Rotary drilling tool as well as method for producing a through-hole
OwnerHerbert Kauper, Marcus Paul +1inventors
InventorsHerbert Kauper, Marcus Paul, Juergen Schwaegerl
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Abstract
A rotary drilling tool (10) has a cutting head (12) with at least one tip (22) and a front-facing main cutting edge (24) defining a maximum diameter (D) of the cutting head (12). The cutting head (12) has an undercut (38) with a radially inwardly springing ledge (44) with a rear-facing blade (42) provided for cutting when pulling the rotary drilling tool (10) out of a workpiece. Furthermore, a method is provided for producing a through-hole in a workpiece by means of such a rotary drilling tool (10).
Claims20
A rotary drilling tool having an axis of rotation, a shaft, and a cutting head, which has at least one tip and a front-facing main cutting edge defining a maximum diameter of the cutting head, characterized in that the cutting head has a tip-side axial portion, a shaft-side axial portion, and at least one undercut extending axially between the tip-side axial portion and the shaft-side axial portion, wherein the undercut has a radially inwardly springing ledge, which has a rear-facing blade on a side facing away from the tip, which edge is provided for cutting when the rotary drilling tool is pulled out of a workpiece.
Dependencies are inferred from the claim text.