How to Use an Electric Angle Grinder to Cut Flagstone

Quck answer

Cutting flagstone with a grinder can be a quick and efficient way to shape and size the stone for your desired project. To begin, gather the necessary tools including a grinder with a diamond blade, safety goggles, and a dust mask. Mark the desired cut lines on the flagstone and begin cutting with the grinder, using steady and even pressure. Take breaks to prevent overheating the grinder and to remove dust buildup. Once the cut is complete, use a chisel and hammer to break off any remaining pieces. Remember to always prioritize safety by wearing protective gear and working in a well-ventilated area.


Flagstone is a popular choice for patios, walkways, and walls due to its flat and thin shape. However, cutting flagstone into smaller pieces can be challenging. To successfully cut flagstone, it is important to have the right tool and follow safety guidelines. An electric angle grinder is the most effective tool for this job. Choose a grinder with a motor that draws between 5 and 9 amps and a dry-cut diamond wheel for cutting masonry. Before cutting, take safety precautions such as working outside, wearing a dust mask, goggles, and work gloves, and ensuring that no one else is in the vicinity. Prepare the flagstone by marking the cut line with a ruler or tape measure and let the diamond wheel run for a minute to ensure its usability. When cutting, secure the stone on a flat surface with a clamp or your foot and position the grinder to prevent debris from flying back at you.

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