Lincoln Electric MAGNUM LA-9 User 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.