Lincoln Electric IM348 AC-225-GLM - Manual (Page 14)

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1. Use 1/8 or 3/32" Fleetweld 180 electrode.
2. On thin metal, use 60-75 amps. (14 ga 75 amps — 16 ga
60 amps.)
3. Hold the electrode in a 30-45° angle with the tip of the
electrode pointing upwards.
4. Hold a VERY SHORT arc, but do not let the electrode
touch the metal.
5. An up and down whipping motion
will help prevent burn-through on
very thin plate.
6. Watch the molten metal carefully.
The important thing is to continue lowering the entire arm
as the weld is made so the angle of the electrode does not
change. Move the electrode so fast that the slag does not
catch up with the arc. Vertical-down welding gives thin,
shallow welds. It should not be used on heavy material
where large welds are required.
Overhead Welding
Various techniques are used for overhead welding.
However, in the interest of simplicity for the inexperienced
welder the following technique will probably take care of
most of his needs for overhead welding:
1. Use 1/8" (90-105 amps) or 3/32" (60 amps) Fleetweld
180 electrode.
2. Put the electrode in the holder so it sticks straight out.
3. Hold the electrode at an angle approximately 30° off
vertical, both seen from the side and seen from the end.
The most important thing is to hold a VERY SHORT arc.
(A long arc will result in falling molten metal; a short arc
will make the metal stay.)
If necessary — and that is dictated by the looks of the
molten puddle — a slight back and forth motion along
the seam with the electrode will help prevent “dripping.”
Welding Sheet Metal
Welding sheet metal presents an additional problem. The
thinness of the metal makes it very easy to burn through.
Follow these few simple rules:
1. Hold a very short arc. (This prevents burn through, since
beginners seem to hold too long an arc.)
2. Use 1/8 or 3/32" Fleetweld 180 electrode.
3. Use low amperage. 75 amps for 1/8" electrode, 40-60
amps for 3/32" electrode.
4. Move fast. Don’t keep the heat on any given point too
long. Keep going. Whip electrode.
5. Use lap welds whenever possible. This doubles the
thickness of the metal.
Hardfacing
There are several kinds of wear. The two most often
encountered are:
1. Metal to Ground Wear.
(Plowshares, bulldozer blades, buckets, cultivator
shares, and other metal parts moving in the soil.)
2. Metal to Metal Wear.
(Trunnions, shafts, rollers and idlers, crane and mine car
wheels, etc.)
Each of these types of wear demands a different kind of
hardsurfacing electrode.
When applying the proper electrode, the service life of the
part will in most cases be more than double. For instance,
hardsurfacing of plowshares results in 3-5 times more
acreage plowed.
How to Hardface the Sharp Edge (Metal to Ground
Wear)
1. Grind the share, approximately one inch wide along the
edge, so the metal is bright.
2. Place the share on an incline of approximately 20-30°.
The easiest way to do this is to put one end of the share
on a brick. (See drawing.)
Most users will want to hardface the underside of the
share, but some might find that the wear is on the top
side. The important thing is to hardface the side that
wears.
3. Use 1/8" Abrasoweld™ electrode at 90-105 amps. Strike
the arc about one inch from the sharp edge.
4. The bead should be put on with a weaving motion, and
it should be 1/2 to 3/4" wide. Do not let the arc blow
over the edge, as that will dull the edge. (See drawing.)