Lincoln PRO MIG 140 Welder Review

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In Brief: Review of Lincoln Pro MIG 140 Welder

The Pro MIG 140 is a dual-process welding machine designed to weld materials like aluminum and steel. The welder is compatible with both gasless and gas versions of flux core welding or MIG welding. The product can be used in a range of applications from workshops or projects to light industrial fabrication and it can be run from a 120 Volt household input.

The Pro MIG 140 Welder runs on domestic power input of 120V and can weld materials like steel and aluminum.

The welder while used for automobile repair or domestic/hobby projects, the Pro MIG 140 can also be used for lighter industrial applications and fabrication.

The machine runs on an AC or a DC power source and arrives with a number of accessories that can be used for types of welding. The welder features a tension indicator that alerts the user in case of machine overload.

The machine is also a spool gun ready for welding aluminum materials.

The welder was manufactured by Lincoln Electric, a company based in Ohio and founded in 1895. Lincoln Electric is one of the oldest manufacturers of welding accessories and equipment in the country.

The following video gives a brief overview of the welder:


The following section will expand upon the specifications of the machine.

Key Specifications of Lincoln Pro MIG 140 Welder

The Pro MIG 140 weighs in at 50 pounds and can be operated through either an AC or a DC input.

The machine is capable of welding metals such as steel or aluminum and can handle thicknesses ranging from 24 Gauge up to 5/16 inches.

The welder has a 20% duty cycle at 90 Amperes. The product also delivers an output range of 30 to 140 Amperes, while also being compatible with welding wire thicknesses from 0.025 to 0.035 inches.

How to use the Lincoln Pro MIG 140 Welder

The Pro MIG 140 has a large output range and can be used right out of the box, with the use of the accessories in the package. An adjustable drive facilitates a clean wire alignment in the welder.

The drive also works to ascertain that crushing and tangling of the wire is reduced.

The machine is designed to minimize drive roll changeovers. The welder is equipped with a brass-to-brass gun connection which increases the conductivity of the welder.

In case of a machine overload, the tension indicator raises an alarm to alert the user of potential damage to the welder or the user.

The machine package includes numerous accessories that help to get the welding process started right from the box. The machine also has a rigid handle on top of the welder which makes it easier to carry and transport.

Through the use of a two knob control, the welder can be set up for gasless flux-cored welding for deeper penetration on thicker steel or gas-shielded MIG welding on thin gauge steel, stainless or aluminum.

Warranty / Repairs

Lincoln Electric ensures a standard 3-year warranty on the product and a 3-month warranty on the gun and cable assembly. The product also comes with a 30-day return policy.

The company determines the nature of the defect and decides the validity of the claim. The customer can also request for repair in case of any damage.

Lincoln Electric can be enquired through the number 1-888-935-3877 or their website in the support section the link here>.

Customer Review Analysis

A variety of reviews were read and analyzed from sites such as Amazon, Home Depot and Northern Tool, and a consensual opinion towards the welder was generated.

A number of buyers mentioned the accessibility and efficiency of the welder, along with being a fairly powerful welder for its size and cost.

The welder’s comprehensive controls result in a better quality of welds since it can be operated effectively by a novice user as well.

The machine’s versatility was also a huge asset as it was able to perform all the claimed welding operations with ease, thus reducing a need for secondary welders.

Many users confirmed that the welder can be used in household/domestic applications as well as small industrial operations.

Pros / Cons of the Lincoln Pro MIG 140 Welder


  • Ease of usage
  • Compatible with the standard household input
  • Dual-process
  • Mobile and lightweight
  • Higher duty cycle
  • Shielding gas option
  • Rugged
  • Quieter operation
  • Smooth working wire feed


  • Struggles to weld thicker materials
  • Non-stackable


Recommended Accessories with Lincoln Pro MIG 140 Welder

The following accessories are included with the machine in order to make the machine usable from the get-go –

  • Contact tips
  • MIG gun
  • Clamp and ground cable
  • Spindle adapter
  • Gasless Nozzle
  • Gas Nozzle
  • Gas Regulator
  • Welding wires

Additional accessories that can be used with this product include –

Utility Cart

Lincoln Electric, K520, Utility Cart

Spool gun

Lincoln Electric, K2532-1, Magnum 100SG Spool Gun

Gas Regulator

Harris Products Group HP701 Series Specialty Gas Regulator, 0 to 50 psi, 2.125", Med Gas Mix - KH1123


Can this machine be used for gas welding?

Yes, the machine is capable of gas welding.

Can this machine run in the 120V residential plug?

Yes, the machine can be used through a 120V plug.

What is the warranty we get with this product?

The product has a standard 3 warranty.

Is it capable of weld stainless steel and aluminum?

Yes, it is capable of welding both the materials, but you will need a spool gun for welding aluminum.

Does this welder require a shielding gas?

This machine has the option of using gas or gasless flux core arc welding.

What gas can I use with this welder?

The machine can use Carbon Dioxide for steel and Argon for Aluminum.

Our Recommendation

The Lincoln Pro MIG 140 is a great light or medium-duty welder. Due to the Pro MIG 140’s numerous features and an accessible interface, the welder holds good value for its price.

Subsequently, the machine is rugged and provides good arc quality for welds. The welder has a high output range for its class which translates to the welding of thicker materials with ease.

The welder also supports gas-less arc welding adding to its versatility. The machine can also be used with a spool gun and a number of other reliable attachments which adds to the materials that can be operated on with the use of the welder.

Being powerful, the welder is also surprisingly compact and portable, which makes it easy to store as well as transport.

We would recommend the Pro MIG 140 welder for domestic, light industrial or shop work.

About Stephen Ward

Stephen believes that "The devil is in the detail". He takes pride in his exhaustive research and fact-based writing. He has written on a variety of topics, including power tools and home appliances.

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