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P. 600

USER GUIDE
       SOLID CARBIDE DRILLS



            Regrinding Instructions for SCDT Pre-Thread Solid Drills

                For each grinding operation, rotate the drill
                180° and repeat the grinding procedure.
                                                                                       45∞
                                                                                               7∞ spiral relief







                 1

                                                   a°  D Range
                                                   7    0.8-6.0
                                                   10    >6.1
                    Primary Clearance









                 2





                    Secondary Clearance









                 3



                                                                                                a° D Range
                                                                                                100  3.0-4.8
                                                                                                105  4.9-10
                    Chisel
                                                                                                95  10.1-20








                 4


                                                                                                R D Range
                                                                                                0.02  0.8-6.0
                                                                                                0.03 6.1-18.0
                    Edge Preparation
                                                                                                0.04 18.1>UP
                Grinding Wheel Recommended Specifications:   3.  Grit size: 325/400 mesh (45/38µ)
             1.  Diameter grinding wheel: GA2               4.  Diamond concentration: C-75 (3.3 carat/cm3)
             2.  Grinding wheel bond: synthetic resin       5.  Cutting fluid emulsion 3%








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