Kennametal Inc.
Step drill

Last updated:

Abstract:

The invention relates to a step drill having a shaft section extending along a longitudinal axis of the step drill and a cutting section with a cutting tip, and having a chip-breaking geometry which comprises a concavely curved surface and is configured such that ribbon chips are broken on the concavely curved surface during rotation of the step drill, whereby the chip-breaking geometry is disposed on a reaming step of the step drill.

Status:
Grant
Type:

Utility

Filling date:

9 Apr 2020

Issue date:

25 Jan 2022