Cryptex 300 Combinations Free 3D print model

cgtrader

Somebody requested a Cryptex, so here's a simple one with just 300 combinations. I think the math checks out for a single ring. The secret to programming is the little key tabs that snap into one of three positions for each of the five circular spots on a ring and there are five rings with five choices each. The math looks good - it equals (5 factorial) divided by (5 minus 3 factorial), which is sixty, and multiplied by five, equaling three hundred. A lot of confusion has surrounded this calculation, so I'll take a closer look. Just realized that if you add more rings to this design, it's an easy modification, simply lengthen the device with more coding cylinders and you can encrypt words or phrases. Standard-sized paper would easily accommodate over a dozen letters in this oversized layout. If I had devoted more time to refining this concept, all the rings could be uniform in width, but this will suffice for illustrating the principle. It's not intended for anything harsh like acid, and it's best suited as a children's toy - ones that can understand the concept of keys being safe for kids who don't consume them. The compartment has dimensions of 50 by 100 millimeters. All these parts can be created with a MakerBot too.