ZA734644B - An improvement in or relating to twist drills - Google Patents

An improvement in or relating to twist drills

Info

Publication number
ZA734644B
ZA734644B ZA734644A ZA734644A ZA734644B ZA 734644 B ZA734644 B ZA 734644B ZA 734644 A ZA734644 A ZA 734644A ZA 734644 A ZA734644 A ZA 734644A ZA 734644 B ZA734644 B ZA 734644B
Authority
ZA
South Africa
Prior art keywords
relating
improvement
twist drills
drills
twist
Prior art date
Application number
ZA734644A
Other languages
English (en)
Inventor
K Siddall
Original Assignee
Osborn Mushet Tools Ltd
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 Osborn Mushet Tools Ltd filed Critical Osborn Mushet Tools Ltd
Publication of ZA734644B publication Critical patent/ZA734644B/xx

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
    • B23B2251/18—Configuration of the drill point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/20—Number of cutting edges
    • B23B2251/204—Four cutting edges
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
ZA734644A 1972-07-21 1973-07-10 An improvement in or relating to twist drills ZA734644B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3432572A GB1432546A (en) 1972-07-21 1972-07-21 Twist drills

Publications (1)

Publication Number Publication Date
ZA734644B true ZA734644B (en) 1974-06-26

Family

ID=10364237

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA734644A ZA734644B (en) 1972-07-21 1973-07-10 An improvement in or relating to twist drills

Country Status (18)

Country Link
JP (1) JPS49124690A (xx)
AT (1) AT324072B (xx)
AU (1) AU470924B2 (xx)
BE (1) BE802619A (xx)
CA (1) CA986338A (xx)
CH (1) CH558696A (xx)
CS (1) CS181722B2 (xx)
DD (1) DD108226A5 (xx)
DE (1) DE2336886A1 (xx)
ES (1) ES417523A1 (xx)
FR (1) FR2193673B1 (xx)
GB (1) GB1432546A (xx)
IL (1) IL42761A (xx)
IN (1) IN138434B (xx)
IT (1) IT991331B (xx)
NL (1) NL7310188A (xx)
SE (1) SE396027B (xx)
ZA (1) ZA734644B (xx)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923925B2 (ja) * 1975-12-29 1984-06-06 カブシキガイシヤ ササクラキカイセイサクシヨ ドリルリ−マ−フクゴウセンコウグ
JPS52160183U (xx) * 1976-05-28 1977-12-05
JPS541102Y2 (xx) * 1976-06-10 1979-01-19
JPS59140116U (ja) * 1983-03-07 1984-09-19 富士精工株式会社 ガイド部付ツイストドリル
DE3325149A1 (de) * 1983-07-12 1985-01-24 Gühring, Gottlieb, 7470 Albstadt Zweischneidiges wendelbohrwerkzeug als kombiniertes zentrier-, bohr- und aufbohrwerkzeug
JPS61249209A (ja) * 1985-12-23 1986-11-06 Toyoda Gosei Co Ltd リ−マ
CH670968A5 (xx) * 1986-11-25 1989-07-31 Sphinxwerke Mueller Ag
US4756650A (en) * 1986-11-26 1988-07-12 Kabushiki Kaisha Kobe Seiko Sho 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
JPH0731926Y2 (ja) * 1989-01-10 1995-07-26 愛三工業株式会社 高送り用バニシングドリル
GB9606370D0 (en) * 1996-03-26 1996-06-05 Dormer Tools Sheffield Ltd Improvements in or relating to twist drills
GB2393681A (en) 2002-10-03 2004-04-07 Black & Decker Inc Masonry drilling tool
JP2006095662A (ja) * 2004-09-30 2006-04-13 Omi Kogyo Co Ltd バニシング穴あけ工具
DE102009039170B4 (de) 2009-08-27 2022-01-20 Kennametal Inc. Bohrwerkzeug
JP5939001B2 (ja) * 2012-01-16 2016-06-22 三菱日立ツール株式会社 ドリル
JP2017202541A (ja) * 2016-05-11 2017-11-16 有限会社栄進機工 ドリルリーマ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2063753A (en) * 1932-09-27 1936-12-08 Edward J Pohlman Reamer

Also Published As

Publication number Publication date
IL42761A (en) 1977-05-31
FR2193673B1 (xx) 1977-08-12
AU5801573A (en) 1975-01-16
IT991331B (it) 1975-07-30
CS181722B2 (en) 1978-03-31
DD108226A5 (xx) 1974-09-12
SE396027B (sv) 1977-09-05
IL42761A0 (en) 1973-10-25
AU470924B2 (en) 1976-04-01
BE802619A (fr) 1973-11-16
AT324072B (de) 1975-08-11
CH558696A (de) 1975-02-14
JPS49124690A (xx) 1974-11-28
DE2336886A1 (de) 1974-01-31
ES417523A1 (es) 1976-03-01
CA986338A (en) 1976-03-30
FR2193673A1 (xx) 1974-02-22
NL7310188A (xx) 1974-01-23
IN138434B (xx) 1976-01-31
GB1432546A (en) 1976-04-22

Similar Documents

Publication Publication Date Title
ZA731896B (en) Improvements in or relating to ozonisers
IL42761A0 (en) An improvement in or relating to twist drills
ZA721076B (en) Improvements in or relating to welding machines
ZA737736B (en) Improvements in or relating to gearboxes
IL39896A0 (en) Improvements in or relating to hand tools
ZA707036B (en) Improvements in or relating to twist drills
ZA727963B (en) Improvements in or relating to hand tools
HK13076A (en) Improvements in or relating to punching machines
ZA737327B (en) Improvements in or relating to mine brattices
IL47302A0 (en) An improvement in or relating to twist drills
ZA731452B (en) Improvements in or relating to rock-drilling machines
MY7600200A (en) Improvements in or relating to aerators
ZA717635B (en) Improvements in or relating to planting machines
ZA727054B (en) Improvements in or relating to cutters
ZA711549B (en) Improvements in or relating to welding machines
ZA715994B (en) Improvements in or relating to tool retaining means
ZA7277B (en) Improvements in or relating to rock drills
AU480711B2 (en) Improvements in or relating to false twist devices
AU463722B2 (en) Improvements in or relating to welding machines
IE37577B1 (en) Improvements in or relating to ozonisers
ZA702157B (en) Improvements in or relating to shank drills
ZA697390B (en) Improvements in or relating to boring
AU3114371A (en) Improvements in or relating to blasting machines
AU465028B2 (en) Improvements in or relating to tool retaining means
ZA725636B (en) Improvements in drill steels