“This is a quite robust 3d-printable machine vise. It’s 100% 3d-printed - no screw or other piece of hardware is needed to hold the individual pieces together. Pieces clip and snap together. It’s a demonstration that it is very important to consider forces and material properties already when designing a mechanical object. Hints about proper design are presented in my video: https://youtu.be/mziT7KV-fRI . The video also includes explanations how to assemble this vise. For 3d-printing it’s recommended to print 3 shell layers. 35% infill is sufficient. All the forces for clamping a workpiece are only active at the outer surface - more infill doesn’t make the vise more robust. Layer height is 0.15 mm (maybe screws are better printed with 0.1mm layers). No support material needed. Printed with 0.4 mm nozzle.”