Angle grinders Haisser

Haisser: power matched to every disc diameter

What an angle grinder is and what to look for

An angle grinder is one of the most versatile tools in any workshop: depending on the disc fitted, it cuts metal, grinds down weld seams, finishes surfaces or even cuts tile. The key spec when choosing one is disc diameter, which determines both the maximum cutting depth and the power needed to run that diameter comfortably without overloading the motor.

The Haisser line-up: from 125 to 230 mm

Haisser's range in this category spans nine models, from the compact cordless GA-212BC and GA-212S for 125 mm discs to the powerful corded GA-25 and GA-28 for 230 mm discs at 2500-2800 W. The compact 125 mm models — GA-10, GA-12S, GA-14SEC and GA-5030SE — cover the vast majority of household and semi-professional tasks: grinding weld seams, cutting thin metal profile, surface finishing. The GA-20 at 180 mm sits between the compact and heavy-duty machines, suiting regular but not constant work with thicker metal.

The more powerful 230 mm models, GA-25 and GA-28, are built for cutting rebar, thick steel stock and intensive finishing of large surfaces — jobs where a smaller disc can't cut deep enough in a single pass. The speed difference between models matters too: the compact high-speed machines (11,000-12,000 rpm) cut thin material faster, while the heavier models at 6,500-8,500 rpm compensate for lower speed with a larger disc diameter and more torque.

Cordless models, safety and service life

The cordless GA-212BC and GA-212S free you from a cable where that matters most — work at height, mobile installations, repairs done outdoors. That said, a cordless angle grinder always trails a corded one in continuous runtime, so for high-volume metal cutting, a corded model remains the more practical choice.

The disc guard, a mandatory safety element included with every Haisser model, adjusts to the working angle without tools. A side handle that mounts on either side of the housing lets you adapt your grip for left- or right-handed work and gives extra control under sideways load on the disc — especially important during cutting, where a disc can bind in the kerf.

When choosing between models built for the same disc diameter — say, the 1000 W GA-10 and the 1200 W GA-12S at 125 mm — usage frequency and intensity matter most: a 200 W gap goes unnoticed in occasional use but becomes decisive with daily metal cutting, where reserve power prevents motor overheating and speed drop under load. The GA-14SEC, with an extra 1400 W at the same disc diameter, is built precisely for that scenario of regular, intensive use.

Choosing by power and usage frequency

For a home workshop where the grinder sees a few uses a month for small repairs or hobby projects, a compact 900-1000 W model is more than enough — paying extra for a more powerful machine doesn't pay off there. For a construction crew or metalworking shop running the tool daily for hours, it's worth going straight for a model with 20-30% more power than the bare minimum: that reduces thermal load on the motor and extends the interval between services.

Gearbox and spindle bearing life depends directly on matching disc diameter to the job at hand: running a disc at the maximum diameter a model allows creates excessive gearbox load and cuts the machine's service life several times over compared to staying within rated parameters.

It's also worth checking the spindle lock mechanism when comparing models, since changing discs several times a shift is far less of a hassle with a reliable single-button lock than with a wrench-only setup. On the models where Haisser includes tool-free disc changes, swapping a worn wheel takes seconds rather than minutes — a small detail that adds up over a full day of cutting and grinding.

Pick a Haisser angle grinder by disc diameter, power and speed to match the materials and stock thickness you typically work with, and get a tool that handles the job without overload or premature wear, however many hours a week it spends in your hands.