.....fun? There may be a use for that down the road. I'm playing with how i can use it, I have a idea. No current need, just an Olde Dog learning new tricks....
Actually, I don't think the top one is, but the bottom one looks close. I can't open your files. May be a version issue or if you're using a student version. I can open it if you save it ass a STEP file.
The copper one is an epicycloid.
Can you open the STEP file I attached for the first one? That should tell you.