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Drilling tools \ Technical introduction – solid carbide / HSSE drilling

                      drilling tools geometries


                grinding/geometry:
          HPC   ƒ tip angle 140°
           UNI
                ƒ 2-surface grinding
                ƒ spiral angle 30°
                ƒ 2 drill heels on 3xD and 5xD
                ƒ 4 drill heels on 8xD and 12xD
                ƒ dia. tolerance h7 or m7
                advantages:
                ƒ these geometries are specially developed for universal use
                ƒ the various coatings with cutting edge preparation prevents micro-breakouts on the blades, thereby increasing
                 their service life



          HPC   grinding/geometry:
           VA   ƒ tip angle 140°
                ƒ for HPC drilling in the material groups stainless steel, titanium, nickel and special alloys
                ƒ 2-surface grinding
                ƒ spiral angle 30°
                ƒ 2 drill heels
                ƒ dia. tolerance h7

                advantages:
                ƒ specially developed geometry for machining stainless steel, titanium, nickel alloys and special alloys
                ƒ Ultra M coating with cutting edge preparation prevents micro-breakouts on the blades, thereby increasing the
                 service life


                grinding/geometry:
          HPC   ƒ for HPC drilling in non-ferrous metals
           ALU
                ƒ tip angle 135°
                ƒ spiral angle 15°
                ƒ 6 drill heels
                ƒ dia. tolerance h7
                advantages:
                ƒ specialised use with long service life in non-ferrous metals such as aluminium, brass, bronze and cast iron
                ƒ 6 drill heels ensure even at very high cutting speeds for a drilling accuracy
                ƒ latest ALU-CC coating technology with superior form-fitting properties of the blade ensures sharp cutting edges
                 and excellent sliding behaviour as well as optimum chip removal even at high cutting speeds



                grinding/geometry:
           Typ
          U4    ƒ tip angle: 118°
                ƒ spiral angle: 38°
                ƒ precision-ground 4-surface grinding
                ƒ optimised point thinning similar to cross grinding
                ƒ straight main cutter

                cutting material:
                ƒ HSSE: HSS steel with 5% cobalt alloy with greater hot hardness for increased loads
                advantages:
                ƒ suitable for a wide range of applications thanks to the universal geometry design
                ƒ high level of process reliability through precision grinding
                ƒ extremely good centring properties thanks to the 4-surface grinding with point thinning results similar to cross-
                 grinding (no centring required)
                ƒ low process forces (feeding force and torque) through optimised flute profile
                ƒ extremely precise, dimensionally accurate drilling in terms of the diameter and the roundness through smooth
                 geometry design














              Source: Hahn+Kolb Werkzeuge GmbH
              Technical data subject to change.                                           www.iconridge.com  9
              Availability subject to country specific rules and regulations.
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