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Goal:

I'm trying to model the threads of a polar springs 500ml bottle in Blender 2.8x so I can 3D print an adapter for it.

Thread Image

Issue:

I'm having issues converting what Blender 2.8x calls Screw and what the diagram calls Helix Angle and Travel Per Turn.

Screw Mod

Full diagram of threads I'm following

I've been able to find some good dimensions for the threads to start with. Link to full diagram below. https://www.bevtech.org/assets/Threadspecs/2072573_tmp.pdf

Tried:

I was thinking of using the profile of a 3 edge plane See image below

3 edge plane

And using the screw modifier to make each of the 3 threads (each of the 3 threads only go around 73-75% of the bottle head) see image below (I was doing it this way to have more control over each thread since 3D printing this may require fine tuning each thread)

3 turns

To test the treads I would just use a cap that comes with the 500ml Poland springs water bottle.

Ps: I was following parts of this tutorial https://youtu.be/kVNxfCtoG_A

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Such a nice diagram almost calls for the Simple Deform Modifier :)

  1. Model the thread as in the diagram
  2. Add a Simple Deform Modifier > Bend
  3. Choose an axis and set angle to 360°

enter image description here

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  • $\begingroup$ Wow! How / what technique did you use to model that? $\endgroup$ – Rick T Aug 6 at 11:53
  • $\begingroup$ It's just a subdivided plane with projected threads. I'll describe the process in detail if you ask it as a new question :). $\endgroup$ – Jachym Michal Aug 6 at 12:17
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    $\begingroup$ Thanks, I just made another question. blender.stackexchange.com/questions/190092/… $\endgroup$ – Rick T Aug 6 at 12:40
  • $\begingroup$ what technique did you use to extrude the threads? $\endgroup$ – Rick T Aug 8 at 11:03
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    $\begingroup$ Hello :). Blender has an Extrude Tool for this. First, I extruded all faces to give the plane thickness, then I extruded only the threads. $\endgroup$ – Jachym Michal Aug 8 at 11:15

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