Reinforced Post Command Strip Hanger

While working on another project, I needed a strong tool hanger that wouldn't break when I accidentally hit it with a tool. The hanger has to be a straight post, about an inch long, and it must be printed vertically.

The orientation is the problem. A small post printed vertically will easily snap at a layer. And turning that project on its side was out of the question.

This project started as a proof of concept -- use a small nail to reinforce a post. The box of nails I have are labeld Wire Nails 1" x 17.

It took a few iterations, but I finally found the right diameters for the "tube" that would print with a 0.4 mm nozzle, have four concentric circles (two inner perimeters, two outer perimeters), and have a snug fit for the nail.

Even though this was a test project, I decided to make it practical by making the base fit a Command Strip. I made the base just thick enough that I could countersink the head of the nail, and just like that -- a steel reinforced post hanger was born.

There is a sacrificial layer at 1.4 mm (the top of the countersink hole) to support the bottom of the tube. Just push the nail right through it.

For reference, here are some of the key dimensions for this project.

• nail length: 25.4 mm
• tube length: 26.4 mm
• nail dia: 1.5 mm
• tube inner dia: 1.9 mm
• tube outer dia: 5.5 mm
• nail head: 3.1 mm dia x 0.8 mm thick
• countersink: 3.5 mm dia x 1.2 mm deep

Final Thoughts

I had one layer between the nail head and the tube. When I bent the peg far enough, it separated from the peg at that layer. The whole nail, tube and sacrificial layer came off the base. If you wanted to improve the strength, then put more layers between the nail head and the tube. Of course that will make it harder to insert the nail.

Print Settings

Printer Brand: Prusa

Printer: i3 MK4

Rafts: No

Supports: No

Resolution: 0.2 mm

Infill: 15%

Filament: amazon basics PETG Black