I killed one coffee grinder using it to grind rice into flour. Today I bought a small Hamilton Beach coffee and spice grinder at KMart that seems to handle small jobs nicely. It is tedious to use to create large amounts of flour, and I have no idea how it will old up to long term use. I have a couple old-fashioned meat grinders, but they are definitely NOT efficient for grinding grains. They will give you lots of exercise, though. I have a couple spare Carborundum grinding stones on hand and I'm trying to think of a way to use those. As usual, however, my imagination outstrips my practical knowledge and ability!