GB748091A - Improvements in reversible rotary tool holders for screw thread cutting tools - Google Patents

Improvements in reversible rotary tool holders for screw thread cutting tools

Info

Publication number
GB748091A
GB748091A GB18079/53A GB1807953A GB748091A GB 748091 A GB748091 A GB 748091A GB 18079/53 A GB18079/53 A GB 18079/53A GB 1807953 A GB1807953 A GB 1807953A GB 748091 A GB748091 A GB 748091A
Authority
GB
United Kingdom
Prior art keywords
members
tool
races
balls
hole
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
GB18079/53A
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.)
Svenska Precisionsverktyg AB
Original Assignee
Svenska Precisionsverktyg AB
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 Svenska Precisionsverktyg AB filed Critical Svenska Precisionsverktyg AB
Publication of GB748091A publication Critical patent/GB748091A/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
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/44—Equipment or accessories specially designed for machines or devices for thread cutting
    • B23G1/46—Equipment or accessories specially designed for machines or devices for thread cutting for holding the threading tools
    • B23G1/465—Equipment or accessories specially designed for machines or devices for thread cutting for holding the threading tools comprising arrangements for reversing the rotation of the tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S476/00—Friction gear transmission systems or components
    • Y10S476/90—Overload release

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Drilling And Boring (AREA)

Abstract

748,091. Screw-cutting attachments. AKTIEBOLAGET SVENSKA PRECISIONSVERKTYG. June 30, 1953 [July 1, 1952], No. 18079/53. Class 83 (3). A reversible rotary, screw-thread cutting-tool holder comprises a driving member 16 fixed to a shaft 10, and a driven member 58 mounting a chuck 102 for the tool, and force-transmitting members therebetween which include a ball clutch 40 and coupling members 60, 62 for direct or forward drive, and ball members 78 and coupling members 84, 62 for reverse drive. The driven member during both forward and reverse drives is not subjected to any axial pressure from the driving member. The clutch comprises a number of balls 46 pressed by springs 30 to engage part-spherical recesses in a member 38, the spring force being adjustable by screwing a collar 22 relatively to member 16 The recesses are interconnected by shallow grooves 45. Members 60 consist of diametrically-opposite projections on the inner wall of member 38 to abut roller members 62 carried by the driven member or spindle 58. Members 84 consist of diametrically-opposite projections on the inner wall of a sleeve 70 having races 74, 76 thereon, the latter race being adjustable axially relatively to race 74. The balls 78 are carried by a rotationally-stationary part 80 and engage the races 74, 76 and races 82 in the wall of member 16, whereby forward rotation of the member 16 causes reverse rotation of sleeve 70. In cutting a thread, e.g. tapping a hole, the holder is moved down with the tool until said tool abuts the bottom of the hole. The clutch then audibly slips, the balls 46 running in the groove 45, and the operator raises shaft 10 and member 16, to cause disengagement of members 60, 62 and engagement of members 84, 62. The tap is thus drawn out of the hole and once out, a spring 100 restores the parts for forward drive. The collar 22 and member 16 may have an indicating mark and scale for varying the spring pressure. The part 80 is held from rotation by an arm 81.
GB18079/53A 1952-07-01 1953-06-30 Improvements in reversible rotary tool holders for screw thread cutting tools Expired GB748091A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE327816X 1952-07-01

Publications (1)

Publication Number Publication Date
GB748091A true GB748091A (en) 1956-04-18

Family

ID=20308003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18079/53A Expired GB748091A (en) 1952-07-01 1953-06-30 Improvements in reversible rotary tool holders for screw thread cutting tools

Country Status (4)

Country Link
US (1) US2795146A (en)
CH (1) CH327816A (en)
DE (1) DE1151715B (en)
GB (1) GB748091A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041893A (en) * 1959-07-24 1962-07-03 Allan S Johnson Ball-bearing reversing tapping attachment
JPS5294577A (en) * 1976-02-03 1977-08-09 Yukio Tanaka Clutch mechanism of tap holder

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281243B (en) * 1957-01-26
US3053101A (en) * 1959-08-05 1962-09-11 Charles H Roberts Tapping tool
US3226993A (en) * 1959-12-19 1966-01-04 Svenska Prec Sverktyg Ab Thread-cutting apparatus
BE623498A (en) * 1961-10-11
US3144783A (en) * 1963-01-18 1964-08-18 Herman R Dubendorfer Tapping attachment
US3446087A (en) * 1967-07-28 1969-05-27 Leesona Corp Drive mechanism
SE361610B (en) * 1972-03-29 1973-11-12 Paper Converting Scandinavian

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US915900A (en) * 1908-01-11 1909-03-23 Steinle Turret Machine Company Clutch-gearing.
US996426A (en) * 1910-10-25 1911-06-27 William Henry Ray Gearing.
DE620377C (en) * 1933-10-31 1935-10-19 Richard Herrmann Overload protection, especially for drilling and thread cutting machines
DE633779C (en) * 1934-04-25 1936-11-23 Richard Herrmann Overload protection
DE639804C (en) * 1934-12-07 1936-12-14 Richard Herrmann Tapping machine in which the work spindle is automatically switched to reverse after completion of the thread cutting
CH245140A (en) * 1944-04-17 1946-10-31 Jaccard Otto Samuel Tapper.
CH265576A (en) * 1945-03-28 1949-12-15 Svenska Precisionsverktyg Ab Tapping attachment.
AT171184B (en) * 1948-04-17 1952-05-10 Uno Allan Ing Alfredeen Thread cutting device
BE488557A (en) * 1948-04-17
DE810915C (en) * 1949-11-26 1951-08-16 Wilhelm Hammer Tap chucks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041893A (en) * 1959-07-24 1962-07-03 Allan S Johnson Ball-bearing reversing tapping attachment
JPS5294577A (en) * 1976-02-03 1977-08-09 Yukio Tanaka Clutch mechanism of tap holder
JPS5717646B2 (en) * 1976-02-03 1982-04-12

Also Published As

Publication number Publication date
DE1151715B (en) 1963-07-18
CH327816A (en) 1958-02-15
US2795146A (en) 1957-06-11

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