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DESCRIPTION:

These are pictures of a gas fired forge furnace.

Posted by Pete Keillor <keillorp135@chartermi.net>.  

The following description was provided:

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Here are some pictures of the forge I built for my 
son, Matt.  I owe a debt to Ron Reil for the design, 
as you can see.  Thanks, Ron.

I tried some things on the burner.  I used the Tweco 
tips, but didn't like the gas flow path sideways in a 
1/8" nipple, so turned some adapters for a co-axial 
approach.  I used a hole saw and shaper to make three 
oblong holes in each 1-1/2" nipple for air inlets, and 
turned the i.d. of the nipple to accept a bushing turned 
from 1117 (most anything would do).  I was hoping this 
would guarantee a centered gas jet.  Of course, they're 
only approximately centered because the threaded ends of 
the 1-1/2" to 3/4" reducers aren't very concentric. Still, 
they seem to work pretty good.  The chokes are just hand 
cut sheet metal with an overlapping section, and doubled 
ends at right angles for a 1/4" carriage bolt.


I used setscrews to allow adjustment and secure the assembly.  
The gas tube depth in the reducer isn't very sensitive.  It 
seems to draw equally well (according to the sound) as long 
as the Tweco tip is below the air inlets in the 1-1/2" nipple 
by about an inch, and not actually in the 3/4" nipple.

Anyway, the thing makes steel orange, so I guess it's working.  
I'm sure there'll be tuning down the road.

Pete Keillor