Drilling tool

A drill comprising:

• a tip portion comprising a tip;
• a longitudinal, rotational axis;
• a first flute and a second flute;
• a chisel edge being disposed at said tip of said drill;
• a first cutting tooth and a second cutting tooth being disposed between said flutes and being separated by said chisel edge;
• said first cutting tooth being asymmetrical with respect to said second cutting tooth;
• said first cutting tooth being of substantially similar size and comprising a substantially similar amount of material as said second cutting tooth;
• said first cutting tooth having a land which extends over approximately 90 degrees, and said second cutting tooth having a land which extends over approximately 90 degrees;
• said land of said first cutting tooth extends over a greater number of degrees than said land of said second cutting tooth;
• said first cutting tooth comprising:
• a first longitudinal cutting edge being disposed longitudinally along at least a portion of said first flute and being configured to make a rough cut in material in a rotational direction during operation;
• a first tip cutting edge being disposed on said tip portion of said drill and adjacent said first flute and being configured to first cut material during operation;
• a guide margin being disposed adjacent said first longitudinal cutting edge and being configured to follow said first longitudinal cutting edge during rotation;
• said guide margin having a substantially constant radius measured from the rotational axis;
• a support margin being configured to minimize vibration during cutting and being disposed to follow said guide margin during rotation and being disposed separate from and away from said guide margin;
• said support margin having a substantially constant radius being substantially the same as the radius of said guide margin;
• and
• a region having points with radii being less than the radius of said guide margin and said support margin being disposed between said guide margin and said support margin;
• and
• said second cutting tooth comprising:
• a second longitudinal cutting edge being disposed longitudinally along at least a portion of said second flute and being configured to cut material in the rotational direction during operation;
• a second tip cutting edge being disposed on said tip portion of said drill and adjacent said second flute and being configured to cut material;
• a clearance face being disposed adjacent said second longitudinal cutting edge and said second tip cutting edge and being configured to follow said second longitudinal cutting edge during rotation;
• said second longitudinal cutting edge and said clearance face being configured to make a smoothing and finishing cut to minimize roughness formed by a rough cut by said first longitudinal cutting edge;
• and
• points on said clearance face being disposed closer to the rotational axis than said second longitudinal cutting edge is disposed to the rotational axis.