Hole quality and tool life depend on entry control, chip evacuation, coolant delivery and a stable setup.
Plan chip evacuation
Match flute design and drilling strategy to the hole depth, material and available coolant delivery.
Read the wear pattern
- Margin wear can point to rubbing or poor alignment.
- Chipping can indicate an unstable setup or a fragile edge.
- Built-up edge often points to material behavior, speed or edge sharpness.