284546 - Hobart HR100 Replacement MIG Gun, 10 ft, .030-.035 Wire Capacity

Technical Overview of the Hobart HR100 MIG Gun

The Hobart HR100 MIG Gun (SKU: 284546) is the designated OEM replacement assembly for specific Hobart wire feed welding systems. Engineered to meet the precise specifications of the Hobart Handler series, this gun assembly ensures seamless integration with the wire drive mechanisms of the Handler 190, Handler 210, and Multi-Handler 210 units. The assembly features a 10-foot (3-meter) cable lead, providing a standard operational radius that balances reach with consistent wire feedability, minimizing the friction coefficient often associated with longer liners in push-only systems.

Technically, the HR100 is an air-cooled torch rated for the amperage outputs typical of the compatible power sources. It comes factory-configured to accept solid steel wires ranging from .030 inches (0.8 mm) to .035 inches (0.9 mm) in diameter. The internal liner, contact tip, and gas diffuser are pre-installed, adhering to Hobart's manufacturing tolerances to ensure stable arc transfer and efficient shielding gas coverage. This unit serves as a direct supersession for several legacy part numbers, including the H100L4-10, H100S4-10, and H-14 MIG guns, consolidating inventory requirements and simplifying maintenance protocols for older equipment.

The construction of the HR100 utilizes high-impact polymers for the handle and trigger assembly, offering resistance to thermal stress and mechanical impact common in industrial environments. The backend connection is specific to the Hobart small-chassis feeder design, ensuring a secure electrical and gas connection without the need for adapters. Maintenance personnel should note that while the gun is supplied with consumables for .030-.035 wire, it is adaptable to other wire sizes supported by the power source, provided the correct liner and contact tips are installed.