Miller MIG Machine Support

Millermatic 251

Discontinued industrial MIG and flux-cored machine with M-25 gun support, Spoolmatic aluminum options, push-pull upgrade path, and Millermatic 252/255 replacement routing.

MIG (GMAW)Flux-cored (FCAW) Industrial Discontinued

Discontinued Legacy Machine

Use this page for the discontinued Millermatic 251. The Millermatic 252 is the direct replacement path for the traditional industrial 250-amp Millermatic platform, while the Millermatic 255 is the newer industrial platform option with updated controls, pulsed MIG support, and MDX-250 gun package details.

View the replacement Millermatic 252 page View the newer Millermatic 255 page

Processes

MIG (GMAW), Flux-cored (FCAW)

Welding range

30 - 300 A

Input power

200(208)/230 V or 230/460/575 V, 60 Hz configurations

Wire feed speed

25 - 700 ipm (0.64 - 17.8 m/min.)

Weight

215 lb. (98 kg)

Class

Industrial

Machine Packages

Stock number	Catalog package
903868	200(208)/230 V, 60 Hz
903869	230/460/575 V, 60 Hz
951007	200(208)/230 V, 60 Hz package with Spoolmatic 30A, dual cylinder rack, regulator, and hose
951009	230/460/575 V, 60 Hz package with Spoolmatic 30A, dual cylinder rack, regulator, and hose

Compatible Accessories

Dual Cylinder Rack

042758 Converts the single cylinder rack to a dual rack.

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Millermatic PSA Adapter

195019 Adapts Miller 24 VAC wire feeders to the Millermatic 251; the sheet says to call factory for specific applications.

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Protective Cover with Helmet Bag

195142 Protective cover with helmet bag listed on the Millermatic 251 sheet.

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CO2 Regulator/Flow Gauge

212492 Required if using 100 percent CO2 gas.

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V-Grooved Drive Roll Kit

204579 .030/.035 in. reversible drive roll kit listed on the January 2003 sheet.

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V-Knurled Drive Roll Kits

079606 / 079607 .035 in. and .045 in. flux-cored drive roll kits listed on the January 2003 sheet.

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Compatible Guns / Torches

M-25 Replacement Gun

169596 12 ft. M-25 gun listed as the standard replacement/included gun path for .030 - .035 in. wire.

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M-25 Replacement Gun

169594 10 ft. M-25 replacement gun listed on the January 2003 ordering table.

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Spoolmatic 15A Spool Gun

195156 Spool gun option for aluminum welding listed on the Millermatic 251 sheet.

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Spoolmatic 30A Spool Gun

130831 Spool gun option for aluminum welding listed on the Millermatic 251 sheet.

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Millermatic 251 Push-Pull Module

195161 Optional push-pull module for XR-A Edge or XR-A Pistol guns; not valid with products other than the Millermatic 251.

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Push-Pull Field Upgrade Kit

195203 Required for Millermatic 251 units prior to serial number LC325197.

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XR-A Edge Gun

181534 / 181535 Push-pull aluminum gun option listed in 15 ft. and 30 ft. cable lengths.

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XR-A Pistol Gun

198127 / 198128 Push-pull aluminum gun option listed in 15 ft. and 30 ft. cable lengths.

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Gun Convenience Kit

193975 M-25 kit with .035 and .045 contact tips, tip adapters, nozzle adapter, o-rings, shock washers, and 5/8 in. nozzle.

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Replacement Gun Path

OEM sheet path

M-25 Replacement Gun

169596 Primary gun path from the January 2003 DC/12.49 sheet: 12 ft. M-25 gun for .030 - .035 in. wire. Match M-25 consumables to the installed gun before ordering.

Open M-25 parts

Replacement machine family

MDX-250 Current Millermatic 252 Path

The replacement Millermatic 252 uses the MDX-250 gun family. Verify connector, gun package, and service guidance before treating MDX-250 as a direct replacement for an installed M-25 gun.

Open MDX-250 parts

Newer industrial platform

MDX-250 Current Millermatic 255 Path

The newer Millermatic 255 also uses the MDX-250 gun path on the current machine page. Confirm the machine generation and installed gun before ordering consumables or a full gun.

Open MDX-250 parts

Aftermarket Replacement Guns & Torches

Looking for an aftermarket replacement gun or torch for this machine? Compare compatible replacement options by brand, connector type, amperage, cable length, and verification status.

View Aftermarket Replacement MIG Guns

Full machine details

Welding Output

200 A at 28 VDC, 60% duty cycle
250 A at 28 VDC, 40% duty cycle

Wire Capacity

Solid steel: .023 - .045 in. (0.6 - 1.2 mm)
Stainless steel: .023 - .035 in. (0.6 - 0.9 mm)
Flux-cored: .030 - .045 in. (0.8 - 1.2 mm)

Material Capacity

Mild steel: 22 ga. to 1/2 in. in a single pass
Aluminum: use optional Spoolmatic 15A/30A spool gun or push-pull module with XR-A gun

Included With This Machine

Power cord and plug on 200/230 V model
12 ft. (3.7 m), 250-amp M-25 MIG gun for .030/.035 in. wire
Work cable and clamp
Argon mix regulator/flow gauge and hose
Extra contact tips
Factory-installed running gear/cylinder rack
.030/.035 in. reversible drive rolls
Setup and operation video

Dimensions

H: 32 in. (813 mm), W: 19 in. (483 mm), D: 39 in. (991 mm)

Source: Miller Electric Millermatic 251 Spec Sheet, Issued January 2003, index DC/12.49. 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.