JPS56107815A - Straight drill - Google Patents

Straight drill

Info

Publication number
JPS56107815A
JPS56107815A JP967880A JP967880A JPS56107815A JP S56107815 A JPS56107815 A JP S56107815A JP 967880 A JP967880 A JP 967880A JP 967880 A JP967880 A JP 967880A JP S56107815 A JPS56107815 A JP S56107815A
Authority
JP
Japan
Prior art keywords
cutting
tip
drill
straight
hard substance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP967880A
Other languages
Japanese (ja)
Inventor
Takayuki Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
G N TOOL KK
Original Assignee
G N TOOL KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by G N TOOL KK filed Critical G N TOOL KK
Priority to JP967880A priority Critical patent/JPS56107815A/en
Publication of JPS56107815A publication Critical patent/JPS56107815A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/009—Stepped drills

Abstract

PURPOSE:To heighten wear resistance and cutting efficiency, by embedding and fixing a very hard substance such as cubic boron nitride (CBN) and sintered polycrystalline diamond in a part of the cutting edge of a drill. CONSTITUTION:A straight drill 1 has a shank 2 and a cutting part 3 extending therefrom to the tip. A cutting edge 4 is provided on the tip of the cutting part 3. Two straight cutting edges 5 are provided on the peripheral surface of the cutting part 3 so that the straight cutting edges 5 extend to the tip of the part 3. A very hard substance 8, which is higher in hardness than a very hard alloy from which the cutting part 3 is made, is embedded and fixed in the cutting edge 4 on the tip and in a step 6 so that the outside surface of the very hard substance 8 is exposed. Since cutting is performed by the very hard substance 8 in the main, the lifetime of the drill 1 is long.
JP967880A 1980-01-29 1980-01-29 Straight drill Pending JPS56107815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP967880A JPS56107815A (en) 1980-01-29 1980-01-29 Straight drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP967880A JPS56107815A (en) 1980-01-29 1980-01-29 Straight drill

Publications (1)

Publication Number Publication Date
JPS56107815A true JPS56107815A (en) 1981-08-27

Family

ID=11726857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP967880A Pending JPS56107815A (en) 1980-01-29 1980-01-29 Straight drill

Country Status (1)

Country Link
JP (1) JPS56107815A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975237A (en) * 1982-10-22 1984-04-27 Iwatsu Electric Co Ltd Electrophotographic copying machine with variable power device
JPS5990566U (en) * 1982-12-07 1984-06-19 ジ−エヌツ−ル株式会社 Spherical cutter
JPS6135710U (en) * 1984-08-07 1986-03-05 株式会社 エフエスケ− rotary cutting tool
CN107859704A (en) * 2016-09-21 2018-03-30 保时捷股份公司 Inner ventilation type brake disc
US20210339322A1 (en) * 2020-04-30 2021-11-04 The Boeing Company Tools and Methods for Forming Aligned Holes From Near Full-Sized Holes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975237A (en) * 1982-10-22 1984-04-27 Iwatsu Electric Co Ltd Electrophotographic copying machine with variable power device
JPS5990566U (en) * 1982-12-07 1984-06-19 ジ−エヌツ−ル株式会社 Spherical cutter
JPS6317608Y2 (en) * 1982-12-07 1988-05-18
JPS6135710U (en) * 1984-08-07 1986-03-05 株式会社 エフエスケ− rotary cutting tool
CN107859704A (en) * 2016-09-21 2018-03-30 保时捷股份公司 Inner ventilation type brake disc
US20210339322A1 (en) * 2020-04-30 2021-11-04 The Boeing Company Tools and Methods for Forming Aligned Holes From Near Full-Sized Holes
US11260459B2 (en) * 2020-04-30 2022-03-01 The Boeing Company Tools and methods for forming aligned holes from near full-sized holes

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