Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion
Patent
1975-03-31
1976-06-29
McGehee, Travis S.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having axial, core-receiving central portion
408227, 408703, B23B 4102, B23B 5104
Patent
active
039663493
ABSTRACT:
Uneven wear of the cutting edges of rotating trepanning or drilling tools is avoided by employing at least two cutting blades, by providing a single support strip embedded in an elastically pliable material, and by arranging the cutting blades such, that the resultant force of the cutting forces produced during the drilling operation is directed to the support strip and is of a magnitude such that the lubricant film bracing said strip against the borehole wall does not break away.
REFERENCES:
patent: 2942501 (1960-06-01), Kallio
patent: 3014386 (1961-12-01), Kallio
Greuner Bernd
Osman Mohamed
Gebrueder Heller
Kalil Eugene J.
McGehee Travis S.
Murphy Francis J.
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