GB608745A - Improvements in or relating to a drill - Google Patents

Improvements in or relating to a drill

Info

Publication number
GB608745A
GB608745A GB1598946A GB1598946A GB608745A GB 608745 A GB608745 A GB 608745A GB 1598946 A GB1598946 A GB 1598946A GB 1598946 A GB1598946 A GB 1598946A GB 608745 A GB608745 A GB 608745A
Authority
GB
United Kingdom
Prior art keywords
drill
black
facets
land
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
GB1598946A
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
LILIAN VIOLA BLACK
Original Assignee
FRANKLIN GREGERY GEPFERT
JAY THOMAS BLACK
LILIAN 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 US551842A priority Critical patent/US2404049A/en
Application filed by FRANKLIN GREGERY GEPFERT, JAY THOMAS BLACK, LILIAN VIOLA BLACK filed Critical FRANKLIN GREGERY GEPFERT
Priority to GB1598946A priority patent/GB608745A/en
Publication of GB608745A publication Critical patent/GB608745A/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

608,745. Drilis. STEVENS, A. H. (Black, L. V., Black, J. T., and Gepfert, F. G., [Representatives of Black, L. G.]). May 27, 1946, No. 15989. [Class 83 (iii)] A drill for perforating hard materials comprises a smooth round shank from which extends a body portion having spiral flutes 11 composed of a concave surface portion 13 and a convex surface portion 17 a first convex portion and a third adjacent concave portion forming a helical land 12. The cutting end of the drill is formed by three facets 14 ground at an angle of 40 degrees to the longitudinal axis of the drill, the edges of the facets extending from a point 18 to points 16 slightly to the rear of the lower end of each, land. The drill may have more than three flutes. Specification 608,747 is referred to.
GB1598946A 1944-08-30 1946-05-27 Improvements in or relating to a drill Expired GB608745A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US551842A US2404049A (en) 1944-08-30 1944-08-30 Drill
GB1598946A GB608745A (en) 1946-05-27 1946-05-27 Improvements in or relating to a drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1598946A GB608745A (en) 1946-05-27 1946-05-27 Improvements in or relating to a drill

Publications (1)

Publication Number Publication Date
GB608745A true GB608745A (en) 1948-09-20

Family

ID=10069198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1598946A Expired GB608745A (en) 1944-08-30 1946-05-27 Improvements in or relating to a drill

Country Status (1)

Country Link
GB (1) GB608745A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5390291U (en) * 1976-12-24 1978-07-24
US4456411A (en) * 1981-08-10 1984-06-26 Burke Clement Twist drill
US4712948A (en) * 1984-03-31 1987-12-15 Morio Kidani Ball end mill cutter
US4722644A (en) * 1985-03-08 1988-02-02 Hawera Prazisionswerkzeuge Gmbh Multi-lip drill
US5323823A (en) * 1992-12-11 1994-06-28 Roto Zip Tool Corporation Wood router bit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5390291U (en) * 1976-12-24 1978-07-24
US4456411A (en) * 1981-08-10 1984-06-26 Burke Clement Twist drill
US4712948A (en) * 1984-03-31 1987-12-15 Morio Kidani Ball end mill cutter
US4722644A (en) * 1985-03-08 1988-02-02 Hawera Prazisionswerkzeuge Gmbh Multi-lip drill
US5323823A (en) * 1992-12-11 1994-06-28 Roto Zip Tool Corporation Wood router bit

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