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/diy/ - Do It Yourself

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>> No.1092270 [View]

>>1092173
>>1092218
Hardinge HC lathe. That one doesn't have the 8 position carriage stop however, which is a damn shame. Awesome machines at making a lot of the same part in a hurry.

>> No.1090805 [View]

Have a grabcad link

https://grabcad.com/library/cryptex-8

>> No.1089082 [View]

>>1088978
At least 3

>> No.1088635 [View]
File: 257 KB, 1533x832, download_20151218_223604.jpg [View same] [iqdb] [saucenao] [google]
1088635

And one of the first renders of the cryptex.

>> No.1088633 [View]
File: 1.20 MB, 3024x4032, image-20160104_194231.jpg [View same] [iqdb] [saucenao] [google]
1088633

>> No.1088630 [View]
File: 1.13 MB, 4032x3024, image-20160104_201222.jpg [View same] [iqdb] [saucenao] [google]
1088630

>> No.1088629 [View]
File: 3.06 MB, 3024x4032, image-20161028_231141.jpg [View same] [iqdb] [saucenao] [google]
1088629

A few pics of the machining process.

>> No.1088520 [View]

>>1088342
lol
>>1088361
somewhere between 30 and 40 hours, but if I did another one it would be far less time spent.
>>1088432
Now I plan to use this in a DnD campaign.
>>1088438
You are correct, they are evenly spaced. Now that you point out the alignment issue I should have done 5 decoys plus the real slot. As it is the alignment of the characters isn't perfect which will help hide that, but mostly its that the slots are 0.188 wide and the teeth are 0.17 at their widest and taper to a significantly smaller face size where they would actually drop in. 390k is still a lot more secure than a 4 ring numeric bike lock which is only 10k and are still a reasonable impediment.

If I make any others I will incorporate a properly divisible spacing. Possibly I might also change the acetal slip ring to some metal.

>> No.1088335 [View]

>>1088327
With steels it all really comes down to what alloy you are machining. 12L14 and 1215 are super machinable steels, but something like 1045 or 4140 have more carbon and other stuff mixed in which makes them stronger but tougher to machine. You can do a lot with HSS tooling in steel, but carbide can be run far faster and will deal with harder materials better.

>> No.1088307 [View]

>>1088304
Thanks. This was not a cheap project for me as I wasn't entirely sure how I wanted everything. Originally it was going to have brass character rings, because brass looks fucking awesome, but the 0.125x4 inch bar was 0.115 in the middle of the bar and 0.135 on the outer edges. I would have had to machine it flat first and then I would be lucky to have the sheet be 0.1 thick, too narrow for the stamps I had.

I've learned a lot about material selection from this project.

>> No.1088296 [View]

Lightly rough up the bottom with some 100-150 grit sand paper and just glue it down with super glue. Or go to the hardware store and buy outdoor mounting tape, which is the same kind of tape they use to adhere skyscraper windows in place. If you go with the tape, clean both surfaces to within an inch of their lives with acetone and then don't touch the surfaces with your grease fingers.

Bonus technique, make an expanding arbor that will thread into a t-nut and put a flat head bolt in the arbor to spread the arbor inside the hole you have in that delrin puck. Like a collet in reverse.

>> No.1088291 [View]

>>1088280
It locks stuff inside it. I do plan to give someone I know that picks locks the chance to crack it. The teeth aren't really rounded, they have a steep taper to them. When I was doing the final filing of the teeth they would set into the slots pretty readily, but now that they are all even I haven't been able to feel any of the slots. That and you have to pull fairly hard to open it means you can't exactly jiggle it while you go through the rings.

It's primarily a novelty. Any properly equipped person could destroy it to get to the contents, sure. The black slip rings are also acetal and if I did switch out the pins for steel ones you could possibly use a magnet to find them and use that to position the rings and unlock it. I did consider using something that would severely reduce the effect of heat on it, but I don't reasonably expect that to be something it should encounter. Acetal lets it slide smoothly and was easy to work with.

>> No.1088276 [View]

>>1088270
TL:DR "Who has questions?"

>> No.1088272 [View]

>>1088269
I personally don't find that extra effort to be worth my time. The alignment on the combo rings needs to be pretty spot on for it to open at all. I have had to fiddle with the rings more than a few times now in order to get it open, and I actually know what the combo is. Everything is a very close fit so that it is nearly impossible to feel what the hell is going on, and if you do feel a tooth "drop in" there is a 4 in 5 chance that it wasn't the actual slot opening. I don't think it needs any further tamper resistance, besides acid would ruin it and then I would be sad.

>> No.1088270 [View]

Who among you seeks to further satisfy their desire for knowledge via long distance textual discourse?

>> No.1088266 [View]
File: 581 KB, 2048x1532, Disassembled Cryptex.jpg [View same] [iqdb] [saucenao] [google]
1088266

The cryptex fully disassembled showing how the lock tube sits in the slot when closed. Also shows the locking notch for the retaining ring at the right end of the mechanism tube. Lastly shows the stack of spacer rings and combo rings laid out.

>> No.1088264 [View]
File: 1.29 MB, 2048x1532, Combo Ring Component Detail.jpg [View same] [iqdb] [saucenao] [google]
1088264

Combination ring disassembled into the outer character ring, the inner slip ring that does the actual locking, and the indexing pin used to set the character for each assembled combo ring.

>> No.1088263 [View]
File: 977 KB, 2048x1532, Assembled Combo Ring Left.jpg [View same] [iqdb] [saucenao] [google]
1088263

The "front" side of an assembled combo ring showing the 4 decoy slots to make manual cracking almost impossible(only time will tell).

>> No.1088261 [View]
File: 886 KB, 2048x1532, Assembled Combo Ring Right.jpg [View same] [iqdb] [saucenao] [google]
1088261

The "back" side of one of the assembled and pinned combination rings.

>> No.1088260 [View]
File: 499 KB, 2048x1532, Spacer Ring Detail.jpg [View same] [iqdb] [saucenao] [google]
1088260

Spacer ring gives the teeth somewhere to stay out of the way and separate the combo rings in a visually pleasing way.

>> No.1088259 [View]
File: 401 KB, 2048x1532, Retaining Ring Detail.jpg [View same] [iqdb] [saucenao] [google]
1088259

Retaining ring for keeping the rings in place while locked

>> No.1088257 [View]
File: 413 KB, 2048x1532, Assembled Mechanism Tube Inside Detail.jpg [View same] [iqdb] [saucenao] [google]
1088257

Inside view of the mechanism tube

>>1088255
1: It's basically a fancy cylindrical puzzle box
2: Have patience, there are detail shots for each component but I can only post so fast

>> No.1088256 [View]
File: 340 KB, 2048x1532, Lock Tube Detail.jpg [View same] [iqdb] [saucenao] [google]
1088256

Lock Tube

>> No.1088254 [View]
File: 460 KB, 2048x1532, Opened Cryptex Display.jpg [View same] [iqdb] [saucenao] [google]
1088254

Opened view

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