Bit for cutting drywall
AssigneeCredo Technology Corporation
InventorCarl W. Risen JR.
Life of this patent
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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.
Claims16
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.
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.
Dependencies are inferred from the claim text.