The spool shaft on the Wombot Exilis is good but it doesn't lock into place and i needed it to be a little wider.
I've included the blender file & openscad for remixing
I used this excellent set of code for openscad to generate the thread: http://dkprojects.net/openscad-threads/
If you print this with the flange side down for both parts, it wont need support material.
| thread.scad | 13.0KB | |
| through_bolt-bolt.stl | 798.2KB | |
| through_bolt-nut.stl | 1.4MB | |
| through_bolt.blend | 2.2MB |
