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USER GUIDE
      SOLID CARBIDE DRILLS



          Coolant Pressure and Volume Recommendations

                                                              Stability
                                                              The stability of the application volume is important in order
               60
                                                              to obtain the very best tool life and hole accuracy. Check
              Coolant Pressure [bar]  40           16  Coolant Volume [l/min]  Unstable conditions can cause tool breakage.
                                                              the condition of the machine spindle, fixture and fixturing
                                                   20
               50
                                                              of the component to secure maximum stability and rigidity.
                                                   12
              30
                                                                   Stationary Drill
                                                                                          Rotating Drill
               20
                                                   8
                                                                  Max 0.02 mm
               10
               0.0                                 4
                    3  5      10     15     20
              Tool Diameter (mm)
            Required Coolant Pressure  Required Coolant Volume                                 Max 0.02 mm
              Optimum pressure      Optimum volume
              Good pressure         Good volume                   Correct Direction     Incorrect Direction
              Minimum pressure      Minimum pressure
            Required coolant pressure and volume for SCD
            drills with internal coolant spiral nozzles.

            Force and Power Characteristics
                              Feed Force
             (kN)

             3.0                                                   External Coolant      External Coolant
             2.5                                              Tool Life
             2.0                                              Drills should not be used with flank wear
                                                              exceeding 0.2-0.3 mm.
             1.5
             1.0
                                                                                       0.2-0.3 mm
             0.5
             0.0
                 2   4    6   8    10  12  14  16  18
                                          Drill Diameter (mm)
                 f=0.30 mm/rev
                 f=0.25 mm/rev
                 f=0.20 mm/rev

                         Net Power Consumption
             (kW)

             3.0
             2.5
             2.0
             1.5
             1.0
             0.5
             0.0
                 2   4    6   8    10  12  14  16  18
                                          Drill Diameter (mm)
                 f=0.30 mm/rev
                 f=0.25 mm/rev
                 f=0.20 mm/rev
            Material: SAE 4340
            Speed:  100 m/min
            Values may change for different materials and
            drilling conditions.



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