DE66580C - Drill with three cutting edges - Google Patents

Drill with three cutting edges

Info

Publication number
DE66580C
DE66580C DENDAT66580D DE66580DA DE66580C DE 66580 C DE66580 C DE 66580C DE NDAT66580 D DENDAT66580 D DE NDAT66580D DE 66580D A DE66580D A DE 66580DA DE 66580 C DE66580 C DE 66580C
Authority
DE
Germany
Prior art keywords
cutting edges
drill
point
hand
cut
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 - Lifetime
Application number
DENDAT66580D
Other languages
German (de)
Original Assignee
TH. höfer in Hamburg, Jacobikirchhof 31
Publication of DE66580C publication Critical patent/DE66580C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/20—Number of cutting edges
    • B23B2251/202—Three cutting edges

Landscapes

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

Description

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

Claims (1)

Patent-Anspruch:Patent claim: Bohrer, gekennzeichnet durch drei Schneiden, deren Schnittkanten in der Achse des durch die drei Schnittflächen bestimmten senkrechten Kreiskegelmantels (in einem Punkte) zusammentreffen, zum Zwecke, einestheils ein Schneiden schon vom Mittelpunkte aus zu ermöglichen, anderentheils eine Dreipunktstützung der Bohrerschneiden und infolge dessen eine Führung allein durch die letzteren herbeizuführen.Drill, characterized by three cutting edges, the cutting edges of which are in the axis of the through the three cut surfaces of the defined vertical circular cone jacket meet (at one point), for the purpose of, on the one hand, making it possible to cut from the center point, on the other hand, a three-point support of the drill cutting edges and, as a result, a guide to be brought about by the latter alone.
DENDAT66580D Drill with three cutting edges Expired - Lifetime DE66580C (en)

Publications (1)

Publication Number Publication Date
DE66580C true DE66580C (en)

Family

ID=340285

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT66580D Expired - Lifetime DE66580C (en) Drill with three cutting edges

Country Status (1)

Country Link
DE (1) DE66580C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747945C (en) * 1938-04-06 1944-10-20 Tool for machine drilling out and smoothing of pre-drilled holes
FR2381512A1 (en) * 1977-02-25 1978-09-22 Saratch Marc Drill bit for brick and concrete - has two to four lobes with inverted vee point to commence cutting at periphery
WO2003025486A2 (en) * 2001-09-14 2003-03-27 Jakobus Lewis Furnace taphole drill
EP1393842A1 (en) * 2002-06-19 2004-03-03 Noma di Belleri F.lli S.n.c. Insert bit for drilling, turning and spot-facing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747945C (en) * 1938-04-06 1944-10-20 Tool for machine drilling out and smoothing of pre-drilled holes
FR2381512A1 (en) * 1977-02-25 1978-09-22 Saratch Marc Drill bit for brick and concrete - has two to four lobes with inverted vee point to commence cutting at periphery
WO2003025486A2 (en) * 2001-09-14 2003-03-27 Jakobus Lewis Furnace taphole drill
WO2003025486A3 (en) * 2001-09-14 2003-10-16 Jakobus Lewis Furnace taphole drill
EP1393842A1 (en) * 2002-06-19 2004-03-03 Noma di Belleri F.lli S.n.c. Insert bit for drilling, turning and spot-facing

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