Thread Trouble

[Compwiz1]

I am having the hardest time getting these threads to work. I have a two part model that I want to be flush with one another when the pieces are screwed together. I have threads on both parts but the treads just don't seem to match up. Any idea why this might be happening and what I can do to fix it?

Threadshole thread configuration

[jhackney1972]

Please attach your model so the forum users can assist you using your exact model.

[wmhazzard]

If you model the two components together and then add the threads, they should line up. If not attach an f3d file of your model. 

[jhackney1972]

I just noticed this is your first post.  If you do not know how to attach you model do this.  Open your model in Fusion 360, select the File menu, then Export and save the model to your hard drive.  Then use the Attachment section of a forum post to attach the file.

[Compwiz1]

Thanks. I attached my model. There are several sections to this that are supposed to screw together. I'm pretty new to modeling in Fusion360 so the model may not be the cleanest, any help would be great!

[wmhazzard · Accepted solution]

For your model, leaving the sleeve solid and doing a combine cut with the switch will align the two threads but you have to manually offset the female threads to allow for clearance. I used 0.1 mm in the attached file and you may need more if you are 3d printing this. 

[Compwiz1]

That's awesome, thanks! Just curious, why did you give so much clearance at the bottom base?

[wmhazzard]

It is standard practice to leave clearance at the bottom to allow for imperfect threads. If it was machined you would have at least two or three revolutions of imperfect threads even with a bottoming tap so you would have even more clearance than the 1 mm that I left. 

[Compwiz1]

Ah ok, makes sense, thanks. My background is in 3D modeling for gaming/animation so I'm not used to thinking of things from a real world manufacturing perspective.