Flat Drill Applications: Uses, Benefits and Selection

Flat Drill Applications and Benefits

Flat Drill Applications include producing large, shallow, flat-bottom holes in wood, plastics, nonferrous metals, and selected composite materials. A flat drill uses a broad cutting edge to remove material efficiently where a conventional twist drill may leave a conical bottom.

When Should You Use a Flat Drill?

• Use it for flat-bottom recesses, counterbores, and large-diameter shallow holes.
• Choose it when bottom geometry matters more than deep-hole chip evacuation.
• Avoid unstable setups, very deep holes, or hard materials without a suitable grade and coolant plan.

Select diameter, cutting-edge material, point geometry, shank, and coating according to the workpiece and machine. Rigid workholding, low runout, controlled feed, and effective chip removal reduce chatter, heat, and edge chipping. A dependable cutting tool manufacturer can recommend geometry and parameters; see general drill bit principles for comparison.

Flat Drill FAQ

What is the main advantage of a flat drill? It creates a wide hole with a flatter bottom and can remove material quickly in suitable applications.

Can a flat drill make deep holes? It is mainly suited to shallow or moderate depths. Deep holes need careful chip evacuation and may be better served by another drill design.