As Awerby mentioned, melt out is not a very great idea for casting. It can work for some basic geometries but can be rather limited for anything that prevents gravity from evacuating the wax.


We produce a machinable wax filament that is specifically engineered for investment casting. If you are used to printing with typical plastics, it can be tricky to learn, but the advantage comes from the very easy post-processing and extremely low ash content.

I have actually done a cast personally a few months ago with an impeller similar to the one you linked. This was only my second time doing this, so it is admittedly not a very good cast, but still a proof of concept for that type of print geometry. Far from a polish here, just some passes with a Dremel and sandstones.


Someone with more experience casting did this model for us that we printed at 50 micron, then polished with mineral spirits.