjustment give you what you need for that combination?

Heya friend. Cool project, cool idea.

Is there a way to calculate the amount of shrinkage for PLA? That would probably make it a bit more efficient than just printing multiple rings relative to the actual measurement, right?

This is interesting. I use Blender, PrusaSlic3r, and Mk3S+. I'll might try to build a metric thread index.

I found this to "fix" my issue with too much tightness.. This method allowed me to print in 0.20 with a BambuLab in PLA. I had to modify both threads.. (the bolt and the nut) to make it fit.. It was not enough to simply modify the bolt threads...

this is how I do it, but if you do it differently, or in other software, I'd love to hear it!

I've made a couple of small plastic bottles but when it comes to the threads I get a looping effect on the bottom of the thread any Idea what I'm doing wrong

ty for thinking about the disabled community; though this idea does not directly apply to me, I appreciate you thinking about us :)

There is a big text of 'Make:' in the top left hand corner. Might be wise to remove for future videos

I go to McMaster and download something with the thread I want in it...

Me: Oh making 3d print threads is going to be hard. Video: Right click and select "Thread" Me: ... o.O

I can’t believe in 2022 Fusion still can not make NTP pipe threads for 3d printing. How lame is this software!

wow potato quality