A simple business card embosser.
Fully 3D printable, no hardware required, simply print out all the parts and assemble them all together to start adding custom flair to your business cards.

The bottom gears snap into place and wont fall off [so make sure you put them on the right way with both the indents facing the same way], this means that once they are in place, as long as you put them on the right way round, there is no need to check alignment when swapping the embossing wheels.

The handle also slots into place in the gear and rotates to lock, this prevents it falling out. You can rotate it the other way to remove it.

Below is the onshape link for the design, I'm not quite skilled enough to make it fully parametric however if you know how to use cad you are able to generate your own designs. If enough people request, I can make a video on the process.
Onshape file