Lincoln Electric IM366 SP-100 - Manual (Page 7)

PRODUCT DESCRIPTION
The SP-100, Type K462, is a complete semiautomatic
constant voltage DC arc welding machine. Included is
a solid state controlled, single phase constant voltage
transformer/ rectifier power source and a wire feeder
for feeding .023 – .030" (0.6 – 0.8 mm) solid steel
electrode and .035" (0.9 mm) cored electrode.
The SP-100 is ideally suited for individuals having
access to 115 volt AC input power, and wanting the
ease of use, quality and dependability of both gas
metal arc welding or GMAW (also known as MIG
welding) and the Innershield
® electrode process (self-
shielded flux-cored or FCAW). A convenient chart is
mounted inside the wire feed section door for setting
welding procedures for 24 gauge through 12 gauge
(0.6 – 2.5 mm) mild steel (Chart also may be found in
this manual). The SP-100 is a rugged and reliable
machine that has been designed for dependable ser-
vice and long life.
RECOMMENDED PROCESSES AND
EQUIPMENT
The SP-100 can be used for welding mild steel using
the GMAW, single pass, process which requires a
supply of shielding gas or it can be used for the self-
shielded, Innershield electrode process.
The recommended gas and electrode for GMAW is
welding grade CO
2
gas and .025" (0.6 mm) diameter
Lincoln L-56 mild-steel welding wire [supplied on 12
1/2 lb (6 kg) spools]. For 14 gauge (2.0 mm) and thin-
ner, CO
2
gas is recommended because it gives equal
or better performance than a blended gas at a lower
cost. A mixed gas consisting of 75 to 80% Argon and
20 to 25% CO
2
is recommended for welding on heav-
ier gauge [12 gauge (2.5 mm) for example] steel.
The recommended electrode for the self-shielded
process is .035" (0.9 mm) diameter Lincoln
Innershield NR-211-MP on 10 lb (4.5 kg) spools. This
electrode can be used for all position welding of 20
gauge through 5/16" (1.0 – 8.0 mm) thick steel [multi-
ple passes are required for 1/4" and 5/16" (6.0 and 8.0
mm)].
Use of the GMAW process with the SP-100 on
thicker materials than recommended may result in
poor welds. The welds may “look” good, but may
just be “sitting” on top of the plate. This is called
“cold casting” and will result in weld failure.
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.035" (0.9 mm) Dia. NR-211-MP
Electrode Wire .025" (0.6 mm) Dia. L-56 (GMAW) Innershield (FCAW)
Shielding Gas CO
2
or blended None (Self Shielded)
Electrode Polarity Positive Negative
Minimum Gauge 24 ga (0.6 mm) 20 ga (1.0 mm)
NOTE: Requires more skill to use on 20 and
18 gauge (1.0 and 1.2 mm) than is
required with .025" (0.6 mm) L-56.
Maximum Gauge 14 gauge (2.0 mm) Can be used to weld 1/4" and 5/16" (6.3 mm
NOTE: Can be used for 12 gauge (2.5 mm) and 8.0 mm) thick steel with multiple passes.
with Argon-CO
2
gas. (1)
Penetration into Good Excellent
Base Metal
Smoke Level Low High
Amount of Slag Low, little or no cleaning required Slag must be removed
Comparison of the GMAW (MIG) and FCAW (Innershield) Processes
OPTIONAL ACCESSORIES
1. K463 CO2 Gas Regulator and Hose Kit —
Includes a preset, nonadjustable pressure and
flow regulator for use on CO
2
cylinders. Also
included is a 10 foot (3.0 m) gas hose which con-
nects to the rear of the SP-100.
2. K499 Ar-Mixed Gas Regulator and Hose Kit —
Includes a preset, nonadjustable pressure and
flow regulator for use on argon-mixed gas cylin-
ders. Also included is a 10 foot (3.0 m) gas hose
which connects to the rear of the SP-100.
3. .035 (0.9 mm) Innershield ® Welding Kit —
Includes a contact tip, a gasless nozzle and a
cable liner to permit the SP-100 gun and cable to
use a .035" (0.9 mm) diameter flux-cored elec-
trode. Also included is a spool of .035 (0.9 mm)
Innershield ® NR-211-MP.
Two kits are available:
K549-1 kit is for use with the Magnum™ 100L gun
(with red trigger).
K464 kit is for use with the original Lincoln
Electric® gun (with black trigger).
4. M15448-1 Reversible Drive Roll with double
knurled grooves for .035 cored electrode.
5. K467 Input Line Cord — Same as line cord sup-
plied with the SP-100 but has a NEMA type 5-20P
plug for use on 25 amp branch circuits.
To install optional features refer to instructions
included with the kit, and/or in this manual.
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