pcbn inserts in solid cbn and tipped cbn for hard turningPCBN inserts for turning cast iron and hardened steel pcbn is the second hardest material in the world, and cbn related high precision cutting tools are introduced to industry, achieved high productivity and cost reductions. pcbn is the short name of polycrystalline cubic boron nitride, and pcbn inserts are mainly for the hard metal turning to replace the conventional machining way of grinding.(PDF) 155007510EjemplosIngenieriaRev1 Mario Cen155007510EjemplosIngenieriaRev1EJ204 Subaru EngineThe Subaru EJ204 was a 2.0litre horizontallyopposed (or 'boxer') fourcylinder petrol engine with double overhead camshafts. The naturally aspirated E204 engine was initially introduced in the 2005 S