Rotary tool
AssigneeKYOCERA Corporation
InventorsHiroshi Ogawa, Takaya Watanabe
Life of this patent
Estimating the term…
Abstract
A rotary tool according to a non-limiting aspect includes a body having a rotation axis and extending from a first end to a second end. The body including: a first part including the first end; a second part located closer to a second end than the first part and having a larger outside diameter than the first part; a cutting edge located at a side of the first end; a ridge portion located in the first part and the second part, connected to the cutting edge and helically extending from the cutting edge toward the second end; and a flute located along the ridge portion. The flute includes: a first flute located at the first part and having a first helix angle; and a second flute located at the second part and having a second helix angle. The second helix angle is smaller than the first helix angle.
Claims8
A rotary tool, comprising:
- a body having a rotation axis and extending from a first end to a second end, the body comprising:
- a first part including the first end;
- a second part located closer to the second end than the first part and having a larger outside diameter than the first part;
- a third part having a smaller outside diameter than the first part and located between the first part and the second part;
- a cutting edge located at a side of the first end;
- a ridge portion located in the first part and the second part, connected to the cutting edge and helically extending from the cutting edge toward the second end;
- and
- a flute located along the cutting edge and the ridge portion, and comprising:
- a first flute located at the first part and having a first helix angle;
- a second flute located at the second part and having a second helix angle, and
- a third flute located at the third part and having a third helix angle, wherein
- the second helix angle is smaller than the first helix angle, and
- the third helix angle at the first end portion is equal to the first helix angle, and the third helix angle at the second end portion is equal to the second helix angle.
A rotary tool, comprising:
- a body having a rotation axis and extending from a first end to a second end, the body comprising:
- a first part including the first end;
- a second part located closer to the second end than the first part and having a larger outside diameter than the first part;
- a cutting edge located at a side of the first end;
- a ridge portion located in the first part and the second part, connected to the cutting edge and helically extending from the cutting edge toward the second end;
- and
- a flute located along the cutting edge and the ridge portion, and comprising:
- a first flute located at the first part, having a first helix angle and comprising a projecting portion extending from a side of the first end to a side of the second end;
- and
- a second flute located at the second part and having a second helix angle, wherein
- an end portion on the second end side of the projecting portion is located on the ridge portion, and
- a portion of the projecting portion that intersects the ridge portion is at a rear-most part of the projecting portion.
Dependencies are inferred from the claim text.