Step Drill Bit

Our offered range of Step Drill Bit is a drill bit that has the tip ground down to a different diameter. The transition between this ground diameter and the original diameter is either straight, to form a counterbore, or angled, to form a counter sink. The advantage to this style is that both diameters have the same flute characteristics, which keeps the bit from clogging when drilling in softer materials, such as aluminum; in contrast, a drill bit with a slip-on collar does not have the same benefit. Most of these bits are custom-made for each application.

Usage:
1. Put on appropriate eye protection (safety glasses or goggles).
2..Place the tip of the center punch on the metal to be drilled at the location of the desired hole. Hit the blunt end
of the center punch with the hammer to leave an indentation (referred to as a center mark). This indentation will
provide a place for the drill bit to "catch" so it doesn't drift to the wrong location on the work.
3. Secure the self-starting step drill bit into the chuck of the drill motor. Apply cutting and tapping fluid to the center
mark and the step drill drill bit.
4. Align the tip of the self-starting step drill bit with the center mark on the metal's surface. Depress the drill's
trigger to start drilling the hole. Run the small step drill bit completely through the metal. Apply additional cutting
and tapping fluid as necessary to keep the step drill bit cool.