Tweco 1040-1914 Mig Gun 400A 10 Ft Miller

Product Description

The TWECO 1040-1914 is a VELOCITY2 Classic No. 4 air-cooled MIG gun rated at 400 amps with a 60% duty cycle, built for heavy-duty welding applications. It accepts wire diameters from 0.035 to 0.045 inches and comes with a 10-foot cable. The gun features a solid copper conductor path with large copper-to-copper surface contact, delivering optimized thermal and electrical efficiency. The Velocity2 contact tip system is gas-ported to run cooler, eliminates threads, requires no tools for changes, and can be rotated to extend tip life. Licensed welding professionals and fabrication shops rely on this gun for consistent, stable arc performance across a range of wire types and transfer modes.

The 1040-1914 is configured with a Miller-style rear connector, making it a direct-fit replacement for Miller MIG welding setups. Typical applications include shipbuilding and offshore yards, structural steel fabrication, industrial and general fabrication, automotive manufacturing, and repair and maintenance environments. This gun is designed for heavy-duty production use where duty cycle, wire feed reliability, and consumable longevity are critical.

Key Features

• 400A rating at 60% duty cycle — suited for heavy industrial and production welding
• Gas-ported Velocity2 contact tips run cooler and last significantly longer than standard tips
• Tool-free tip replacement with rotatable tips to extend service intervals
• Solid copper conductor path with fewer connections for maximum electrical surface contact
• Centered liner with conduit liner fitting inside the tip for superior wire feedability
• Proven tip life improvements: 2-3x with short arc solid wire, 4-5x with spray transfer, 8-10x with gas-shielded flux core
• Miller-style rear connector for direct compatibility with Miller welding systems

Compatibility

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. Accepts 0.035 to 0.045 inch wire diameter.

Installation Notes

Installation and connection of MIG guns should be performed by a qualified welding technician or electrician familiar with the welding system in use. Power down and disconnect the welding power source before connecting or removing the gun. Verify the rear connector style matches the power source before installation. Follow all applicable OSHA and AWS safety standards for welding equipment setup and use.

Technical Specifications

• Amperage: 400A
• Duty Cycle: 60%
• Wire Diameter Range: 0.035 to 0.045 inches
• Cable Length: 10 feet
• Cooling Type: Air-cooled
• Rear Connector Style: Miller
• Package Weight: 9.6 pounds
• Package Length: 23.3 inches
• Package Width: 14.3 inches
• Package Height: 3.4 inches
• UPC: 608246440224

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1040-1914