1770028 - Miller MDX-100 MIG Gun, 10ft, 100A, AccuLock System

Miller MDX-100 MIG Welding Gun: Precision and Reliability

The Miller MDX-100 MIG Welding Gun (Stock No. 1770028) represents a significant advancement in light-industrial welding torch design, engineered specifically to replace the legacy M-100 series. Rated at 100 Amps output, this air-cooled gun is optimized for use with .030 to .035-inch wire diameters and features a 10-foot cable assembly. It is the standard OEM replacement for Millermatic 141 and 211 power sources, as well as Multimatic 215 and 220 AC/DC multi-process machines.

AccuLock MDX Consumable System

At the core of the MDX-100's performance is the AccuLock MDX consumable system. Unlike traditional MIG guns where liners can float or become misaligned, the AccuLock system utilizes a front-loading liner that is locked concentrically at both the contact tip and the power pin. This dual-locking mechanism ensures a flawless wire path, significantly reducing friction and feeding issues such as birdnesting or erratic arc chatter. The contact tips feature tapered mating surfaces that lock securely into the gas diffuser, maximizing electrical conductivity and heat transfer, which extends the lifespan of the consumables.

Optimized Duty Cycle and Construction

The MDX-100 is built for consistent performance, boasting a 100% duty cycle when using CO2 shielding gas and a 60% duty cycle with mixed gases. The internal cable construction features increased copper content to ensure reliable current transfer for both CV (Constant Voltage) and pulse welding waveforms. Maintenance is streamlined through the error-proof liner trimming system, which eliminates the need for precise measuring—simply insert the liner, lock it, and trim flush, ensuring a perfect fit every time.

Technical Specifications

• Amperage: 100 A
• Cable Length: 10 ft (3 m)
• Wire Diameter Range: .030 - .035 in (0.8 - 0.9 mm)
• Cooling: Air Cooled
• Connection: Miller Style