CBN ISOTURN INSERTS USER GUIDE Advanced Cutting Materials Grade ISO Grade Description Coating Layers Coating Color* Uncoated A high speed grade for continuous machining. The IB05H binding force between the particles is now improvedby use of coarse PCBN grains which provide excellent wear resistance results. H05-H10 Base A high speed grade for continuous machining. IB05S The binding force between the particles is nowimproved by use of coarse PCBN grains which provide S05 excellent wear resistance results. Base Extra fine PCBN grain size. Suitable for high speed IB10H machining of hardened steels (45-65 HRC) under stable conditions. H10 Base Very hard PCBN grade with fine grain size. Suitable for IB10S machining auto engine valve seats, sintered metals and Titanium alloys. S10 Base Extra fine PCBN grain size with PVD coating. Suitable IB10HC for high speed machining of hardened steels (45-65 HRC) under stable conditions. TiN H10 Base IB20H A combination of coarse and fine PCBN grain. Suitablefor general and interrupted cutting of hardened steels. H20 Base Coated PCBN grade for hardened steel turning. IB20HC High chipping resistance & extremely tough substrate for all-round use. TiN H15-H25 Base IB25HA A tough PCBN grade with PVD coating suitable forgeneral cutting of hardened steels. TiN H25 Base IB25HC Medium PCBN grain size with PVD coating suitable forlight and medium interrupted cutting of hardened steels. TiN H25 Base * For coated grades 251