GB943897A - Improvements in screw thread taps - Google Patents

Improvements in screw thread taps

Info

Publication number
GB943897A
GB943897A GB2989359A GB2989359A GB943897A GB 943897 A GB943897 A GB 943897A GB 2989359 A GB2989359 A GB 2989359A GB 2989359 A GB2989359 A GB 2989359A GB 943897 A GB943897 A GB 943897A
Authority
GB
United Kingdom
Prior art keywords
drill
thread
screw thread
flutes
tap
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
GB2989359A
Inventor
George Alfred Richmond
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.)
JOHN HARRIS TOOLS Ltd
Original Assignee
JOHN HARRIS 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 JOHN HARRIS TOOLS Ltd filed Critical JOHN HARRIS TOOLS Ltd
Priority to GB2989359A priority Critical patent/GB943897A/en
Publication of GB943897A publication Critical patent/GB943897A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G7/00—Forming thread by means of tools similar both in form and in manner of use to thread-cutting tools, but without removing any material
    • B23G7/02—Tools for this purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/20—Thread-cutting tools; Die-heads combined with other tools, e.g. drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G2200/00—Details of threading tools
    • B23G2200/14—Multifunctional threading tools
    • B23G2200/143—Tools comprising means for drilling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G2200/00—Details of threading tools
    • B23G2200/14—Multifunctional threading tools
    • B23G2200/146—Tools comprising a tap

Landscapes

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

Abstract

943,897. Drills; forming internal screwthreads. JOHN HARRIS TOOLS Ltd. Aug. 31, 1960 [Sept. 2, 1959], No. 29893/59. Headings B3C and B3V. A rotary tool comprises a portion 1 for forming a thread, the portion being tapered towards a drill portion at the leading end of the tool, the drill having a diameter not greater than that of the adjacent threaded portion and less than that of the root diameter of the full thread portion. The tap swages the thread and is relieved at two, three or more portions 3 around its periphery. The tap may have flutes in alignment with flutes in the drill.
GB2989359A 1959-09-02 1959-09-02 Improvements in screw thread taps Expired GB943897A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2989359A GB943897A (en) 1959-09-02 1959-09-02 Improvements in screw thread taps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2989359A GB943897A (en) 1959-09-02 1959-09-02 Improvements in screw thread taps

Publications (1)

Publication Number Publication Date
GB943897A true GB943897A (en) 1963-12-11

Family

ID=10298895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2989359A Expired GB943897A (en) 1959-09-02 1959-09-02 Improvements in screw thread taps

Country Status (1)

Country Link
GB (1) GB943897A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318182A (en) * 1965-11-03 1967-05-09 Textron Ind Inc Self-thread-forming screw with drill point and method of making same
GB2275632A (en) * 1993-02-11 1994-09-07 Gordon Wall Thread-cutting drill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318182A (en) * 1965-11-03 1967-05-09 Textron Ind Inc Self-thread-forming screw with drill point and method of making same
GB2275632A (en) * 1993-02-11 1994-09-07 Gordon Wall Thread-cutting drill
GB2275632B (en) * 1993-02-11 1995-09-27 Gordon Wall Thread-drill

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