Depth of Cut Guidelines


  • Shoot for around 3%-to-5% of dia. RDOC, no matter how many flutes are on the tool.
  • Quick Troubleshooting
    • Are you experiencing poor surface finish?
      • Check your RDOC, it may be too light of a cut (see #1 above)
      • Lower your IPM, Increase your RPM
      • Check your tool runout (at end/ corner of tool — with tool mounted in the holder, in the machine) shoot for .0005 TIR max.
  • Tool Life Issues
    • Spring passes allow for tool rubbing (lowers tool life) and material work hardening — avoid (or at least minimize of) if possible.

Ramping Angles

  • NXG-2: 5-10°
  • NXG-3: 5-10°
  • NXG-4: 1-10°
  • NXG-5: 1-8°
  • NXG-6: 1-5°
  • NXG-7: 1-3° (caution here)

Note: Lower angles will experience chip thinning and thus allow for higher feed adjustments.

Radial (RDOC) & Axial (ADOC) Depth of Cut


NXG-25% to 50%xDup to 1.00xD
NXG-35% to 50%xDup to 1.00xD
NXG-45% to 50%xDup to 1.00xD
NXG-55% to 40%xDup to 1.50xD
NXG-65% to 30%xDup to 1.75xD
NXG-75% to 10%xDup to 2.00xD

D = Tool Cut Diameter


NXG-38% to 40%xDup to 3.00xD
NXG-58% to 30%xDup to 3.50xD
NXG-68% to 20%xDup to 3.75xD
NXG-77% to 10%xDup to 4.00XD

D = Tool Cut Diameter

Slot Depth Ranges

NXG-2: up to 2.00xD
NXG-3: up to 2.00xD
NXG-4: up to 1.50xD
NXG-5: up to 0.50xD
NXG-6: up to 0.25xD
NXG-7: Not Recommended

Tips for slotting:

  1. Follow the chart abo ve.
  2. Use chip-breaker tools t o
    manage chip evacuation.
  3. Ensure good coolant flush,
    in direction of the tool’s chip
  4. Are you less then these
    listed ranges? If so, then
    there could be room for feed
    increase adjustments.

Need help deciding?
Talk to our product experts!

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