GB287327A - Improvements in or relating to screw taps - Google Patents

Improvements in or relating to screw taps

Info

Publication number
GB287327A
GB287327A GB904327A GB904327A GB287327A GB 287327 A GB287327 A GB 287327A GB 904327 A GB904327 A GB 904327A GB 904327 A GB904327 A GB 904327A GB 287327 A GB287327 A GB 287327A
Authority
GB
United Kingdom
Prior art keywords
tap
screw
cheese
tapped
screwed
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
GB904327A
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
Priority to BE347014D priority Critical patent/BE347014A/xx
Application filed by Individual filed Critical Individual
Priority to GB904327A priority patent/GB287327A/en
Priority to FR645114D priority patent/FR645114A/en
Publication of GB287327A publication Critical patent/GB287327A/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
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
    • B23G5/06—Taps
    • B23G5/062—Taps with a guiding means part

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

287,327. Watt. P. A. April 1, 1927. Taps.-A cheese-headed screw having a head of diameter equal to or slightly less than the root diameter of the tap is screwed into the starting end of a single piece taper or other screw tap to serve as a centring guide in starting the thread. A cheese headed screw 1 of size to form an easy fit in the hole 4 to be tapped, viz. :- <31>/64" for a <33>/64" hole to be tapped by a #" tap is screwed into the starting end of the tap 2. The end of the screw may be formed with a slot 8 to facilitate removal by a screwdriver when the thread is started. The tap may also be used for blind holes in castings &c.
GB904327A 1927-04-01 1927-04-01 Improvements in or relating to screw taps Expired GB287327A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE347014D BE347014A (en) 1927-04-01
GB904327A GB287327A (en) 1927-04-01 1927-04-01 Improvements in or relating to screw taps
FR645114D FR645114A (en) 1927-04-01 1927-12-03 Tap improvements for drilling holes in metals or other materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB904327A GB287327A (en) 1927-04-01 1927-04-01 Improvements in or relating to screw taps

Publications (1)

Publication Number Publication Date
GB287327A true GB287327A (en) 1928-03-22

Family

ID=9864280

Family Applications (1)

Application Number Title Priority Date Filing Date
GB904327A Expired GB287327A (en) 1927-04-01 1927-04-01 Improvements in or relating to screw taps

Country Status (3)

Country Link
BE (1) BE347014A (en)
FR (1) FR645114A (en)
GB (1) GB287327A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011005593A (en) * 2009-06-25 2011-01-13 Mitsubishi Heavy Ind Ltd Tap set, screw hole working device and screw hole working method
US20110135413A1 (en) * 2008-05-30 2011-06-09 Kennametal Inc. Reamer
US8052360B2 (en) * 2007-10-31 2011-11-08 Carl Strom Self-aligning thread tap and method of utilizing the same to tap existing bore holes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762444A (en) * 1987-03-16 1988-08-09 Mena Carl M Screw tap with lubrication and extraction bores

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8052360B2 (en) * 2007-10-31 2011-11-08 Carl Strom Self-aligning thread tap and method of utilizing the same to tap existing bore holes
US20110135413A1 (en) * 2008-05-30 2011-06-09 Kennametal Inc. Reamer
US8708618B2 (en) * 2008-05-30 2014-04-29 Kennametal Inc. Reamer
JP2011005593A (en) * 2009-06-25 2011-01-13 Mitsubishi Heavy Ind Ltd Tap set, screw hole working device and screw hole working method

Also Published As

Publication number Publication date
BE347014A (en)
FR645114A (en) 1927-10-19

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