Screw tap & drill grinder This machine can be used for screw tap and drill grinding, reduce the number machines, ease of use, economic and practical. This machine is a accurate portable grinding machine, the operation is simple, do not need to skills,it can grinding quickly,equip with diamond grinding wheel. Capacity Drill bit:3-13MM, Screw tap:3-16MM Power 220V/180W speed 4000RPM Standard wheel CBN or SDC Machine size 310*210*200MM G.W. 20KG