Annular hole cutter
AssigneeRotabroach Limited
InventorDerrick Merrill
Life of this patent
Estimating the term…
Abstract
A tipped annular hole cutter is made by brazing all the cutting tips (30) simultaneously to the cylindrical wall (12) of the cutter body. The tips (30) have outer and inner lands (32, 34) which locate against the outer and inner surfaces (52, 54) of the cylindrical wall (12). This accurately locates the tips radially during brazing. The radially inner face (46) of the tip (30) is inclined so as to define an inner clearance face which has the necessary circumferential and radial clearances without therebeing any need to grind the inner face (46) after brazing.
Claims11
A tipped annular hole cutter comprising a body having a cylindrical wall with outer and inner surfaces and a free end surface, and tips secured to said cylindrical wall by metal fusion, the tips being in said wall end surface and defining respective cutting edges, each said tip defining an unground inner clearance face with predetermined circumferential and axial clearances;
- each said tip having locating means thereon accurately radially locating said tips within said cutter body, the locating means on each said tip including an inner land adjoining said inner clearance face and engaging said inner surface of said body.
A tipped annular hole cutter comprising a body having a cylindrical wall with outer and inner surfaces and a free end surface, and tips secured to said cylindrical wall by metal fusion, the tips being in said wall end surface and defining respective cutting edges, each said tip defining an unground inner clearance face with predetermined circumferential and axial clearances;
- said tips include locating means for accurately locating said tips within said cutter body, said locating means including three lands, a first land extending partially along a peripheral edge of a first surface of said tip, a second land extending along the peripheral edge of the first surface opposite said first land and a third land extending along the edge of a second surface, opposite the first surface of the tip such that the third land is opposite the first land.
Dependencies are inferred from the claim text.