Maker : Guhring

Thread produced is too large

• incorrect tap, tap geometry not suitable for the application
  ⇒ apply correct tap for the material to be machined

Thread produced is too large or too small

• Incorrect radius in CNC program and therefore milling of incorrect circle
  ⇒ Correct milling radius until thread is dimensionally correct

Thread not cylindrical

• Feed rate too high
  ⇒ Reduce feed rate
• Synchronous milling path with long threads
  ⇒ Modify milling direction to opposite direction

Thread surface not according to requirements, chatter marks

• Cutting speed too high
  ⇒ Adjust cutting speed
• Insufficient tool or workpiece clamping
  ⇒ Check tool and workpiece clamping

Tool breakage

• CNC program error ⇒ Check CNC program
• Cutting rates too high ⇒ Adjust cutting rates

Tool life insufficient

• Cutting rates too high
  ⇒ Adjust cutting rates
• Tool applied uncoated
  ⇒ Apply coated tool
• Insufficient lubrication and chip evacuation
  ⇒ Improve lubrication, coolant delivery via the spindle

Tool breakage with drill / milling cutter

• Chip problems when drilling
  ⇒ Apply tool with IC
• Feed rates too high when drilling
  ⇒ Incorporate pecking cycles