TurningMillingDrillingTechnicalInformationIndex General turning Chip breaker overview Negative inserts A Finishing SF P M K Double sided chip breaker in combination with cermet grades. Geometry with high sharpness for improved chip control and great surface quality. Ideal for machining with small cutting depths and feed rates. B DF P K Double sided chip breaker with good chip control. Suitable for finishing and medium machining of steel and cast iron. ADF P M C Ground, double sided chip breaker with good chip control. Wide range of application due to excellent balance of sharpness and cutting edge stability. EF M S D Double sided chip breaker with sharp cutting edge and large rake angle for finishing of stainless steel. NF S M E Double sided chip breaker with ground cutting edge and large rake angle for finishing. E-tolerance for high repeatability. A 16