Carbide drill bit for composite materials
AssigneePrecorp, Inc.
InventorsRichard M. Garrick, John A. Bunting
Life of this patent
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Abstract
A drill bit for producing holes in composite materials is disclosed. The drill bit includes an elongate drill bit body having a drill bit diameter. The drill bit also includes at least two helical flutes. The helical flutes have a reverse helix angle and a primary cutting edge. The primary cutting edge may have a positive rake angle. The drill bit further includes a point having a point length. The drill bit may also include a cutting tip with a tip angle and a tip length. The tip length is at least twice the drill bit diameter.
Claims19
A drill bit for producing holes in composite materials comprising:
- an elongate drill bit body having a drill bit diameter;
- at least two helical flutes having:
- a reverse helix angle of about 0.5 to 10 degrees;
- and
- a primary cutting edge with a positive radial rake angle of at least 6 degrees;
- a point having a point length;
- and
- a cutting tip with a tip angle and a tip length of at least twice the drill bit diameter.
A drill bit comprising:
- an elongate drill bit body having a drill bit diameter;
- at least two helical flutes having:
- a reverse helix angle of 0.5 to 10 degrees;
- and
- a primary cutting edge with a positive radial rake angle of at least 6 degrees;
- a point having a point length of approximately half the drill bit diameter;
- and
- a cutting tip with a tip angle and a tip length.
A drill bit for producing holes in composite materials comprising:
- an elongate drill bit body having a drill bit diameter;
- at least two helical flutes having:
- a reverse helix angle of at least 0.5 degrees;
- and
- a primary cutting edge with a positive radial rake angle;
- a point having a point length of approximately half the drill bit diameter;
- and
- a cutting tip with a tip angle of approximately 17 degrees and a tip length of at least twice the drill bit diameter.
Dependencies are inferred from the claim text.