Abstract: A solid drill bit for machine tools has a drill bit body and two indexable inserts arranged at a radial distance from one another in respective insert seats. The inserts have an essentially quadratic contour. Their front-end main cutting edges project axially beyond the drill bit body and radially overlap one another. The outer insert has an outer insert corner and a secondary cutting edge perpendicular to the main cutting edge that projects radially beyond the circumference of the drill bit body. To permit burr-free through-drilling, the main cutting edge of the outer insert is subdivided in its longitudinal extent into a radially inner working section and a rectilinear peeling section adjoining the working section and extending to the outer insert corner. The sections enclose a setting angle of 95° to 120°. The peeling section is set at a positive setting angle of 72° to 87°.

Abstract: A solid drill bit for machine tools has a drill bit body and two indexable inserts arranged at a radial distance from one another in respective insert seats. The inserts have an essentially quadratic contour. Their front-end main cutting edges project axially beyond the drill bit body and radially overlap one another. The outer insert has an outer insert corner and a secondary cutting edge perpendicular to the main cutting edge that projects radially beyond the circumference of the drill bit body. To permit burr-free through-drilling, the main cutting edge of the outer insert is subdivided in its longitudinal extent into a radially inner working section and a rectilinear peeling section adjoining the working section and extending to the outer insert corner. The sections enclose a setting angle of 95° to 120°. The peeling section is set at a positive setting angle of 720° to 87°.

Abstract: The invention relates to a solid drill bit for machine tools. The solid drill bit has a drill bit body (10) and two indexable inserts (20, 22) which are arranged at a radial distance from one another in a respective insert seat (16, 18) of the drill bit body (10) in the region of a chip flute (12, 14). The indexable inserts (20, 22) have an essentially quadratic contour. They project with their front-end main cutting edges (30, 34) axially beyond the drill bit body (10) and overlap one another radially in their active region. The radially outer indexable insert (22), with its outer insert corner (36) and with its adjoining secondary cutting edges (38) perpendicular to the relevant main cutting edge (34), projects radially beyond the circumference of the drill bit body.