GRINDING WHEEL and ABRASIVES BASICS
Dec 28, 2016· Grit size. Grit size typically runs from coarse (16 24 grit), medium (36 60 grit) and fine (80120 grit). Superfine grits run from 150 and higher. Grinding wheels usually will be between 24 and 100 grit. Honing stones and jointing stones and other polishing abrasives will be 150 grit and higher.