Page 241 - Demo

239DEEP HOLE DRILLINGFigure 6.7.2.4drilling headtwo-layered steminner tubeinclined slotsThe diametric dimensions of the inner and outer pipes affect two flow sections of a DTS drill: the size of the coolant supply channel and the diameter of the outlet channel.DTS drill head designs are quite diverse and can be classified as follows:Drill HeadsModular Drill Head (WithoutCartridges)Adjustable Drill Head(With Cartridges)TRI-DEEP ISCAR-DEEP-DRILLIndexable Insert DrillsBrazed TipsDrilling HeadFINE-BEAM ISCAR-DEEP-DRILLThe DTS drill heads have a hollow cylindrical shape with a single cutting edge. The diameter of the drill head determines the possibility of using a particular design of the cutting part and the way it is assembled to the head body. The guide pads are positioned at the circumference of the drill head. A very important and distinctive feature of the DTS drill head is the coolant supply holes, which are located along the perimeter of the drill head body (Figure 6.7.2.5).Figure 6.7.2.5coolant supply holes