door handle (parameterized openscad model)

thingiverse

I created this door handle during my kids' relentless slamming of the kitchen door against the radiator a few times, forcing me to repair the original multiple times on an old door that will soon be replaced. WARNING: If you customize using OpenScad, you'll need to postprocess the STL file with Meshlab's "Filters -> Cleaning and Repairing -> Merge Close Vertices" option to successfully slice it with PrusaSlicer. Simply import the mesh, apply the filter, export the mesh as an STL file, and you're ready. To print this object, lay it down on the build plate. I don't use supports for the screw and nut holes; instead, drill a 5mm hole through them to clear any overhang malformations. Insert an M5 nut into the hole, then pull it into place by tightening the screw while guiding its front end with a small bar, like a second screwdriver. Be cautious not to overtighten, as this may cause the plastic to crack. I exercised extreme caution when choosing my infill settings for the part that mates with the door, using 4 perimeters and additional selective infill to prevent cracks from forming in this critical area.