Tweco
Tweco WM400-15-116 Welding Gun 400 A 15 ft .063 in
Air-cooled MIG gun delivers 400 A at 60 % duty cycle with a 15 ft cable for .063 in wire
- MaterialHAWA
- TypeAir Cooled
- 400 A output handles heavy fabrication jobs
- 60 % duty cycle sustains long welding runs
- 15 ft cable gives wide work-area reach
- .063 in wire capacity suits aluminum and solid wire
- Air-cooled design avoids separate water system
MIG gun for 400 A applications
This air-cooled MIG gun delivers up to 400 amps at a 60 percent duty cycle. It handles solid and aluminium wire up to .063 in diameter. The 15 ft cable suits standard workshop layouts. A curved handle and standard trigger give familiar control for GMAW and flux-cored processes.
Upgrade from lower-rated air-cooled guns
The 400 A rating replaces guns limited to lighter fabrication work. The jump is worth it when production shifts to thicker plate or longer welds that exceed the duty cycle of smaller torches. Fixed 60-degree neck geometry maintains consistent access without adjustable-joint complexity.
Build integration for Tweco rear-connection systems
The gun connects directly to Tweco-style rear fittings and uses WS14 series contact tips. Air cooling eliminates water-cooler plumbing, freeing bench space and reducing maintenance. CO2 shielding compatibility covers common shop gas supplies. Not suited for operations requiring water-cooled torches or higher amperage continuous output.
Highlights
- 400 A output handles heavy fabrication jobs
- 60 % duty cycle sustains long welding runs
- 15 ft cable gives wide work-area reach
- .063 in wire capacity suits aluminum and solid wire
- Air-cooled design avoids separate water system
Specifications
| Brand | Tweco |
|---|---|
| Material | HAWA |
| Type | Air Cooled |
Questions about this item
What rear connection does the WM400-15-116 need to mount on my feeder?
It uses a Tweco rear connection so the gun plugs directly into feeders with the matching Tweco block.
How do I install the 15 ft gun and what step is often missed?
Insert the liner for .063 in wire, secure the Tweco rear block, then set the drive rolls to 1/16 in — many forget to match the roll groove to the wire size.
Which consumables will I replace on the WM400-15-116 over time?
The WS14 contact tips, the fixed 60-degree neck tube and the liner for .063 in wire are the parts that wear out during MIG and flux-cored welding.
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