PROJECTS: FLAME TUBE
makezine.com/26/flametube
MAKE IT.
BUILD YOUR
FLAME TUBE
Time: A Weekend
Complexity: Moderate
1. MARK AND DRILL FLAME HOLES
1a. Beginning 6" from the end
of the conduit, make a series
of marks with the marking
pen, ½" apart in a straight
line extending across the top
of the conduit. Stop marking
6" from the other end.
6"
15"
1a
48"
6"
5" holes,
spaced ½"
apart
2"
NPT hole
2"
NPT hole
15"
60"
1b. Drill 5" holes on the
marks, taking care to make
the holes as perpendicular
to the surface of the conduit
as possible (aim toward the
center of the conduit). This
will take a while, as there are
nearly 100 holes to drill. To
reduce drill wobble, move the
drill bit up into the chuck to
shorten the exposed length
of the bit.
1b
2. DRILL AND TAP STEEL CONDUIT
2a. Rotate the conduit 120°
and drill two 9" holes, 15"
from each end. Again, take
care to make the holes as
perpendicular to the surface
of the conduit as possible.
Tap the holes with the 2-18
NPT tap.
1b 2a
76 Make: makezine.com/26
TIP: To tap a hole in
metal, place a drop of oil
on the threads of the tap
and then insert the tap
into the hole.
