I want to create a cap that screws into the main body with a short throw screw action (a couple turns), so I tried creating male and female threads.
In the attached image and drawing, I created the wider blue Cylinder and the thinner green Cylinder concentrically before 3D Subtracting them (keeping the subtrahend), so I have a hollow, blue Cylinder and a solid green Cylinder.
I then created a Thread (Genuine option selected) with a 3mm pitch on the inner surface of the (now hollow) blue Cylinder and another Thread on the outer surface of the green Cylinder.
The resulting Threads have two different diameters, making them unusable in my application. I know that I could create the male thread and subtract it to create the female thread, but that would require very tight tolerances.
I can't find any formula for calculating the thread size from the diameter of the base cylinder, so I don't know if it's even possible to do what I'm trying.
The only thing that occurs to me is to create a male thread on one cylinder and subtract it from a wider cylinder, then scale it slightly in X & Y to create a gap to allow for manufacturing tolerances and to reduce friction, but that would change the angles of the threads.
So... any suggestions on how do to this properly?
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