Sealey Mightymig100 Professional No-Gas Mig Welder 100Amp 230V

Having only used an arc welder before, this was a new experience for me, but if anything, mig welding is even easier than arc, with one proviso - you have to pull the trigger to advance the welding wire and complete the circuit, or nothing will happen. (It sounds stupid, I know, but this apsect caused me some scratching of the head, initially).I ordered this inexpensive welder, which was delivered very quickly and tested it using two pieces of 5mm steel, which is probably at the top end of what you can weld with this machine. Following the instructions supplied, it was relatively easy to set up, install the welding wire and be ready for the first weld. I tacked the weld and followed up with filling in between the tacks. It took me three goes to get the wire speed and power correct, (7 and Max, respectively), and to produce a weld I was completely happy with, but found the process comfortable and quite easy, with no sticking to the metal, with the welding wire flowing smoothly into the weld and pulling away cleanly at the end. I was initially concerned that the depth of the weld may have been insufficient with this thickness of steel and ground away the weld to find that there were no visible cracks and the job held together soundly. Tacking for two seconds and moving reasonably slowly with a to-and-fro arcing movement, produced a good weld that was strong and not unattractive.Overall, I am very pleased with this machine: it is finished nicely and works well, being considerably cheaper than many on the market for a similar spec. It comes supplied with 0.45kg of welding wire. There is some spatter, when welding and quite a lot of fumes, so you need to work in a well ventilated work space or use extraction; other than that, it produces quite a clean weld with little slag to chip away. All the other reviews for this maching are good and I can agree that this is well worth the money and good for a new welder or one new to mig welding, as I am - a good machine to start out on and not a bad one for experienced welders who want something inexpensive to use in the home workshop.

Before reading this review you should know a bit about my experience in welding - that won’t take long as there isn’t any; I’m a complete novice.I did quite a lot of research before deciding what welder to get and settled for gasless MIG welding because I am only ever going to be a light hobbyist so I don’t want to be messing around with gas mixtures etc… and this seemed a reasonably straight forward entry point.The reason for picking the Sealy Mighty MIG was quite simple - it’s cheap, good reviews and I had about £100 worth if Amazon vouchers.I’m pleased to say this welder has been excellent for my purposes and I would not hesitate to recommend it but here’s some more detail;SetupQuite straightforward, you have to assemble the handle and closing mechanism but that’s easy enough. The initially scary bit is the first time you install the wire spool - it comes with a spool of 0.9mm flux core welding wire - as the instructions make quite a big deal about getting the tension right, feeding it through, don’t overtighten, don’t let it unravel. Anyway I managed, it wasn’t too difficult and I imagine it will be a lot easier next time now I know what I’m doing with it.Using the welderFirst task - butt welding some 5mm x 50mm mild steel flat bar together, this was quite easy once I’d had a practice on some scrap pieces to get the wire speed and timing right. I found the method that worked for me was to take the wire speed down to about a third and go slowly to allow enough time for the arc to penetrate the steel. Patience and a steady hand are the key. On the full power setting the welder did not fully penetrate 5mm and I flipped over the piece and welded it from both sides but this is what I expected from a relatively low amp welder.Second task - welding some 1mm thick sheet to the 5mm flat bar, this was much trickier! There are only two setting for power on the mighty mig, Min and Max and I found even on the Min setting I was burning through the 1mm steel quite quickly. I went away and did some research on YouTube and after some experimentation I welded in 1 second bursts, just fast enough to keep the bead of molten steel going but not long enough to burn through. This took some practice to get right though!I did have an issue at one point where the wire wasn’t feeding through and after trouble shooting the feeder mechanism and finding nothing I found it was jammed in the contact tip as the wire has fused over the end for some reason. I have a small wire brush that fixed the issue.FinishWell, I’m a beginner, it was a bit rough to be honest and I understand that if you use gas MIG welders or even TIG you can get a much neater finish but neatness wasn’t a major concern and I did find with practice I was getting better.It does fire off a few ‘clinkers’ but these are easily knocked off and that probably says as much for my lack of technique as much as anything.Overall then I would heartily recommend this welder for someone as inexperienced as me although if you intend welding a lot if material 1mm thick or under I would perhaps consider one with more lower power settings.

I am a skilled welder by trade and I was sceptical about the product. I bought it just to do a bit of welding on my car. The machine is fine and is good enough for the money. However I don't rate the fluxcore wire that comes with it. I should have bought a machine that uses gas or buy some better wire. It leaves porosity throughout the weld therefore making it a weak weld. I know how to weld and have got high standards and work for oil and gas industry. Welds are inspected to xray standard. I have prepped all material to be welded but still I get porosity. It will do the job, just not very good.Tip......always keep the torch lead as straight as possible. Any kinks will cause you hassle with wire snagging inside. Don't over tighten the wire feed rollers as this too will give you hassle.If the wire was good then I would've given 5star