This is a wonderful burr grinder

My case wasn't good enough for my application, unfortunately, I've returned this grinder and bought a $200 burr grinder which worked very well for my espresso machine with a non-pressurized portafilter.

This grinder has conical steel burrs, and they work as well as the ceramic disc burrs in my small machine

Great burr grinder that produces grounds from super fine to coarse.

I disassembled the burr and put it back and everything worked fine again