All dry grains can be ground with the KoMo Mio mill, including soft or hard wheat, oat groats (dehulled oats), rice, triticale, kamut, spelt, buckwheat, barley, rye, millet, teff, quinoa, amaranth, sorghum, soybeans and dent (field) corn. It will also grind lentils, dry beans (pinto, red, garbanzo/chickpeas, kidney & more), and dried, non-oily spices. It isn't suitable for herbs, oilseeds like flax or sesame, popcorn, or fibrous materials.

Dent (field) corn and soybeans can be ground to any texture from cracked to meal to very fine flour. For these very large-kerneled grains, grind first with the stones opened widely to produce cracked grain, then a second time if you want flour. If you want to grind oat groats open the stones about five clicks (or so) wider than you would for a hard grain like wheat, otherwise the soft oat flour will fill the stones' furrows and in-feeding will stop. Opening the stones further will give you a cereal grind for porridge, or coarser yet for cracked oats, similar to steel-cut.

Easy to live with: As with all KoMo grinders, cleanup of the Mio is minimal and easy, and full access to the milling stones takes just seconds, without tools. A sealed lid keeps everything clean between uses. Sound level is a big issue with many grinders; being among the world's quietest-running grain mills, KoMo's products are kind to your ears and your nerves.