Rotary tool, in particular drill

Abstract

In order to provide a rotary tool, in particular a drill (2), with a long service life together with high-quality drill holes, particularly in the case of through bores, the invention provides a cutting head (4) which extends along a rotational axis (10) and has a plurality of main cutting edges (6, 8) which extend radially outwards and each end at a cutting corner (16) having a corner bevel, wherein the corner bevels are of differing designs, specifically in the form of a roughing bevel (18) and in the form of a finishing bevel (20).

Description

technical field [0001] The invention relates to a rotary tool, in particular a drill comprising a cutting head extending along an axis of rotation and having a plurality of main cutting edges extending radially outwards and Each tip has a corner bevel at a cutting corner at the circumference of the cutting head. Background technique [0002] Such a cutting tool designed as a rotary tool is known, for example, from DE 20209767 U1. [0003] For example, during cutting operations with drills, but also by reamers, milling cutters, especially end mills, step drills, deep hole drills or "side-and-side cutters", it is often a problem that these rotating tools Medium cutting corners are subjected to high mechanical and thermal loads at the same time. In order to reduce this load, it is known to provide "corner bevels" at the cutting corners. Due to this corner bevel, the main cutting edge does not extend straight over the circumference. Consequently, no cutting corners with shar...

AI Technical Summary

Problems solved by technology

[0003] For example, during cutting operations with drills, but also by reamers, milling cutters, especially end mills, step drills, deep hole drills or "side-and-side cutters", it is often a problem that these rotating tools Simultaneously high mechanical and thermal loads for medium cutting corners

However, at the same time, there is a problem that when forming a through opening (such as a through hole), the unwanted burr at the exit of the drilled hole increases.

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