"To date@ grinding@ according to the German DIN Standard 8580@ is ""machining with geometrically undefined cutting edges"" while other machining processes such as turning and milling are classified as processes with ""geometrically defined cutting edges"". New abrasive grains@ called PSG and developed by 3M@ stand this definition on its head. For the first time@ grinding wheels made with PSG@ called CubitronTM II@ can claim to be made up of ""geometrically defined cutting edges"" as each and every grain is exactly the same engineered shape. Hence@ it might be more appropriate to talk about ""micro-milling"" rather than grinding. This is borne out by looking at the resulting ""flowing"" chips which are akin to chips seen in milling operations@ just finer. These free-flowing chips no longer clog up the grinding wheel and@ therefore@ the grinding wheel remains free-cutting and dressing becomes only necessary due to loss of from rather than loss of cutting ability. In repeated tests@ this has shown to drastically reduce the risk of burning and to give consistent and predictable results. Furthermore@ tests and subsequent long term trials under production conditions have shown that grinding time can be cut in most cases by at least 50% in comparison to grinding wheels made of standard ceramic abrasives. Based on more than 100 carefully monitored and documented gear grinding trials@ this paper will demonstrate how CubitronTM II grinding wheels work both in continuous generating grinding of car and truck gears@ and in form grinding of large diameter gears for wind generators@ for example. Furthermore@ the paper will discuss chip formation@ filmed with high resolution slow motion; and the benefits of the freeflowing chips in terms of resulting consistent surface finish@ superior form holding and extended dressing cycles."