Updated: 2011-08-26 10:37:03
Special chainsaws are used to cut concrete, brick and natural stone. These use similar chains to ordinary chainsaws, but with cutting edges embedded with diamond grit. They may be gasoline or hydraulically driven, and the chain is lubricated with water, because of high friction and to remove stone-dust. The machine is used in construction, for example in cutting deep square holes in walls or floors, in stone sculpture for removing large chunks of stone during pre-carving, by fire departments for gaining access to buildings and in restoration of buildings and monuments, for removing parts with minimal damage to the surrounding structure.
Because the material to be cut is non-fibrous, there is much less chance of kickback. Therefore the most-used method of cutting is plunge-cutting, by pushing the tip of the blade into the material. With this method square cuts as small as the blade width can be achieved. Pushback can occur if a block shifts when nearly cut through, and pinches the blade, but overall the machine is less dangerous than a wood-cutting chainsaw.