FR331552A - Half-round helical drill bit - Google Patents

Half-round helical drill bit

Info

Publication number
FR331552A
FR331552A FR331552DA FR331552A FR 331552 A FR331552 A FR 331552A FR 331552D A FR331552D A FR 331552DA FR 331552 A FR331552 A FR 331552A
Authority
FR
France
Prior art keywords
drill bit
helical drill
round helical
round
bit
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
Jean Charollais
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR331552A publication Critical patent/FR331552A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR331552D 1903-04-28 1903-04-28 Half-round helical drill bit Expired FR331552A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR331552T 1903-04-28

Publications (1)

Publication Number Publication Date
FR331552A true FR331552A (en) 1903-09-19

Family

ID=1381258

Family Applications (1)

Application Number Title Priority Date Filing Date
FR331552D Expired FR331552A (en) 1903-04-28 1903-04-28 Half-round helical drill bit

Country Status (1)

Country Link
FR (1) FR331552A (en)

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