379-6705 - Tweco Style 400A MIG Gun 15ft .045 Wire Ready

Reliable 400A MIG Welding Gun for Industrial Use

The KK R4015-45 is a heavy-duty 400 Amp MIG gun designed to meet the rigorous demands of industrial fabrication and manufacturing. Engineered for reliability and ease of use, this air-cooled torch is an excellent choice for welders requiring a durable tool that can handle high-amperage applications without overheating. With a 15-foot cable length, it provides the necessary reach to work around large assemblies and fixtures, ensuring you aren't tethered too closely to your wire feeder.

This specific model comes pre-configured for running .045-inch welding wire, a standard size for structural steel and heavy plate welding. It features a standard Tweco-style backend connection (often referred to as a Tweco #4 plug), making it compatible with a vast array of wire feeders and power sources commonly found in Canadian workshops. If your machine uses a different connection, adapters are widely available, but for native Tweco-style feeders, this is a plug-and-play solution.

One of the key benefits of the KK R4015-45 is its use of standard Tweco-style consumables. You won't need to hunt for proprietary tips or nozzles; it utilizes the ubiquitous 14-series contact tips, 24-series gas nozzles, and 54-series gas diffusers. This ensures that keeping your gun serviced and operational is both convenient and cost-effective. Whether you are welding in a production line or a repair shop, this gun delivers consistent arc performance and wire feeding.

Key Features for Josef Gas Customers:

• High Capacity: Rated for 400 Amps, suitable for spray transfer and flux-cored applications.


• Standard Parts: Uses common consumables available at Josef Gas.


• Durability: Rugged handle and strain relief systems designed to withstand shop abuse.