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