Inline fidget engine keychain

If you want to sell this print, get commercial license via patreon https://www.patreon.com/c/Artemix796

Mini inline 4 cylinders engine, with Fully functional moving pistons, pistons moving up and down when you are rotating the gear. I made it without piston rods and crankshaft to avoid complications in assembling so its optimized for easy printing with no supports required. i am using camshaft instead. Easy to print, easy to assembly. Great for car fans. Material: PLA (Silver, Gunmetal, or Metallic colors look best).

Assembly notes:

Short video on instagram artemix2006 https://www.instagram.com/reel/DT8smMOjX5O/?igsh=MXkxaWVsNXp1MG1l
All printed parts fit tightly together after printing, ensuring a solid and stable construction.

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