DRILL - SUMITOMO ELECTRIC HARDMETAL CORP

Title:

DRILL

Document Type and Number:

WIPO Patent Application WO/2020/031259

Kind Code:

A1

Abstract:

This drill is provided with a body. The body includes: a first cutting edge; and a second cutting edge that is spaced apart at the rear end side with respect to the first cutting edge and that is formed at a recess part traversing the outer peripheral part of the body. In a side view of the body from a first direction in which the distance between the center axis of the body and a first outer end of the first cutting edge appears to be the greatest, a second outer end of the second cutting edge is located at the center axis side relative to the first outer end of the first cutting edge.

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Inventors:

MISUMI SHUHEI (JP)
YOSHIDA MINORU (JP)
SATO YOSHIJI (JP)

Application Number:

PCT/JP2018/029595

Publication Date:

February 13, 2020

Filing Date:

August 07, 2018

Export Citation:

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Assignee:

SUMITOMO ELECTRIC HARDMETAL CORP (JP)

International Classes:

B23B51/00; B23B51/02; B23B51/08

Domestic Patent References:

WO2013099841A1

2013-07-04

Foreign References:

JPS5511897U	1980-01-25
JP2015511543A	2015-04-20
JP2010240835A	2010-10-28
CN104772505A	2015-07-15
JP2009172708A	2009-08-06

Other References: