Square drill using a Reuleaux triangle rotor

thingiverse

A Reuleaux triangle toy can demonstrate the concept of creating an almost square hole by rotating a crank-connected shape. The provided design involves complex off-center rotation using an Oldham coupler. To assemble this toy, follow these steps: 1) Print all parts; 2) clean up printed bits and drill necessary holes; 3) insert nuts into designated spots; 4) attach the handle to the arm with a bolt; 5) connect the handle to the larger disc; 6) lubricate the discs and slots; 7) assemble the smaller and larger discs, ensuring smooth movement; 8) place the assembly in the plate/box part and secure everything with bolts. For optimal results, apply lock-tight on nuts and bolts after testing the movement. Consult provided images and videos for guidance during assembly.