Miller Millermatic 255 MIG/Pulse MIG Welder w/Dual Cylinder Running Gear 951821

In stock
SKU: 951821
Regular price $8,495.00 USD


  • Power source with 10 ft. (3 m) industrial power cord 

  • 15 ft. (4.5 m) 250-amp MDX™-250 MIG gun w/Bernard® AccuLock™ MDX consumables for .030/.035 in. (0.8/0.9 mm) steel wire 

  • Bernard® Q200 12 ft (3.7m) MIG gun with extra Centerfire™ contact tips for aluminum wire 

  • 10 ft MDX™-100 MIG Welding Gun w/Bernard® AccuLock™ MDX consumables for .035 in. (.9 mm) Silicon Bronze wire 

  • 10 ft. (3 m) work cable w/clamp & 50 mm Dinse-style connector 

  • 2 Flow gauge regulator and gas hose for argon or AR/CO2 mix 

  • .030/.035 in. (0.8/0.9 mm) reversible drive rolls 

  • .035/.047 in. (0.9-1.2mm) reversible U-Grooved drive rolls 

  • Extra contact tips 

  • Material Thickness Gauge 

  • 8 in 10 lb .030 Steel wire spool 

  • 8 in, 5 lb .047 5554 Aluminum wire spool 

  • 8 in 10 lb .035 Silicon Bronze wire spool 

  • Two chains to secure gas cylinders 

  • Protective Cover 

  • Quick Reference Setup Guide 


MDX-250 MIG Gun w/ AccuLock™ MDX consumables 

AccuLock liner loads from the front and locks at the front and back to insure proper alignment for flawless wire feed path. New rubber overmold and ball -and-socket handle design improves grip and reduces welder fatigue. New Industrial Bernard AccuLock™ MDX contact tips p[rovide superior MIG and Pulsed MIG arc performance. 


Capable of MIG, Pulsed MIG welding for any steel, Silicon Bronze or Aluminum application 


Easy-to-understand interface 

7-inch color LCD display ensures proper machine setup and parameter selection, reducing setup time and increasing weld time 

Auto-Line™ Technology 

This inverter power supply 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 

Lower heat input for less distortion on thin materials, less spatter minimizes post weld grinding and rework allowing more welding time. Perform welding applications that couldn’t be done in the past 


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 

Deliver more productivity, consistent quality by welders of all skill levels by using prequalified weld settings. Minimize supervisor need to intervene. 

EZ-Latch™ Dual Cylinder Rack with Elevated Gun and Cable Rack 

Dual cylinder rack and storage compartment. Allows operator to easily store two gas cylinders. Includes elevated gun and cable rack to keep cables off the floor and tangle free. 


Generator Compatible 

The Millermatic 255 will be able to operate and provide full output when powered by generators with 12000 Watt (12K) output or higher. Limited output will occur when used with smaller generators. 


Aluminum Welding 

Flux Cored (FCAW) 





Millermatic® 255 MIG/Pulse MIG Welder w/ Dual Cylinder EZ-Latch™ Running Gear- 208/240V 

Material Thickness 

Mild Steel 24 ga. (.51 mm) - 1/2 (13 mm) 
Aluminum 18 ga. (1.02 mm) - 1/2 (13 mm) 

Input Voltage 

208 V 
220/230/240 V 

Input Phase 


Input Hz 

50/60 Hz 

Current Type 


Rated Output 

230 A at 25.5 V, 60% duty cycle 

Amperage Range 

Amperage Min Max 20 A - 350 A 

Wire Feed Speed 

IPM Range 50 IPM - 800 IPM 

Wire Diameter 

Solid Steel 0.023 in - 0.045 in 
Stainless Steel 0.023 in 
Flux Cored 0.03 in - 0.045 in 
Aluminum 0.035 in - 0.047 in 

Spool Size 

12 in (305 mm)