Spring Loaded CNC Pen Holder

About: Hey! I'm Henri and I love making things. I'm currently studying to become an architect

Hello! This instructables will show how to make an inexpensive yet very effective pen holder which will help maintain even pressure across the printing/machining surface of a CNC machine. I was inspired by this instructable by ähöüokul :


However, I couldn't find the required bits at the time. And so, instead, I searched for an alternative. What I have come up with is an unintentionally steampunk looking, pen holder made from widely available plumbing supplies.

Step 1: Tools & Materials

You'll require only a few fairly basic tools:

  • Pipe cutter link or you could use a hacksaw
  • Glue gun

And the materials:

  • 15mm Ø copper pipe
  • 1/2" Brass hex nipple link x 4
  • 1/2" Flanged brass end cap link x 1
  • 1/2" Brass socket link x 4
  • Duct tape
  • Two part epoxy
  • Fine liner pen of your choosing
  • Spring from a disposable biro

These bits should cost you around £10 and are available from most hardware stores.

Step 2: Assemble

I have made a short video going through the steps I took to build this holder. If you have any questions please leave me a comment and I'll do my best to answer them.

Happy making!



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