The most used, the most feared · review
Variable speed at €61 — which matters because stainless, paint and thin sheet all want a slower disc than steel.
Where we come out Fifteen euros more than the 7-125 for a genuinely different capability.
The GWS 9-125 S adds two things to the machine above it: 180 more watts and a speed dial, for €15.
An angle grinder runs at around 11,000 rpm because that is what a cutting disc wants. Almost everything else you do with the tool works better slower. A flap disc on stainless at full speed puts enough heat in to discolour the surface and pull thin material; the same disc at 5,000 rpm cuts cool. Wire brushing paint at full speed throws bristles; slowed, it lasts. Polishing, sanding and working plastics all need the range this machine has and the cheaper one does not.
Preselection rather than a trigger-controlled speed means you set it, and the machine holds it — which is what you want when both hands are busy.
No brake and no restart protection. As with the GWS 7-125, the machines that have them start around €70 on this page, and the FLEX at €279 has all three.
Power, speed range, preselection and disc diameter come from the manufacturer’s published specification. Market availability was verified per market on the EAN.
Prices quoted in this text were read on 2026-08-13. The live price is at the top of the page.
| Power | 900 W |
|---|---|
| No-load speed | 2,800 – 11,000 rpm, preselectable |
| Disc diameter | 125 mm (4.92 in) |
| Part number | 0601396104 |
| Amazon reference | B078HR358D |
| EAN | 3165140923118 |
Because heat is the enemy on several materials. Stainless discolours and warps if you run a flap disc at full speed; paint and plastics melt and clog the abrasive rather than being cut; thin sheet goes blue and distorts. Dropping to 4,000 to 6,000 rpm keeps the work cool enough to stay flat and the disc clear enough to keep cutting.
It means less surface speed at the rim, not less torque available. What you lose is aggression, which is precisely what you wanted to lose. Where it does cost you is in cutting: a cut-off disc is designed to run near its rated speed and will burn rather than cut if you slow it excessively.
6.9/ 10
Fifteen euros more than the 7-125 for a genuinely different capability.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom. Listed is not the same as in stock — availability changes daily.
Details checked on August 13, 2026.
Mixed work — stainless, painted steel, thin sheet — where full speed is the wrong answer
Here because the consumable states this machine by name.
Amazon reports what buyers took in the month before this page was last checked: at least 300.
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.
1,400 W · constant electronic · soft start · €100
The same 1,400 W as the Metabo beside it, with a soft start it does not have and a quick-change nut it does.
Best for: Steady, heavy grinding where the machine runs for minutes at a time
720 W · 176 mm (6.93 in) grip · flat gear head · €46
The cheapest professional-line grinder here, bought for its 176 mm (6.93 in) grip and its flat head rather than its power.
Best for: Light dressing, deburring and short cuts, where the tool is picked up and put down all day
800 W · restart protection · soft start · €70
The cheapest machine here with restart protection — the feature that stops a grinder starting by itself.
Best for: Anyone who leaves tools plugged in — which is everyone, eventually
