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Super Simple Mini Gas Forge
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- Опубликовано: 2 янв 2016
- This is an easy one, but can really do a great job getting the steel up to temp for heat treating. I used one map gas and one propane, but two propane bottles would work well too, just take longer.
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very concise and straight to the point. one of the best videos I've seen for this subject, thank you.
You have IFB that stands for insulating fire bricks. They are somewhat softer and prevent the heat from going through. The regular fire bricks hold the heat. I checked with three different brand stores and finally had to go online to find which of a Lowe's I could find these at. Had to go to the next town over because nowhere in the city had them. Others have said that the steel will be the proper temperature when it becomes non-magnetic. They keep a magnet nearby attached to something so they can touch the steel to it while heating to see if it's become non-magnetic. Oh and also someone suggested to use the MAPP gas which is hotter. You will also need the torch made for the MAPP.
Brilliantly simple and effective. That last comment made me laugh. Maybe heat treatment is not the right hobby for people who 'don't like fire'!
Oh I'm definitely making one Just like this! Thanks for the video. By the way the video is very professional looking. Great lighting. I bet your shop is one you could just get lost in for hours!
For tempering, I've taken to using one of those small butane torches. I heat the back edge of the knife and the heat spreads out towards the cutting edge. You can actually let the back edge get just a little bit blue/purple while the cutting edge is just the right straw color. Takes a bit longer than with a larger torch, but you have that fine control.
When making my forge, I adjusted the bricks to close the opening to 1 X 2 inches. The blade just fit into the opening. Worked really well.
thanks for your time to demonstrate your forge
You do a great job explaining things and keeping it simple
Very cool John! I built a temporary forge for heat treating our of a coffee can and a propane torch. It work but yours seems much more efficient and safer. Thanks for the video man.
Nice, simple and temporary! Those who don't like fire you say...... Well .... I'm not one of those. Have a great year John.
Thank you brother! Amazon sells the bricks. Simple solutions. Especially for a once in a while project.
There is a correct way to decide when a blade is hot enough to quench. Heat the blade up until it will not be magnetic. Just touch a magnet to the steel. If it sticks heat the blade more. If it does not stick you are at the right temperature to quench the blade.
As far as I'm aware the non-magnetic point is just used as reference but the right temperature is slightly above it
Non-magnetic is around 1,400 most steals require a round 15 to 1600 with about a 4 to 5 minute soak time at that temperature. At around 1,400 when it becomes non-magnetic it should glow a cherry red. You want to go a couple shades brighter.it's a good idea to have the lights dimmed so that you can see the color properly.
Great info. Been trying my hand at making knives lately, and I've been heat-treating by burning scrap wood in a Weber grill. It works, but isn't very efficient, or easy. Can't wait to try this. Thanks!
That's really cool! Matt and I have been playing with foundries lately. We've made a few coffee cans, a garbage can version and a bucket. Lots of fun! Great to get a quick and simple tempering lesson thanks!
+McGinn's WoodShop
Gotta love the hot as hell steel spitting spacks :D
I really enjoy watching your videos. Thanks John.
YOU just saved me 200 bucks! Thanks. That is so simple I love it. Thanks again.
Brilliant! Right now I only need a heat source for annealing and hardening knives and this will be perfect. Thank you for the idea.
Nice job. Simple and clever, and appears very effective....
Nice setup. Now you've got me looking at heat treating videos.
Thank you for this video. I've been wanting to try knife making for a while but heat treating was the one thing stopping me from doing so. I'm hoping to practice heat treating now by using this simple yet effective plan for a forge. I also follow a lot of knife makers on RUclips. My favourite to follow being a man called Walter Sorrells. He is a master knife and sword makers. He has a lot of tutorial videos on knife making using all level of available tools so would definitely be worth looking up, if you don't already know of him. Just a word of advice learnt from his videos, when he tempers at 400 degrees Fahrenheit he leaves the knife in the oven for an hour. Maybe worth looking into the benefits of giving the metal the full hour to temper?
Really enjoy watching your videos! Keep up the great work, look forward to seeing more from you, especially the knife videos. All the best for 2016 from Scotland :)
+ZERO ONE
I watch Walter's videos - he knows his stuff.
As for tempering, it really depends on the size and thickness of the steel. For a thin blade like I did in this example, 20 minutes is long enough.
Please keep making knife videos! I enjoy the hell out of them! I'm going to attempt one soon. you have great content and a great way of explaining the process! Well done John!
I searched "lighting farts", and somehow I'm now on my eighth or ninth heat treating video. I love RUclips.
Who doesnt like fire.. But i digress. This setup would probably work for me. So i put this vid in my todo playlist. Thanks for sharing and have a great 2016!!!
+Willem Kossen
Thanks!
I drilled a hole in a large light weight breeze block,and it worked quite well. It didn't explode:)
Neat. Like how you used used cooking oil it has many uses. It does smell just like burning seeds is a joint. But way better than motor oil and I bet safer.
Cool methodology on DIY heat treating!
Thank you for the video. Just got my fire brick and I'm going to try to double the length. Great vid.
Excellent little set up John, and very effective....one day ;)
Take care
Mike
+Mike Waldt
Could take a shot at making some turning chisels :)
This looks like a neat, temporary setup for hardening machinist tools from mild steel.
Whether it's wood, metal, or...oh, I guess those two are enough for starters! Anyway, I enjoy your videos very very much. You seem to know enough about the subject to do a good job and do it right. Even when you make a mistake or two, you own up to it, correct the mistakes, then move on. Oddly, even the way you handle mistakes is entertaining and often, even funny! I just want to let you know that your efforts are expanding my knowledge and skills substantially. I have a couple technical degrees, all bachelors or less, but I don't believe I am particularly knowledgeable in areas I have studied. I just know enough to do a few things.................
(well, I did start-up several new companies before my saga of setbacks began!)
.......................and, because of some handicaps resulting from illnesses, genetics and bad luck, I have not been able to reach the highest levels of knowledge and skills I set out for when I was young. Thus, your projects and instructions are a great help for me! Thank you, sincerely, for helping me overcome some of the shortcomings I have due to the health issues, and for sharing your knowledge and experience with me and others like me. I guess I think of myself as an unofficial representative of those who read RUclips and receive happiness and achievements by using your knowledge and the experiences you share as you go through the projects you develop and build! I hope you will continue to do more and help those of us who need just a little help and hope because we had bad luck somewhere along the way and couldn't achieve the goals we set for ourselves, but can use your ideas and examples to help them "over the hump" and make the projects, using your videos sharing l your achievements. I tend to say too much, but, I can always find satisfaction knowing I didn't say too little! Your plans and videos are worth much more than you charge, as I hope you will see when I begin to post videos of my own later this year showing that a blind (inherited poor eyesight and lost retina)' wobbly (vestibular system failure), marginal (lost kidney to cancer), restricted (diabetes), often bed-ridden and inconsistent fellow (combination of these and other illness-weakened
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Whether it's wood, metal, or...oh, I guess those two are enough for starters! Anyway, I enjoy your videos very very much. You seem to know enough about the subject to do a good job and do it right. Even when you make a mistake or two, you own up to it, correct the mistakes, then move on. Oddly, even the way you handle mistakes is entertaining and often, even funny! I just want to let you know that your efforts are expanding my knowledge and skills substantially. I have a couple technical degrees, all bachelors or less, but I don't believe I am particularly knowledgeable in areas I have studied. I just know enough to do a few things and, because of some handicaps resulting from illnesses, genetics and bad luck, I have not been able to reach the highest levels of knowledge and skills I set out for when I was young. Thus, your projects and instructions are a great help for me! Thank you, sincerely, for helping me overcome some of the shortcomings I have due to the health issues, and for sharing your knowledge and experience with me and others like me. I guess I think of myself as an unofficial representative of those who read RUclips and receive happiness and achievements by using your knowledge and the experiences you share as you go through the projects you develop and build! I hope you will continue to do more and help those of us who need just a little help and hope because we had bad luck somewhere along the way and couldn't achieve the goals we set for ourselves, but can use your ideas and examples to help them "over the hump" and make the projects, using your video sharing of your achievements. I tend to say too much, but, I can always find satisfaction knowing I didn't say too little! Your plans and videos are worth much more than you charge, as I hope you will see when I begin to post videos of my own later this year showing that a blind (inherited poor eyesight and lost retina), wobbly (vestibular system failure [loss of balance]), marginal (lost kidney to cancer), restricted (diabetes), often bed-ridden and inconsistent fellow (combination of these and other illness-weakened physical areas needed to work with wood), to mention a few handicaps which many would accept as reason enough to give up and slowly "fade away". I hope that whatever I, and others I have presumed to speak for, can do will reward you and others like you here on RUclips, and make your efforts and "gifts" worthwhile to you and to them. (Like I said, I can really string some multi-level words together, and I am just too tired to fix it!)
i first time see your video.. and you remind me to rubber band guy.. slingshot channel.
In college I went to a place that made fiber optic components and while the building in front with all the offices was all high tech the building in the back where they actually melt and pour the glass was like something out of the 1800s, including a similar brick just stacked around the furnace. One guy would reach in there with essentially a giant set of bbq tongs to pull out the crucible and set it down on a stool, where the other guy would pick it up with a different set of tongs and pour it into the molds. When it comes to just getting stuff really hot it's a pretty low tech world.
+krtwood
Keeping it simple works - less high-tech gadgetry to break down :)
Loved it John! Well demonstrated.
+Dave Bardin
Thanks Dave :)
Jesus Christ this is so handy and quick. All the other videos are way more involved.
Thanks for the video! I made this and it works great!! 😁
I was wondering about this in the previous video. Now I want to give this a try. Great vid!
+Make Something
Go for it :)
Awsome Vids.
Great John! I will try this way of hardening steel. Happy New Year.Thankz
Thanks. Simple, easy to use forge
Very effective John !
When tempering, you can heat carefully with a torch from a little bit of a distance and when you see a straw hue change to a purple hue and then quickly change to blue, quickly quench the blade. this is good for 1080 steel and other steels that are close to that grade.
Brilliantly simple idea but I've got to echo baconsoda's comments. When the hell am I going to find time to get out of the shop & back on the hills & forests if you keep coming up with projects like this?
So what kind of torch heads are those? As far as I can see the propane one is a pencil flame torch? Bernzomatic calls it the UL2317, correct?
I'm trying to make this myself and the torch heads are my final snag.
Thank's for the vid.i wanted a simple solution to make a couple of travisher blades without spending too much:)
certain steels will only harden in certain liquids. Walter sorrels has informational videos on the subject that are good
Cool oven, thanks.
love it. Great follow up to your knife video.
This is a really good idea :) I'm probably going to give it a try.
Simple is good. Thank you.
Thanks John, very helpful.
Thanks for the knowledge, very nice explanation.
Great lesson!
+Get Hands Dirty any knife videos planned on your side? ;)
+Markus Hoffmann
I'd like to see that :)
+Markus Hoffmann +I Build It I didn't think about that, but I am now :D
Cool, so what happens if you use water instead of oil to quench? Your clarity on that topic would be great, the knife nerd forums wear me out.
+Andrew Klein
Water works, but oil more effectively surrounds and cools the metal uniformly, since it has a much higher boiling point. Water may also cause the metal to crack, if it cools it too rapidly or unevenly.
If you use water it will not work, has to be oil
+Jon Stevens
Anything that can rapidly cool the blade will work, including aluminum plates or even fast moving air for some types of steel.
+I Build It I thought if you cool it with water it weakens the steel I guess you learn something new every day 😀
+I Build It I thought the carbon content of the oil had something to do with the hardening? I really don't know though.
you're a genius
How long does it take to heat a piece of circular saw blade steel up in that (approx), with 2 blow torches going? How many blades can you heat up with them before having to replace/refill them?
I'm tempted to start hunting around for some heat bricks like those and give it a try. Of all the knife making videos on youtube, I've liked all of yours the most. I really love the lack of BS compared to some others.
Very practical. Great info!
Thanks for sharing. Can I ask, how long does a torch typically burn for? I'm super excited to build from your plans but don't want to spend heaps on torches. Thanks!
Would you do a video on making that forge with an electric heater coil. I was a mechanical engineer for company who used electric furnaces to melt Braze Alloy. When the company closed in 2009, I should have taken some of the extra Thermal Couplers, heater elements, and refractory bricks that I used? Oh well...Hind sight and all:~))))) Thank you.Ps: You can get refractory cement at Lowes. They call it Chimney repair Cement, it comes in a 5 pound plastic tub, or at least it did in 2000? Stone 327 Pappy Dave's Knives Pa.
Will the two torches be enough say in a forge twice the size
Could this type of forge be used to form heat the metal before hammering as well?
adorei sua mini forja. Vou replica-la. Obrigado pela idéia.
This is neat. Have you seen my mini-forge video? I just kind of took it to the next level and bolted it together. It's a little smaller than this, but same concept.
+TheGeekPub
I hadn't seen it, but just watched it - nice!
I'll be building a bigger, electric one starting next week, probably spread out over 2 or 3 videos. It will be a real temperature controlled heat treating oven, so fairly involved.
+I Build It I can't wait!!!!
Awsome video brother thank u for the info
How timely, I just designed a fancy small forge 2 days ago; haven't gotten the bricks yet; I assume the 23 on the brick is for 2300 degree F? And how thick is the brick?
+John Zhu
I'm pretty sure they are 2-1/4" thick, 4-1/2" wide and 9" long, which is handy. I do believe the 23 is for 2300. I bought these in packs of 12 from a pottery supply with the intent to eventually build an Evenheat type heat treating oven. I've got all the parts, just need the time :)
Cool Forge =D
hi first gr8 video and super cost effective and simple .
question what grade are the fire bricks (max temperature rating)
many thanks and please keep the simple and cheap knife making tips coming😉
I tried this with the regular fire bricks non insulating I never got this hot enough to where I demagnetize the blade (only used 1torch)... how long does it take for the forge to get to get to the right temperature?
you need the insulating bricks
GREAT VIDEO!
Who doesn't like a little fire ? ;)
Thanks now I know that using brick for fireplace like I did wasn't a good idea... I put 2 torch and my little blad was slightly red and the brick was burning me a lot of time after I turned off the forge. So I think that all the power of my Toch go to the bricks...
Very nice.
one cylinder of gas, enough for one knife to harden it? how many liters is such a bottle?
This is the clearest and simplest explanation of heat treating I saw, thank you very much! (Isn't your last name from Hungarian origins? I know people called Heisz in Hungary.)
+Zoltán Herczeg
Thanks :)
The name originates from Germany, Alsace-Lorraine, so right on the border with France. There are some others that are spelled similarly, like with two "S" on the end instead of the "Z".
Hi I built this forge and it was really good at keeping heat. The only problem I had was my blow torch created lots of ice on the outside. I’m using it outside and using map gas with rothenberger superfire 2 torch. It is cold outside and the flame was full blast, is this normal?
Thanks in advance
Would it be possible for you to throttle the air flow of the forge and or use a simple lower temp torch head or other milder heating element(like a camping stove or sterno even) in such a way that the center would reach a uniform lower temperature for tempering? Test the temp[erature with a scrap peice of metal and refer to the tempering colors of steel chart.? Then you could also use it for annealing too right...slowly lower the heat and all. How insulating are the bricks if you shut off heat and block off the holes and front in other worrd closed off no airflow? Slow enough for annealing? Thin pieces of metal are harder to do my prefered method...heat past austentitic then quickly burying in powder plaster of paris and packing it tight. Thin metals pretty much air quench before i can bury it...cools too quick...so some thing like this would help if that is possible.
Opinions anyone?
I wish you would stop making it easy for us to build knives because I have enough back projects to do without discovering I can get going at a knife with very little effort or preparation. I have old saw blades... I have torches too... and veg oil from making roast potatoes at Christmas... oh dear, right, where do I get those fire bricks?... internet, here I come.
Best Wishes, Brendan.
+baconsoda
I'd love to see it Brendan! I know you would do a fantastic job of it - maybe some turning in there :)
+baconsoda Lowes has Fire Bricks in our area, Lower N.C., USA
+Frank Ingram Thank you Frank, that will help anyone who sees this in that area but I'm afraid I'm in Ireland so it's a bit of a swim. However, it was very kind of you to take the time to help me, I appreciate that a lot.
Best Wishes, Brendan.
+baconsoda I agree, my shop is so cluttered with "to do" projects, I've started ditching some of them. John does make me jealous of all the things he actually gets done.
+dave bryant You will never be able to ditch them fast enough. Just try to get accustomed to a backlog.
Yes now I can heat treat a knife
That looks like a regular wood bit you used to drill the holes in the brick?
Who is this man??
i live in canada as well and i am just wondering where you bought your fire bricks since ive been looking for them and havent found any at a good price
Metal surface in a wooden shop........ Il use it outside lol
Just wondering if the temp on this setup would get high enough for actual metal forging? and not just heat treating> Great video though.
heat treating temp is more than forging temp
what this brick are made of? I can't find them, I don't know what to type on Google :c
I like it.
Thank you.. :D
can you tell me what torch exactly you are using? because there's a lot of them out there
I believe he is using a bernzomatic t8000, not sure what the smaller one is
how do you stop the torch nozzle from melting in the heat?
I tried your design and am having a few problems. I can't get it to heat up on the inside. I only have the one torch right now. Do you have any suggestions.
Woods Lore Put in a second...
which bricks do you use i em a blacksmith from the Netherlands
Where did you get the fire bricks from!!!!
where can i buy torches like that online i am going to build one of these but i need to find the torches like that anyone have a website where i can get those?
SWASTICA! Ilumanati confirmed. Nice forge mate
What is the name of a brick thing?
where did you go to locate the fire bricks? I know Home Depot doesn't stock any.
moofushu tractor supply
Good design, but you don't want turbulence. Too many wannabes are spreading what is becoming an old wives tale, namely that you want a "vortex" type flame as seen in a foundry. Since building a knife requires a relatively precise and spatially controlled heat source, and does not involve a flame heating a cylindrical crucible, the way you built it to start with is actually the right way.
There is a reason that professionally built propane forges do not angle their burners.
FOCUS MASTER!!!!!!! HAHAHAHAHAHAHAHAHAHAHAHAHAHAHA John he looks just like you !!! :P
I like this idea, need to get some bricks.
Fire fire fire.
When you say "Leave it in for 20 min or so", do you mean after the oven has reached 400?
+Michael Duckett
Yes
Playing with the fire....
I'm having a hard time finding firebricks like the ones you have.
Same
+dylan thibodeau Amazon sells them
Lots of options on Amazon. I just looked (11-20-2016).
Nice video John, I ain't got the guts to try it but I enjoyed the video Just the same.