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Old 12-10-2018, 04:57 AM
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JohnBoy JohnBoy is offline
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Default quickest dirtiest forge possible

I want to make a forge to do a very small job. never done any forging before, the job would probably be more properly done using an oxy torch, but I dont have one of those and dont want the spend.

I have a blowtorch like the pic, a shop vac, a bag of charcoal and some regular coal.

I want to roll a 1/2 inch hinge hole onto the end of 2x1/4 angle. (like the second pic, but angle. Obviously only one leg of the angle makes the hinge)

Not forge welding or anything, just need to make a piece of steel orange.

would the blowtorch and a few firebricks work? or would I be better getting a steel wheel and using the shop vac to make a blower and a real fire.
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Old 12-10-2018, 05:09 AM
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JohnBoy JohnBoy is offline
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I know I can dig a hole and do it in the ground, but I want something that I can have outside the door of the shop, not in the lawn!

This looks nifty, and I have a board of vermiculite

like 9 of these and the blowlamp would give me a box around 3x3x9 inches if I didnt use the vermiculite for €30

but would it get hot enough for 2 inch angle?

Last edited by JohnBoy; 12-10-2018 at 05:17 AM.
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Old 12-10-2018, 11:09 AM
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digger doug digger doug is offline
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Do you not have semi trucks with brake drums ?

Should be able to find one that's worn past spec. at a truck garage.
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Old 12-10-2018, 04:13 PM
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we do still have some drum braked trucks I'm sure. most modern kit is on discs I think, but there's loads of em in breakers yards.

Curious whether the blowlamp and firebricks thing would work, purely because it's a nice neat solution that doesnt weigh a load, and not really gonna be any more expensive than a brake drum and some plumbing fittings.

I think I'm going to go a different road with the job anyway so won't need to form my own hinges, but I like the idea of messing with fire at some stage in the future.
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Old 12-10-2018, 05:35 PM
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Dave Lee Dave Lee is offline
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I once, made a forge in a bucket, about 30 years ago. It was based on one in Popular Science magazine. It worked great!

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Old 12-10-2018, 08:07 PM
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The torch may do it. The problem you are going to have is the formng, it is a little more difficult than it appears to roll it around. Much easier to simply weld a tube to the end.

If you do decide to roll it, trim the bottom leg away, then tack the end of the piece to a round bar with several tacks. Start heating at the end and dont start bending until it is at least bright red. Then start working the heat back and follow the heat with the bend.
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Old 12-11-2018, 09:56 PM
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That torch should do what you are looking for. Probably not yet most efficient or quickest, but will do the job. Couple years ago, my son had expressed some interest in forging for some reason, so we went out and dig up some old firebricks my dad and had saved from a couple boiler removal jobs thirty years ago, and inside of an hour had a makeshift forge set up and was heating some steel for him to pound on, so it should be doable for you when you want to play some.

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Old 12-12-2018, 05:47 PM
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The easiest way to do it is to roll it smaller and then drift it to the proper size..

Tuck the very end in first ( start the rolling process at the very tip with over rolling it).. Ideally putting a longish taper so the hinge is wrapped vs butted..

Use a drift the same size as the pin or just a smidge larger.. When I need a drift for this kind of thing, I just use the stock I'm making the pin from and as soon as you forge the taper it will make it just a tad larger behind the taper..

I have a video online showing the process somewhere..

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Old 01-14-2020, 05:24 PM
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I finally hit a point where I've gotten up off my arse to make a gas forge.

I bought some fire bricks in the local hardware shop and after stacking them half a dozen different ways I've come up with a setup which should allow me to shrink it right down by popping in an extra brick inside.

I have some vermiculite board which I can line the sides and roof with too.

I have two torches to try out, the one further up the page and this beautiful roofing torch.

I'm not sure how to measure heat output but I'll fire them up and do some testing.

The bricks are wet from being stored outside so I set them up as a wind tunnel with a heater. The bricks sure do work anyway, the heat inside after only a few minutes was impressive.
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Old 01-14-2020, 06:36 PM
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I gave the body of my old forge to my brother in law and we mounted a harbor freight weed burning torch on it which is very similar to your roofing torch. It made enough heat, but I don't know how it held up over the long term.
I would take the torch off/away from the forge body when you shut it down so that it doesn't cook from the residual heat. The air and gas flow in the torch helps keep the important parts from burning up during use.
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