Patent ID: 11969806
Assignee: KYOCERA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. A cutting tool, having a columnar shape extended along a rotation axis from a first end toward a second end, the cutting tool comprising:
a holder comprising:
a first pocket located on a side of the first end,
a second pocket located closer to the second end than the first pocket,
a first flute extended along the first pocket from the first end toward the second end; and
a second flute extended along the second pocket toward the second end;

a first insert located in the first pocket; and
a second insert located in the second pocket,
wherein:
a first distance from the rotation axis to the first flute in a first cross section that is orthogonal to the rotation axis and includes the first flute is a first length,
a second distance from the rotation axis to the second flute in a second cross section that is orthogonal to the rotation axis and includes the second flute is a second length,
an opening width of the first flute in the first cross section, that is orthogonal to the rotation axis and includes the first flute, is a first opening width,
an opening width of the second flute in the second cross section, that is orthogonal to the rotation axis and includes the second flute, is a second opening width, wherein the first opening width is smaller than the second opening width, and
a flute depth of the first flute is larger than a flute depth of the second flute, wherein the flute depth of the first flute is defined as a radial distance of an outer circumference of the holder in the first cross section minus the first length, and the flute depth of the second flute is defined as a radial distance of the outer circumference of the holder in the second cross section minus the second length.