b'Shops that experiment with cutting tools only to experienceshorter-than-expected tool life can examine toolbehavior to help find and correct the causes of failure.With increased focus on hard- rials. Shops that want to ensure theyfit from toolmaker expertise to op-part turning, shops must decidemake the right choices betweentimize the productivity of their cut-as well whether to machine beforehardness and toughness can bene- ting applications.CTEor after a material reaches its hard-ened state, plus they have to select cutting tools that match the hard- Pionexness of their workpiece materials. In a green state, many materials test at half the hardness they dem-onstrate after hardening, with ob- NEW GENERATION THREADING TOOLS FROM vious effects on tool selection, life and behavior.Additionally,casehardened and through-hardened materials High-performance machiningpresent two very different hard-nessscenarios.Casehardening higher cutting speedscreates a hard surface with poten-outstanding tool lifetially softer material underneath it while through hardening produces universal application in a wide a uniformly hardened workpiece. Invariety of materialsthese cases, DOC plays a vital role in tool selection because it deter-mines whether a task requires an insert that can cut harder or softer material.Cutting tool manufacturers strive to help customers succeed with in-novative tools and thorough sup-port for informed tool selection. Successful toolmakers will continue to develop grades, geometries and coatings that effectively handle new workpiece materials and to add per-formance options for existing mate-about the author Aaron Eller is product manager of ISO turning/advanced materi-als for Seco Tools LLC, Troy, Michi-gan. For more in-formation about the companyswww.guhring.com(800) 776-6170cutting tools, call 248-528-5200 or visit www.secotools.com.ctemag.com/cteguide.com41CuttingMaterial.indd 41 4/16/20 5:30 PM'