Patent ID: 11951553
Assignee: ISCAR, LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 9:
10. The cutting head (20) according to claim 9, wherein:
each chip evacuation passage (44) has a gash (60) extending axially rearwardly from the tip portion (22) and intersecting one of the head flutes (48),
each secondary cutting-edge portion β2) is formed at the intersection of one of the gashes (60) and one of the secondary relief surfaces (40),
a secondary rake surface (62) is disposed on each gash (60) adjacent the associated secondary cutting-edge portion (32),
in the cross-section taken in the fourth transverse plane (PT4), the secondary rake surface (62) is inclined at a fourth axial rake angle (β4) relative to the fourth imaginary radial plane (PR4), and
the fourth axial rake angle (β4) is negative.