Bit for cutting drywall
AssigneeCredo Technology Corporation
InventorCarl W. Risen, Jr.
Life of this patent
Estimating the term…
Abstract
A drywall routing bit for cutting laterally in a drywall or sheetrock panel includes an elongated body terminating at one end in a tip for penetrating the panel. The bit includes a single helical flute which defines a cutting edge at a helix angle relative to said longitudinal axis of the bit of 36°-38°. The cutting edge of the flute is defined at a rake angle of 20°-26°. The fluted portion of the bit has a web thickness that is 60%-63% of the bit outer diameter, for a ⅛″ diameter bit. The tip of the bit includes angled chisel edges subtending an angle of 113°-123° and following a shallow S-shaped curvature relative to a plane including the subtended angle.
Claims14
A bit for cutting laterally in a drywall or sheetrock panel, comprising:
- an elongated body terminating at one end in a tip for penetrating the panel, said elongated body defining a longitudinal axis;
- and
- a single helical flute defined on said elongated body, said flute defining a cutting edge at a rake angle relative to said longitudinal axis of between 20 degrees and 26 degrees,
- wherein said tip includes angled chisel edges.
A bit for cutting laterally in a drywall or sheetrock panel, comprising:
- an elongated body terminating at one end in a tip for penetrating the panel, said elongated body defining a longitudinal axis;
- and
- a single helical flute defined on said elongated body, said flute defining a cutting edge at a helix angle relative to said longitudinal axis of between 36 degrees and 38 degrees,
- wherein said cutting edge is defined at a rake angle relative to said longitudinal axis of between 20 degrees and 26 degrees.
A bit for cutting laterally in a drywall or sheetrock panel, comprising:
- an elongated body terminating at one end in a tip for penetrating the panel, said elongated body defining a longitudinal axis;
- and
- a single helical flute defined on said elongated body, said flute defining a cutting edge at a helix angle relative to said longitudinal axis of between 36 degrees and 38 degrees,
- wherein said flute defines an outer diameter and said flute defines a web thickness at said elongated body that is between 60 percent and 63 percent of said outer diameter.
A bit for cutting laterally in a drywall or sheetrock panel, comprising:
- an elongated body terminating at one end in a tip for penetrating the panel, said elongated body defining a longitudinal axis;
- and
- a single helical flute defined on said elongated body, said flute defining a cutting edge at a helix angle relative to said longitudinal axis of between 36 degrees and 38 degrees,
- wherein said tip includes angled chisel edges.
A bit for cutting laterally in a drywall or sheetrock panel, comprising:
- an elongated body terminating at one end in a tip for penetrating the panel, said elongated body defining a longitudinal axis;
- and
- a single helical flute defined on said elongated body, said flute defining a cutting edge at a rake angle relative to said longitudinal axis of between 20 degrees and 26 degrees,
- wherein said flute defines an outer diameter and said flute defines a web thickness at said elongated body that is between 60 percent and 63 percent of said outer diameter.
A bit for cutting laterally in a drywall or sheetrock panel, comprising:
- an elongated body terminating at one end in a tip for penetrating the panel, said elongated body defining a longitudinal axis;
- and
- a single helical flute defined on said elongated body, said flute defining a cutting edge at a rake angle relative to said longitudinal axis of between 20 degrees and 26 degrees,
- wherein said tip is configured for cutting axially into the panel.
Dependencies are inferred from the claim text.