Page 109 - THREADING CATALOG
P. 109
USER GUIDE
Cause Solution
• cutting edge too cold • reduce RPM THREAD TURNING
• depth of cut too large
Broken Nose During 1 st Pass • wrong turned dia. prior to threading • use tougher grade
• reduce depth of cut/increase
• wrong grade
number of infeed passes
• check turned dia.
• incorrect center height
• 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
• modify flank infeed
• poor chip control
Poor Surface Finish • inadequate coolant supply • apply coolant
• 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
Poor Chip Control • inadequate coolant supply • use coated grade /check turned
cut /check turned dia.
• wrong grade
dia./use m/b-type inserts
• wrong turned dia. prior to threading
• incorrect method of infeed
• apply coolant
• check turned dia.
• modified flank infeed 3-5°
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