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

Claim 32:
33. Drill, comprising:
a base body extending substantially longitudinally in a direction axial to a drill axis, said base body comprising a drilling portion,
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 plurality of spiral-shaped recesses in the outer region,
a wall part arranged between each two spiral-shaped recesses,
at least four main cutting edges, which extend radially inward, in relation to the drill axis, up to a front tip point at the drill axis, and
each of the at least four main cutting edges comprises a curved main cutting edge outer portion extending in the outer region.