ZA753040B - An improvement in or relating to twist drills - Google Patents

An improvement in or relating to twist drills

Info

Publication number
ZA753040B
ZA753040B ZA00753040A ZA753040A ZA753040B ZA 753040 B ZA753040 B ZA 753040B ZA 00753040 A ZA00753040 A ZA 00753040A ZA 753040 A ZA753040 A ZA 753040A ZA 753040 B ZA753040 B ZA 753040B
Authority
ZA
South Africa
Prior art keywords
relating
improvement
twist drills
drills
twist
Prior art date
Application number
ZA00753040A
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 ZA753040B publication Critical patent/ZA753040B/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
    • B23B2251/04—Angles, e.g. cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/04—Angles, e.g. cutting angles
    • B23B2251/043—Helix angles
    • 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
    • B23B2251/40—Flutes, i.e. chip conveying grooves
    • B23B2251/406—Flutes, i.e. chip conveying grooves of special form not otherwise provided for

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
ZA00753040A 1974-05-17 1975-05-12 An improvement in or relating to twist drills ZA753040B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22130/74A GB1509912A (en) 1974-05-17 1974-05-17 Twist drills

Publications (1)

Publication Number Publication Date
ZA753040B true ZA753040B (en) 1976-04-28

Family

ID=10174379

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00753040A ZA753040B (en) 1974-05-17 1975-05-12 An improvement in or relating to twist drills

Country Status (15)

Country Link
JP (1) JPS50156790A (de)
AU (1) AU500271B2 (de)
BR (1) BR7503011A (de)
CA (1) CA1022775A (de)
DE (1) DE2521938C3 (de)
ES (1) ES437919A1 (de)
FR (1) FR2270978A1 (de)
GB (1) GB1509912A (de)
IE (1) IE41050B1 (de)
IL (1) IL47302A (de)
IN (1) IN144887B (de)
IT (1) IT1038197B (de)
NL (1) NL7505612A (de)
SE (1) SE7505581L (de)
ZA (1) ZA753040B (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5331286A (en) * 1976-09-02 1978-03-24 Riyousuke Hosoi Ball end mill
SE8300910L (sv) * 1983-02-18 1984-08-19 Santrade Ltd Sammansatt kropp bestaende av ett substrat belagt med hart, slitstarkt ytskikt
GB2184046B (en) * 1985-12-13 1990-01-24 Skf & Dormer Tools Twist drill
JPS634211U (de) * 1986-06-23 1988-01-12
DE3891420T1 (de) * 1988-10-21 1990-11-22 Aleksej Vladimirovic Cubkov Spiralbohrer
EP2366478B1 (de) * 2001-07-10 2020-04-15 Mitsubishi Materials Corporation Bohrer
JP2006055965A (ja) * 2004-08-23 2006-03-02 Osg Corp 低加工硬化超硬ドリル
JP5301647B2 (ja) * 2009-02-20 2013-09-25 オーエスジー株式会社 ドリル付きタップ、およびめねじ加工方法

Also Published As

Publication number Publication date
IL47302A (en) 1978-03-10
BR7503011A (pt) 1976-04-20
IT1038197B (it) 1979-11-20
IN144887B (de) 1978-07-22
DE2521938A1 (de) 1975-11-27
DE2521938B2 (de) 1979-07-05
AU500271B2 (en) 1979-05-17
DE2521938C3 (de) 1980-03-06
ES437919A1 (es) 1977-01-01
CA1022775A (en) 1977-12-20
IE41050B1 (en) 1979-10-10
IL47302A0 (en) 1975-07-28
IE41050L (en) 1975-11-17
SE7505581L (sv) 1975-11-18
JPS50156790A (de) 1975-12-18
AU8125675A (en) 1976-11-25
FR2270978A1 (de) 1975-12-12
NL7505612A (nl) 1975-11-19
GB1509912A (en) 1978-05-04

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