Каталог Iscar вращающийся инструмент 2017 - страница 674

USER GUIDE Typical Gundrill Applications Main Drilling Methods User Guide The gundrill is not a self-centering tool. Therefore Figure 1 an external means must be used to guide it to the point of entry into the workpiece. It is recommended that the machine tool be equipped with a means for guiding the gundrill, preferably during the entire drilling process. An alternative method is a pre-drilled guide hole (figure 2), which is common for machining centers. Once the drill has been fully engaged into this hole, it continues to be self-guided. Guide Barrel The guide pads contribute to the high degree of calibration and provide burnishing of the drilled hole. Figure 2 Pre-Drilled Guide Hole Typical Gundrill Applications - Chip Evacuation and Coolant Flow Figure 3 Figure 4 GUNDRILLS Boring with chip evacuation and coolant Drilling of solid material with chip evacuation and flowing opposite the boring direction coolant flow opposite the drilling direction Figure 5 Figure 6 Boring with chip evacuation in the boring direction Boring with a staged tool Chip evacuation and coolant flow in the boring direction 670 ISCAR