Title:
ROTARY CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2021/075216
Kind Code:
A1
Abstract:
A rotary cutting tool satisfying θ1+θ2+θ3＝360°, wherein two or more of θ1, θ2, and θ3 are 100° to 115° inclusive or 125° to 140° inclusive. The rotary cutting tool is provided with: a cemented carbide guide pad that is located at a position symmetrical to at least one of outer peripheral cutting edges with respect to a rotation axis and that has the same rotation diameter as the outer peripheral cutting edge; and an intermediate shaft portion that is located at a distance from the guide pad in a rotation axis direction and that has a diameter smaller than a rotation diameter D1 of the outer peripheral cutting edge. The difference between the rotation diameter D1 of the outer peripheral cutting edge and the rotation diameter of the intermediate shaft portion is 0.005 mm to 0.008 mm inclusive.
Inventors:
INOUE HARUO (JP)
Application Number:
PCT/JP2020/035735
Publication Date:
April 22, 2021
Filing Date:
September 23, 2020
Export Citation:
Assignee:
ALMT CORP (JP)
International Classes:
B23D77/02
Domestic Patent References:
| WO2019044791A1 | 2019-03-07 |
Foreign References:
| JP2001524882A | 2001-12-04 | |||
| JPH0737531U | 1995-07-11 | |||
| JP3171791U | 2011-11-17 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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