GB380391A - Improvements in or relating to screw taps - Google Patents

Improvements in or relating to screw taps

Info

Publication number
GB380391A
GB380391A GB11141/32A GB1114132A GB380391A GB 380391 A GB380391 A GB 380391A GB 11141/32 A GB11141/32 A GB 11141/32A GB 1114132 A GB1114132 A GB 1114132A GB 380391 A GB380391 A GB 380391A
Authority
GB
United Kingdom
Prior art keywords
tapered
cutting
april
class
iii
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
GB11141/32A
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
Publication of GB380391A publication Critical patent/GB380391A/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
    • 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
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
    • B23G1/18—Machines with one working spindle
    • 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
    • B23G2200/32—Tools having a decreasing diameter in the direction of the shank from the tip

Landscapes

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

Abstract

380,391. Taps. BALZ, 0., 20, Schelztor. strasse, Esslingenon - Neckar, Germany. April 19, 1932, No. 11141. Convention date, April 20, 1931. Addition to 291,356, [Class 83 (iii), Metals, Cutting]. [Class 83 (iii).] The feed portion of the tap described in the parent Specification is conically tapered, decreasing in thread diameter towards the shank. The cutting and feeding portions a, b, respectively, merge into the correct external diameter to be cut about midway of the tap, the thread being tapered conically fom the front end throughout its whole length whilst the cutting portion is oppositely externnally tapered only.
GB11141/32A 1931-04-20 1932-04-19 Improvements in or relating to screw taps Expired GB380391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE380391X 1931-04-20

Publications (1)

Publication Number Publication Date
GB380391A true GB380391A (en) 1932-09-15

Family

ID=6346986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11141/32A Expired GB380391A (en) 1931-04-20 1932-04-19 Improvements in or relating to screw taps

Country Status (2)

Country Link
FR (2) FR654532A (en)
GB (1) GB380391A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627408A1 (en) * 1988-02-23 1989-08-25 Sadex Outillages Tap for threading hole - has height of teeth progressively reduced as they taper away from free end NoAbstract
DE10326073B4 (en) * 2002-06-13 2009-04-09 Kennametal Inc. thread milling
CN109108400A (en) * 2018-09-06 2019-01-01 基准精密工业（惠州）有限公司 Screw tap

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651678A (en) * 1968-11-06 1972-03-28 Reed Rolled Thread Die Co Truncated through feeding thread rolling die

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627408A1 (en) * 1988-02-23 1989-08-25 Sadex Outillages Tap for threading hole - has height of teeth progressively reduced as they taper away from free end NoAbstract
DE10326073B4 (en) * 2002-06-13 2009-04-09 Kennametal Inc. thread milling
US7959381B2 (en) 2002-06-13 2011-06-14 Kennametal Inc. Thread milling tool
CN109108400A (en) * 2018-09-06 2019-01-01 基准精密工业（惠州）有限公司 Screw tap
CN109108400B (en) * 2018-09-06 2023-08-15 基准精密工业（惠州）有限公司 Screw tap

Also Published As

Publication number Publication date
FR41593E (en) 1933-02-07
FR654532A (en) 1929-04-05

Similar Documents

Publication Publication Date Title
GB380391A (en) Improvements in or relating to screw taps
GB305950A (en) Improvements in and connected with screw thread cutters
GB570099A (en) A combined twist drill and countersinking or counterboring attachment
GB487153A (en) Improvements in or relating to screws and screw drivers for use therewith
GB617321A (en) Self tapping screw
GB555009A (en) Improvements in tools for cutting the protective covering of conductor cables
GB486253A (en) Improvements in or relating to drill-carrying dental instrument
GB465444A (en) Improvements in or relating to door handles and the like fittings
GB476416A (en) Improvements in and relating to chucks for rotary spindle machine tools
GB777283A (en) Improvements in expanding tool holders for boring bars and the like
GB307786A (en)
GB435743A (en) Improvements in lathe or like collets
GB536546A (en) Improvements in or relating to pushers for feeding bar stock in screw and like machines
US2353009A (en) Machine center
GB629458A (en) Hand taps for cutting screw threads
GB584682A (en) Improvements in taps for cutting screw threads
GB204953A (en) Improvements in and relating to turning tools
GB428675A (en) Improvements in or relating to hand tools for boring, sawing and rasping wood and like materials
GB382906A (en) Improvements in or relating to wood-boring tools
GB555111A (en) Improvements in milling cutters, reamers and the like
GB169435A (en) Tool holders for lathes and like metal cutting machines
GB566095A (en) Improvements in and relating to feed collets
GB943897A (en) Improvements in screw thread taps
GB586381A (en) Improvements in meat mincing machines
GB565418A (en) Device for inserting wire coils in tapped holes