Archimedes screw

pinshape

Note that this is an import from: Thingiverse The import messed up the formatting Updates occur on Thingiverse Summary This exercise was part of my ongoing effort to climb the learning curve for CAD & 3D printing. The screw itself is pretty much sorted. Apparently, an eight-vane configuration is somewhat optimal. (Found a paper on this subject.) Note that the design in Onshape is parameterized and properly constrained. You might want to keep the size of the screw small by changing the "length" parameter when doing test prints to save print time. You could make a larger screw by changing both the "length" and "case" parameters, and the rest of the parts should adjust accordingly. The top end of the screw can be turned by hand with a crank. Alternatively, you could remove the crank and turn the screw with an 8mm Allen key - perhaps attached to an electric motor or drill. How I Designed This Designed in Onshape https://cad.onshape.com/document/