Page 729 - ISCAR(TURNING-CATALOG-42-2022)
P. 729
USER GUIDE
THREADING
Cause Solution
• Unsuitable threading profile • Adjust to correct tool, anvil, and insert
• Adjust center height
• Incorrect center height
Incorrect Thread Profile
• Change the program
• Incorrect pitch in the program
• Cutting edge too cold • Reduce RPM
• Depth of cut too large • Reduce depth of cut/Increase
Broken Nose During 1 st Pass • Incorrect center height • Check turned dia.
• Wrong grade
number of infeed passes
• Use tougher grade
• Wrong turned dia. prior to threading
• Adjust center height
• Infeed depth too shallow
• Change depth of cut
• Wrong inclination anvil
• Reselect anvil
• Tool overhang tool long
• Reduce tool overhang /
Use Anti-vibration bar
• Wrong cutting speed • Increase/reduce RPM
• Excessive heat in cutting zone • Reduce depth of cut
Poor Surface Finish • Inadequate coolant supply • Apply coolant
• Modify flank infeed
• Poor chip control
• Wrong inclination anvil
• Reselect anvil
• Reduce tool overhang
• Tool overhang too long
• Check center height
• Incorrect center height
• Excessive heat in cutting zone • Reduce RPM /change depth
of cut /check turned dia.
• Wrong grade • Use coated grade /check turned
Poor Chip Control • Wrong turned dia. prior to threading • Apply coolant
• Inadequate coolant supply
dia./use M/B-Type inserts
• Incorrect method of infeed
• Check turned dia.
• Modify flank infeed 3-5°
727
