How To Choose An Arc Welder

6th August 2024

At Engweld we are well versed in the art of Arc welding; a technique that is used for making durable connections between metal parts. By making use of a power supply to create an electric arc to create an intense and localised heat which then melts, joins and fuses metals together. This intense temperature the arc creates allows, for example, for the edges of the weld to be melted and fused with filler metal, in the form of either a rod or a wire depending on the method used, although not all work requires a filler metal to be added.

There are three main types of arc welding technologies:

Before we get our teeth into what each of these welding technologies and techniques are, there are a few key points we will look at first.

How to Choose an ARC welder?

When it comes to choosing an ARC welder there are certain criteria that each type meets, and unfortunately, there is not one single process of welding that is suitable for all applications. To help you in this choice we are providing a selection of the best ARC Welders in 2025.

As with all welding machines, each Arc welder has its own benefits and features, and its important to check product specifications before purchase.

Some arc welders offer a higher welding current and amperage than others, while some provide a high welding speed and duty cycle, which can help with overall welding efficiency. Many of our MMA welding machines also benefit from inverter technology which is a game-changer compared to traditional transformer-based arc welders. An inverter arc welder works by converting AC power supply into DC, which is then converted back into a super-high frequency alternating current and filtered to create a highly-stable and precise welding arc. This inverter technology again helps with the end weld accuracy and quality.

Another feature to look out for when choosing your arc welder from our collection above is portability. Having a lightweight, versatile and portable arc welder can be highly beneficial in many different industrial settings and inverter MMA welders have a significant advantage in this area due to their lightweight nature compared to transformer stick welding machines. This portability helps the welder adopt various different welding positions easily, which is ideal for repair welding, for example.

You should always take into consideration:

The intended use, is it for occasional maintenance, production, or for high-quality welding? You must determine the type of welding projects you will be working on e.g. home repairs, automotive, heavy fabrication, or hobby projects. You will also need to know if you need a portable or a stationary welding machine.
What type of material will you be welding? Consider the type of materials you will be welding e.g. steel, aluminium, or stainless steel.
How thick is the material you will be welding? Make sure your arc welder is powerful enough for the welding application.
What power supply do you have access to? Consider the power source available in your workspace. Arc welders are normally available in 110V, 220V, and 3-phase. Choose a welder that matches your available power source, or be prepared to install the necessary electrical circuit.
What is the machine’s duty cycle, and how would this affect the work you intend to do? Match the duty cycle to your expected usage; higher duty cycles are suitable for professional welders.
What amperage range do you require? Ensure the welding machine’s amperage range is suitable for your welding needs. Different projects may require varying amperage settings. Look for a welder with adjustable controls, allowing you to fine-tune settings like amperage and voltage.
Other features to consider may include built-in safety mechanisms, digital displays, pre-programmed settings for ease of use, warranty, and brand reputation.

By answering all these questions, you are sure to find the ARC welder that most suits your needs.

MMA Welding key questions.

What is Hot Start?

Hot Start is a special feature for MMA or stick electrode welding. The machine delivers a peak of current when striking the arc, which significantly increases the ease of starting electrodes. Especially useful for an imperfect surface job or when using ‘difficult to run’ electrodes.

What is Arc Force?

Sometimes referred to as ‘Dig’ or ‘Arc Control’, it is a similar feature to Hot Start, except that it operates during the welding process. It greatly assists in stabilising the arc, preventing it from cutting out during the weld and preventing the electrode from sticking, as when it senses a short circuit the machine will deliver a peak of current.

What is Anti-Stick?

Anti-stick is a feature whereby the welding machine will sense when the electrode is sticking, where it will collapse the welding current to prevent the electrode from continuing to weld itself to the job, allowing it to be easily detached or broken free.