Induction Heating, Oil forges, etc

Having some pretty big hammers has cause a dilemma :P How to heat such large stock efficacy enough to keep them running? I have been looking over the threads of both a ribbon burner and a oil burner type forge and could really use some input from those with experience with either. The target size material I would like to heat would be 3pc. 4" square to 2pc. 6" square around 16" long. Thanks,

For those that might be interested. After a few failed attempts to get what I wanted - a "coaless" coal forge that would heat up any size or shape at specific areas and could be changed to suit the shape and size of an object - I finally succeeded. Using only one burner and 1lt/hr of waste veg oil: After 10 minutes After half an hour This is now my primary forge for blacksmith work and knives. One instead of the three I had previously. The heat rises from the 100mm radius hole where the burner is like a fire pot and heats the steel placed above. The roof is adjustable and cast and I can place the fire bricks to suit my needs.

ok well i did have a post about ready to go and then i hit the backspace key by acident so im going to do the short version lol basicly i want to know if its worth a try to hook up a induction forge coil to a welding machine as a way of making a cheap/fast induction forge, and most importantly less complecated, lol i cant make heads or tails of most of the desines i have seen.

I was talking to one of my friends, and we got to discussing waste oil forges. He noticed a similarity between an automotive turbocharger and the general workings of a waste oil forge. Could you use a turbocharger from a car to make a waste oil forge?

Hi, i just wanted some advice. I have 2 self designed and fabricated forging furnaces which go up to a max temp of about 1400'C. I use IS-8 Quality refractory bricks for lining the furnace walls and floor and have a mild steel door for the furnace. The door has ceramic fiber(coated with sodium silicate solution) lined in it to insulate and protect the 1 inch iron door. The Max capacity of the furnace is about 5 tons (depending on the size and shape of pieces being placed in it for heating). My problem is that the bricks of the floor and arc(mouth of the furnace) as well as the door of the furnace does not last too long. every 2-3 months, 4 maybe if im lucky, the furna…

I sold my induction heater today to someone who needed a heat source. We got it up and running. He heated a piece of steel and then smacked it with a mechanical air hammer. Here is the video of his first use.

hi im not sure if this has been covered before, and if it has, a grunt and point in the right direction is all i need! i served my apprenticeship using mostly induction heating, and furnace work, and i tried ( when the boss wasnt looking) many times, to weld bars heated to welding temp in the induction heater, with ne'er a weld. im assuming that the exposure to oxygen was the cause, so my question is this: has anyone tried running argon or other inert gas into an induction coil for welding purposes? i am guessing a more enclosed coil casing would be in order, but just an idea..... woody.

I think I am about ready to hand Grant a wad of dough for an induction forge and I am a little unsure about the size of machine to buy.... The one Grant is using is a 35 KW.... I know the two primary sizes he sells are 15KW and 25KW... I do big-ish stuff and think the 25KW is probably the smallest machine id by... I am just to afraid I would regret going with the 15KW.... But now I am worried maybe I should go with a larger machine yet... 30 kw or 35 kw.... I see machines on ebay that are 60KW that are not much more money than the small ones... Im going to buy one through Grant but I assume the same would hold true that the bigger ones are not way more expensive …

Hello all. I made an induction heater for a friend who is into forging swords. Originally, I built this just for fun. I modified some of the coils to allow him to heat a brick of iron up to the point of melting if he so chooses. I am including two videos showing it heating the brick and another heating a knife blank. I thought this would be a good place to share this technology. Please feel free to ask any questions. iron brick Longer video of heating brick and hammering Heating a blank Heating a blank and hammering

I have been struggling to get LPG for almost three weeks now. I have a total gaz, BP and afrox and have been unable to buy LPG because of the shortage so will be modding all my forges to use recycled oil and LPG. The mod is quite simple on the blown burner set up that I have and from all the research that I have so far done I understand that I will get a hotter flame because the BTU's from oil are higher than LPG. The idea is to do a short preheat with LPG and then run a gravity feed oil line into the burner. Once the forge is at red heat it is hot enough to vaporize the oil without the need to atomize the oil with compressed air. I worked out that at the moment at max…

I went to look at the Blacksmiths Depot website because I wanted to see the retail pricing on Grant's induction forges, but all the links are bad. Grant, perhaps you can let us know if you're still importing these, and where we can find them. I'm not in the buying cycle quite yet for a forge, but I am in the buying cycle for a house, and I wanted to see the electrical requirements and options. If I remember from other threads, you have a 15KW, 25KW and a 40 KW. Since I'm just a hobbyist, I'm mostly interested in the 15KW, because I can't really justify the cost of one of those, and if you start adding in complicated cooling systems, there's no way I'll be able to put …

Anyone using a surge protector for your induction forge? I'm worried about lightning taking out my much beloved but very expensive forge! -Tod

Hi guys. My business could definately benefit from having an induction forge. Waiting for my coal or even propane forges to come up to speed is something I could do without. Here's my situation; I have a medical device implanted in my abdomen that's basically a pain medicine pump. It pumps medication into my spinal column 24/7 in tiny amounts (broke my back in a skiing accident in 93). It's ok to use around microwaves like those found in the home kitchen, and can even handle most MRI machines. If the machine does affect the pump, it's only that it shuts off the little motor inside the infusion pump until the MRI is shut off, then it restarts. With this in mind, I'…

Does anyone know where I could find drawings of an electric slot furnace. forging steel billets 1" x 7" ?

In this video they use a machine that looks like a spot welder that has water cooled shoes and is used to heat rivets. I have done a bit of research and at least learned that this machine is not a spotwelder but specifically built for the task. Has anyone ever used or seen one of these? Could a spot welder be modified to do this? Locomotive riveting I know there are other ways, I am really just interested in information on this method

Look at this, a free heat source!~

Hello to all- I have a question about building an oil-fired forge. I have looked at the posts about this, and it looks like everyone is scratch building the burners. Will a comercially built oil burner from an oil furnace work? What I have is a Becket AF2 Burner. Modern design with a pressure switch, flame retention style head. I also have fire brick I saved from another job. the burner has it's own pump, so I don't need to worry about gravity feed- just need to wire up a 120v switch to turn it on and off. Any thoughts? I was going to use some scrap 304 SS to build the forge body out of, because it is an outside project right now. (No current shop)Let me know if this wil…

I recently acquired an old forge from a mine in northern idaho. The nameplate says Sullivan machinery co. Chicago. Class gf2, (I think, its kinda buggered up), Shop number 1226 It was diesel fired. Its pretty big, must weigh a couple hundred pounds. It has a pretty large opening, maybe 3 feet long by foot and a half tall when top is on it. The diesel was fed in along with compressed air. Its lined with a lot of firebrick. That's all I know about it, anyone seen or have one like this. I just want to know more about it. I might try to use propane in it and get it running again.

I am new here so please excuse any newbieness. I was wondering what your guys perspective is on waste oil vs propane forges. I was interested in terms of burner construction, fuel cost, heat capability (need to be able to weld), residues or contamination of metla and safety (shop is in the garage). Also do you know any good sites with info on waste oil burners? I have found a few for propane but not much on waste oil.

My new induction heater is great! Many thanks to Grant! The speed is something you have to experience to really get how this will change the way you work forever. At least that's how I feel after using it for three or four hours, :-) One problem I am having, is when I go to taper a bar, the tip becomes very difficult to heat... now this is partly a good thing (it is easy to burn a piece in half as I discovered) but kind of a pain...I find myself sticking the tip of the taper in the coil and waiting...waiting... it just doesn't get hot -- too far away from the coil I guess... mostly it gets hot by proximity. I have considered setting up my gas-saver and torch for jus…

They've got 6 induction coils that will heat 1.5" billet to 2200F - $3000 each http://cgi.ebay.com/6-Unused-used-billet-heating-induction-coils-Tucker-/120633756103?pt=LH_DefaultDomain_0&hash=item1c165509c7 - too rich for my wallet.

Hello. Just found this, this guy melts glass in a few seconds using a big lens, could do that to get specific heats on steel too. Sundrop Jewelry - Sterling Silver and Glass Solar Energy Jewelry Merry Being, Archie

These are some pictures of my waste oil burning forge burner. Along with a couple of pictures of the forge. The bent tube entering the rear of the 1 1/2" pipe tee, is the waste oil inlet. Propane preheat enter through the brass elbow on the side of the tee fitting. The blower will be hooked to the barbed 1 1/2" fitting. I'll get more pictures when I fire it up. Larry

Finally got the induction heater I've been wanting for over a year. Many thanks to Grant and John N. I also finally got to grips with Youtube. It's a 25KVA machine, a lot of the ones on youtube are 15KVA. The extra power means it can put a LOT of heat into a bar VERY quickly. The top figure on the display is the elapsed time. The lower is the current in the coil, this starts around 600A and then gets up to over 1000A.....thats a LOT of Amps....even more are flowing around as eddy currents in the bar .... so it gets hot .... very very quickly The bar is 40mm diameter. Note how the heater heats the outer layer of the bar and this heat is transferred by conduction i…

Greetings! Been a while since I have posted, but I'm back! I have been taking a serious interest in oil forges. I have all of the pieces for my burner, and testing will be underway soon. I chose the Moya oil burner design. However, I really like the propane forge design. It resembles a piece of pipe layed on its side, with the burner entering at an angle from the top. I was wondering if I could use that same sort of design for my oil forge. Heres my main question: Could I use a 1 foot section of 1/4 inch thick steel pipe for my oil forge? The diameter is about 7 inches or so. Most oil forges/foundries I have seen were made of refractory cement. I dont want to …