TurningMillingDrillingTechnicalInformationIndex Chip breaker overview General turning Negative inserts Finishing A NGF S M Double sided chip breaker with ground cutting edge and large rake angle for finishing. E-tolerance for high repeatability. Wiper B WG P M K Double sided chip breaker with wiper geometry. Allows to double the feed rate and improves the surface quality. Medium machining C DM P K Double sided chip breaker for medium machining. Wide range of application due to excellent balance of sharpness and cutting edge stability. ZM P D Double sided chip breaker for medium machining. Wide range of application due to stable cutting edge and large rake angle. Very suitable for machining of steel. PM P K E Double sided chip breaker for medium machining. Wide range of application in steel and cast iron. A 17