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Miller® Millermatic® 255 MIG Welder, 208-240 Volt, 300 Amp, Single Phase Welding Machine With Auto-Line™ Power Management Technology, EZ-Latch™ Dual Cylinder Running Gear And Accessory Package

Airgas Part #:MIL951821

Manufacturer Part #:951821

$8,495.00 /Each
Package Size Options
$8,495.00 Each

Item Details

  • Miller® Millermatic® 255 is designed around people, Miller® equipment is easy to use and saves time. The Millermatic 255 Auto package is built exclusively to handle OEM repair procedures. This single-phase weld package produces quality repairs on all of today's multi-material vehicles which require various welds such as steel, silicon bronze and aluminum. Comes complete with all items to weld any job in the shop.


  • Easy-to-understand interface with 7-inch color LCD display ensures proper machine setup and parameter selection, reducing setup time and increasing weld time
  • Auto-Set™ Elite offers predefined weld settings to increase ease of use and ensure that the job is done right for operators of all skill levels
  • Program mode allows easy save and recall of favorite weld settings
  • Weld capability (short circuit, pulsed) and parameters capable of handling mixed materials (steel, silicon bronze, aluminum) to meet the repair needs in today's vehicles
  • For versatility and reliability Auto-Line™ allows for any single-phase input voltage hookup (208-240 V) with no manual linking, providing convenience in any job setting
  • Ideal solution for dirty or unreliable power
  • Pulsed MIG welding delivers higher quality welds for ALL welders


  • Input Power Auto-Line™ 208-240 V, single-phase
  • Rated Output 230 A at 25.5 V, 60% duty cycle
  • Amperage Range 20-350 A


  • Power source with 10 ft. (3 m) industrial power cord
  • 10 ft. (3 m) work cable with clamp and 50 mm Dinse-style connector
  • 15 ft. (4.5 m) 250-amp MDX™-250 MIG gun for steel wire
  • 10 ft. (3 m) 100-amp MDX™-100 MIG gun for silicon bronze wire
  • 12 ft. (3.7 m) 200-amp Bernard® BTB™ Gun 200 A for aluminum wire
  • Flow gauge regulators and gas hoses for argon and argon/CO2 mix
  • .024 in. (0.6 mm) V-groove drive rolls for steel wire
  • .030/.035 in. (0.8/0.9 mm) reversible V-groove
  • Drive rolls for steel and silicon bronze wire
  • .035/.047 in. (0.9/1.2 mm) reversible U-groove drive rolls for aluminum wire
  • MDX gun consumables for .024 in. (0.6 mm) wire MDX gun consumables for .030 in. (0.8 mm) wire
  • MDX gun consumables for .035 in. (0.9 mm) wire BTB gun Centerfire™ consumables for .047 in. (1.2 mm) wire
  • 8 in./10 lb. spool of .030 in. steel wire
  • 8 in./5 lb. spool of .035 in. silicon bronze wire
  • 8 in./5 lb. spool of .047 in. 5554 aluminum wire
  • Material thickness gauge
  • EZ-Latch™ dual cylinder running gear cart withelevated gun and cable rack
  • Chains to secure gas cylinder
  • Protective cover
  • Millermatic setup guide


  • Auto Repair
  • Heavy Truck / Trailer Repair

Product Attributes

Trade Name

» Millermatic® 255

Input AC Voltage

» 208 V
» 220 V
» 230 V
» 240 V

Feeder Information

» Included

Output DC Amps (Max)

» 300


» Flux Cored (FCAW)
» Pulsed MIG (GMAW-P)

Duty Cycle

» 230 Amp At 25.5 Volt At 60% Duty Cycle


» Single Phase


» 148 lb