Tweco 1040-1130 Mig Gun 400A 10 Ft Miller Connection

Product Description

The TWECO 1040-1130 is a Professional No. 4 Classic Series air-cooled MIG gun rated at 400 amps with a 10-foot lead cable and Miller-style rear connection. Designed for semi-automatic MIG welding, it accepts wire sizes from 0.035 to 0.045 inches and delivers a 60% duty cycle when used with CO2 shielding gas. The gun features a three-layer conductor tube construction consisting of a copper tube, silicon-resin glass insulator, and metal jacket for durability and consistent current delivery. A fully insulated Mig-Kwik connection allows fast hookup and disconnection at the wire feeder. The 60-degree metal jacket conductor tube swivels a full 360 degrees around the handle for maneuverability in tight or awkward welding positions.

This MIG gun is suited for medium to heavy-duty fabrication in industrial, shop, production, and maintenance and repair environments. The oval-shaped handle has been an industry standard for over 40 years and is built from a high-impact, crush-resistant plastic composition. A steel spring strain relief at the rear of the handle supports the Cablehoz and minimizes wire feed issues during extended use. The gun is balanced to pivot at the center of the handle, reducing operator fatigue across long shifts. A bottom-mounted gun hanger provides a safe resting point when the gun is not in use.

Key Features

• 400-amp output with 60% duty cycle rated using CO2 shielding gas
• Accepts 0.035 to 0.045 inch wire diameter range
• 10-foot lead cable with Miller-style rear connection and Mig-Kwik quick-disconnect at wire feeder
• 360-degree swivel on 60-degree metal jacket conductor tube for positional welding
• Three-layer conductor tube construction: copper tube, silicon-resin glass insulator, and metal jacket
• Silver-plated trigger contacts with self-cleaning action on each actuation
• Split-half handle case allows field repair without additional connectors
• Front-end consumables are interchangeable with Tweco Spray Master series

Compatibility

Designed for use with Miller-style wire feeders. Front-end consumables are interchangeable with Tweco Spray Master series and Tweco Professional No. Series guns.

Installation Notes

Installation and servicing of MIG welding equipment should be performed by a qualified welding technician familiar with the wire feeder and power source in use. Disconnect and de-energize the welding power source before connecting or disconnecting the gun cable at the wire feeder. Verify that the contact tip size matches the wire diameter being used before operation. Consult the wire feeder manufacturer's documentation to confirm rear-connection compatibility before final assembly.

Technical Specifications

• Amperage: 400 amps
• Duty Cycle: 60% with CO2 gas
• Wire Size Range: 0.035 to 0.045 inches
• Lead Length: 10 feet
• Rear Connection Style: Miller
• Conductor Tube Angle: 60 degrees
• Conductor Tube Swivel: 360 degrees
• Cooling Type: Air-cooled
• Weight: 9.5 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1040-1130