AMOUNT OF COILS
The amount to which the coils return should be the length needed as determined above. Starting 3 inch
from the edge of the routed firebrick, press the coil into place. Get some staples 2 inch long with a
radius of 1/16 inch and push these staples into the brick along the length of the Nichrome coil at points
to hold the coil in place in locating the staples. Be sure they are pressed between the individual coils so
as not to short out any adjacent coils. Once the Nichrome wire has been heated, it will take a
permanent set. The use of the staples is to aid assembly.
ASSEMBLING
Assemble the bottom, top and sides of the brick portion of the oven. Put one full brick on a solid flat
surface. Then, position the two side bricks containing the heating elements flush with the front and side
edges of the full brick and place the remaining full brick on the top of this assembly. Get some light,
4-inch pieces of stiff c inch diameter wire, and sharpened one end of each piece to a point. Drive two
of these wires, as you would a nail, through each full brick into each side brick, both top and bottom.
The wires should be located through the full brick so they will be driven into the middle of the side brick
one-inch from both the front and back edges of the assembly. You need the reinforcement of the bricks
to hold them together for the assembly into the metal case. Drill pilot holes a little under the diameter of
the wire used is drilled into the full brick. This will help in driving the wire into the side brick. When you
pre drill the holes, the wire is less apt to be driven into the sides at an angle. The firebrick is soft enough
to accept the wires without breaking, if drive them in carefully.
When ready slip the completed brick assembly into the formed metal case. Turn the case containing
the assembled bricks over so it rests on its top. Next, locate and drill two holes through the outside of
the metal case. This should be one inch from the front and back edges of the oven, and is centered with
relation to the flange of the bottom piece.