Brass Bolt puzzle

thingiverse

Revamped STL files, exported at 1mm per unit scale, are now available for this 3D-printable or manually constructible puzzle. Requisite materials include M16 & M8 brass nuts and bolts, a 4mm x 2mm round neodium magnet, and a 10mm x 4mm steel rod (derived from a 4mm nail). Heartfelt thanks to Grabcad user Heatniks for supplying the original bolt and nut diagrams. The concept behind this puzzle is borrowed from "Homemade Puzzles," available at http://homepage.ntlworld.com/bruce.viney/Bolt%20Puzzles%20Secrets.pdf. For a detailed walkthrough on assembly and functioning, visit http://www.instructables.com/id/Brass-Bolt-Puzzle/ or follow the instructions below: To solve the puzzle, remove the washer by striking the base against a hard surface, which will dismantle the other parts of the assembly, granting access to the washer.