using OxyAcetylene for forge

J

john mw

Joined
Jan 25, 2009
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2
I'm getting ready to make my first forge (a small one to heat-treat smallish knives). I've got a piece of 6in dia black pipe, some soft firebricks and some insulating wool. I've been reading that most people use propane or MAPP, for heat. My question is - is there any reason not to use my OA torch with a rosebud on it? Is it too hot?
thanks
 
While it is possible to do what you said, it is not really an optimal idea. The flame is too concentrated (even with a rosebud) and there will likely be too much oxygen in the flame. A JTH-7 running on MAPP will be much better, and can be used to do other jobs.

I always suggest that you stop and think before building a tiny forge. For about $30 more you can build a 6-8" X 10-12" forge with a venturi burner, or for about $60-80 more a 8X16" blown forge. If you could get a KMG for only a few bucks more than a Coote, wouldn't you?

Stacy
 
I've only managed to crack a few sections now running on propane with a Bernzomatic torch whereas before i'd rather practically everywhere using MAPP Gas ! :D 1095...quite a leap from A2 ! Which doesn't seem to have a problem being heated by either gas (eventhough that's not the correct way to do it !)
 
Yes, welcome to the forums. I didn't see the #1. Filling out your profile is a good idea. It makes answers better and may let someone know you are a close neighbor.
Stacy
 
Welcome, I actually was about to post much the same question. Thanks for putting it up now I have some answers a perhaps a different route to go. Let us know how it goes.
 
Some of the blacksmiths in the local association use oxy-acetylene or oxy-propane for forging, especially on small pieces where localized heats are useful. They build a stand to hold the torch with foot operated pedal and gas saver system...step on the pedal, torch comes on, release pedal, torch goes out. After I saw this, I almost regretted not going this route instead of a forge as it's more efficient, cooler and seemed like it would be great for doing knives. A forge is likely better for heat treating though.
 
Thanks for the advice, everyone. I'm going to go out and get a Benzomatic burner to start with, and maybe later make my own. This is a great forum, and I appreciate the welcomes.
 
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