Page 172 - ISCAR(HOLE_MAKING_CATALOG_65)
P. 172

SOLID CARBIDE DRILLS
                                                                   OAL

          SCD-ACP-CS (20xD)                                     LCF                LS
          Solid Carbide Drills with                 L5          LU                      DCONMSh6  DCh8
          Coolant Holes for Automotive
          Crankshaft Applications,          140º   PL
          Drilling Depth 20-22xD                                                                            MQL


                                                                Dimensions



                                                                                                             IC908
           Designation           DC       LU       LCF       OAL     DCONMS      PL       LS       L5 (1)
           SCD 050-103-060ACP-CS  5.00    103.0    118.0    156.00     6.00     0.910     38.0     40.00    •
           SCD 060-120-060ACP-CS  6.00    120.0    140.0    178.00     6.00     1.090     38.0     40.00    •
          •  For user guide, see pages 175-184
          (1)  Up to 50% of this length may be used to regrind
           Recommended Drilling Procedure
           for Deep Hole Drilling (20XD)              1
          1  Drill a pilot hole 1-2*D deep with a short drill. The pilot
           drill should be 0.03-0.05 mm larger than the long drill
           and its point angle should also be larger (over 140°).  2
          2  Enter the pre-hole using low speed and
           feed, until it engages the material.
          3  Increase cutting speed and feed to recommended   3
           conditions – no pecking is required!
          4  After having reached the required depth, reduce speed
           by more than 50% while retracting from the hole.
                                                      4


           Recommended Machining Conditions for Solid Carbide 20xD Drills
                           Carbon Steel       Alloy Steel      Stainless Steel    Cast Iron     Ductile Cast Iron
                             (30 HRc)         (45 HRc)                            (GG25)            (GG45)
             Drill Dia. (mm)  V(m/min)  f(mm/rev)  V(m/min)  f(mm/rev)  V(m/min)  f(mm/rev)  V(m/min)  f(mm/rev)  V(m/min)  f(mm/rev)
                 5        60-120  0.12-0.25  50-100  0.1-0.20  30-60  0.08-0.15  60-120  0.15-0.30  40-80  0.15-0.25
                 6        60-120  0.14-0.25  50-100  0.14-0.25  30-60  0.10-0.18  60-120  0.14-0.25  40-80  0.14-0.25
                7-8       60-120  0.16-0.30  50-100  0.16-0.30  30-60  0.10-0.20  60-120  0.16-0.30  40-80  0.16-0.30
               9-10       60-120  0.16-0.30  50-100  0.10-0.20  30-60  0.08-0.115  60-120  0.20-0.35  40-80  0.20-0.35











































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