Combination Vault - Combination Lock Sound

I’ve always like the way a combination lock dial sounded as it was turning. So I though I would design and print the parts required to do this with the “Vault with Combination Lock”, by “Rocco’s Stuff”. None of the original file from “Rocco’s Stuff” were modified in this design. They are not included here, so you'll have to go to the original model for the rest of the files in order to build the complete vault.

Files designed to complete this task:

Flipper-tray.stl – Tray that hold the Flipper-disk. This part fits in the large hold in the center of the Acrylic plastic on the front of the vault. It rests on the center core of the door frame. I used double sided sticky tape to hold it in place, and keep it from spinning. I did not glue it in place, as I thought I may want to remove it in the future.

Flipper-disk.stl – This is the .stl file that make the noise.  It fits inside the Flipper-tray. You have to add a small piece of plastic “which I'll call a flipper" to the Flipper-disk to make it work. I used a piece of plastic I cut out from from a plastic container I got pastries in at the grocery store. You can use any other flexible piece of plastic. The plastic needs to be pretty flexible for it to make the clicking sound, but strong/stiff enough to hold up to use. The dimensions of the piece of plastic I made was an “L” shape that was 0.1mm thick, and about 10mm long. The plastic was placed in one of the groves on the Flipper-disk.stl with about 2mm of the plastic sticking out the side of the disk. When the disk rotates it hits on the edge of the Flipper-tray and make a clicking noise. I have slots for up to 4 pieces of plastic around the disk, but you may only need 1, depending on how much noise you want the spinning dial to make. I held the small piece of plastic in place with a drop of super glue.

Dial-dewobbler.stl - This file is not used in creating the clicking sound. I have add it here because I though someone may not want to create the clicking effect, but may want to stabilize the combination wheel. I found the wobble in the wheel to be a bit annoying so I made a disk that you place behind the wheel to help stabilize it.  It does not need to be glued in place.

How I made, and printed the parts: The files were made in Tinkercad, and printed on a Prusa MK3.9. I used PLA, but almost any filament will work. I used a 0.40 mm nozzle, at 0.20mm layer height.

Below is a short video with the sounds being made as I turn the dial on the vault.

The only difference is that 3D printed parts are added to have the rotating combination wheel make a clicking sound as you turn the dial. (No file from the original design were modified.)