Cryptex Flower Jar Piggy Bank

Why?

I created this model as a gift. The incentive was to create a more or less stylish piggy bank for saving up for vacation. I also wanted to make it hard to open the jar without the password, which I did not provide to the one I gave the jar to.

Design directives and Idea

1. Require no supports
2. The password needs to be changeable
3. Simple Assembly
4. There should be enough space to save up for a vacation
5. The spout should serve as a vase
6. Should not be too easy to open (I guess I failed at that one; They got it open without me telling them the password XD)

The cryptex is a layered version. To open it, it required three five-letter words. Due to the taper in the cryptex the pins clear the other rings. 

Printing Instructions

I printed everything out of PLA. That was fine for that use case. The parts named PinRing_1 - 5 need to be printed 3 times. All parts should have at least one flat side that should be placed on the print bed.

The floral design on the plug printed just fine without supports as bridges. But the middle part was kind of rough due to the large bridge. However, my printer was not that good with part cooling when I printed this. So modern printers might do better here. The opening for the money is covered by a sacrificial layer that needs to be removed after printing.

Additional Parts and Assembly

In addition, you require

• 4x 3x12mm hardened pins
• 4x 3x10mm hardened pins

(the "hardened" part is not actually required for the jug to work ;) )

Insert the four 12mm pins into the top 4 holes in the plug and one of the 10mm one into the last hole.

For the cryptex assembly, put the three PinRings in the corresponding Dial. Make sure to align the openings in the PinRings with the letter of the dial needs to be set to when the correct password is inserted. 

Stack each finished dial onto the MainBody. After all five dials are assembled and placed on the MainBody put the whole assembly onto the jar.

The remaining three 10mm pins are used to secure the cryptex assembly to the jar. Insert them from the inside without the plug being inserted.

Also see the .STEP file as reference.

The spout can simply be inserted afterwards. As the bottom part is simply cylindrical you can also design your own spout, as, granted, this one is not that elegant. Some other might better fit the style of the jug.

I coated the jug with an epoxy resin with a white pearl pigment. That gave the main body an almost pottered look. That is however not required for the correct functioning of the jar.

Disclaimer

This was a one of design. It worked out as I intended it to, but there are probably things that could be refined. Feel free to leave me some comments if you are having trouble assembling this thing.

Hope someone else gets some use out of this.