How To Make An Induction Gun (Bolt Heater / Buster)

  • Published on Apr 22, 2019
  • Link to wiring diagram & STL file for 3D printing the handle:
    Parts ordered from eBay.
    Use the following lines to search for the components I used in the video:
    "ZVS induction heater 1000w" - Induction heater with fan, 12-36VDC, 20A
    "Switch power supply 24v" - Power supply, output 24VDC, 33A
    "buck converter lm2596 adjustable" - Buck converter. Used to drop the voltage from 24v to 12v to drive the relay & LED
    "12v 40A relay" - Basic automotive style 12v relay (recommend buying a 24v relay because it would eliminate the need for the buck converter. Note: if doing the aforementioned replace the
    1kohm LED resistor with a 2.2kohm resistor)
    "1/2watt metal film resistor" - (either 1kohm if using the 12v buck converter, OR 2.2kohm if running the LED directly from the 24v PSU)
    "push on-off latching switch" - basic latching switch
    "5mm LED mount bezel" - used to mount a 5mm led to the enclosure
    "5mm led red" - The LED I used was rated for 3.2~3.8v and a max current of 20ma
    "8GA wire" - Insulated 8gauge copper wire (I used about 3meters (or 10ft) total length)
    "c14 socket" - look for a C14 socket with an integrated fuse holder.
    "5mm fiberglass sleeving" - I bought sleeving with an internal diameter of 5mm. Buy about 2meters (6ft) worth (its cheap)
    "Split Conduit" - Split cable sleeving to fit over the 8GA cables that go to the handle (20mm or bigger dia, 1.5m long)
    "female spade terminal crimp yellow" - Used to connect the 8ga cable to the relay.
    "3 core mains cable" - I used less than 0.5m (1.5ft) rated for 240vac, 10amps
    "cable gland PG9" - quantity: 4
    "5mm copper tube" - 5mm dia, 500mm long (1.5ft) I used this to make the 2nd smaller coil in the video
    Music: Say Yeah - Topher Mohr and Alex Elena:
  • Howto & StyleHowto & Style

Comments • 237

  • Schematix
    Schematix  6 months ago +16

    Verbal typo at 19:52. To clarify: THIS induction heater won't heat non-ferrous metals. It's just not powerful enough. For heating non-ferrous metals like alloy, brass.etc you need a more powerful induction heater and also the coil frequency plays a major role when heating non-ferrous metals. Sorry for any confusion! - SCHEMATIX -

    • James Wright
      James Wright 6 months ago

      I'm pretty sure it will heat up the brass and aluminium. Please do a follow up video testing it.

    • Jakob
      Jakob 6 months ago

      Nice build.. I am a noob on the matter and its more the concept that appeals to me... so pick up a cheap edition that cost around 3.5USD and been playing with it the last couple of days,.
      Was planning to make some recording with thermal to show how the heat transfers and I atm I run it on an adjustable power bank that tops out around 80watt, but for proof of concept and small metal pieces its work brilliantly..
      form a 3.5USD product it is able to make fx a 5mmAllen Key completely red glowing, solely from a USB(DC) powerbank..
      DP my bad.
      Have you validated what kind of watt you are able to deliver with your setup and if it's loyal to spec' hence 1000w.
      would be very easy to put a basic watt-screen in your big casing and also give you a good indication when its in fact heating and when your holding it ideally on the mark' as that can vary greatly and here that amp current-info value is a good indication, for when its done heating and close to topvalue as it will then start to go down' and you don't have to hang butt naked in no mans land, if its heated or not or start looking for glowing identification' that can be difficult to see under some scenarios.

  • Z Ack
    Z Ack 9 days ago

    Praise jeebus its not another hindi indian derka berka derka dudes where they start out and say 5 words in english then nothing but hindi after all with english titles and description and their name is something like american tech 1 .. bastards need to stop that shit.. and trying to scam elderly Americans over the phone..

  • Joe Citizen
    Joe Citizen Month ago

    Great video ... did you mention what the duty cycle is?

  • Muse
    Muse Month ago

    Roughly, how much does this project cost?

  • jwmassaro
    jwmassaro 2 months ago

    What case did you use for this?

  • Adam Payne
    Adam Payne 2 months ago

    I like it! Very cool design. Living in the north eastern US, everything automotive is rusted solid in a matter of hours. If I made one myself, I'd like to integrate a momentary switch into the handle to throw the relay as I'd be afraid forgetting it was running might cause a meltdown.

  • lostintime86
    lostintime86 3 months ago +2

    can I recycle an old stove to make this?

  • Hona Wikeepa
    Hona Wikeepa 3 months ago

    Kia ora bro. I'm going to make one.

  • Jared
    Jared 3 months ago

    Thanks bruv

  • Kelly Keeton
    Kelly Keeton 4 months ago

    Did you ever find any formula to making your own coils for it, I know you recycled the original coil, i have been testing making my own coils out of standard 110v solid core I am causing the coil to heat up. how is your coil temp with nothing in it.? have you tried making smaller bolt sized coils? also your extension cable I found if it gets twisted up i pull more current and make eddy in the loop which isnt good..

  • Jimmy Favereau
    Jimmy Favereau 4 months ago

    aWsome thanks :D

  • InductionheatChina
    InductionheatChina 5 months ago

    Very nice job and video. But I have the 2kw induction heater air cooling with handheld heat head. buy from my web.

  • Harry Chestnut
    Harry Chestnut 6 months ago

    To my understanding you need a collapsing and expanding flux field to induce emf. Can you help me understand how DC can do this?

    • Schematix
      Schematix  6 months ago

      The induction heater outputs a high-frequency (around 40khz) square wave into the coil. If you need more info Google is your friend :)

  • onemorebastard
    onemorebastard 6 months ago

    cool vid broken down nicely. How much did it cost (roughly.)?

    • Schematix
      Schematix  6 months ago

      Roughly $120USD all up. Or about $5 million NZ pesos (sarcasm about exchange rate) ;)

  • MissMarta Nelson
    MissMarta Nelson 6 months ago

    Very well explained, thank you. You have the ability to teach a concept well.

  • Art Connolly
    Art Connolly 6 months ago

    Awesome video

  • Lazlo
    Lazlo 6 months ago +1

    Leave it up to a New Zealander to figure something like this out! :)

  • JPVG- JustinPlaysVideoGames

    Fack you British tea sipping pinkie up holding "proper speaking" American flag copying "aluminium" head ass saying bitches if you make fun of one more American I will personally come to your castle and shoot a roman candle in your facking tea. Try me hoe.

  • JonEilertsen (HellsatanX)

    so basically buy it? ok, gotcha

  • ɑʟpʜɑ ɱɑсʜɪиɑ
    ɑʟpʜɑ ɱɑсʜɪиɑ 6 months ago +2

    Brilliant idea. I was enthralled throughout this entire video. Subscribed!

  • Dragon Slayer Ornstein
    Dragon Slayer Ornstein 6 months ago +3

    "Subscribing is free" sir, still have to pay for my internet.

  • Brian Smith
    Brian Smith 6 months ago

    Stick your dick in the coil.

  • Brian Smith
    Brian Smith 6 months ago

    Congratulations, you have built an induction cooktop.

    • Schematix
      Schematix  6 months ago

      If you can manage to use your kitchen cooktop in an engine bay to heat a bolt. Please post a vid. Would love to see it ;)

  • Nikkove Wolfe
    Nikkove Wolfe 6 months ago

    1:01 shit! That's a lot of fucking oil. What are you trying to do; lure in American military?

  • Dan Bowkley
    Dan Bowkley 6 months ago +1

    Measure the resistance of the 12v relay coil, put an equal resistor in series with the coil, presto now you have a 24v relay.

  • Brendan White
    Brendan White 6 months ago

    This is a fantastic little tool. I could do with something similar when replacing the AFR sensor on the car. I would add protection to the Relay to prevent Back EMF from damaging the Buck Converter.
    Unfortunately this is not a good DIY project in Australia due to our laws about mains power and requiring a qualified electrical contractor to do any wiring. Unfortunately, no matter how talented someone is, this makes it prohibitive to do as DIY here.
    Thanks for the informative and well laid out presentation video.
    That insulation twisting trick works really well on finer gauge cable as well. I recommend it as not only does it twist the cable well, it avoids oils from the skin getting on the cables.

  • H. Fox
    H. Fox 6 months ago +2

    Alternatively you could have strung two relay's together in series for the coil and parallel for the contacts and doubled the amp rating of your control circuit or not hooked in the other relay up and effectively use it as a ballast.

  • george1francoeur
    george1francoeur 6 months ago


  • Maltfalc
    Maltfalc 6 months ago

    5:06 *line

    • *****
      ***** 6 months ago

      It's live

  • James Powell
    James Powell 6 months ago

    Well, thanks for sharing your knowledge with us.

  • Timothy Whieldon
    Timothy Whieldon 6 months ago

    induction heaters will melt just about anything conductive, gold and silver are not magnetic but it will melt it, it will not melt brass or copper though, not sure why, its not about magnetism

  • Andreas Hatz
    Andreas Hatz 6 months ago

    I would have just put a 100 ohm resistor in series with the relay coil on 24V supply. Could have saved the whole voltage conversion cost.

    • Schematix
      Schematix  6 months ago

      Actually, in this senerio, it's better to measure the resistance of the relay coil. Then install a resistor of the same value. It would also have to be a 2W resistor. I keep a whole bunch of buck converters on hand. They are literally $2 each. Besides all this buying a 24v relay is the real solution.

  • Nathan Dean
    Nathan Dean 6 months ago

    well you didnt buy from then ?

  • Jakob
    Jakob 6 months ago

    Nice build.. I am a noob on the matter and its more the concept that appeals to me... so pick up a cheap edition that cost around 3.5USD and been playing with it the last couple of days,.
    Was planning to make some recording with thermal to show how the heat transfers and I atm I run it on an adjustable power bank that tops out around 80watt, but for proof of concept and small metal pieces its work brilliantly..
    form a 3.5USD product it is able to make fx a 5mmAllen Key completely red glowing, solely from a USB(DC) powerbank..

  • Anthony Volkman
    Anthony Volkman 6 months ago

    I love ZVS drivers and induction heating!

  • Morty Smith
    Morty Smith 6 months ago

    That’s way too much oil, be careful of the oil spitting on you!

  • Steve Hill
    Steve Hill 6 months ago +4

    luv the mousecateer ears whilst you were talking ----- sorry that's the background behind you.

  • just_noXi
    just_noXi 6 months ago +47

    How to make an induction heater: 1. buy induction heater.

    • Henri Naths
      Henri Naths 9 days ago

      Depends what you want out of life.. To learn how to make stuff or learn how to consume stuff. The choice is clear

    • WannaDIY
      WannaDIY 2 months ago


    • lostintime86
      lostintime86 3 months ago

      I think making it costs much less than buying one.

    • Caddy Guy
      Caddy Guy 5 months ago

      Ya, not exactly what I was looking for.

    • Jerry ignacio
      Jerry ignacio 6 months ago

      Just buy one. The fun is heating stuff up.

  • Ken Smith
    Ken Smith 6 months ago

    Copper directly connected to Aluminum creates complications and results in a fire when used a great deal.

  • Jim Marriott
    Jim Marriott 6 months ago

    Just received an induced thought convincing me to attempt forwarding thoughts a considerable distance by induction.
    True flat line DC won't induce the voltage to force the current you're looking for. The stable magnetic field is missing the movement of the lines of force necessary for induction. To work efficiently with all conductors the magnetic field needs relative movement with the item being heated. The current is the easiest place to get moving. In order to lower the voltage to a safer level a transformer is a cheap solution. A transformer can serve double duty as an isolation transformer by removing the reference to ground that's found on a 120V systems neutral conductor. secondary Electronic control of AC frequency is a nice touch. High frequency can really heat things up in some situations. The spiral wound coils of the heater can serve a purpose if close together to limit current by counter electro motive force to almost zero when there's nothing utilizing the field. Just a few things to consider. Peace and good luck to ya.

    • Jim Marriott
      Jim Marriott 6 months ago

      @Harry Chestnut Hi Harry, your brain serves you well questioning DC at an Induction party. The Induction Heater is a self contained unit that is DC powered. As you thought, induction needs relative field movement. The heater must output current that has movement, a frequency. The current's direction does not have to alternate for magnetic induction to work. The heat is produced by Eddy Currents and Hysteresis Losses. There's much to share and discuss on these types of phenomenon. It happens to be my 5th day without sleep and I usually get to sleep before day 4 is over so I apologize for not doing a better job. I'll leave a well spoken example for your consideration; Doc Schuster Magnetic Hysteresis. I listened for a few minutes and his theory sounded a lot like English so good luck. Thanks for asking the question. Time to crash. Adios.

    • Harry Chestnut
      Harry Chestnut 6 months ago +1

      Can you help me understand how he is using this ? So to my limited knowledge of electron theory the magnetic field is to stable to induce a current with DC, so what is melting these bolts?

  • Serjoprot
    Serjoprot 6 months ago

    Nut buster

  • PandaMan
    PandaMan 6 months ago +12

    it would definitely untangle those earbuds, you just didn't turn it on

    • Scott
      Scott 4 days ago

      Wont do Nothing to the earbuds , not enough of a conductive load

  • clive lambert
    clive lambert 6 months ago

    can't you just go buy a induction gun?

  • Danny Wood
    Danny Wood 6 months ago

    Nice video, I've been thinking of making something similar for a while. One thing you could have done differently is use a resistor instead of that buck converter for the relay power supply, as you are going 24->12 you just need a resistor the same impedance as the relay coil in series (of sufficient wattage).

  • Edifier Bass
    Edifier Bass 7 months ago

    Nice but not a typical Diy for normal person, kinda difficult and expensive , i was looking for easy ,quick and cheap way of doing things ; but good job

  • Chrissy B.
    Chrissy B. 7 months ago

    excellent. I know fa about electricity. but I learned a lot watching this, so thanks. One question. You didn't want to go into the effects of having more coils in the copper tube, that's fine. But very briefly, do more coils make the induction stronger or weaker?

    • Chrissy B.
      Chrissy B. 6 months ago

      @catch22frubert thanks

    • catch22frubert
      catch22frubert 6 months ago

      The more turns you have, the stronger the electro magnet, as I understand it.

  • Skavies
    Skavies 7 months ago

    I used to think the big difference between Imperial and Metric was a simplicity issue. Who wants 10:1 when you could have variable ratios going form 2:1 (fractions of an inch) to 12:1 (Inches to feet) to 3:1 (feet to yard) then deviating to 5280:1 (feet to miles) and while it made much more sense to use 10:1 for everything, there's some satisfaction in knowing the rest of the world is too stupid to understand simple measurements, but then I figured out everything was just a dick waving contest. Now I know it's simply because 10.16 centimeters sounds a hell of a lot more impressive than 4 inches.

  • Dagaroth Blackrose
    Dagaroth Blackrose 7 months ago

    I cringed when I saw you twist the wire ends and put them on the power supply. Use Ring lugs, they work the same as those spade connectors, and you wont have to worry about them coming back off or breaking like the wire will eventually do when you use it like that

    • Schematix
      Schematix  7 months ago +1

      In my videos, I try to keep the equipment needed for construction to a minimum. As an example not everyone has a 3D printer, So I try my best to come up with alternative solutions. (Sometimes it's unavoidable) As an example, I doubt most people would have a crimping tool capable of crimping an 8ga wire. So I showed a walkaround to the problem. On the flip side, I'm sure people who have invested in such a crimper would figure out when to use it or why'd they buy it in the first place?

  • James Hillmer
    James Hillmer 7 months ago +1

    Cool build man! What do you think about using a DPST instead of the relay? Good idea using the relay to trigger the second parallel circuit though.

  • zyxwvutsrqponmlkh
    zyxwvutsrqponmlkh 7 months ago +1

    Down-voted for hating on freedom units.

  • Fixing Fixation
    Fixing Fixation 7 months ago

    Here’s a fun experiment: put the magnet on the end of a bolt like you had it in the video and heat it with the induction gun until the magnet falls off.

  • Danill Time
    Danill Time 7 months ago

    Нихуя не понял,но очень интересно

    ENDSEEKER 7 months ago +51

    Are you cooking that egg or deep frying it?

    • stephane michaud
      stephane michaud Month ago

      paused it as soon as the egg hit the frying pan to see if anyone else thought it lmao

    • William Prince
      William Prince 4 months ago

      Thought something similar

    • Andrew Small
      Andrew Small 6 months ago

      Kewis...... Need some pommes to cook a decent brekkie


    is the coil size critical to his working? could I make a much larger coil? Or is there tuning involved determining the coil size

    • Schematix
      Schematix  7 months ago

      The size of the coil is fairly critical to achieve maximum output. Heating up a bolt to a few hundred Celcius isn't very hard, so tuning the coil isn't strictly speaking necessary. However for melting metals.etc requires much more than just guesswork. FYI: For tuning a coil you'll also ideally need an Oscilloscope & signal generator.

    • Jared Maddox
      Jared Maddox 7 months ago

      There both tuning, as well as "how picky am I", involved in sizing the coil.

  • Sherif
    Sherif 7 months ago +10

    Induction should work on any conductor even gold or graphite

    • ɑʟpʜɑ ɱɑсʜɪиɑ
      ɑʟpʜɑ ɱɑсʜɪиɑ 6 months ago +3

      Nick knows his stuff! Schematix should see this.

    • Nick Hill
      Nick Hill 6 months ago +4

      Yes. Induction heaters work by inducing an electric current (eddy current) in the work piece. It should heat aluminium or copper faster than steel or stainless. Keep your gold and silver rings well away from it, especially if on your finger. SERIOUSLY that is DANGEROUS!.
      Also, the cables leading up to the trigger should be twisted and held tight together or you will lose a lot of energy from magnetic loop losses.

  • Dmitriy Mod
    Dmitriy Mod 7 months ago

    why are you so cool

  • Garry Clelland
    Garry Clelland 7 months ago

    Lovely build , well crafted , liked and subbed .

  • Dan Gar
    Dan Gar 7 months ago

    you need to clean your cast iron pan man that thing rusty

    • Brapamaldi
      Brapamaldi 6 months ago

      dont be silly, it adds to the flavour and puts extra minerals to the food

  • Benny Lloyd-Willner
    Benny Lloyd-Willner 7 months ago +4

    Good video, I don't think though you need to be so precise with decimals when telling the temp since it doesn't look like you changed emissivity between IR measuring a shiny bolt and then the insulation. It is more like temp on bolt = "pretty hot", and the insulation "not so hot"

  • John Wick John Wick
    John Wick John Wick 7 months ago +21

    You can certainly induction heat non-ferrous metals like brass aswell. While not as effective as iron or steel because of no heating due to hysteresis losses and relatively low resistance in the material itself, it's definitely possibly, what really matters is if the work piece is conductive or not.

    • James Powell
      James Powell 6 months ago +1

      I think he said that didn't he? You would just need more heat.

    • Jared Maddox
      Jared Maddox 7 months ago +1

      Yep, you could even induction-heat salt water if you really really wanted to.