I turn a Stainless Bolt into a Combination Lock

In this video i'm turning a stainless steel bolt into a nice little combination lock.

I was always fascinated by those antique combination locks. I really like the design of them. A few weeks ago I bought one from eBay, but it turned out to be a cheap fake copy. I was really disapointed. Well if I can't buy one, then I make one myself. It was quite a challenge to get all the parts done and fit together, but the end result speaks for itself. I'm very happy how it turned out and I'm glad I made it.

I hope you like my work and the video.

Huge thank you to all of my Patreon and PayPal supporters and specially to:

Arthur Beaulieu
prahS Prods
Micky McKay
Adel AlSaffar
Alan Hanson
Amanda Taylor, Esq
Andreswara Hermawan
Andrew Phillips
Dan Williams
Joan Casanovas
Joel Miller
John Romero
Jonas Richartz
Jonathan Heckerman
Marc P
Paul Ambry
Paul Mampilly
Trevor Kam
Vince Valenti
Zachary Grimes


00:00 intro
00:10 cutting the bolt in pieces on the lathe
00:53 making the side plates of the lock
02:14 making the first pin, shaft for wheels (fix side)
03:46 making the second pin, upper shaft (fix side)
04:37 making the third pin, key (movable side)
06:33 making the fourth pin, upper shaft (movable side)
07:16 TIG welding the pins and side plates together
07:35 sanding and polishing the welded parts
07:57 filing the slot for the secure ring
08:16 making the wheels with numbers out of brass
09:16 etching the numbers with ferric chloride
10:52 knurling the whells with the numbers
11:48 making five tiny springs with 0.3mm spring steel wire
12:20 showing the five steel balls
12:24 assembling the wheels with the numbers
12:44 making a secure ring with 0.8mm spring steel wire
13:13 assembling the secure ring
13:21 showing the finished combination lock

Time and costs of this restoration:

I was working on this project over 2 weeks
$5 stainless steel bolt M20x70
$40 knurling wheel
$2 printing the numbers
$15 steel balls and spring steel wire

My camera:
Panasonic HC-V180

If you have any questions about the process, machines i'm using or other stuff, just ask me in the comments. I read them all and i try to reply as soon as possible.

Sorry for my bad english, it's not my language. I try my best to improve my technical english.

Subscribe for more of my content. I'm uploading videos about mechanical stuff, as new creations and buildings and also restorations.

Thank you for watching :-)

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  • Leice Greici

    Com umas máquinas dessa e facio

  • Aleksandr Bagrov


  • Mark StPierre

    That's also his ATM PIN.

  • Pedro Quintao

    Muito bom, foi uma aula de usinagem e fabricação de peças utilizadas uma série de dispositivos! Ótimo ferramental!

  • eklypse13

    you make this stuff look easy.

  • Jabba 2311

    Why is everyone saying “how tf did he do that”I mean it’s simple you get a lathe and a bolt and use dark magic, duh 🙄

  • Lantz Newberry

    Does anyone else find it extremely relaxing just watching the lathe work?

  • Dj kingWavo

    How are you not kidnapped by the fbi yet lol 😂 you belong in a lab 🤣🤣🤣

  • MrEagle8697

    Always a treat to watch the best do their thing

  • kslagley

    Fantastic skills, great lock. You could sell those locks, only need to charge $1200.00 US each for the labor involved.

  • Charles Wise

    This is so finely detailed. You should attempt making, or machining a watch.


    It looks simple but it's hard to work

  • D W


  • Sean Colonna

    Your level of precision is next level!!

  • Don Solo

    Damn the amount of different bits this man must have. INSANE

  • Tom Fergie

    A celebration of human ingenuity. Art, science, skill, pulling together

  • sivaraman B

    I was almost disappointed when I saw the black paint... Im like.. That cannot be the final finish.. And then I see the etching.. And heave a sigh of relief

  • Black Panther

    You know whatI'll rather buy it instead of doing all that😕

  • ASMR Pillow

    where is your PPE ??



  • Project Dan H

    Amazing how clean your hands are 🤯

  • Serikbay Baydaralin

    проще купить чем целый день на смарку😒

  • little boy

    ได้โปรด... ส่งให้ผม1อันได้มั้ย? ? ผมชอบมันมาก.

  • no yes

    OH MAN. I'm 8 minutes in and there's writing on the bottom! Q. Who sharpens your bits? I'm trying to imagine what the Lock Secures. ??? 3 things come to mind, eyesight. electricity. diamonds.

  • Cutylexa

    you videos are the best thing at calming me , and damn that polish job is always on point, glad to see you're going crazy mode too, cheers

  • xM Fx

    Next Vid:Turned a computer into a IPhone 11

  • Ramba Zamba

    So, everybody knows the lock combination. Well done.

  • SSSR

    Любо дорого смотреть !👍✊

  • Jono Spiro

    And he used his restored oil can to lubricate!

  • Tao Zhu

    This process is so elegant

  • Robin Rides

    How to turn stainless steelbolt into lock, uses more brass from brass rod than actual stainless steel 😅

  • Nassir Almandalawy

    حقيقة ما أثارني هو تصويت عشرة آلاف شخص على عدم أعجابهم بهذا الرجل المبدع رغم أحترامي لقرارهم

  • Midnights & Mornings

    You should make your own tools. Ratchets and sockets...pry bar breaker bar

  • ImConstantlyConfused

    @ 10:57 when you added the knurling, are you using the oiler you restored in a previous video?

  • puirYorick

    This channel popped into my feed about a week ago and now I'm all caught up. Going into withdrawal now...

  • Desks Sksksks

    and u don't get recognized enough

  • Tim Dexter

    53247. Now i know it.

  • manuel alfaro

    14:38 What kind of printer you used for print the numbers, laser or Inkjet 123456789?

  • Rubens Costa

    Man, you deserve 10M of subscribers

  • Jay Polomsky

    I love youtube. I mean, I watch a lot of stuff on youtube. Stuff relating to my hobbies, that I love and cherish. But by far, this is the best video I've ever seen on youtube...I never subscribed to ANY channel (at least not knowingly) but I will to this. This is perfect.

  • pacotimeable

    Congrat, were you a watchmaker? you have a clean and perfect care hands and nails... that´s weird

  • Observantcheesehead

    But where can I buy one?

  • Dall Tex

    Got a click out of one.....

  • Ra Fa

    best thing i have seen in my life

  • Sandesh Bhalke

    my mechanics : * goes to hardware shop *Guy : You need the bolt or the lock?my mechanics : yes

I Make A New One! Making new parts on lathe & mill for restoration projects (compilation part 1)
Antique Rusty Micrometer - Precise Restoration
Making a Mini Machete from a Stainless Bolt
1940's Corking Machine Restoration
Handmade Silver Play Button - No Power Tools
Making a Coin and a Chunk of Silver into a Stunning Ring
1930s German Spiral Jack - Perfect Restoration
1930s Rusty Metal Shear - Perfect Restoration
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