Tweco 1040-1058 Mig Gun 450 a 25 Ft

Product Description

The TWECO 1040-1058 is a 450-amp, air-cooled MIG welding gun from the Spray Master series, built for demanding spray transfer and pulse welding applications. It ships with a 25-foot power cable featuring a Tweco-style rear connection and a simplified direct rear plug for fast setup. The gun handles wire diameters from 0.045 inches to 1/16 inch and is rated at 80% duty cycle using argon/CO2 or mixed shielding gases. A thick-walled, three-layer conductor tube improves electrical conductivity and acts as a heat sink, keeping operating temperatures in check during extended runs.

This gun is suited for production welding, maintenance and repair, farm and shop environments, and light fabrication work including artistic metalworking and garage use. The extended trigger keeps the operator's hand farther from the arc, reducing radiated heat exposure during long sessions. Front and rear spring strain relief protect the cable and minimize wire feed problems. The split-half handle case allows field repair without returning the gun for service, making it practical for job sites and production floors where downtime is costly.

Key Features

• 450-amp output rated at 80% duty cycle with argon/CO2 and mixed gases
• Handles wire sizes 0.045 inches to 1/16 inch for spray transfer and pulse welding
• Thick-walled, three-layer conductor tube acts as heat sink and improves electrical conductivity
• Heavy-duty contact tip and diffuser extend consumable life and reduce tip-change downtime
• Ergonomic handle balanced at center pivot reduces operator fatigue across welding positions
• Split-half handle case enables field repair; front-end consumables are interchangeable with Tweco Classic No. Series

Compatibility

Designed for use with Tweco-style MIG welding systems. Front-end consumables are interchangeable with the Tweco Classic No. Series, simplifying parts inventory across multiple gun configurations.

Installation Notes

Installation and setup should be performed by a qualified welding technician or electrician familiar with MIG welding equipment. Disconnect and de-energize the wire feeder and welding power source before connecting or servicing the gun. Verify the rear plug connection is fully seated before initiating a weld. Inspect the cable, strain relief, and consumables according to the manufacturer's maintenance schedule to maintain safe operation.

Technical Specifications

• Amperage: 450 A
• Duty Cycle: 80% with argon/CO2 mixed gases
• Wire Size Range: 0.045 inches to 1/16 inch
• Cable Length: 25 ft
• Cooling Method: Air-cooled
• Package Length: 23.25 inches
• Package Width: 14.25 inches
• Package Height: 3.34 inches
• Weight: 16.65 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1040-1058