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Miller AccuLock MDX conical welding nozzle, brass, half-inch bore, threaded connection

Miller Enterprises

Miller Enterprises 1770028 AccuLock MDX Conical Nozzle 1/2 in 100-250 A

SKU CH-52KK-PV79E MPN 1770028

A conical brass MIG nozzle with a 1/2 in bore, threaded connection and flush tip seating rated for 100 A to 250 A

  • TypeWelding Parts & Supplies
  • Conical shape focuses shielding gas for cleaner MIG welds
  • 1/2 in bore fits MDX-100 series guns up to 250 A
  • Brass construction resists spatter buildup during extended runs
  • Self-insulated design simplifies setup with AccuLock MDX tips
  • Threaded connection ensures secure fit with D-M100 diffuser

Miller AccuLock MDX Conical Nozzle

The Miller 1770028 AccuLock MDX conical nozzle fits MDX-100 MIG guns and supports current ranges from 100 A to 250 A. It uses a threaded connection and a flush tip relationship for consistent gas coverage during MIG welding. The brass construction is self-insulated and rated for standard duty.

Pack of two nozzles

The supplier title indicates a pack of two NS-M1200B nozzles, giving the operator a spare for quick changeover. Having a second nozzle on hand reduces downtime when the bore wears or spatter builds up. No additional software or accessories are included in the package.

Bore diameter 1/2 in

The half-inch bore diameter determines the gas flow envelope and the maximum amperage the nozzle can handle. If the application requires a different bore size or a recessed tip relationship, this nozzle will not suit the gun setup. Buyers who need a larger bore or a different thread pattern must select another part.

Highlights

  • Conical shape focuses shielding gas for cleaner MIG welds
  • 1/2 in bore fits MDX-100 series guns up to 250 A
  • Brass construction resists spatter buildup during extended runs
  • Self-insulated design simplifies setup with AccuLock MDX tips
  • Threaded connection ensures secure fit with D-M100 diffuser

Specifications

BrandMILLER ELECTRIC
TypeWelding Parts & Supplies

Questions about this item

How often will the brass conical nozzle need replacement during 100-250 A MIG welding?

The standard-duty brass nozzle wears faster at higher amperages; expect more frequent swaps when running near 250 A versus lighter 100 A passes.

What limits continuous use at 250 A before the nozzle overheats?

The standard-duty rating and brass construction mean heat buildup becomes the limiting factor during sustained high-amperage MIG runs.

Does the self-insulated threaded nozzle run hotter or draw more power during all-day welding?

The self-insulated brass design dissipates heat through the nozzle body itself, so the tip area runs warmer during extended 100-250 A sessions.

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