In masonry, some materials are harder than others. A machine with great punching power is often essential.
The hardness of building materials is very varied. Drilling is not done by chip removal or wear of the material, but by disintegration. The drill bit for drilling masonry is identified by its tungsten carbide insert. It is associated with a perforator or a drill in percussion mode. To the rotary movement of the tool is added a striking action at very high frequency. In the percussion position, always work at low speed: otherwise the drill may warm up and lose its effectiveness. Note that marble, ceramic and various terracotta are hard materials that are pierced by simple rotation, without using percussion (such as plaster).
And the big diameters?
In masonry, there are drill bits adapted to each material. They drill holes of various diameters that allow among other things to embed the case of outlets and switches, to integrate the crossings of pipes or evacuations...
Groove a wall
This cutter is used to groove all types of masonry. It is easily mounted on a drill and is used without percussion. This allows you to install electrical ducts and water pipes without investing in a true grooving machine.
Thanks to the roller guide, this cutter makes it easy to create clean, straight grooves in most masonry applications.
To hollow out the central part, use a flat chisel mounted on a perforator in "chipper" mode.
Otherwise, do this work with a hammer and a hammer.