FR725505A - Further training in drills - Google Patents

Further training in drills

Info

Publication number
FR725505A
FR725505A FR725505DA FR725505A FR 725505 A FR725505 A FR 725505A FR 725505D A FR725505D A FR 725505DA FR 725505 A FR725505 A FR 725505A
Authority
FR
France
Prior art keywords
drills
further training
training
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)
Inventor
Eugene Fouquet
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 filed Critical
Application granted granted Critical
Publication of FR725505A publication Critical patent/FR725505A/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
    • B23B51/009—Stepped drills
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR725505D 1931-10-31 1931-10-31 Further training in drills Expired FR725505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR725505T 1931-10-31

Publications (1)

Publication Number Publication Date
FR725505A true FR725505A (en) 1932-05-13

Family

ID=9110114

Family Applications (1)

Application Number Title Priority Date Filing Date
FR725505D Expired FR725505A (en) 1931-10-31 1931-10-31 Further training in drills

Country Status (1)

Country Link
FR (1) FR725505A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758222A (en) * 1971-12-30 1973-09-11 H Oakes Drill bit
US4582458A (en) * 1984-08-09 1986-04-15 American Saw & Mfg. Company Stepped drill construction
US5915893A (en) * 1996-06-05 1999-06-29 Kabushiki Kaisha Miyanaga Multistage bit and stopper
GB2405820A (en) * 2003-09-10 2005-03-16 Bradford Tool Group Stepped drill bit with spiral fluting
US8029215B2 (en) 2007-01-05 2011-10-04 Greenlee Textron Inc. Spiral drill bit and method of forming same
EP2934802B1 (en) 2012-12-20 2016-07-13 Walter AG Twist drill
US20170129022A1 (en) * 2015-11-10 2017-05-11 Irwin Industrial Tool Company Step drill bit with variable helical flute

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758222A (en) * 1971-12-30 1973-09-11 H Oakes Drill bit
US4582458A (en) * 1984-08-09 1986-04-15 American Saw & Mfg. Company Stepped drill construction
US5915893A (en) * 1996-06-05 1999-06-29 Kabushiki Kaisha Miyanaga Multistage bit and stopper
GB2405820A (en) * 2003-09-10 2005-03-16 Bradford Tool Group Stepped drill bit with spiral fluting
US8029215B2 (en) 2007-01-05 2011-10-04 Greenlee Textron Inc. Spiral drill bit and method of forming same
EP2934802B1 (en) 2012-12-20 2016-07-13 Walter AG Twist drill
EP2934802B2 (en) † 2012-12-20 2019-12-11 Walter AG Twist drill
US20170129022A1 (en) * 2015-11-10 2017-05-11 Irwin Industrial Tool Company Step drill bit with variable helical flute
US10058929B2 (en) * 2015-11-10 2018-08-28 Irwin Industrial Tool Company Step drill bit with variable helical flute

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