Каталог Iscar сверла ружейные и для глубокого сверления 2022 - страница 123

GUNDRILLS USER GUIDE Typical Gundrill Applications - Typical Gundrill Applications - Main Drilling Methods Chip Evacuation and Coolant Flow Guide Barrel Figure 1 Figure 3 Pre-Drilled Guide Hole Boring with chip evacuation and coolant flowing opposite the boring direction Figure 2 User Guide The gundrill is not a self-centering tool. Therefore, 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 Figure 4 with a means for guiding the gundrill, preferably during the entire Drilling of solid material with chip evacuation and drilling process. coolant flow opposite the drilling direction 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. The guide pads contribute to the high degree of calibration and provide burnishing of the drilled hole. Figure 5 Boring with chip evacuation in the boring direction Figure 6 Boring with a staged tool chip evacuation and coolant flow in the boring direction 307