300753 - Miller XR-15A Pistol Plus Push-Pull Gun, 15ft, 200A

Technical Overview of the Miller XR-15A Pistol Plus

The Miller XR-15A Pistol Plus (SKU: 300753) is a specialized air-cooled push-pull MIG gun engineered specifically for use with the Miller 74 MPa Plus wire feeder. Designed to address the inherent challenges of feeding soft aluminum wires, this unit provides a robust solution for heavy industrial applications including shipbuilding, truck and trailer fabrication, and railcar manufacturing. The gun is rated for a welding output of 200 Amps at a 100% duty cycle, ensuring continuous operation without overheating in demanding production environments.

At the core of the XR-15A's performance is its durable motor and drive design, which significantly improves feedability and arc consistency. The system features dual wire tension settings specifically calibrated for 4000- or 5000-series aluminum alloys, allowing operators to fine-tune the feeding pressure to prevent wire deformation while ensuring positive traction. The gun supports aluminum wire diameters ranging from .030 to 1/16 inch (0.8 to 1.6 mm) and can also handle hard wire up to .045 inch (1.1 mm). The wire feed speed capability ranges from 70 to 875 inches per minute (IPM), accommodating a wide variety of welding parameters and deposition rates.

Maintenance and serviceability are key engineering focuses of the XR-15A. The gun features a replaceable feed cable liner, which allows for the replacement of just the liner rather than the entire feed cable assembly, reducing long-term parts costs. Access to the drive assembly is streamlined, and the head tube is removable without tools, facilitating quick changes and routine cleaning. The unit comes standard with a 15-foot (4.57 m) cable, providing ample reach for large weldments. The net weight of the gun is approximately 2.2 lbs (1 kg), minimizing the ergonomic load on the automation or manual operator.

This gun is designed to complete a push-pull system, meaning the motor in the gun works in synchronization with the motor in the 74 MPa Plus feeder. This synchronization is critical for aluminum welding, as it eliminates the friction and buckling issues common with standard push-only systems over longer distances. The XR-15A represents a high-performance solution for fabrication shops requiring consistent, high-quality aluminum welds.