Keyhole Hanger Negative Volume

Create an embedded keyhole hanger in your existing object by simply add a negative volume in you slicer.  Keyhole pocket is 6mm deep (but can work in objects less than 6mm, if desired).

With your target object loaded in your slicer, add a negative volume, choose load and which size keyhole opening you want.  You can only see the negative volume's location in 3D Editor View (Ctrl-5). Position keyhole negative volume where you want it, slice, and print!

Use the Center-of-gravity capabilities in PrusaSlicer to find the perfect center location to place the keyhole hanger, even in complex parts.  (Ctrl+6 to enter Preview Mode, then click the black and white quartered circle (BMW logo?) icon at the bottom of the Legend.)

You can also use these .STLs to do a boolean difference/subtract in your favorite CAD software, if you prefer.

Print instructions

Download negative volume STLs.  Insert desired .STL as a Negative Volume into your existing object in PrusaSlicer.  Slice the resulting object.  Print.

Summary

A negative volume shape to product keyhole hanger opening within your existing object to allow it to be mounted on the wall with a screw.

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