300591 - Miller 300591 Spoolmate 200 Replacement Gooseneck Barrel

Genuine Miller Replacement Barrel for Spoolmate 200

The Miller 300591 is a precision-engineered Curved Barrel Assembly designed specifically for the Spoolmate 200 Series spool guns. As a critical component of the MIG welding torch, the barrel assembly (often referred to as the gooseneck or neck) dictates the angle of approach and the stability of the contact tip and gas diffuser. This genuine OEM part features a standard 45-degree bend, which is the optimal angle for general fabrication, allowing operators to access fillet welds and complex joints with ergonomic ease. Manufactured by Miller Electric, this component ensures seamless compatibility with your existing Spoolmate 200 setup, eliminating the fitment issues often associated with aftermarket generic parts.

Constructed from high-grade materials, the 300591 barrel assembly is built to withstand the thermal cycling and mechanical stress inherent in industrial welding environments. The integrity of the barrel is paramount for consistent wire feeding, particularly when pushing soft aluminum wires which are prone to bird-nesting if the liner path is compromised. A damaged or bent barrel can lead to erratic arc characteristics, poor gas coverage, and increased downtime. By replacing a worn barrel with this authentic Miller component, you restore the electrical conductivity and gas flow dynamics intended by the manufacturer.

This assembly is supplied as a single unit and is designed for straightforward installation. It connects directly to the Spoolmate 200 body, providing a secure mechanical and electrical connection. Maintenance personnel and procurement specialists should note that this part number (300591) is the direct replacement specified in the Spoolmate 200 service manual. Ensuring you have a spare barrel assembly in your MRO inventory can significantly reduce production stoppages caused by accidental drops or impact damage to the torch front end.

Technical Specifications and Compatibility

The Miller 300591 is strictly compatible with the Spoolmate 200 model. It is not designed for the Spoolmate 100, 150, or 3035 series. The assembly includes the curved metal tube structure required to mount the gas nozzle and contact tip adapter. Its dimensions are optimized to maintain the correct stick-out and nozzle-to-work distance, which is crucial for maintaining shielding gas coverage and preventing porosity in the weld pool. With a shipping weight of approximately 1 lb and a length of 11 inches, it is a substantial and durable component ready for heavy-duty use.