AT191821B - Zweiflügelige, mit Hartmetallschneiden versehene Drehbohrkrone - Google Patents

Zweiflügelige, mit Hartmetallschneiden versehene Drehbohrkrone

Info

Publication number
AT191821B
AT191821B AT191821DA AT191821B AT 191821 B AT191821 B AT 191821B AT 191821D A AT191821D A AT 191821DA AT 191821 B AT191821 B AT 191821B
Authority
AT
Austria
Prior art keywords
double
drill bit
cutting edges
rotary drill
carbide cutting
Prior art date
Application number
Other languages
English (en)
Inventor
Karl Ing Cermak
Original Assignee
Schoeller Bleckmann Stahlwerke
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 Schoeller Bleckmann Stahlwerke filed Critical Schoeller Bleckmann Stahlwerke
Application granted granted Critical
Publication of AT191821B publication Critical patent/AT191821B/de

Links

AT191821D 1955-07-11 1955-07-11 Zweiflügelige, mit Hartmetallschneiden versehene Drehbohrkrone AT191821B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT191821T 1955-07-11

Publications (1)

Publication Number Publication Date
AT191821B true AT191821B (de) 1957-09-25

Family

ID=3665652

Family Applications (1)

Application Number Title Priority Date Filing Date
AT191821D AT191821B (de) 1955-07-11 1955-07-11 Zweiflügelige, mit Hartmetallschneiden versehene Drehbohrkrone

Country Status (1)

Country Link
AT (1) AT191821B (de)

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