Tweco 1040-1101 Mig Gun 400A 10 Ft Air-cooled

Product Description

The TWECO 1040-1101 is a Professional No. 4 Classic Series air-cooled MIG gun rated at 400 amps with a 60% duty cycle using CO2 gas. It accepts wire sizes from 0.035 to 0.045 inches and ships with a 10-foot lead cable featuring a Tweco-style rear connection and a fully insulated Mig-Kwik connection for quick hookup and disconnection at the wire feeder. The gun is designed for semi-automatic MIG welding in medium- and heavy-duty fabrication environments. Licensed welders and professional fabricators install this gun in production shops, maintenance facilities, and industrial settings where reliable wire feedability and long service life are required.

The 1040-1101 suits a wide range of applications including production welding, maintenance and repair, farm and shop fabrication, and general industrial metalwork. The 10-foot cable provides enough reach for most bench and positional welding scenarios. The 60-degree metal jacket conductor tube swivels a full 360 degrees around the handle, making it well suited for tight-access and multi-position welds. Front-end consumables are interchangeable with other Tweco Professional No. Series and Spray Master Series guns, which simplifies consumable stocking across a mixed fleet of guns.

Key Features

• 400 A rating with 60% duty cycle at CO2 gas for sustained production use
• Accepts 0.035 to 0.045 inch wire for versatile filler metal selection
• 60-degree metal jacket conductor tube with full 360-degree swivel around handle
• Three-layer conductor tube construction (copper tube, silicon-resin glass insulator, metal jacket) for durability and consistent current path
• Silver-plated trigger contacts with self-cleaning action on every actuation
• Oval-shaped, high-impact crush-resistant handle balanced at center to reduce operator fatigue
• Steel spring strain relief supports the Cablehoz at the rear of the handle to minimize wire feed issues
• Split-half handle case allows field repair of the Cablehoz without additional connectors

Compatibility

Front-end consumables are interchangeable with the Tweco Spray Master series and Tweco Professional No. Series guns. The gun uses a Tweco-style rear connection compatible with standard Tweco-style wire feeders.

Installation Notes

Installation should be performed by a qualified welding technician or electrician familiar with semi-automatic MIG welding equipment. Power down and de-energize the wire feeder before connecting or disconnecting the gun. Verify that the feeder drive roll groove matches the selected wire diameter before operation. Follow the manufacturer's instructions and applicable electrical codes when routing and securing the lead cable to avoid sharp bends that can restrict wire feedability.

Technical Specifications

• Amperage: 400 A
• Duty Cycle: 60% at CO2 gas
• Wire Size Range: 0.035 to 0.045 inches
• Lead Length: 10 feet
• Cooling Method: Air-cooled
• Conductor Tube Angle: 60 degrees
• Connection Type: Tweco-style rear connection with Mig-Kwik feeder connection
• Package Weight: 9.91 pounds
• Package Length: 23.1 inches
• Package Width: 14.5 inches
• Package Height: 3.2 inches

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1040-1101