GB1432546A - Twist drills - Google Patents

Twist drills

Info

Publication number
GB1432546A
GB1432546A GB3432572A GB3432572A GB1432546A GB 1432546 A GB1432546 A GB 1432546A GB 3432572 A GB3432572 A GB 3432572A GB 3432572 A GB3432572 A GB 3432572A GB 1432546 A GB1432546 A GB 1432546A
Authority
GB
United Kingdom
Prior art keywords
lands
land
twist drills
relieved
july
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
GB3432572A
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.)
Osborn Mushet Tools Ltd
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
Priority to GB3432572A priority Critical patent/GB1432546A/en
Priority to CA176,008A priority patent/CA986338A/en
Priority to ZA734644A priority patent/ZA734644B/en
Priority to IN1631/CAL/1973A priority patent/IN138434B/en
Priority to AU58015/73A priority patent/AU470924B2/en
Priority to IL42761A priority patent/IL42761A/en
Priority to AT628273A priority patent/AT324072B/en
Priority to SE7309992A priority patent/SE396027B/en
Priority to DE19732336886 priority patent/DE2336886A1/en
Priority to FR7326482A priority patent/FR2193673B1/fr
Priority to JP48082626A priority patent/JPS49124690A/ja
Priority to DD172404A priority patent/DD108226A5/xx
Priority to NL7310188A priority patent/NL7310188A/xx
Priority to CH1064173A priority patent/CH558696A/en
Priority to BE133714A priority patent/BE802619A/en
Priority to ES417523A priority patent/ES417523A1/en
Priority to IT26902/73A priority patent/IT991331B/en
Priority to CS7300005225A priority patent/CS181722B2/en
Priority to US05/580,769 priority patent/US3977807A/en
Publication of GB1432546A publication Critical patent/GB1432546A/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
    • B23B2251/18—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)

Abstract

1432546 Twist drills OSBORN-MUSHET TOOLS Ltd 5 July 1973 [21 July 1972] 34325/72 Heading B3C A twist drill comprises first and second lands 12, 14, Figs. 2, 4, lands 12 being either relieved by chamfering up to point 20, which is further away from the chisel edge 22 than the point 24 on lands 14, or alternatively are relieved so that the diameter at the end of lands 12 is less than that of lands 14, Fig. 8, so that each second land 14 is radially proud of its associated first land 12. The roots of the drill flutes (10), Fig. 6 (not shown), are formed, so as to fracture the swarf. In a further modification a flute (28), Fig. 9 (not shown), is provided in front of each second land. There may be two or more second lands to each first land.
GB3432572A 1972-07-21 1972-07-21 Twist drills Expired GB1432546A (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
GB3432572A GB1432546A (en) 1972-07-21 1972-07-21 Twist drills
CA176,008A CA986338A (en) 1972-07-21 1973-07-09 Twist drills
ZA734644A ZA734644B (en) 1972-07-21 1973-07-10 An improvement in or relating to twist drills
IN1631/CAL/1973A IN138434B (en) 1972-07-21 1973-07-11
AU58015/73A AU470924B2 (en) 1972-07-21 1973-07-12 An improvements in or relating to twist drills
IL42761A IL42761A (en) 1972-07-21 1973-07-17 Twist drill and method for making it
AT628273A AT324072B (en) 1972-07-21 1973-07-17 WENDELBOHREB
SE7309992A SE396027B (en) 1972-07-21 1973-07-17 SPIRAL DRILL
DE19732336886 DE2336886A1 (en) 1972-07-21 1973-07-19 TWIST DRILLS
FR7326482A FR2193673B1 (en) 1972-07-21 1973-07-19
JP48082626A JPS49124690A (en) 1972-07-21 1973-07-20
DD172404A DD108226A5 (en) 1972-07-21 1973-07-20
NL7310188A NL7310188A (en) 1972-07-21 1973-07-20
CH1064173A CH558696A (en) 1972-07-21 1973-07-20 CONVERSION DRILLS AND METHOD OF MANUFACTURING THEREOF.
BE133714A BE802619A (en) 1972-07-21 1973-07-20 IMPROVEMENT IN HELICOIDAL BITS
ES417523A ES417523A1 (en) 1972-07-21 1973-07-20 Twist drills
IT26902/73A IT991331B (en) 1972-07-21 1973-07-20 HELICAL TOOL PARTICULARLY PERFECTED FOR DRILLS
CS7300005225A CS181722B2 (en) 1972-07-21 1973-07-26 Twist drill
US05/580,769 US3977807A (en) 1972-07-21 1975-05-27 Twist drills

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
GB1432546A true GB1432546A (en) 1976-04-22

Family

ID=10364237

Family Applications (1)

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

Country Status (18)

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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140116U (en) * 1983-03-07 1984-09-19 富士精工株式会社 Twist drill with guide part
US4756650A (en) * 1986-11-26 1988-07-12 Kabushiki Kaisha Kobe Seiko Sho Twist drill
US6132149A (en) * 1996-03-26 2000-10-17 Dormer Tools (Sheffield) Limited Twist drills
GB2393681A (en) * 2002-10-03 2004-04-07 Black & Decker Inc Masonry drilling tool
JP2006095662A (en) * 2004-09-30 2006-04-13 Omi Kogyo Co Ltd Burnishing boring tool
JP2013166232A (en) * 2012-01-16 2013-08-29 Hitachi Tool Engineering Ltd Drill

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923925B2 (en) * 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 Drill reamer
JPS52160183U (en) * 1976-05-28 1977-12-05
JPS541102Y2 (en) * 1976-06-10 1979-01-19
DE3325149A1 (en) * 1983-07-12 1985-01-24 Gühring, Gottlieb, 7470 Albstadt Two-lipped twist drill as a combined centring, drilling and boring tool
JPS61249209A (en) * 1985-12-23 1986-11-06 Toyoda Gosei Co Ltd Reamer
CH670968A5 (en) * 1986-11-25 1989-07-31 Sphinxwerke Mueller Ag
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 (en) * 1989-01-10 1995-07-26 愛三工業株式会社 High feed burnishing drill
DE102009039170B4 (en) 2009-08-27 2022-01-20 Kennametal Inc. drilling tool
JP2017202541A (en) * 2016-05-11 2017-11-16 有限会社栄進機工 Drill reamer

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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140116U (en) * 1983-03-07 1984-09-19 富士精工株式会社 Twist drill with guide part
JPS6128654Y2 (en) * 1983-03-07 1986-08-25
US4756650A (en) * 1986-11-26 1988-07-12 Kabushiki Kaisha Kobe Seiko Sho Twist drill
US6132149A (en) * 1996-03-26 2000-10-17 Dormer Tools (Sheffield) Limited Twist drills
GB2393681A (en) * 2002-10-03 2004-04-07 Black & Decker Inc Masonry drilling tool
US7137461B2 (en) 2002-10-03 2006-11-21 Black & Decker, Inc. Masonry drilling tool
JP2006095662A (en) * 2004-09-30 2006-04-13 Omi Kogyo Co Ltd Burnishing boring tool
JP2013166232A (en) * 2012-01-16 2013-08-29 Hitachi Tool Engineering Ltd Drill

Also Published As

Publication number Publication date
NL7310188A (en) 1974-01-23
DD108226A5 (en) 1974-09-12
IN138434B (en) 1976-01-31
DE2336886A1 (en) 1974-01-31
AT324072B (en) 1975-08-11
AU470924B2 (en) 1976-04-01
SE396027B (en) 1977-09-05
AU5801573A (en) 1975-01-16
CA986338A (en) 1976-03-30
FR2193673B1 (en) 1977-08-12
FR2193673A1 (en) 1974-02-22
IT991331B (en) 1975-07-30
ZA734644B (en) 1974-06-26
ES417523A1 (en) 1976-03-01
CS181722B2 (en) 1978-03-31
CH558696A (en) 1975-02-14
IL42761A (en) 1977-05-31
JPS49124690A (en) 1974-11-28
BE802619A (en) 1973-11-16
IL42761A0 (en) 1973-10-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee