Lincoln Electric IM556 AC-235 - Manual (Page 18)

CAUTION: INSULATION IS REQUIRED
IN THESE TWO AREAS.
– 18 –
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
(235 amps).
2. Electrode: 1/8” (3.2mm) or
5/32" (4.0mm) 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" (7.9mm) or thicker), posi-
tion the plate to be pierced vertically, and the electrode hor-
izontally. This allows the molten metal to drip away freely
as you are boring through.
USING THE CARBON ARC TORCH
. . . Welding Aluminum and Copper Alloys
. . . Brazing and Soldering
. . . Heating, Bending and Straightening
Required Equipment
1. A Lincoln Carbon Arc Torch L-2645; Its rating is 100
amperes.
2. 1/4, 5/16 or 3/8” (6.4, 7.9, or 9.5mm) carbons: Use only
copper coated and cored carbons to avoid overheating
the holder and provide even burning of the carbons.
3. Any AC or DC welder: Carbons burn much faster on DC
than they do on AC. Also the carbon connected to the
positive DC output should be larger than the carbon con-
nected to the negative DC output so both carbons
burnoff at about the same rate.
Torch Connections
Insert the straight ferrule on the end of one arc torch lead
into the standard electrode holder. Attach the spring clip on
the end of the other lead to either the work clamp or the
welding table where the work lead is clamped. If connect-
ed to the table, insulate the work from the table. See draw-
ing below.
ELECTRIC SHOCK can kill.
When soaking electrode keep your gloves and
clothing dry. Never dip an electrode holder in
water..
WARNING
Jaw Assembly
T9984
(2 Required)
Complete Arc Torch
K1876-1
Thumb Screw
T9078
(Part of T9984)
Ground Clip
T10379-1
Use 235
amperes