GB608747A - Improvements in or relating to a drill - Google Patents

Improvements in or relating to a drill

Info

Publication number
GB608747A
GB608747A GB1740346A GB1740346A GB608747A GB 608747 A GB608747 A GB 608747A GB 1740346 A GB1740346 A GB 1740346A GB 1740346 A GB1740346 A GB 1740346A GB 608747 A GB608747 A GB 608747A
Authority
GB
United Kingdom
Prior art keywords
drill
black
concave
fillets
flutes
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
GB1740346A
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.)
FRANKLIN GREGERY GEPFERT
JAY THOMAS BLACK
LILLIAN VIOLA BLACK
Original Assignee
FRANKLIN GREGERY GEPFERT
JAY THOMAS BLACK
LILLIAN VIOLA BLACK
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
Priority to US548150A priority Critical patent/US2404048A/en
Application filed by FRANKLIN GREGERY GEPFERT, JAY THOMAS BLACK, LILLIAN VIOLA BLACK filed Critical FRANKLIN GREGERY GEPFERT
Priority to GB1740346A priority patent/GB608747A/en
Publication of GB608747A publication Critical patent/GB608747A/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
    • B23B2251/04—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
    • B23B2251/18—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
    • B23B2251/202—Three 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

608,747. Drills. STEVENS, A. H. (Black, L. V., Black, J. T., and Gepfert, F. G., Representatives of Black, L. G.]). June 11, 1946, No. 17403. [Class 83 (iii)] A drill for penetrating hardened metals comprises a round shank portion, a body portion of substantially triangular cross-section and a pyramidal end portion. The body portion is composed of a number of helical flutes 11 forming an equal number of helical fillets 12 therebetween which abut the radially extending ridges 15 of the end portion, the facets 14 of which are provided with concave grooves 16 to facilitate the egress of cuttings and form an angle of about 40 degrees with the axis of the drill. The peripheral surfaces of the fillets 12 are concentric with the shank portion, while the flutes 11 are very slightly concave in crosssection due to the convexity of the grinding- wheel on which they are formed. The drill point 18 may be made straight or concave. Specification 557,933 is referred to.
GB1740346A 1944-08-05 1946-06-11 Improvements in or relating to a drill Expired GB608747A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US548150A US2404048A (en) 1944-08-05 1944-08-05 Drill
GB1740346A GB608747A (en) 1946-06-11 1946-06-11 Improvements in or relating to a drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1740346A GB608747A (en) 1946-06-11 1946-06-11 Improvements in or relating to a drill

Publications (1)

Publication Number Publication Date
GB608747A true GB608747A (en) 1948-09-20

Family

ID=10094573

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1740346A Expired GB608747A (en) 1944-08-05 1946-06-11 Improvements in or relating to a drill

Country Status (1)

Country Link
GB (1) GB608747A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7892235B2 (en) 2002-08-08 2011-02-22 Surgibit Ip Holdings Pty Limited Drill bit and method for producing a drill bit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7892235B2 (en) 2002-08-08 2011-02-22 Surgibit Ip Holdings Pty Limited Drill bit and method for producing a drill bit
US8162945B2 (en) 2002-08-08 2012-04-24 Surgibit Ip Holdings Pty Limited Drill bit and method for producing a drill bit
US8172845B2 (en) 2002-08-08 2012-05-08 Surgibit Ip Holdings Pty Limited Drill bit and method for producing a drill bit
US11337709B2 (en) 2002-08-08 2022-05-24 Surgibit Ip Holdings Pty Limited Drill bit and method for producing a drill bit

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