Tweco
Tweco M315-3545 MIG Welding Gun Air Cooled 300A 60% 15ft .045 Miller
Air-cooled MIG gun rated 300 A at 60 % duty cycle, 15 ft cable with Miller-compatible rear connection for .045 in wire
- MaterialHAWA
- TypeAir Cooled
- Air-cooled operation keeps the gun light and cool during long runs
- 300 A at 60 % duty cycle handles heavy MIG jobs without overheating
- 15 ft cable gives wide reach around the workpiece
- .045 in maximum wire size suits solid and aluminum wire
- Miller-compatible rear connection fits existing setups directly
Air-Cooled MIG Gun for Miller Systems
This Tweco Classic No. 3 MIG gun is an air-cooled welding torch rated at 300 amps with a 60 percent duty cycle. It accepts solid or aluminium wire up to .045 inch diameter and uses a 15-foot cable. The straight handle and standard trigger suit general MIG (GMAW) fabrication work.
Suited to Miller-Compatible Rear Connections
The gun fits machines with a Miller-compatible rear connection and a fixed 60-degree neck tube. Buyers whose equipment uses a different rear connection style or who require a rotatable neck should look at other models. It is not intended for water-cooled applications or for wire diameters larger than .045 inch.
Tip Series 14 Compatibility Decides Fit
Consumable selection is governed by the Tip Series 14 designation stamped on the gun. Match contact tips, diffusers and nozzles to that series to maintain proper electrical contact and gas coverage. Using a different tip series will prevent the gun from operating correctly.
Highlights
- Air-cooled operation keeps the gun light and cool during long runs
- 300 A at 60 % duty cycle handles heavy MIG jobs without overheating
- 15 ft cable gives wide reach around the workpiece
- .045 in maximum wire size suits solid and aluminum wire
- Miller-compatible rear connection fits existing setups directly
Specifications
| Brand | Tweco |
|---|---|
| Material | HAWA |
| Type | Air Cooled |
Questions about this item
What comes in the box and what extra parts do I need to start welding?
The gun ships with a fixed 60-degree neck, straight handle, standard trigger and a 15 ft cable ending in a Miller-compatible rear connection. You will need to add contact tips from the 14 series and a shielding-gas supply for CO2.
Which wire size and amperage rating should I match to this gun?
The gun is rated for a maximum wire diameter of .045 in and a maximum current of 300 A at a 60 percent duty cycle, so select .045 in solid or aluminum wire and a power source that can deliver up to 300 A.
What does the 300 A 60 percent duty cycle mean during a typical job?
You can weld continuously at 300 A for six minutes out of every ten; after that the air-cooled cable and handle need four minutes to cool before you resume at the same output.
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