Drilling

Drilling is nothing else but a method of making holes in a solid material using a one-, two- or three-blade tool, called a drill. Holes can be made at once or in several stages, but then you need to leave a certain allowance of material to subject it to further processing. The holes obtained by this method do not have an ideal shape or size and in addition, are characterized by high roughness. Depending on the type of drill, the hole can have a circular or polygonal cross-section.