A welder is an easy tool to buy on the wrong number. People chase the biggest amperage on the box and ignore the duty cycle, the process, and whether the machine even runs off their socket. Black Friday 2026 is the best window of the year to buy one at a sensible price, but only if you know what actually matters before the discounts land. This guide explains MIG against MMA against TIG, why duty cycle and amperage decide what you can really weld, gas against gasless, inverter against transformer, and how to tell a genuine saving from an inflated RRP. Then it points you at live Amazon searches so you always see the current price on the day.
Before you compare any two welders, get clear on the handful of things that decide what you can weld and how long you can keep going. These are what separate a machine you fight with from one that does the job.
MIG, also called wire-feed, is the easiest to pick up and the most versatile for car panels, fabrication and general steel. MMA, also called stick or arc, is simple, cheap and robust, good on thicker steel and outdoor work where a breeze would disturb gas. TIG gives the cleanest, most controlled welds and handles stainless and aluminium, but it takes the most practice. Many modern inverter machines are multi-process, running MIG, MMA and sometimes TIG from one unit, which is the flexible choice if your work varies.
Duty cycle is how long a welder can run at a given amperage before it needs to cool, quoted as a percentage over a ten minute window. A machine rated 60 percent at 100 amps welds for six minutes then rests for four at that output. A big headline amperage with a tiny duty cycle means lots of waiting on longer runs. Compare duty cycle at a realistic working amperage, not at the maximum the box shouts about.
Match amperage to the metal you weld. Roughly 130 to 180 amps covers car panels, brackets and light fabrication. Step up to 200 amps and beyond for thicker steel, trailers, gates and heavier structural work. Buying far more amperage than you need adds cost and can trip a domestic supply, so size the output to the thickest metal you weld often, not the thickest you can imagine.
On MIG, a gas machine uses a shielding bottle for cleaner, tidier welds with less spatter, ideal indoors and on bodywork. A gasless machine runs flux-cored wire that shields itself, needs no bottle and copes outdoors, with more spatter to clean up. Inverter welders have largely replaced old transformer units because they are lighter, more efficient, start more smoothly and often pack more features, which is why most sensible Black Friday buys are inverters.
Most hobby and light-trade welders run on a normal 230 volt socket. Higher-output machines can need a dedicated supply, and some site and industrial units run on 400 volt three-phase. Check the plug on the welder against the socket you actually have before you buy, because a brilliant deal is no deal if you cannot power it.
| If you mostly do | Sensible choice | Why |
|---|---|---|
| Car panels, light bodywork, brackets | 130 to 180A inverter MIG (gas or gasless) | Easy to learn, clean enough for thin steel, runs on a normal socket |
| General fabrication, mixed jobs | 200A+ multi-process inverter | MIG, MMA and often TIG in one, covers the widest range |
| Thick steel, gates, trailers, outdoors | MMA (stick) or high-amp MIG | Robust on thick metal, stick copes with wind and rust |
| Stainless and aluminium, precision | TIG (AC/DC for aluminium) | Clean, controlled welds on thin and non-ferrous metal |
| Occasional DIY and repairs | Entry inverter MIG or stick | Affordable, light, enough for the odd job |
The UK market runs from budget inverters to serious professional machines. The right pick depends on how often the welder works and whether you need portability, multi-process or precision.
Read our full ranked buyer's guide before you commit to a model, then use the live searches below to check the current Black Friday price.
These open a live search on Amazon so you always see the price on the day, never a figure that has gone stale. Read the guides first so you know which process and amperage is right for you.
Buying one tool at Black Friday usually means pricing up the rest of the kit at the same time. These category guides pair naturally with a new welder.
Done this way, Black Friday stops being a scramble and becomes the one time a year you buy the welder that actually matches your work, at a price that stacks up. The clearer your shortlist, the less chance a loud headline deal pulls you off plan.
Black Friday 2026 is Friday 27 November, with Cyber Monday on Monday 30 November. Deals realistically run from the Monday before, around 23 November, through the following week, and early-access offers now begin in early to mid November, so it pays to have your shortlist ready before the date.
For most people a MIG welder is the easiest to learn and the most versatile for car panels, fabrication and general steel, especially an inverter MIG that also runs flux-cored wire. MMA, also called stick or arc, is cheap, simple and good for thicker steel and outdoor work. TIG gives the cleanest, most precise welds and handles stainless and aluminium, but it has the steepest learning curve. If in doubt, a MIG or a multi-process machine covers the widest range of jobs.
Duty cycle is how long a welder can run at a given amperage before it has to rest, quoted as a percentage over ten minutes. A machine rated 60 percent at 100 amps can weld for six minutes then cools for four at that output. A tempting headline amperage with a very low duty cycle means lots of waiting on longer jobs, so compare duty cycle at a realistic working amperage, not just the maximum figure.
A gas MIG uses a shielding gas bottle and gives cleaner, tidier welds with less spatter, which suits indoor fabrication and bodywork. A gasless MIG runs flux-cored wire that shields the weld itself, so it needs no bottle and copes better outdoors and in a breeze, at the cost of more spatter and cleanup. Many inverter MIG machines do both, which is the flexible choice if you are unsure.
Match amperage to metal thickness: roughly 130 to 180 amps handles car panels and light fabrication, 200 amps and up suits thicker steel and heavier work. Most UK hobby and light-trade welders run on a normal 230 volt socket; higher-output machines may need a dedicated supply, and some site and industrial units run on 400 volt three-phase, so check the plug and the socket you have before you buy.
Check the genuine three to six month price history rather than the retailer's was price, compare the same model across more than one seller, and be wary of a welder that is always on offer. A real saving is measured against the recent low, not an inflated reference price. Factor in the kit you still need, like an auto-darkening helmet and gas, and always check the current price on the day because stock and pricing change through the week.