Tweco 1044-1135 Water-cooled Mig Gun 500A 12 Ft

Product Description

The TWECO 1044-1135 is a water-cooled MIG gun rated at 450 amps at 100% duty cycle with mixed gas and 500 amps at 100% duty cycle with CO2. Known as the Fusion Pro 7W, this gun is built for high-heat, continuous welding applications where gas-cooled guns fall short. Advanced cooling channels in the conductor tube accelerate heat dissipation, extending front-end wear part life up to five times longer than standard gas-cooled alternatives. The 12-foot cable length and Euro-Kwik connection make it compatible with most competitive wire feeders. Licensed welders and fabricators working in demanding production environments are the primary users.

This MIG gun is designed for heavy-duty fabrication across a wide range of industries. Typical applications include shipbuilding and offshore yard work, tank and pressure vessel fabrication, general manufacturing, automotive body fabrication, and aerospace assembly. The ergonomic handle reduces fatigue during extended weld cycles. Wire diameter compatibility ranges from 0.035 inches to 1/16 inch, supporting common solid and flux-core wire sizes used in high-amperage production welding. The thick conductor tube adds mechanical durability against accidental drops in busy shop environments.

Key Features

• Rated 450 A at 100% duty cycle with mixed gas, 500 A at 100% duty cycle with CO2
• Water-cooled conductor tube with advanced cooling channels for rapid heat dissipation
• Front-end wear part life up to 5x longer than gas-cooled MIG guns
• Euro-Kwik connection adapts with most competitive wire feeders
• Supports wire diameters from 0.035 inches to 1/16 inch, including soft wires
• Ergonomic, easy-grip handle reduces operator fatigue in high-heat production settings
• Thick conductor tube construction reduces damage risk from accidental drops

Compatibility

Designed for use with wire feeders equipped with a Euro-Kwik style connection. Compatible with wire diameters from 0.035 inches to 1/16 inch. Consult the Fusion Pro 7W accessory list for compatible contact tips, tip holders, gas nozzles, and insulating washers.

Installation Notes

Installation and service should be performed by a qualified welding technician or electrician familiar with high-amperage MIG welding systems. Before connecting or disconnecting the gun, power down the wire feeder and welding power source completely. Water cooling lines must be properly connected and leak-checked before resuming welding operations. Follow the equipment manufacturer's guidelines and applicable NFPA and NEC codes when routing water and power connections.

Technical Specifications

• Amperage (Mixed Gas, 100% Duty Cycle): 450 A
• Amperage (CO2, 100% Duty Cycle): 500 A
• Cable Length: 12 ft
• Wire Diameter Range: 0.035 inches to 1/16 inch
• Connection Type: Euro-Kwik
• Cooling Method: Water-cooled
• Weight: 8.75 pounds
• Package Length: 20.2 inches
• Package Width: 15 inches
• Package Height: 3.2 inches
• UPC: 662067228119

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1044-1135