I turn a Stainless Bolt into a Combination Lock

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  • Published on:  Sunday, July 14, 2019
  • 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 :-)

    My Patreon Page:

    My PayPal:

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  • Source: https://youtu.be/OyhfQYHnJuM


  • Ra Fa

    Ra Fa

     an hour ago

    best thing i have seen in my life

  • Black Panther

    Black Panther

     2 hours ago

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

  • Angel Mora Lopez

    Angel Mora Lopez

     3 hours ago


  • Sean Colonna

    Sean Colonna

     18 hours ago

    Your level of precision is next level!!

  • xM Fx

    xM Fx

     19 hours ago

    Next Vid:
    Turned a computer into a IPhone 11

  • kslagley



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

  • СССР



    Любо дорого смотреть !👍✊

  • eklypse13



    you make this stuff look easy.

  • Rubens Costa

    Rubens Costa


    Man, you deserve 10M of subscribers

  • MrEagle8697



    Always a treat to watch the best do their thing

  • Sandesh Bhalke

    Sandesh Bhalke


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

  • 醒帅


     2 days ago


  • Mr. Screw

    Mr. Screw

     2 days ago

    Amazing Sir



     2 days ago


  • Leice Greici

    Leice Greici

     2 days ago

    Com umas máquinas dessa e facio

  • manuel alfaro

    manuel alfaro

     2 days ago

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

  • D W

    D W

     2 days ago


  • sivaraman B

    sivaraman B

     2 days ago

    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

  • Robin Rides

    Robin Rides

     2 days ago

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

  • Cutylexa


     2 days ago

    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