Tweco 1040-1105 Mig Gun 400A 25 Ft Air-cooled

Product Description

The TWECO 1040-1105 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 comes with a 25-foot lead cable featuring a Tweco-style rear connection. The gun is built for semi-automatic welding in medium to heavy-duty fabrication environments. Key construction details include a three-layer conductor tube (copper tube, silicon-resin glass insulator, metal jacket), a 60-degree metal jacket conductor tube that swivels 360 degrees around the handle, and a silver-plated trigger with self-cleaning contacts. Licensed welding professionals and industrial fabricators are the primary installers of this equipment.

This MIG gun is suited for a wide range of applications including production fabrication, maintenance and repair, shop work, and general industrial welding. The oval-shaped, high-impact crush-resistant handle is balanced to pivot at the center, reducing operator fatigue during extended use. The fully insulated Mig-Kwik connection allows fast attachment and detachment at the wire feeder, making it practical in production settings where downtime must be minimized. A gun hanger at the bottom of the handle provides a convenient resting point between passes.

Key Features

• 400 A rating at 60% duty cycle with CO2 gas for medium to heavy-duty output
• Accepts 0.035 to 0.045 inch wire diameter range
• Three-layer conductor tube construction: copper tube, silicon-resin glass insulator, and metal jacket for durability
• 60-degree metal jacket conductor tube with full 360-degree swivel around handle
• Silver-plated trigger contacts with self-cleaning action on each engagement and disengagement
• Steel spring strain relief supports the Cablehoz at the rear of the handle to reduce wire feed issues
• Split-half handle case allows field repair of the Cablehoz without additional connectors
• Mig-Kwik fully insulated connection for quick feeder hookup and disconnect

Compatibility

Front-end consumables are interchangeable with the Tweco Spray Master series and Tweco Professional No. series, allowing lower inventory requirements across compatible gun lines.

Installation Notes

Installation and service of MIG welding equipment should be performed by qualified welding professionals familiar with applicable AWS and OSHA safety standards. Always disconnect power and depressurize the shielding gas supply before servicing the gun, cable, or feeder connection. Verify that the wire feeder output connection matches the Tweco-style rear connector before installation. Note that an adapter plug is required for some feeder configurations; confirm feeder compatibility before putting the gun into service.

Technical Specifications

• Amperage: 400 A
• Duty Cycle: 60% with CO2 gas
• Wire Size Range: 0.035 to 0.045 inches
• Lead Cable Length: 25 feet
• Conductor Tube Angle: 60 degrees
• Conductor Tube Swivel: 360 degrees
• Cooling Method: Air-cooled
• Package Weight: 16.95 pounds
• Package Length: 23.1 inches
• Package Width: 14.3 inches
• Package Height: 3.4 inches

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1040-1105