CNC tool grinder overview: The Super Precision CNC246F is a fully automated 3-axis CNC tool grinder, complete with 2-axis loader for flute and O.D. relief grinding of cutting tools such as endmills, drills, routers and re......CNC tool grinder overview: The Super Precision CNC246F is a fully automated 3-axis CNC tool grinder, complete with 2-axis loader for flute and O.D. relief grinding of cutting tools such as endmills, drills, routers and reamers as well as special applications in carbide, HSS and similar materials.