Каталог Iscar вращающийся инструмент 2017 - страница 665

USER GUIDE When using a gundrill on a lathe machine, a short solid carbide centering drill should be used prior to the gundrill. Once the gundrill enters the pre-drilled hole, it is self-guided. 1 Never try to penetrate the Drilling a pre-hole workpiece by using a gundrill (drill diameter +0.02 mm) 2 Gundrill penetration through the pre-hole A shallow pre-hole can’t lead the unbalanced gundrill 2 x D min Drill Penetration Instructions 1 Rotate the drill counterclockwise prior to 2 Stop the drill rotation and start 3 Rotate the drill clockwise and during hole penetration the coolant prior to drilling operation The Influence of Tool vs. Workpiece Rotation Rotating tool Rotating workpiece Rotating tool & workpiece GUNDRILLS Worst Medium Best The maximum misalignment between the drill Rotating Workpiece bushing and the workpiece center line Bushing should not exceed 0.02 mm (.0008”). Stationary Drill Max. 0.02 mm .0008" 661