The initial design of this forge was inspired by my small one burner venturi forge being too small and thermally efficient for many of the projects I want to pursue. Some of the main design considerations were having two burners for a larger interior chamber size, a door on the side to allow larger pieces to be inserted (crucibles, armour work, etc.), and a much greater thermal efficiency. A good deal of the aesthetic design has changed due to tooling limitations, but the functionality remains essentially the same.
As life presents me with an ever changing outlook on the nature of possession, I have begun tending towards a state of mind where I want to be inspired by the objects around me, my tools, my workplace, where I live. And for it, I decided to start drawing a design that I would later hammer into the housing of the forge much like I did with this armguard.
This is the original design I started drawing that same night as the forge body, but it never really took me. So I started over, similar in concept but different enough that I was able to make something of it.
Over the course of the next several weeks, I started accumulating parts and materials for the construction, but then as fate would have it I fractured my finger right as the last pieces arrived. Unable to begin working on the forge, I had to content myself to the half truth that I would be better off waiting until I could hold tools again.
A good many weeks later, I am finally able to start the build. Below is a list of all the parts I have gathered and used, everything from the sheet metal to the rivets. More to come soon.
Parts List:
-Forge body-
.06" Sheet, 24"x36" -- for use as the shell
.06" Sheet, 12"x12", x2 -- for the two end faces
5/16" rod, 3' long -- to use as a handle/tool/firebrick shelf outside the working end
1/4" rod, 3' long -- to cut and make rivets out of, holding the body together
1/8"x1/2" rectangular bar, 6' long -- various structural reinforcements, around circumference of ends and on side door, and legs
1/8"x2" rectangular bar, 1' long -- brackets to reinforce where the burners meet the housing
Heat resistant black paint -- didn't get this one yet as the shipping would be at hazmat costs so I'm seeing if I can find it local. Used to paint the outside of the forge to give it a uniform, matte, rust resistant finish. After looking around I found this at the local hardware store marketed for stovepipes and grills.
3/4" Flange and accompanying bolts -- to connect burners to shell
Hinges -- For the door on the side. I was going to make these myself but decided not to...
3/16" rod, 3' long -- assorted rivets that the 1/4" was too large for
1"x3/32" rectangular bar -- to seal off the sides and bottom of the door to prevent flame seepage and cover the tool marks of cutting it out
-Burners-
3/4" Black steel pipe, 8" long, x2 -- shaft of the burner
3/4 to 1 1/4 bell reducer -- Flare at the top of the burner to hold nozzle and for air intake
1/4"x4 1/2" Brass pipe, x2 -- gas pipe line that will be drilled for the venturi nozzle
1/4" inner diameter brass pipe cap, x2 -- closes the non feed end of the nozzle pipe
1/4" inner diameter brass T fitting -- joins the two brass pipes and connects them to the gas line
#57 drill bit -- For drilling the pipes for the venturi nozzle (I ordered 2 in case one breaks)
1/4" Ball Valve -- (Female coupling on both sides) Last line of defence for the propane line, quick shut off if needed. Male coupling on both ends preferred, but none were available.
1/4" Pipe nipple, x2 -- For joining the valve to the burners and the hose to the valve
1/4" Propane hose -- To attach the burners to the propane tank. I was going to use the one from my old forge but decided to salvage only the regulator.
Propane regulator -- To join the hose with the propane tank and to regulate the propane PSI as it enters the burners. Using my old one, as I could not find any with a readout and throttle.
-Lining-
Kaowool, 1"x24"x5' -- synthetic wool lining, other brands are fine. I may have to order more of this, as it might not be enough to do 2"
Satanite Refractory Mortar, 3 Pounds -- seals the kaowool fibres and makes it a little more durable
ITC-100 Refractory Coating, 1/4 Pint -- IR coating, dramatically increases the efficiency of the forge. This will be placed over the satanite
Bubble Alumina Refractory Coating, 2.5 Pounds -- High flux resistance and rates over 3000 F, used for the floor lining (firebrick) and around the edges/burner inlet. This will be placed as an outer layer where applied
Firebrick, x3 -- 2 are for the floor of the forge, one in case one breaks/for a shelf outside the front
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