K40 Laser Air Assist

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Out of the box, the K40 laser works very well with 1/8″ acrylic.  Wood, however, has been a bit of a challenge.  Its not that the K40 lacks power, its that the wood has a tendency to flame up and burn.  There are many options for a K40 laser air assist upgrade, but I was impatient and wanted something today.  I’m sure there are plenty of 3D printed K40 laser air assist mods out there.  Well, here is another.

k40 laser air assist

You can download the OpenSCAD source files or rendered STL file either here, or on Thingiverse.  The tube is repurposed from this dental floss roll I bought on Amazon


Assembly is simple, slide the stiff ‘dental floss’ tube into the angled hole, then slide the entire assembly onto the lasers lens mount assembly.  Everything is press fit, and no extra hardware is necessary.  Once installed, you simple slide your 1/4″ tubing into the stiff ‘dental floss’ tube and you are ready to go.

For my setup, air is provided by a small and silent operating airbrush compressor.  This is the one I’m using.