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USER GUIDE
      DEEP DRILLING - BTA SYSTEM



          Technical Guide

              STS - Setting guidelines for cutting loads, fluid   DTS - Setting guidelines for cutting loads, fluid
              pressure and flow rate during STS operation       pressure and flow rate during DTS operation
                                Net power                                         Net power
                       25                                                25
                       20    Vc = 100 m/min                              20    Vc = 100 m/min
                            f = 0.25 mm/rev                                    f = 0.25 mm/rev
                       15                                                15
                  Pc (kW)  10                                      Pc (kW)  10

                        5                                                5
                                        Vc = 70 m/min                                     Vc = 70 m/min
                                        f = 0.15 mm/rev                                   f = 0.15 mm/rev
                         0  10  20  30  40  50  60  70                    0   10  20  30  40  50  60  70
                                 Drill dia. (mm)                                  Drill dia. (mm)
                                Feed force                                        Feed force
                       15                                                15

                                                                                Vc = 100 m/min
                             Vc = 100 m/min                                     f = 0.25 mm/rev
                       10    f = 0.25 mm/rev                             10
                  Ff (kN)                                          Ff (kN)  5
                       5
                                                                                          Vc = 70 m/min
                                       Vc = 70 m/min                                      f = 0.15 mm/rev
                                       f = 0.15 mm/rev
                       0    10  20  30  40  50  60  70                    0   10  20  30  40  50  60  70
                                 Drill dia. (mm)                                  Drill dia. (mm)
                                 Torque                                            Torque
                       0.5                                               0.5

                       0.4                                               0.4  Vc = 100 m/min
                             Vc = 100 m/min                                   f = 0.25 mm/rev
                       0.3   f = 0.25 mm/rev                             0.3
                  T (kNm)  0.2                                     T (kNm)  0.2


                       0.1                                               0.1              Vc = 70 m/min
                                         Vc = 70 m/min                                    f = 0.15 mm/rev
                                         f = 0.15 mm/rev
                                                                          0   10  20  30  40  50  60  70
                         0  10  20  30  40  50  60  70                            Drill dia. (mm)
                                 Drill dia. (mm)
                              Coolant pressure                                 Coolant pressure
                       10                                                2              1MPa = 1.0 N/mm 2
                                      1MPa = 1.0 N/mm 2                                 1Mpa ≈ 10 atm
                        8             1Mpa ≈ 10 atm                     1.5
                        6                                                1
                  P (MPa)  4                                       P (MPa)

                                                                        0.5
                        2
                                                                          0  10  20  30  40  50  60  70
                        0   10  20  30  40  50  60  70
                                 Drill dia. (mm)                                  Drill dia. (mm)
                              Coolant volume                                    Coolant volume
                      400                                               200
                                                                        150
                      300
                  q (l/min)  200                                   q (l/min)  100


                      100                                                50
                                                                          0   10  20  30  40  50  60  70
                        0   10  20  30  40  50  60  70                            Drill dia. (mm)
                                 Drill dia. (mm)
              The above values should not be used as the exact recommendations. They may need modification depending on the machining conditions, materials, etc.




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