Page 159 - Demo

157PRE-THREAD DRILLING WITH CHAMFERING %u00bd%u0009Pre-Thread Assembled Combined DrillsAssembled combined drills belonging to the Pre-Thread line carry two unique indexable chamfering inserts and interchangeable drilling heads. The indexable chamfering inserts placed symmetrically on the drill and cutting forces are balanced for optimal performance. This feature is especially essential in through hole application. The indexable chamfering inserts were designed for chamfering and counterboring on a wide range of materials with optimal chip formation.Pre-Thread DrillingBlind HoleDrilling with ChamferingDrilling with Chamfering and Counterboring Through HoleDrilling with ChamferingDrilling with Chamfering and Counterboring The indexable chamfering inserts designated AOMT %u2026 are available with two types of chipformers DT and HD. The DT chipformer is suitable for machining all kinds of materials, while the HD chipformer is designed for machining low carbon steel and soft materials.