Hey everyone,

I am trying to turn some LH threads on our Haas lathe. The insert I am using is 16ER AG 60 IC908. https://www.iscar.com/eCatalog/Item....app=0&GFSTYP=M

The material is 17-4 PH Stainless Steel.

I have it running at 1900 RPM and 0.05 in/rev as the thread is 1/2-20.

The issue I am having is the insert keeps chipping. Is there a better insert I could be using for 17-4?