The most used, the most feared · review
Bought for the labyrinth seal — the detail that decides whether a grinder survives a year of grinding its own dust.
Where we come out The durability choice at this price, and it lacks every safety feature the DEWALT beside it has.
Seventy-seven euros, 840 W, and a specification that reads like nothing until you have worn out a grinder: a labyrinth seal protecting the bearings and gearbox.
An angle grinder throws a cloud of abrasive dust and simultaneously pulls cooling air through its own body. The dust it makes is the dust it breathes, and it is precisely the material that destroys bearings — hard, fine and everywhere.
A labyrinth seal puts a maze of interlocking channels around the shaft, so debris cannot follow a straight path inwards and is flung out instead. On dusty work — rust removal, foundry cleanup, farm repair, anything near masonry — it is the difference between a machine that lasts and one that starts to howl after a season.
The DEWALT above costs €7 less and has restart protection and soft start; this one has sealing and a heat-resistant motor. Those are different kinds of insurance: safety against surprise starts, or longevity in dust. Neither machine has a brake, and neither has kickback detection.
Choose by which risk is actually yours. If tools live plugged in on a bench, take the DEWALT. If your work is filthy, take this.
Power, disc diameter, bearing protection, motor description and part number 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 | 840 W |
|---|---|
| Disc diameter | 125 mm (4.92 in) |
| Bearing protection | Labyrinth seal against dust and debris |
| Motor | Heat-resistant, specified for long service life |
| Part number | 9558NBRZ |
| Amazon reference | B01G5BM0KU |
| EAN | 0088381808774 |
It is a series of interlocking channels around the shaft that debris cannot travel through in a straight line, so dust is thrown out rather than drawn into the bearings. It matters because an angle grinder generates a cloud of abrasive dust and then draws cooling air through itself — meaning it inhales exactly the material that destroys bearings. On dusty work, sealing is what decides the machine’s life.
Differently rather than better. The DEWALT has restart protection and soft start — safety features. This one has sealing and a heat-resistant motor — longevity features. If you work in dust, this survives longer; if you leave tools plugged in, the DEWALT is the safer buy. At seven euros apart, choose by which risk is yours.
6.9/ 10
The durability choice at this price, and it lacks every safety feature the DEWALT beside it has.
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.
Dusty work — masonry-adjacent grinding, rust removal, foundry and farm repair
Here because the consumable states this machine by name.
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
900 W · 2,800–11,000 rpm · speed preselection · €61
Variable speed at €61 — which matters because stainless, paint and thin sheet all want a slower disc than steel.
Best for: Mixed work — stainless, painted steel, thin sheet — where full speed is the wrong answer
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
