Lincoln Electric IM348 AC-225-GLM - Manual (Page 16)

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After welding Cast Iron, protect the casting against fast
cooling. Put it in a sand (or lime) box.
If sand or lime is not available, cover it with sheet metal or
any other non-flammable material that will exclude drafts
and retain heat.
Cast Iron Plate Preparation
Wherever practical, the joint to be welded should be “veed”
out by grinding or filing to give complete penetration. This
is especially important on thick castings where maximum
strength is required. In some instances a back-up strip may
be used and plates may be gapped 1/8" or more.
On sections where only a sealed joint is required and
strength is not important, the joint may be welded after
slightly veeing out the seam as shown.
Cutting Do not exceed the Duty Cycle — See
page 9)
The arc welder and the electrode can be used for cutting
steel and cast iron. Follow this procedure:
1. Use 1/8 or 5/32" Fleetweld 180 electrode.
2. Set welder on maximum (225 amps).
3. Hold long arc on edge of metal, melting it.
4. Push the arc through the molten metal, forcing it to fall
away.
5. Raise the electrode, and start over again.
The important thing is to continue this up-and-down, saw-
ing motion, melting the metal and pushing it away.
If a lot of cutting is to be done,
soak each electrode in water for
a minute or two. It keeps them
cooler, and the electrodes last
longer.
Piercing Holes
1. Welder setting: Maximum
(225 amps).
2. Electrode: 1/8 or 5/32"
Fleetweld 180.
3. Hold the electrode with a
long arc perpendicular
over the spot where the
hole is to be made.
4. When the metal is molten,
push the electrode through
the molten puddle.
5. Give the molten metal a chance to fall through the hole.
6. Circle with a long arc around the edge of the hole until
the desired diameter hole has been made.
If the electrode is pushed through too soon it will stick in
the puddle. Be sure the metal is molten before pushing
through .
NOTE: On heavy metal 5/16" or thicker), position the plate
to be pierced vertically, and the electrode horizontally. This
allows the molten metal to drip away freely as you are bor-
ing through.
ELECTRIC SHOCK can kill.
When soaking electrode keep your gloves and
clothing dry. Never dip an electrode holder in
water..
WARNING