This is a small 3D-printed egg pinhole tool designed to safely hold a standard #11 X-Acto knife blade so only the very tip is exposed.

The blade is set so approximately 1 mm protrudes from the base, allowing you to pierce a tiny pinhole in the bottom of an egg before boiling. The goal is to help release trapped air inside the shell.

Features

• Precise blade exposure – only the tip sticks out for controlled piercing

• Threaded adjustment base – bottom section tightens to push and lock the blade into position

• Protective threaded cap – knurled-style edges for easy grip, fully covers the blade when not in use

• Safer handling – keeps fingers away from the sharp edge during storage and use

• Simple, compact design – easy to print and assemble

Insert an X-Acto blade, adjust the bottom to set the blade depth, and use the top cap to safely store the tool when finished.

Model & File Notes

• The model file contains all parts combined in a single file.

• In OrcaSlicer, you will need to separate the parts first, then you can orient and slice each part individually.

Print Settings Used

• Printer: Flashforge Adventurer 5M

• Nozzle: 0.6 mm

• Material: PLA

• Layer height: 0.18 mm

These settings produced clean threads and good fit between parts.

Supports & Thread Notes

• Threads:

  • Designed in Fusion 360

  • Internal threads offset by 0.1 mm for smoother fit and easier assembly

    • Edit these threads based on your printer

  • No supports required for threads

• Supports needed:

  • Required only for the 90° internal overhangs

  • Not needed elsewhere