The SAPORITI FL450 drilling-boring-lapping machine has been expressly designed for the complete machining of twin screw barrels. The machine feed movements slide on precision roller bearings which provide high precision and long machine lifetime. The CNC Siemens 840D controls 5 axes and facilitates the programming of billet drilling, push and pull boring and lapping operations. Main features of this special boring machine is the workpiece setup on two carriages with controlled cross feed. After finishing the first hole the machine automatically translate the barrel to machine the second one. This machine is available in different versions up to 5000 mm length and 600 mm workpiece diameter.