Millermatic® 125 Hobby MIG Welder - MillerWelds

Millermatic® 125 Hobby MIG Welder

Welds 24 ga to 3/16 in mild steel. Uses 115V power.


What's Included

  • Millermatic 125 Hobby
  • Power cord with plug
  • 8-ft. (2.4 m) M-80 MIG gun and cable assembly
  • 8-ft. (2.4 m) work cable with clamp
  • Argon and AR/CO2 mix flow gauge regulator with gas hose
  • Hobart® spool of .030-in. (0.8 mm) solid wire
  • Quick Select drive rolls for .024-in (0.6 mm) or .030/.035-in. (0.8/0.9 mm) solid wire, and .030/.035-in. (0.8/0.9 mm) flux-cored wire
  • Two contact tips for .030-in. (0.8 mm) wire
  • Material thickness gauge (#229 895)
A breakthrough control that automatically sets your welder to the proper parameters. In the Millermatic 125 Hobby it's available for .030 solid wire with 75/25 shielding gas. Simply set the wire diameter, set the material thickness, and start welding!
115V Input Power
Uses 115V household input power so there are no special power requirements.
Manual Mode
Gives you the flexibility to manually set the machine when welding stainless steel or anytime you want to set your own parameters on mild steel.
All Aluminum Drive System
Robust wire drive with Quick Select™ drive roll and calibrated tension knob creates consistent feeding and easy setup.
Quick Select™ Drive Roll
Makes setup quicker by offering three grooves - two for different size solid wire and a third for flux-cored wire.
Thermal Overload
Shuts down the unit and activates the over-temperature light if the airflow is blocked or duty cycle is exceeded.

Not Included

  • Shielding gas for welding with solid wire (GMAW)
  • Personal safety products (helmet, gloves)
  • Small running gear/cylinder rack



Flux Cored (FCAW)

General Specifications

Title Millermatic® 125 Hobby MIG Welder
Industries Interests DIY / Home Hobbyist
Metal Art / Sculptures
Farm and Ranch
Weldable Metals Steel
Stainless Steel
Input Voltage 110/115/120 V
Input Phase 1-Phase
Input Hz 60 Hz
Current Type DC
Rated Output 85 Amps at 18.25 VDC, 20% duty cycle
Max Open Circuit Voltage 31 VDC
Amperage Range 30 A - 130 A
Wire Feed Speed 0 IPM - 415 IPM
0 m/min - 11 m/min
Wire Diameter Solid Steel 0.024 in 0.03 in
Solid Steel 0.6 mm 0.8 mm
Stainless 0.024 in 0.024 in
Stainless 0.6 mm 0.6 mm
Flux Cored 0.03 in 0.035 in
Flux Cored 0.8 mm 0.9 mm
Net Width 9.875 in
Net Height 16.875 in
Net Length 12.125 in
Net Weight 49.7 lbs
Warranty Miller's True Blue Warranty
Portability Handle(s)
Running Gear / Cart (Optional)
Weld Output CV



Reviews & Ratings

Rated 4 out of 5 by from Great product! This welder rocks! Highly recommend it for your next project. The progression of Miller products has looked good the last few years!
Date published: 2017-08-23
Rated 5 out of 5 by from Better than advertised I confess I won this welder as a prize in a contest not run by Miller. Miller and Hobart are now under the same company. The case on the welder and its dimensions are identical to the Hobart Handler 125EZ (flux core only) welder I bought as a factory refurbished unit seven years ago. So far, I can tell the gun, driver roller assembly, and ground clamp are diffeent. The 125 Hobby also has independent wire speed adjustment. The 125EZ is auto set only. I normally weld steel 1/8" in thickness or less, but there is an occasional weld on thicker material. The first photo shows a test weld I did on a piece 5/16" to a piece 5/32" in thickness. I welded a bead on both sides with no chamfering to make a "V" for a root pass. When I cut across the joint at a right angle and polished the cut with a file, I could see no signs of a poor or incomplete weld. Although not recommended for materials thicker than 1/8" with solid wire and gas shielding, I will weld thicker materials with it now and then, although I will likely prepare the joint with a "V," a good root pass, and some preheating to further extend the capabilities of the welder. The Jerusalem cross of cut nails in the other photo is more typical of what I normally do. The nails are held together with small tack welds from behind. I have a couple of jigs I made to hold the nails in place. On this cross I used the recommended voltage setting of for 1/8" and recommended wire speed setting of 45. The settings were almost a little too hot, which was a nice surprise. Flux core welding makes it hard for me to see where I am welding. I found it very easy to make a very good looking bead as seen in the first photo. Part of that is just a difference between MIG with gas shielding and flux core welding. Flux core makes a lot of smoke that hinders the view of the weld puddle and MIG can be pushed so the arc lights the joint ahead of the arc. I am very impressed with this machine. It feels like quality. Setup and use of it are both easy, although I did momentarily panic when I thought I was missing a gas fitting for the back of the welder. At first I did not realize a red plastic thread protector needed to be pulled from the inside of the brass fitting on the welder.
Date published: 2016-10-04
Rated 5 out of 5 by from I like it. I got this welder from my family for Christmas. I am new to welding and am currently taking my second welding class at a local community college. So far I've really enjoyed using this welder. I built a welding cart for it, which I'll include a picture of. At my class, there are some more heavy duty Miller welders. Eventually I'd like to purchase one in order to have more versatility. But even when I do, I think I'll still keep this welder because it is convenient and easy to use. So far I've only used fluxcore wire on it. I'm excited to get a tank for it and see the difference with gas.
Date published: 2016-04-09
Rated 1 out of 5 by from Cheap! No decent regulator, cheap welder!!! Getting worse then there semi pro line Hobert!' This not good
Date published: 2016-02-21
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