Tungsten carbide is the most used carbide for milling tools due to its high fracture toughness and flexural strength. However, conventional carbide tools are expensive to manufacture due to the lengthy grinding processes and long retooling times. Recently, additive printed tools have attracted a lot of attention. Microcracks, high residual stresses and brittle phases are still major obstacles. In this study, the FFF (Fused Filament Fabrication) process is developed to print crack-free and low-stress milling tools made of hard metal (Tungsten carbide). The production of highly filled filaments with 94 wt % tungsten carbide is described. The effects of the process parameters, debinding and sintering on the porosity at the surface of the cutting edges will be discussed. The microstructure of the sintered samples was examined by electron microscopy. The hardness and residual stresses will be illustrated.