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°































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