Tweco
Tweco WM400M-15-3545 Air-Cooled MIG Welding Gun 15 ft 400 A 60%
Air-cooled MIG welding gun rated 400 A at 60 % duty cycle with a 15 ft cable and Miller-compatible rear connection
- TypeAir Cooled
- Air-cooled design keeps the gun lightweight and easy to manoeuvre
- 400 A capacity at 60 % duty cycle handles heavy fabrication tasks
- 15 ft cable gives generous reach around large workpieces
- Miller-compatible rear connection fits existing wire feeders without adapters
- Fixed 60° neck angle provides consistent access for MIG welding positions
WeldSkill WM 400 Air-Cooled MIG Gun
The Tweco WeldSkill WM 400 is an air-cooled MIG welding gun rated for 400 amperes at a 60 percent duty cycle using CO2 shielding gas. It accepts solid or aluminum wire up to .045 inch diameter and uses WS14 series contact tips. The 15 foot cable terminates in a Miller-compatible rear connection for direct machine fitment.
Fixed 60-Degree Neck and Curved Handle
The gun features a fixed neck tube set at a 60 degree angle paired with a curved handle and standard trigger. This geometry suits operators who prefer a set wrist position for repetitive passes. The fixed neck cannot be rotated or swapped, so joint access is limited to the single installed angle.
400 A at 60 Percent Duty Cycle on CO2
At the rated 400 amperes the gun reaches its thermal limit after six minutes of continuous welding in a ten minute period. Higher amperage or longer arcs will overheat the air-cooled cable assembly faster. The .045 inch maximum wire diameter caps deposition rate for heavy-build applications.
Highlights
- Air-cooled design keeps the gun lightweight and easy to manoeuvre
- 400 A capacity at 60 % duty cycle handles heavy fabrication tasks
- 15 ft cable gives generous reach around large workpieces
- Miller-compatible rear connection fits existing wire feeders without adapters
- Fixed 60° neck angle provides consistent access for MIG welding positions
Specifications
| Brand | Tweco |
|---|---|
| Model | 358-1047-1027 |
| Type | Air Cooled |
Questions about this item
What wire diameter should I select for this gun?
The gun accepts solid or aluminum wire up to .045 in diameter, and the tip series is WS14.
How long can I weld continuously at the rated 400 A?
At 60 % duty cycle you can weld for six minutes out of every ten before the gun must cool.
Will the rear connection fit my Miller machine?
Yes, the rear connection is Miller-compatible for direct fit.
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