Conventional disc diameters are 115, 125, 150 and 230 mm. The most widespread models with diameters of 125 and 230 mm. Since the diameter of the wheel depends on the depth of the cut - with a larger disc you often don't have to cut twice. However with a larger blade grinder, the higher the power, weight and cost.
| disc diameter | cutting depth | Recommended motor power |
| 115 mm | 2 cm | min. 600 W |
| 125 mm | 2.5 cm | min. 750 W / opt. 1000 W |
| 150 mm | 3.5 cm | min. 1000 W / opt. 1400 W |
| 230 mm | 7.5 centimeters | min. 1800 W / opt. 2200 W |
- 230 mm - for example, to cut paving, concrete and cutting or grinding of large metal profiles.
- 125 mm - for example, for cutting thin tubes and flat profiles.
Weight
- Grinder, 150 mm weighs 1.5-3 kg.
- Grinder, 230 mm weighs 5-7 kg.
Number of revolutions
Grinders with larger wheels have a lower speeds. Differences between the different models of the same diameter discs are minimal. For 125 mm, grinding speed is in the range of 10 000 to 13 000 rpm, whereas the 230 mm models around 6500 rpm.
useful features
- Electronic grinders ensure constant speed - grinder maintains a constant speed regardless of the intensity level.
- Electronic overload protection - ensures a gradual ramp up to speed (protects against the failure of breakers).
- Run-out brake - stops the disc completely.
- Anti-vibration handle - making those longer jobs more bearable.
- Protecting against reconnection - ensures that the grinder doesn't restart itself in case of a short power failure.
- Electronic speed control - to reduce the speed of the discs (such as when working with stainless steel and concrete or stone cutting and polishing).
Blade to angle grinders
Sanding
Abrasive discs and angle grinders are used for machining surfaces made of metal and stainless steel. They will be used when sanding, welding, deburring, bending etc. They are produced in standard thicknesses from 4 to 8 mm.
- Lamella - for fine grinding and finishing welds. Suitable for work with stainless steel.
- Wire - coarse sanding and cleaning surfaces, removing rust, preparing materials before welding or removing adhesive residue on the tiles.
Cutting
They are used to cut workpieces made of stone, steel, iron, aluminum and plastics. Thinner discs with a thickness of between 0.8 mm and are designed primarily for cutting thin metal sheets, thicker disc to 3.2 mm is suitable for cutting thicker materials and profiles.
Diamond
They are used for cutting and grinding very hard, mostly construction, materials - concrete, brick, marble and natural stone. They are the most expensive.
Universal
Ideal for situations where you need to move frequently between cutting and grinding and do not want to delay the exchange. Do not expect them, however, to last, as the blades are designed specifically for mostly either cutting or grinding.
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