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Miller MIG Machine Support

Multimatic 255

Industrial Auto-Line 208 - 575 V multiprocess Miller inverter with MIG, pulsed MIG, flux-cored, DC stick, DC Lift-Arc TIG, and pulsed TIG support. This page routes owners to the included MDX-250 heavy-duty gun, optional MDX-250 standard-duty gun, Spoolmate, Spoolmatic, XR push-pull aluminum guns, TIG controls, EZ-Latch running gear, and machine drive-roll paths from the February 2026 spec sheet.

MIG (GMAW)Pulsed MIG (GMAW-P)Flux-cored (FCAW)DC stick (SMAW)DC Lift-Arc TIG (GTAW)Pulsed TIG (GTAW-P) Industrial multiprocess
Multimatic 255

Processes

MIG (GMAW), Pulsed MIG (GMAW-P), Flux-cored (FCAW), DC stick (SMAW), DC Lift-Arc TIG (GTAW), Pulsed TIG (GTAW-P)

Welding range

MIG/flux-cored 20 - 350 A; stick 30 - 275 A; DC TIG 5 - 275 A

Input power

Auto-Line 208 - 575 V, single-phase, 50/60 Hz

Wire feed speed

50 - 800 ipm (1.3 - 20 m/min.)

Weight

Machine only: 84 lb. (38 kg); machine with running gear: 148 lb. (67 kg)

Class

Industrial multiprocess

Feature Highlights

Auto-Line Input

Accepts any single-phase input voltage from 208 - 575 V with no manual linking.

Pulsed MIG And Pulsed TIG

Pulse capability supports higher-quality welds, lower heat input, reduced spatter, and aluminum or stainless MIG applications.

Auto-Set

Predefined settings are available for MIG, pulsed MIG, stick, and DC TIG with fine tuning after setup.

Program Mode

Save up to four favorite programs for each process to improve repeatability and reduce setup time.

7-Inch LCD Interface

Large color display uses soft keys, setup images, larger text, and full troubleshooting descriptions.

Push-Pull Compatible

Supports XR-Aluma-Pro, XR-Aluma-Pro Lite, and XR-Pistol-Pro push-pull aluminum gun paths.

Auto-Gun Detect

Automatically adjusts voltage, wire speed, and timers when switching between MIG, push-pull, and spool guns.

Generator Compatible

Full output is available from generators with 12,000-watt output or higher.

Machine Packages

Stock numberCatalog package
907728 Multimatic 255, Auto-Line 208 - 575 V, 50/60 Hz
951767 Multimatic 255 with Running Gear; includes machine 907728 and single cylinder running gear 301449
951768 Multimatic 255 with Dual Cylinder/TIG Kit; includes machine 907728, dual cylinder running gear 951769, and TIG kit 301518

Compatible Accessories

EZ-Latch Single Cylinder Running Gear

301449 Running gear with single cylinder rack and storage compartment; latches secure the machine to the cart.

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EZ-Latch Dual Cylinder Running Gear

951769 Running gear with dual cylinder rack and elevated gun and cable rack for cable storage.

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

301481 Converts an EZ-Latch single cylinder running gear into a dual cylinder rack; included with the EZ-Latch dual cylinder running gear.

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Protective Cover

301521 Machine cover with side pocket.

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Argon/Mixed Gas Regulator and Gas Hose

195050 Regulator and gas hose accessory listed on the Multimatic 255 ordering table.

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Wireless Remote Foot Control

301580 Foot control with wireless 90 ft. (27.4 m) operating range; the spec sheet notes this machine is not compatible with wireless hand control.

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RFCS-14 HD Foot Control

301589 Heavy-duty foot control included with the TIG kit and dual cylinder/TIG package.

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RCC-14 Remote Contactor and Current Control

151086 East/west rotary fingertip control with 26.5 ft. cord and 14-pin plug.

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RCCS-14 Remote Contactor and Current Control

043688 North/south rotary fingertip control with 26.5 ft. cord and 14-pin plug.

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10-Pin to 14-Pin Adapter Cord

301545 Allows standard 14-pin TIG remote controls to be used with the Multimatic 255.

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Multimatic 255 V-Grooved Drive Roll Kits

204579 / 087131 / 079594 / 079595 / 079596 Solid-wire drive roll kits for .024, .030, .030/.035 reversible, .035, and .045 in. wire.

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Multimatic 255 V-Knurled Drive Roll Kits

079606 / 079607 / 079608 Flux-cored or difficult-to-feed wire drive roll kits for .035, .045, and .052 in. wire.

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Multimatic 255 U-Grooved Drive Roll Kits

044749 / 079599 Aluminum wire drive roll kits for .035 and .047 in. wire.

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Compatible Guns / Torches

MDX-250 MIG Gun with MDX Heavy Duty Consumables

1770043 15 ft. 250-amp MDX-250 gun for .035/.045 in. wire; this is the included Multimatic 255 gun path.

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MDX-250 MIG Gun with MDX Standard Duty Consumables

1770035 / 1770037 10 ft. and 15 ft. 250-amp MDX-250 gun options for .030/.035 in. wire.

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Spoolmatic 15A Spool Gun

195156 15 ft. air-cooled one-pound spool gun rated 200 A at 100 percent duty cycle for .030 - .047 in. aluminum wire.

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Spoolmatic 30A Spool Gun

130831 30 ft. air-cooled one-pound spool gun rated 200 A at 100 percent duty cycle for .030 - .047 in. aluminum wire.

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Spoolmate 200 Spool Gun

300497 20 ft. spool gun rated 160 A at 60 percent duty cycle for .030 - .035 in. aluminum wire and .023 - .035 in. steel/stainless wire.

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Optional Spoolmate 200 Head Tubes

300591 / 300592 / 243385 45-degree head tube, 9 in. extension head tube, and 5 in. head tube options for Spoolmate 200.

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XR-Aluma-Pro Push-Pull Gun

301568 / 301569 15 ft. and 25 ft. air-cooled gooseneck-style push-pull guns for .030 - .047 in. aluminum wire, rated 300 A at 100 percent duty cycle.

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XR-Aluma-Pro Lite Push-Pull Gun

300948 25 ft. air-cooled gooseneck-style push-pull gun for .030 - .047 in. aluminum wire, rated 175 A at 60 percent duty cycle.

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XR-Pistol-Pro Push-Pull Gun

300782 / 300783 15 ft. and 25 ft. air-cooled pistol-grip push-pull guns for .030 - .047 in. aluminum wire, rated 200 A at 100 percent duty cycle.

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U-Grooved Aluminum Drive Roll and Accessory Kits for XR-Aluma-Pro

195311 / 195313 Push-pull aluminum accessory kits for .035 and .047 in. wire with Multimatic U-grooved drive rolls, nylon wire guides, and contact tips.

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Multimatic 235/255 TIG Kit

301518 Includes 25 ft. Weldcraft A-150 TIG torch, RFCS-14 HD foot control, 10-pin to 14-pin adapter cord, regulator with 5 ft. gas hose, and AK3C torch accessory kit.

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Miller Catalog Accessories

These accessories are placed here only when the Miller catalog names this machine, torch, feeder, or family path. Verify plug style, voltage, package, and serial-specific details before ordering.

PartAccessoryCatalog fitmentSource / path
195379 Air-Cooled TIG Torch Connector 50 mm Dinse-style for Multimatic 235/255, Syncrowave 300/400, Maxstar 210/280/400, and Dynasty 210/300/400 A-200 / WP26 path. Catalog p. 128
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195378 Air-Cooled TIG Torch Connector 50 mm Dinse-style for Multimatic 235/255, CST, Syncrowave 300/400, Maxstar 210/280/400, and Dynasty 210/300/400. Catalog p. 128
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Full machine details

Welding Output

  • MIG/flux-cored: 230 A at 25.5 V, 60% duty cycle
  • Stick: 200 A at 28 V, 60% duty cycle
  • DC TIG: 275 A at 21 V, 60% duty cycle
  • Spec sheet notes superior stick arc performance even on difficult-to-run E6010 electrodes.

Wire Capacity

  • Included .035/.045 in. (0.9/1.2 mm) reversible drive rolls support the factory MDX-250 heavy-duty gun setup.
  • Included MDX-250 heavy-duty gun path supports .035/.045 in. wire.
  • Optional MDX-250 standard-duty gun path supports .030/.035 in. wire.
  • Spoolmatic, Spoolmate 200, XR-Aluma-Pro, XR-Aluma-Pro Lite, and XR-Pistol-Pro paths cover aluminum MIG options.
  • Machine drive-roll kit table covers solid, flux-cored, difficult-to-feed, and aluminum wire paths.

Material Capacity

  • Source sheet lists industrial use for contract welding services, plant maintenance shops, and general fabricators.
  • Pulsed MIG is highlighted for lower heat input, out-of-position control, reduced spatter, aluminum MIG, and stainless steel MIG applications.
  • Use process, wire, gun, and owner manual settings for material-thickness selection.

Included With This Machine

  • Power source with 10 ft. (3 m) industrial power cord
  • 15 ft. (4.6 m), 250-amp MDX-250 MIG gun with MDX heavy-duty consumables for .035/.045 in. wire
  • 10 ft. (3 m) cable with electrode holder and 50 mm Dinse-style connector
  • 10 ft. (3 m) work cable with clamp and 50 mm Dinse-style connector
  • Flow gauge regulator and gas hose for argon or Ar/CO2 mix
  • .035/.045 in. (0.9/1.2 mm) reversible drive rolls
  • Extra contact tips
  • Material thickness gauge
  • Package 951767 adds EZ-Latch single cylinder running gear and chain to secure gas cylinder.
  • Package 951768 adds EZ-Latch dual cylinder running gear with elevated gun and cable rack, two gas-cylinder chains, and Multimatic 235/255 TIG kit.

Dimensions

Machine only: H: 19.25 in. (489 mm), W: 13.75 in. (349 mm), D: 24.25 in. (616 mm). Machine with running gear: H: 32 in. (813 mm), W: 13.75 in. (349 mm), D: 45 in. (1,143 mm).

Source: Miller Electric Multimatic 255 Spec Sheet, Issued February 2026, index DC/12.9. Product relationships on this page are kept separate from Amazon monetization data. Amazon buy buttons appear only after the product match, manufacturer, package quantity, and compatibility are verified.

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