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I am trying to create two objects that screw into each other, very much like nuts and bolts, for 3d printing purposes. I started with two very simple shapes:

enter image description here

I am applying screw to them separately with the same parameters:

turns=3, center=0,6,0, axis=1,0,0

However, at the end, my shapes don't fit into each other:

enter image description here

What am I doing wrong?

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Perhaps a more robust approach is to 'model the gap'.

i.e. keep the inside and outside profiles as one object, (possibly reserving an AltD instance of the combined profile for convenient editing, ) then assign the screw modifier, then separate the surfaces.

enter image description here

(Which you can do by CtrlL select linked, and P > separate selection ). You can flip the normals of the female component, and embed it wherever it is needed, later on.

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You need to position the offset right. Click the vertex that would be on the spinning axis, and snap the cursor to it. In object mode, make "Origin to Cursor". Now do it for both, that should fix it.

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  • $\begingroup$ Thanks. Which vertex would that be? The topmost vertex for both shapes? Also, how do I snap my cursor to a vertex? $\endgroup$ – sodiumnitrate May 18 '18 at 20:32
  • $\begingroup$ Just search for blender screw, there are plenty of explanatory videos. $\endgroup$ – ak97 May 20 '18 at 10:04

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