The **PuzzeLock Box** is more than just a container — it’s a fully 3D-printed puzzle hidden inside a working lock. At first glance, it looks like a simple latch-box, but beneath its 2 mm-thick false floor lies a **programmable lock system** built entirely from printed parts.  

To open it, you’ll need to solve a sequence of steps:  
1. **Set the secret number dial** (42 possible positions)  
2. **Spin the box** to release the centrifugal latch  
3. **Slide the hinge into position**  
4. **Release the main latch**  

Only when each step is done correctly will the lid unlock.  
It’s part puzzle, part lock — and all 3D-printed fun.  

**Key Features**  
- **100% printed** – no hardware, screws, or extra parts required  
- **Programmable lock system** with your own secret number  
- **Unique puzzle sequence** – every opening feels like a mini adventure  
- **Snap-together design** with print-in-place latch  
- **Compact but useful**: inside cavity fits cash, cards, small valuables, or even a phone  
- **Great gift or challenge** – part puzzle, part secure stash  

**How it Works**  
- The **Secret Dial** (42 numbers) acts as a combination lock  
- A **Centrifugal Latch** with gravity weights forces you to spin the box on a flat surface  
- The **Sliding Hinge Section** controls both the dial and the latch  
- The **Latch Bar** at the front is the final lock, only freed once all conditions are met  

This layered system prevents “safe-cracking” by touch and guarantees that only the correct sequence will unlock it.  

**Specifications**  
- **Usable inside cavity**: 6.25" × 2.75" × 1" (158 × 70 × 25 mm)  
- **Outer dimensions**: 6.6" × 3.5" × 1.1" (168 × 89 × 28 mm)  
- **Lock mechanism thickness**: 2 mm layer in the floor  

**Printing & Materials**  
- **Box & Gears**: PLA  
- **Spring parts & False Bottom**: PETG (recommended for flexibility & transparency)  
- **No supports required** – built-in where necessary  
- **Print settings**:  
  - Nozzle: 0.4 mm  
  - Layer Height: 0.2 mm  
  - Walls: 4 (1.6 mm)  
  - Top/Bottom: 5 (1.0 mm)  
  - Infill: 40% Cubic (Box & Gears), 100% (Springs/False Bottom)  
  - Orientation: as per STL/3MF  

**Included**  
- STL/3MF files  
- Full 10-page **Instruction Manual** with step-by-step printing, assembly, and usage guide  
- Clear diagrams and pro tips for smooth operation  

---
**Related Links**
[3-digit Logical CardLock Case - The Programmable Gift Card Case with a Twist](https://than.gs/m/1464652)
[4-digit Logical CardLock Case - The Programmable Cash Case with a Twist](https://than.gs/m/1467071)
[BinaryBin – 16-Digit Binary Coded Lockable Container](https://than.gs/m/1354661)
[Programmable Combination Lock Gift Box](https://than.gs/m/1204871)
[StashCan 2.1 - 3D Printed Secret Safe with Programmable Lock](https://than.gs/m/1060354)
[Sequential Discovery Puzzle Gift Box #1 (GBS1)](https://than.gs/m/1227965)
[Centrifugally Unlocked Lock Box (BXC1)](https://than.gs/m/1266146)
[Locking Heart - Spin To Open](https://than.gs/m/1266312)

---
Please [join the LogicalPlanet Discord community via my linktree](https://linktr.ee/logicalplanet) to discuss this and any other LogicalPlanet projects, upcoming projects, ideas and anything else related to LogicalPlanet.   

**[https://www.logicalplanet.com/](https://www.logicalplanet.com/)**
email me at [logicalplanet3d@gmail.com](mailto:logicalplanet3d@gmail.com) 

---
**Revisions and Updates**
I occasionally update and revise my designs. When I do, I’ll document the changes here. Check back periodically for the latest revision notes or if you’re experiencing any issues with a model.  
2025-10-10: I have uploaded a revised version of the Box [100] with improved geometry, which should allow it to release more easily.  The new design includes a new small piece of removable support, which is shown in the new PDF document attached.   I have also significantly expanded the assembly instructions with addtional diagrams.




PuzzleLock Box — Lock and Puzzle in a Box

PuzzeLock Box 1v00a02 100 Box.stl

_A cryptex is a portable, puzzle-like container, typically cylindrical, that stores a secret message or items behind a combination lock._


---
This cryptex looks like a Mark 2 hand grenade, with four numbered dials that make up the main shell of the grenade. Similar to [my other cryptex on MakerWorld](https://makerworld.com/en/models/1450159-number-cryptex-configurable-puzzle-container#profileId-1510514), it has ratcheting encoding rings that can be used to set any 4-digit passcode you want! And turning the dials is super satisfying thanks to the ratchet!

There are three different versions of the dials you can print:
- Plain — No numbers at all if you want to paint them yourself
- Inset numbers — The numbers are inset holes on the dial
- Embedded numbers — The numbers are embedded and can be painted in the slicer

If you add a small spring to the fuse, you can make the safety lever, "spoon", to pop off when the pin is pulled, just like in a real grenade!

&nbsp;

---
**Printing tips:**
The parts are already oriented optimally. _Inner cylinder_, _Fuse_ and _Safety lever_ need supports. Use tree supports for the _Safety lever_.

If you're using Orca Slicer or Bambu Studio, a handy project file is included that has my print settings and painted parts ready to go!

&nbsp;

---
**Assembly**
You'll need an optional spring, 0.5x5x25mm recommended, for the safety lever action. But the cryptex works just fine without it, it's just a little fun bonus! You can also use a keyring for the safety pin ring, or use a printable ring.

No other hardware required to assemble! If you have printed the *bolt tool* included with [my previous cryptex on MakerWorld](https://makerworld.com/en/models/1450159-number-cryptex-configurable-puzzle-container#profileId-1510514), it will also work for this installation! If not, the tool is included here as well! Or you can use a flat- or hex head screwdriver too.

See the included assembly guide video!

&nbsp;

---

_**If you enjoy my designs and want to sell prints of them, I have membership tiers with commercial license available! Also if you want to support me while getting access to all my premium designs, I have a cheap personal tier. [Please check out my membership plans!](https://than.gs/u/803093?plans=true&affiliateCode=Jaatinen3D) ❤**_

Hand Grenade Cryptex — Configurable 4-digit puzzle container

Grenade Cryptex - Bambu Project.3mf

The BinaryBin is a fully 3D-printable, snap-together locking container powered by a programmable 16-bit binary code. It’s part puzzle, part teaching tool, and 100% nerdy—in the best possible way.
**What Makes It Special:**

- Mechanical DIP-style binary switches (16 total) grouped into 4 nibbles for easy binary → hex conversion
- Orbital gear-driven lock system that only disengages when the correct code is entered
- Programmable mechanism lets you set your own combination
- Non-binary switch state lets you “erase” the visible code after unlocking
- Hexadecimal encoding legend built into the layout (great for teaching or learning)
- Concealed mechanical latches, controlled entirely by the geartrain
- Fully printable — no electronics, no glue, no screws

**Educational & Fun**
Learn (or teach) how binary and hexadecimal systems work—by actually using them. It’s a brainy hands-on demo disguised as a seriously cool lockbox.

**Ideal For:**

- Puzzle lovers & escape room designers
- STEM educators & students
- Nerdy gift-givers
- Makers and collectors of mechanical marvels

**Printing Tips:**
- No supports required – all necessary supports are built in
- Includes an optional tool for disassembly
- PLA recommended with standard 0.4mm nozzle
- Full print & slicer settings included in the images

**Code it. Turn it. Unlock it.** The BinaryBin isn’t just a container—it’s a hands-on lesson in binary logic, gears, and clever design. Post your prints, remix your codes, and share your builds!

Please see the linked video for assembly instructions.

---
**Related Links**
[3-digit Logical CardLock Case - The Programmable Gift Card Case with a Twist](https://than.gs/m/1464652)
[4-digit Logical CardLock Case - The Programmable Cash Case with a Twist](https://than.gs/m/1467071)
[PuzzleLock Box — Lock and Puzzle in a Box](https://than.gs/m/1439725)
[Programmable Combination Lock Gift Box](https://than.gs/m/1204871)
[StashCan 2.1 - 3D Printed Secret Safe with Programmable Lock](https://than.gs/m/1060354)
[Sequential Discovery Puzzle Gift Box #1 (GBS1)](https://than.gs/m/1227965)
[Centrifugally Unlocked Lock Box (BXC1)](https://than.gs/m/1266146)
[Locking Heart - Spin To Open](https://than.gs/m/1266312)

---
Please [join the LogicalPlanet Discord community via my linktree](https://linktr.ee/logicalplanet) to discuss this and any other LogicalPlanet projects, upcoming projects, ideas and anything else related to LogicalPlanet.   

**[https://www.logicalplanet.com/](https://www.logicalplanet.com/)**
email me at [logicalplanet3d@gmail.com](mailto:logicalplanet3d@gmail.com) 

---
**Revisions and Updates**
I occasionally update and revise my designs. When I do, I’ll document the changes here. Check back periodically for the latest revision notes or if you’re experiencing any issues with a model.  

2025-06-10: I have added non-AMS versions of the lid and switch plate.



puzzle box

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PuzzleLock Box — Lock and Puzzle in a Box

Hand Grenade Cryptex — Configurable 4-digit puzzle container

BinaryBin – 16-Digit Binary Coded Lockable Container