FR764041A - Twist Drill Improvements - Google Patents

Twist Drill Improvements

Info

Publication number
FR764041A
FR764041A FR764041DA FR764041A FR 764041 A FR764041 A FR 764041A FR 764041D A FR764041D A FR 764041DA FR 764041 A FR764041 A FR 764041A
Authority
FR
France
Prior art keywords
twist drill
twist
drill
drill improvements
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.)
Expired
Application number
Other languages
French (fr)
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.)
CIE DE CONSTRUCTION DE FORETS
Original Assignee
CIE DE CONSTRUCTION DE FORETS
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 CIE DE CONSTRUCTION DE FORETS filed Critical CIE DE CONSTRUCTION DE FORETS
Application granted granted Critical
Publication of FR764041A publication Critical patent/FR764041A/en
Expired 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
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/24—Overall form of drilling tools
    • B23B2251/241—Cross sections of the diameter of the drill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/44—Margins, i.e. the narrow portion of the land which is not cut away to provide clearance on the circumferential surface
    • B23B2251/443—Double margin drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/56—Guiding pads

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR764041D 1933-11-18 1933-11-18 Twist Drill Improvements Expired FR764041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR764041T 1933-11-18

Publications (1)

Publication Number Publication Date
FR764041A true FR764041A (en) 1934-05-14

Family

ID=9181930

Family Applications (1)

Application Number Title Priority Date Filing Date
FR764041D Expired FR764041A (en) 1933-11-18 1933-11-18 Twist Drill Improvements

Country Status (1)

Country Link
FR (1) FR764041A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977807A (en) * 1972-07-21 1976-08-31 Osborn-Mushet Tools Limited Twist drills
DE3325149A1 (en) * 1983-07-12 1985-01-24 Gühring, Gottlieb, 7470 Albstadt Two-lipped twist drill as a combined centring, drilling and boring tool
WO1988003849A1 (en) * 1986-11-25 1988-06-02 Sphinxwerke Müller Ag Twist drill
DE3820485C1 (en) * 1988-06-16 1989-08-24 Helmut Dipl.-Ing. 1000 Berlin De Krauss Helical flutes in drill bit - incorporates straight sloping sides and circular rounded floor portion
US5486075A (en) * 1993-07-27 1996-01-23 Mitsubishi Materials Corporation Boring tool
JP2012176453A (en) * 2011-02-25 2012-09-13 Honda Motor Co Ltd Drill reamer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977807A (en) * 1972-07-21 1976-08-31 Osborn-Mushet Tools Limited Twist drills
DE3325149A1 (en) * 1983-07-12 1985-01-24 Gühring, Gottlieb, 7470 Albstadt Two-lipped twist drill as a combined centring, drilling and boring tool
WO1988003849A1 (en) * 1986-11-25 1988-06-02 Sphinxwerke Müller Ag Twist drill
US4913603A (en) * 1986-11-25 1990-04-03 Sphinzwerke Muller AG Spiral drill
DE3820485C1 (en) * 1988-06-16 1989-08-24 Helmut Dipl.-Ing. 1000 Berlin De Krauss Helical flutes in drill bit - incorporates straight sloping sides and circular rounded floor portion
US5486075A (en) * 1993-07-27 1996-01-23 Mitsubishi Materials Corporation Boring tool
JP2012176453A (en) * 2011-02-25 2012-09-13 Honda Motor Co Ltd Drill reamer

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