Best Flux Core Welders Reviews & Buying Guide (2020)

Forney makes a lot of great products for beginners, and this is no exception. Made specifically to be easy to use for hobbyists and DIYers. The only thing in its design that doesn’t really speak to that is it’s a bit finicky on what materials to use. The performance suffers if .35” wire is used over .30” for example.

It’s also a bit bulky (42 lbs), which makes it hard to lug around by hand.

Still, aside that its specs are great. The 120 volt input and 125 amp output are respectable for a machine of this size, though won’t be winning any records for power. It welds 24 gauge steel up to ¼ inch. This makes it great for most do it yourself projects, though struggles to produce more delicate welds.

It can use both 2 and 10 pound spools for a bit of flexibility in how you buy your wires, though as mentioned it definitely prefers a certain thickness over any others. It requires no shielding gas to work (a “self shielded” model). This makes it easier to move around for very little cost in performance and safety.

Plus the stainless steel construction is sturdy and durable, so I should last you a long time.

This lightweight flux core welder is about as good as you can get for a dedicated flux core only welding machine. It’s pretty lightweight (only 35 lbs) so it’s easy to lug around wherever you need it.

On top of that it boasts 4 flow speeds (min, max, 1, and 2), adjustable by simple switch flipping for easy and quick adjustments and 10 wire feed rates, adjustable by a knob, and full safety controls on the welding gun. Since it uses no gas canisters, it’s easier to set up and use than welders that need shielding gas. The machine as a whole is easy to set up and get to work immediately. Not much harder than jumping off a car.

The inert gas inside of the wire reduces oxidation in the weld, leading to smoother welds, and there’s no need to clean the surface of the welding area before welding; the flux core welding process will cut through rust and similar contaminants.

Dual air vents increase heat dissipation for a longer run without overheating. Some simple accessories are included (a basic welding mask and a brush) which is nice, though they are no replacement for higher quality gear.

The top slides open to reveal storage space for accessories and other things you might want to carry with you. Could double as a simple toolbox for the absolute basics, which is more what I recommend using it for than storing the accessories it comes with.

This Reboot welder is very flexible in use, doing MIG, stick, and flux core welding in one convenient package. It welds metal to .8 mm (about 1/3 of an inch), making it a little better than most of these (that do ¼” at most).

Being an inverter model this is very energy efficient. It uses inverted and “stepped down” DC power to produce a steady, efficient AC output. The added price over some of the cheaper transformer models is likely to be outweighed in the long term by energy savings.

Keep in mind, however that inverter technology is relatively untested, being newer on the market than traditional transformers. Stress testing hasn’t quite caught up to the tech yet, so there could be some hiccups in unexpected situations, or there might not. The knowledge just isn’t there yet.

The last feature of note is that this is the lightest model on this list (only rivaled by the other inverter model below), weighing in at just under 12 lbs.

This unit is affordably priced and can get the job done, but cuts corners at a few spots to get that price down.

The positives first. It’s of a decent weight (38 lbs) for easy portability, and compact enough to store anywhere.  Its wave form control technology gives it adjustability for different weld requirements. This reduces spatter, increases performance and fusion depth. The copper tip on the welding gun reduces  slag buildup and is easy to replace.

It comes equipped with 4 speeds (min, max, 1, and 2) and 10 adjustable wire feed speeds with on/off safety control.

It boasts great flexibility on wires: flux cored wires .30” and .35”, and steel or carbon steel wires between .23” and .35”.

Unfortunately some major flaws hold it back. Mostly that it’s made of PVC rather than stainless steel. This reduces durability and actually ends up making it a bit heavier than it could be. It doesn’t help that being 110 v/60 hz only makes it fairly limited as far as these machines go in terms of its power output and the projects and metal thickness it can handle, and worse: it’s prone to overheating, or even melting in some cases due to poor heat protection. The largest casualty of the cost cutting. The welder should still be fine for infrequent use, but not as your go to daily welder.

If it weren’t for the flaws it’d be easy to recommend, but as is the major reason it gets a pass is it’s super cheap.

A good, cheap intermediate model that’s fine for most purposes, but held back by some truly huge flaws. Primarily the issue is that it only does mild steel, and couples that with a truly terrible duty cycle (20%, which means that after 2 minutes of use, It needs about 8 minutes to cool down).

This makes it fine for small projects, but not great for anything truly practical, being limited basically to spot welding mild steel only.

On the bright side it’s a very safe machine, kept electrically cold until the trigger is pulled. It also has a pretty solid overall design, having a comfortably long cable and running on household current, being compatible with pretty much any US power source.

It’s a tradeoff, but overall not a great machine for the price.

This is an old, tried and tested model that is proven reliable for both beginners and experienced welders. Unfortunately this also comes with some flaws of its own.

It’s versatile in what kind of wire it uses, being equally fine with standard MIG wire and flux cored wire, though significantly less so in what it works on. It only does mild steel, which was great in the past, but welders tend to be more versatile these days.

On the bright side, the working depth is great, from 24 gauge to 1/8” on mild steel. It’s also a “self shielded” model so no extra gas canister is needed, increasing portability so long as you’re using it with flux core wire (the MIG wire will still need shielding gas). Cold contact technology keeps welding wire electrically cold until trigger is pressed, keeping it safe to handle in both modes.

Unfortunately the cost is pretty hefty, being about twice as much as several other models that work on multiple materials. It’s a tradeoff on whether you need the MIG welding function or not. If not, the price is exorbitant for what it does, but if you do it might be worthwhile.