Drill Bit and Associated Method of Making a Drill Bit
AssigneeC4 Carbides Limited
InventorPaul Duggan
Life of this patent
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Abstract
There is provided a method of making a drill bit including a base portion and a cutting portion. In the method, the base portion and the cutting portion are provided as separate pieces. The cutting portion is heat treated to form a cutting surface having braze material and abrasive particles. After heat treatment, the base portion is attached to the cutting portion. The abrasive particles may be substantially spherical diamond particles and have a diameter in the range 300-700 microns. A drill bit being a grinding pin or hole saw is also provided.
Claims20
A method of making a drill bit comprising a base portion and a cutting portion, the method comprising:
- providing the base portion and the cutting portion as separate pieces;
- heat treating the cutting portion to form a cutting surface comprising braze material and abrasive particles;
- and
- attaching, after heat treatment, the base portion to the cutting portion.
A drill bit, comprising:
- a base portion;
- and
- a cutting portion;
- wherein the cutting portion comprises a cutting surface comprising braze material and abrasive particles;
- and
- wherein the cutting portion is formed separately to the base portion and fixing means attach the base portion to the cutting portion.
Dependencies are inferred from the claim text.