IE802324L - Self-tapping screw - Google Patents

Self-tapping screw

Info

Publication number
IE802324L
IE802324L IE232480A IE232480A IE802324L IE 802324 L IE802324 L IE 802324L IE 232480 A IE232480 A IE 232480A IE 232480 A IE232480 A IE 232480A IE 802324 L IE802324 L IE 802324L
Authority
IE
Ireland
Prior art keywords
thread
tip portion
self
notch
angle
Prior art date
Application number
IE232480A
Other versions
IE50337B1 (en
Original Assignee
Schewe Robert Kg
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 Schewe Robert Kg filed Critical Schewe Robert Kg
Publication of IE802324L publication Critical patent/IE802324L/en
Publication of IE50337B1 publication Critical patent/IE50337B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0078—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw with a shaft of non-circular cross-section or other special geometric features of the shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Connection Of Plates (AREA)
  • Dowels (AREA)

Abstract

The self-tapping screw with a sheet-metal-type screw-thread (4) and a conical tip portion (2) is characterised by the following features: the thread (4) pitch is between 2/3 and 3/4 of the core (1) diameter; the flank angle of the thread (4) is between 30 DEG and 50 DEG ; there is provided in the tip portion (2) a V cross-section cutting notch (5), the included angle ( gamma ) of which is 150 DEG to 160 DEG ; the bottom (6) of the notch (5) intersects the screw axis in or near the tip portion (2). The thread (4) flank angle is preferably 40 DEG . The tip portion (2) is formed as a truncated cone, the end diameter being 10 to 20% smaller than the core diameter. The angle of the notch bottom (6) in relation to the screw axis is 20 DEG to 35 DEG . <IMAGE> [GB2063745A]
IE232480A 1979-11-24 1980-11-10 Self-tapping screws for plastics parts IE50337B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7933213 1979-11-24

Publications (2)

Publication Number Publication Date
IE802324L true IE802324L (en) 1981-05-24
IE50337B1 IE50337B1 (en) 1986-04-02

Family

ID=6709413

Family Applications (1)

Application Number Title Priority Date Filing Date
IE232480A IE50337B1 (en) 1979-11-24 1980-11-10 Self-tapping screws for plastics parts

Country Status (2)

Country Link
GB (1) GB2063745B (en)
IE (1) IE50337B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601625A (en) * 1984-05-11 1986-07-22 Illinois Tool Works Inc. Self drilling threaded insert for drywall
US20040156696A1 (en) * 2002-11-27 2004-08-12 Grosch Gregory E. Fastener for fiberglass and other composite structures
SE538636C2 (en) * 2014-12-12 2016-10-04 Essve Produkter Ab Concrete screw

Also Published As

Publication number Publication date
GB2063745A (en) 1981-06-10
GB2063745B (en) 1983-02-16
IE50337B1 (en) 1986-04-02

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