Today, in times of increasing demand for technical and construction services, a certified professional is at a premium.



Particularly appreciated by amateurs and in workshops not strictly specialised in welding. They consist of a ground cable with clamp, a cable with electrode holder and a current source. In addition, two more sub-categories can be distinguished in this group:

  • Transformer welders - Inverter welders - lighter, more efficient and energy-saving. Price proportionate to quality.


Used for welding metals, possibly thicker aluminium components. Most commonly found on production halls and construction sites.


Furthermore, an inexperienced welder will not experience the full capabilities of this welder.

So how do you choose a welding machine for yourself? Here is a list of the most important criteria you should consider.

  • Amperage - the thicker the material the higher the amperage, the more current it consumes and the more stable the electrical installation requires. Welders up to 250A are used amateur or in production workshops. Above this value - on construction sites and in industry.
  • Efficiency/operation cycle. The percentage of time the appliance operates per 10 minutes. For example, if the manufacturer reports an efficiency of 80% he means 8 minutes continuous operation and 2 minutes off.

ATTENTION: Under no circumstances should you buy a welding machine whose specification does not mention the duty cycle!!!

Power supply. There is a choice between three options


- 0.8 mm thick wire - maximum 1 mm thick sheet,

- 1.2 mm thick wire - 2 mm to 8 mm thick sheet metal,

- 1.6 mm thick wire - 8 mm to 16 mm thick sheet metal,

- 2 mm thick wire - 16 mm and over sheet metal.

If you go to the hardware shop looking for a welding wire, you will come across the markings SG3 (G4SI1) and SG4 (G3SI1). These indicate the grade of wire. In addition to homogeneous wires, there are also cored wires (so-called powdered wires) marked as FCAW (Flux-Cored Arc Welding). It is characterised by an internal filling with flux (e.g. chlorine and nickel for alloy steels) or substances which give off neutral gases after combustion. This wire is more expensive than commonly used and requires special welding machines to function. Most commonly used in the shipbuilding industry.


Man in full welder's protective suit

Apron, gloves and most importantly - mask! Regardless of the quality of the equipment and the craftsmanship of the professional qualifications... without the right clothing, using a welding machine is pure folly. This is why the careful selection of health and safety articles is so important.

EN ISO 11611 - this is the official designation of the standard which certified welding clothes must comply with. It is worth remembering that it should be made of materials of natural origin. They are harder to set on fire, and in case of an incident they do not melt and do not stick to the skin.

Dimming, on the other hand, is measured in DIN units. The higher the dimming, the safer our eyesight is, but it is also more difficult to check the results of our work. This is why it is better to aim for slightly more expensive, but safer and more efficient automatic visors.