Lincoln Electric MAGNUM LA-9 - Manual (Page 7)

CHART 1 — Select tungsten diameter and alumina nozzle based on current and application.
TYPICAL CURRENT RANGES FOR TUNGSTEN ELECTRODES (1)
AC
DCEN (-) DCEP (+)
Balanced Wave Unbalanced Wave
Tungsten Pure and Pure and 1%, 2% 1%, 2%
Electrode 1%. 2% 1%, 2% Thoriated Thoriated Alumina
Diameter Thoriated Thoriated Pure Tungsten Pure Tungsten Nozzle
in. (mm) Tungsten Tungsten Tungsten Zirconiated Tungsten Zirconiated Size
0.020 (0.5) 5- 20 (2) 10- 20 5- 20 5- 15 5- 20 4, 5, 6
0.040 (1.0) 15- 80 (2) 20- 30 20- 60 10- 60 15- 80 4, 5, 6
1/16 (1.6) 70- 150 10-20 30- 80 60- 120 50- 100 70- 150 5, 6
3/32 (2.4) 150- 250 15-30 60- 130 100- 180 100- 160 140- 235 6, 7, 8
1/8 (3.2) 250- 400 25-40 100- 180 160- 250 150- 210 225- 325 6, 7, 8
Tungsten Gas Lens
Electrode Collet Collet Body Collet Body
Diameter Part No. Part No. Part No.
in. (mm) (Industry Ref.) (Industry Ref.) (Industry Ref.)
0.020 (0.5) S19497-1 S19499-1 S19501-1
(13N20) (13N25) (45V41)
0.040 (1.0) S19497-2 S19499-2 S19501-2
(13N21) (13N26) (45V42)
1/16 (1.6) S19497-3 S19499-3 S19501-3
(13N22) (13N27) (45V43)
3/32 (2.4) S19497-4 S19499-4 S19501-4
(13N23) (13N28) (45V44)
1/8 (3.2) S19497-5 S19499-5 S19501-5
(13N24) (13N29) (45V45)
Nozzle
Orifice Size Standard Nozzle Gas Lens
Diameter (16th of Part No. Part No.
in. (mm) an inch) (Industry Ref.) (Industry Ref.)
1/4 (6) 4 S19368-1 S19370-1
(13N08) (53N58)
5/16 (8) 5 S19368-2 S19370-2
(13N09) (53N59)
3/8 (10) 6 S19368-3 S19370-3
(13N10) (53N60)
7/16 (11) 7 S19368-4 S19370-4
(13N11) (53N61)
1/2 (12.5) 8 S19368-5 —
(13N12)
5/8 (16) 10 S19368-6 —
(13N13)
(1) With argon gas.
(2) DCEP (+) is not commonly used in these sizes.
CHART 2 — Select Collet/Collet Body or Gas Lens Collet Body based on tungsten diameter and application.
CHART 3 (Alumina Gas Nozzle) — Select alumina gas nozzle orifice size based on application.
Standard gas nozzle, 1-5/32” (29.3mm) long, or gas lens, 1” (25.4mm) long.