Shears, brakes & spot welders · review
Twenty pieces of 3 mm (0.12 in) mild steel cut to the same size — the cheapest way to learn a weld without ruining the thing you meant to make.
Where we come out Twenty identical pieces of 3 mm (0.12 in) steel with the thickness published three ways — the cheapest thing in this hub, and the one that makes every setting on the machines here testable.
Every capacity on this page is quoted in mild steel of a stated thickness, and every machine setting on this site is a wire speed or an amperage for a given thickness. This is that steel: twenty pieces, 2 by 4 inches, 11 gauge — 3.05 mm (0.12 in), 0.11 in, published all three ways on the listing.
What a coupon buys is repeatability. A test weld on an offcut tells you that something worked once on metal you did not measure; twenty identical pieces let you change one variable at a time and write the result down. For anyone setting up a new machine, or proving a parameter before cutting into the thing they actually want to build, that is the difference between learning and guessing.
Three millimeters is also the right thickness to own. The entry MIG and stick machines in this hub are rated for roughly that in a single pass, the shears on this shelf are rated in gauges either side of it, and 3 mm (0.12 in) is thick enough to show burn-through and thin enough for a 140-amp machine on a domestic socket. What the listing does not publish is any grade beyond “mild steel”, or the surface condition — mill scale has to come off before a clean weld whatever the steel is.
Read on the day this page was built: $30 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.
| Amazon reference | B09FKC6YMT |
|---|---|
| EAN | 0727431700421 |
Because a test only tells you something if the next test is the same. Setting wire speed and voltage on a 3 mm (0.12 in) butt joint, then repeating it on an offcut of unknown thickness, proves nothing — the parameter that worked was for the metal you happened to pick up. Twenty identical 2 by 4 in pieces at a published 11 gauge make a settings chart possible, which is the whole point of a coupon.
It is the most useful single thickness for the machines on this site. The entry MIG and stick machines in this hub are rated around 3 mm (0.12 in) in a single pass, the sheet shears here are rated in gauges either side of it, and 3 mm (0.12 in) is thick enough to show a burn-through and thin enough to weld with a 140-amp machine on a domestic socket. What it will not tell you is how the same machine behaves on 1 mm (0.04 in) panel or 8 mm (0.31 in) plate.
Gauge is an old sheet-thickness scale that runs backwards — the bigger the number, the thinner the steel — and it is still how American sheet is sold. The listing publishes all three forms: "11Gauge≈3.05mm (0.12 in)≈0.11inch". That is worth more than it looks on a shelf where the machines are rated in millimeters and the stock is sold in gauges.
Details checked on October 7, 2026.
Learning a process, setting a machine, or proving a parameter before it touches real work
Amazon reports what buyers took in the month before this page was last checked: at least 200.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for welding and metalworking machines and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
500 mm (19.7 in) blade · bench-fixed · 1.5 mm (0.06 in) test cut · €189
Half a meter of blade — the first machine here that cuts a panel edge in one stroke.
Best for: Panel work: cutting sheet to size cleanly, in one pull
A36 cold rolled · 16 GA / 1.52 mm (0.06 in) · 36 × 24 in · made in USA
A named steel grade at a published thickness, in a sheet big enough to cut a bracket from — and the only item in this hub that states what the metal actually is.
Best for: Brackets, repair plates and shop fixtures, where the grade and the gauge both have to be known
≈ $60
1,000 mm (39.4 in) working width · bends to 135° · shear included · €370
A meter-wide folder with a shear on the same frame — bending and cutting in one machine.
Best for: Making boxes, trays, brackets and flashings from sheet, start to finish
