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 CO2 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, CO2 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% CO2 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)].

WARNING

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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Comparison of the GMAW (MIG) and FCAW (Innershield) Processes

		.035" (0.9 mm) Dia. NR-211-MP
Electrode Wire	.025" (0.6 mm) Dia. L-56 (GMAW)	Innershield (FCAW)

Shielding Gas	CO2 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-CO2gas.(1)
Penetration into	Good	Excellent
Base Metal
Smoke Level	Low	High
Amount of Slag	Low, little or no cleaning required	Slag must be removed

OPTIONAL ACCESSORIES

1.K463 CO2 Gas Regulator and Hose Kit —

Includes a preset, nonadjustable pressure and

flow regulator for use on CO2 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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