I wanted a way to include a 'lock' combination on a preform (PET) tube. Your geocache can have a puzzle, with the combination to open the tube, is the solution to a puzzle, or nearby gadget cache.

I would love to see pictures of your prints, and hear how you will use it as a geocache if you have specific plans!

1/12/21 - added inner shaft and lid for 5 digit version

See original design for assembly instructions. You can make it with 3 rings or 5 rings.

[https://www.printables.com/model/190850-combination-safe-00-cryptex](https://www.printables.com/model/190850-combination-safe-00-cryptex)

Print Settings

Printer Brand:

Prusa

Printer: 

I3 MK3S

Rafts:

No

Supports: 

No

Resolution:

0.2

Infill: 

20%

Filament: Paramount PLA / PETG Camo

Notes:

1. Mixing material brands can cause issues. I printed all in petg, but used a different filament brand for the number rings, and they didn't fit the same. YMMV.

Category: Hobby