Abstract: The invention concerns a drill including a generally cylindrical body, tipped with a head and provided, over at least part of its length, generally spiral evaporating grooves. The groove(s) are delimited, over at least part of their length, by a succession of facets, attached to one another, and linked to one another by sharp edges or by radius blends.

Abstract: The invention concerns a drill comprising a generally cylindrical body (2), tipped with a head (3) and provided, over at least part of its length, generally spiral evaporating grooves (5). The groove(s) (5) is/are delimited, over at least part of its/their length, by a succession of facets (7), attached to one another, and linked to one another by sharp edges or by radius blends (8).

Abstract: This cutting insert, designed to be inserted into the cutting head of a drill or other similar rotary boring tool, has an arced overall shape, with a concave flank and a convex flank. These flanks are connected by a base face, by two straight end edges one of which is able to act as a guide for the drill and, at the opposite end to the base face, by at least one cutting part, with at least one cutting edge and/or at least one tip. Also described is a boring tool, the cutting head of which comprises such arced inserts, arranged laterally, and associated with a central insert.