Step drill bit

A step drill bit comprising:

• a shank extending along a bit axis;
• a body having a proximal end adjacent the shank and a distal end opposite the proximal end, the body including a bit tip adjacent the distal end, the bit tip including a diameter measured in a direction perpendicular to the bit axis, the diameter of the bit tip being 0.125 inches, the body defining a plurality of axially stacked, progressively sized steps including a first step adjacent the bit tip and a terminal step at the proximal end, the plurality of steps including at least 13 steps, the body having a length measured parallel to the bit axis between the distal end and the proximal end, the length being less than 4 inches;
• a flute formed in the body, the flute extending from the distal end to the proximal end;
• and
• a cutting edge extending along the flute.

A step drill bit comprising:

• a shank extending along a bit axis;
• a body having a proximal end adjacent the shank and a distal end opposite the proximal end, the body including a bit tip adjacent the distal end, the bit tip including a diameter measured in a direction perpendicular to the bit axis, the diameter of the bit tip being 0.125 inches, the body defining a plurality of axially stacked, progressively sized steps including a first step adjacent the bit tip and a terminal step at the proximal end, the plurality of steps including at least 13 steps and including a plurality of stop-on steps and a plurality of intermediate steps, each stop-on step including a first length measured in a direction parallel to the bit axis, the first length being in a range between 0.1 inches and 0.25 inches, each intermediate step including a second length measured in a direction parallel to the bit axis, the second length being in a range between 0.075 inches and 0.12 inches, the first length being greater than the second length;
• a flute formed in the body, the flute extending from the distal end to the proximal end;
• and
• a cutting edge extending along the flute,
• wherein the body has a third length measured parallel to the bit axis between the distal end and the proximal end, and wherein the third length is less than 4 inches.