Barrel Cooper's Puzzle Box

prusaprinters

<p>This puzzle box design is deceptively difficult. Locate the the solution plaque and restore it to the front of the barrel to display mastery over this fiendish challenge.</p><p>As with all box-style puzzles, this design has a hidden compartment, but finding that is only the start!</p><figure class="media"><oembed url="https://youtu.be/Cz7uQzU-ICY"></oembed></figure><p><a href="https://youtu.be/Cz7uQzU-ICY">https://youtu.be/Cz7uQzU-ICY</a></p><p><strong>NOTE: This design has been updated to use a 4mm diameter dowel pin. Do NOT use a 6mm dowel as stated in the video below.</strong></p><figure class="media"><oembed url="https://youtu.be/r9lFujHjRo8"></oembed></figure><p><a href="https://youtu.be/r9lFujHjRo8">https://youtu.be/r9lFujHjRo8</a></p><figure class="media"><oembed url="https://youtu.be/qwfj4RTal0U"></oembed></figure><p><a href="https://youtu.be/qwfj4RTal0U">https://youtu.be/qwfj4RTal0U</a></p><p>&nbsp;</p><h3>Hardware</h3><h4>Required</h4><ul><li>M3 x 70mm Bolt</li><li>M3 Washer</li><li>M3 Locknut</li><li>Spring (5mm diameter x 15mm length)</li></ul><h4>Recommended</h4><ul><li>M3 x 8mm Length Bolt (x3)<br>Attach lock ring without glue</li><li>O-ring 12mm Outer Diameter 8mm Inner Diameter (x4)<br>Gives lids a tighter fit</li></ul><h4>Optional</h4><p>Add magnetic latch to hold cork</p><ul><li>Steel Dowel Pin 4mm Diameter 14mm Length (Or cut down a bolt to size)</li><li>6mm x 3mm Cylinder Magnet</li></ul><h3>&nbsp;</h3><h3>Links</h3><p>Since finding the correct hardware can be tricky, I'm providing links to the exact items I've purchased for my own prints. I can't guarantee these will be in stock, but I do know they worked for me.</p><p><strong>O-Rings 12mm OD 8mm ID 2mm Width</strong><br><a href="https://www.amazon.com/gp/product/B07F329SW1">https://www.amazon.com/gp/product/B07F329SW1</a></p><p><strong>M3x70mm Hex Bolt Socket Head Cap</strong><br><a href="https://www.amazon.com/gp/product/B015A33SBE">https://www.amazon.com/gp/product/B015A33SBE</a></p><p><strong>M3 Pitch Black Nylock Nuts</strong><br><a href="https://www.amazon.com/gp/product/B07FRLRWD4">https://www.amazon.com/gp/product/B07FRLRWD4</a></p><p><strong>6×3mm Cylinder Magnets</strong><br>https://www.amazon.com/gp/product/B07873ZCY4</p><p><strong>5mm diameter x 15mm length Spring</strong><br><a href="https://www.amazon.com/Stainless-Compression-Springs-Silver-0-5x5x15mm/dp/B08952DV8C">https://www.amazon.com/Stainless-Compression-Springs-Silver-0-5x5x15mm/dp/B08952DV8C</a></p><p><strong>52100 Alloy Steel Dowel Pin, 4mm Diameter, 14mm Long</strong><br><a href="https://www.mcmaster.com/52100-alloy-steel-dowel-pins/material~52100-alloy-steel">https://www.mcmaster.com/52100-alloy-steel-dowel-pins/material~52100-alloy-steel</a></p><p><i>These are not affiliate links and I have no association with the sellers listed</i></p><p>&nbsp;</p><h3>Printing</h3><p>The following parts need to withstand some force, so it's recommended that you print them with more perimeters and/or a higher infill:</p><ul><li>Interlocking Pin Top</li><li>Interlocking Pin Bottom</li><li>Screw</li><li>Cork</li></ul><p>I've personally found 30% gyroid infill with 3 perimeters to work well, however your results may be different depending on layer adhesion, printing temperature, filament quality, etc. Printing the cork in PETG will also result in a much stronger print.</p><p>&nbsp;</p>