Specifications
2
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MIG GUNS
MIG Gun Selection Guide
Solid Wire – Mild Steel and Stainless Steel
Wire
Diameter
Amperage Range
Recommended Alternate
30 100 150 200 250 300 350 400 450 500 550 600 650
.023" -
.030"
(0.6 - 0.8
mm)
CO
2
Tweco Fusion
™
140
Tweco Classic No.1
75-
25
.035"
(0.9 mm)
CO
2
Tweco Fusion 180,
220, 250 & Tweco
Classic No. 2
Spray Master
®
250
75-
25
.045"
(1.2 mm)
CO
2
Spray Master 350
& Tweco Classic
No. 4
PulseMaster
™
Air-Cooled 350, Supra
®
XT
450, TUFF-N-LITE 350, Smoke Master 450
Higher Argon
Mixture
.052"
(1.3 mm)
Higher Argon
Mixture
Spray Master 450
& Tweco Classic
No. 5
PulseMaster Air-Cooled 450, Supra XT
450, Smoke Master
®
450, Supra Water-
Cooled 450
1/16"
(1.6 mm)
Higher Argon
Mixture
Spray Master 450
& Tweco Classic
No. 6
PulseMaster Air-Cooled 450, PulseMaster
500, Supra Water-Cooled 450,
Standard Water-Cooled 600
Solid Wire – Aluminum
Wire
Diameter
Amperage Range
Recommended Alternate
30 100 150 200 250 300 350 400 450 500 550 600 650
.030"
(0.8 mm)
Argon
Spool Gun 160 &
200, Tweco
Fusion 140
Tweco Classic No.1
.035"
(0.9 mm)
Argon
Spool Gun 300
PulseMaster Air-Cooled 350,
Tweco Classic No.2,
3/64"
(1.2 mm)
Argon
PulseMaster
Air-Cooled 350 &
Tweco Fusion 250
PullMaster
™
300, Classic No.3,
TUFF-N-LITE 350
1/16"
(1.6 mm)
Argon
PulseMaster
Air-Cooled 450 &
Spray Master 350
PullMaster 300, Classic No.4,
TUFF-N-LITE 350
3/32"
(2.4 mm)
Argon
PulseMaster
Air-Cooled 450 &
Spray Master 450
PullMaster 300, PulseMaster Water-Cooled
500, Tweco Classic No.4,
Supra Water-Cooled 450
When welding with aluminum wire, standard MIG gun length of 12 ft should not be exceeded and conduit liners/contact tips made specifically for
aluminum wires should be used.
Flux Cored Wire
Wire
Diameter
Amperage Range
Recommended Alternate
30 100 150 200 250 300 350 400 450 500 550 600 650
030"
(0.8 mm)
Self-shielded
Tweco Fusion 140 Tweco Classic No. 1
.035"
(0.9 mm)
Self-shielded
Tweco Fusion 180,
220, 250
Tweco Classic No. 2
CO
2
or 75-25
.045"
(1.2 mm)
Self-shielded
Tweco Fusion 220,
250, Spray Master
350
Tweco Classic No. 2, Supra XT 450
CO
2
or 75-25
.052"
(1.3 mm)
CO
2
or 75-25
Spray Master 450,
Tweco Classic No. 4
Supra XT 450
1/16" -
5/64"
(1.6 - 2.0
mm)
Self-shielded
Spray Master 450,
Tweco Classic No. 5
Supra XT 450
CO
2
or 75-25
3/32"
(2.4 mm)
Self-shielded
Tweco Classic No.6 Tweco Classic No. 5
CO
2
or 75-25
*Flux Cored SEFC Series MIG Guns are to be used only with Self-Shielded wire
MIG Guns
SELECTION GUIDE