Machine Issue or Tooling Issue?

Follow these 6 steps to determine the origin of your problem:

Touch off tool length in question and write down the tool tip reference position.
Remove the tool from the spindle and loosen the retention knob.
Re-tighten the retention knob, this time only finger tight, do not torque the knob.
Reload the toolholder in the machine.
Touch off tool length again and write down the tool tip reference position.
Compare the readings. If the numbers are different, the difference is the distances the toolholder stops short of full engagement with the spindle. If the numbers are the same, your toolholder is properly engaged with the spindle. Re-tighten the retention knob; no other adjustments need to be made.

Common Symptoms that Indicate an Underlying Tooling Problem »