Hole Drift or Frequent Drill Breakage: What Should You Check?
A practical checklist for runout, spotting, holder condition, alignment, and chip evacuation in drilling.
When edge life drops, finish becomes unstable, chips get hard to control, or the machine stops too often for tool changes, do not start by asking which tool is cheaper. Start with Hole Drift or Frequent Drill Breakage: What Should You Check?, then read what the material, machine, holder, coolant, and parameters are telling you.
What to Check
- hole drift and drill breakage often come from runout, spotting, and clamping rather than parameters alone
- if the drill starts cutting on one side, stop and inspect the point geometry and alignment first
- in deeper holes separate chip evacuation problems from alignment problems
How to Apply It on the Shop Floor
On the shop floor, work through one issue at a time. Confirm material and hardness first, then check machine rigidity, holder, overhang, coolant, and clamping. If speed or feed needs tuning, change one variable and record the result so the team knows what actually helped.
Important Cautions
Use this article as a decision framework, not fixed cutting data. Before production use, compare it with the tool maker catalog, machine condition, and shop safety limits. If the case is unclear, send the current tool, material, operation, and problem details to CAGO for review.