Patent · US Active

Twist drill with a replaceable cutting insert and a rotary cutting tool with a replaceable cutting insert

US7591617B2 · kind B2 · utility

18Cited by

7References

12Claims

0Family size

Assignee

KENNAMETAL INC. · US

Inventors

Bernhard Borschert · Bamberg, DE
Dieter Muhlfriedel · Ebermannstadt, DE

Key dates

Filing date	Dec 11, 2007
Grant date	Sep 22, 2009
Priority date	—
Expiry date	Dec 11, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/90993
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A twist drill or rotary cutting device, in particular a drill, comprising a tool head or cutting insert consisting of a hard cutting material and a tool shaft which clamps the tool head between two clamp extensions that project axially from said tool shaft in such a way that the tool head is interchangeable. In the fixed position, the interconnected clamping surfaces of the tool head and the clamping extensions of the tool shaft lie on the surface of a truncated cone shaped fixing peg running coaxially with the longitudinal axis of the tool shaft. The fixing peg tapers in the insertion direction, facing the chuck end of the tool shaft.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.