Tweco 1040-1916 Mig Gun 400A 15 Ft Miller

Product Description

The TWECO 1040-1916 is a VELOCITY2 Classic No. 4 air-cooled MIG gun rated at 400 amps and 60% duty cycle, designed for demanding production and fabrication environments. It accepts wire diameters from 0.035 to 0.045 inches and comes with a 15-foot cable assembly terminated in a Miller-style rear connector. The gun uses the VELOCITY2 contact tip system, which eliminates threaded connections, requires no tools for tip changes, and features gas porting to keep tips cooler during extended runs. Licensed HVAC and welding professionals in heavy industrial settings rely on this gun for high-amperage, continuous-duty MIG and gas-shielded flux-core applications.

The 1040-1916 is suited for heavy-duty fabrication across shipyards, offshore facilities, steel mills, automotive manufacturing, and general industrial maintenance and repair operations. The solid copper conductor path with a centered liner and conduit liner fitting inside the tip ensures consistent wire feed and arc stability during high-deposition welding passes. The VELOCITY2 contact tip system delivers documented tip life improvements: 2 to 3 times longer life on short-arc solid wire, 4 to 5 times on spray transfer, and 8 to 10 times on gas-shielded flux-core wire compared to conventional threaded tips.

Key Features

• 400A rating at 60% duty cycle for sustained heavy-duty output
• VELOCITY2 tool-free contact tips are gas-ported, thread-free, and rotatable to extend service life
• Solid copper conductor path with fewer connections for optimized electrical contact and thermal efficiency
• Centered liner with conduit liner fitting inside the tip for reliable wire feedability and arc stability
• Miller-style rear connector for direct fit to compatible Miller wire feeders
• Air-cooled design suitable for shipyards, steel industry, automotive, and industrial fabrication

Compatibility

The TWECO 1040-1916 is configured with a Miller-style rear connector. The VELOCITY2 Classic No. 4 platform is also available with Tweco, Lincoln, and Euro-Kwik style rear connectors for use with compatible wire feeders in those product families.

Installation Notes

Installation and replacement of MIG guns should be performed by a qualified welding technician or maintenance professional. Power down and de-energize the wire feeder and welding power source before connecting or disconnecting the gun cable assembly. Verify that the rear connector style matches the feeder receptacle before installation, and inspect the liner and consumables before returning the gun to service. Follow the equipment manufacturer's guidelines and applicable workplace safety standards when servicing welding equipment.

Technical Specifications

• Amperage: 400A
• Duty Cycle: 60%
• Wire Diameter Range: 0.035 to 0.045 inches
• Cable Length: 15 feet
• Connector Style: Miller
• Cooling Method: Air-cooled
• Package Width: 3.4 inches
• Package Length: 23.3 inches
• Package Height: 14.3 inches
• Weight: 12.76 pounds
• Sold As: Each

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1040-1916