The Fossil - a skeletal karambit knife

thingiverse

Designed this a while ago for use with a small desktop CNC and 3mm titanium for an actual knife project. It worked surprisingly well and produced an insanely light titanium knife, but I never uploaded the model here. I don't have any photos of the finished blade due to it being lost in a move. If I re-create it or manage to find the old one I will be sure to update the post. If you find the design neat and want to give making one a try, or if you need a sci-fi prop for a cosplay, here's your blade. == For 3d printing: == Print at 100% infill in your filament of choice, be wary of temperature control so you don't end up with warps. If you want a thicker blade, print one, use a mirror function in your print software and print again. Glue the halves together and it should end up around 7mm instead of the original ~3.5mm. == For CNC: == * Source your material - Take your pick of aluminum or carbon fiber for props, GR5 titanium (6-AL4V) or knife-grade steel for an actual blade and get some 1/8" (3mm) thickness plates. * Cut the model using a CNC, or print the pattern on paper, glue it to the steel and use the stock removal method of knife-making. * If using blade steel, heat-treat it according to the alloy's requirements. * If you want to use titanium, look into "carbidizing", otherwise edge retention will be terrible. Recommended handle material is 550 paracord with the core removed so it isn't quite as bulky, or your choice of handle scales adhered to the sides.