Patent ID: 11883887
Assignee: MK-TOOLS-SERVICE GMBH
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 19:
20. Drill, comprising:
a base body extending substantially longitudinally in a direction axial to a drill axis, said base body comprising a drilling portion,
the drilling portion extending in a direction axial to the drill axis up to a face side, the face side being arranged at a front of the drill,
a radially inward core region in relation to the drill axis and a radially outer region provided in the base body in the drilling portion,
the drilling portion comprising a core part in the core region and a plurality of spiral-shaped recesses in the outer region,
a plurality of wall parts, each of the plurality of wall parts arranged between two respective spiral-shaped recesses, each of the plurality of wall parts extending spirally along an axial extent of the core part up to the face side, and
at least four central cutting edge portions, each of the at least four central cutting edge portions extends along the face side radially inwardly, in relation to the drill axis, up to a front tip point at the drill axis, wherein each of the at least four central cutting edge portions is of a cutting configuration.