This is a simple jig for sanding bevels on bottom or tops of bone dry greenware (ceramics). The gap in this design is to accommodate a handle or spout. See below for post-printing instructions.
I designed this for use on some of my 3D printed ceramics. To learn more about this project, and about my ceramic 3d printing projects, visit http://instagram.com/cera.tops
See this tool in action:
This should be easily printable on any machine. PLA or PETG is recommended rather than ABS to avoid warping/cracking.
After 3D printing the jig, 2D-print the "sandpaper cut template", tape it to a piece of sandpaper (your choice of grit - I used 150 here) and cut along the lines.
Fix the cut sandpaper to the print with a water-based contact cement (or your favorite adhesive.)
Holes are on three sides to accommodate 6-32 OR m3 screws as "handles", and I mounted this to a turntable for ease of use, though this could easily be hand-held as well.