Page 181 - ISCAR(HOLE_MAKING_CATALOG_65)
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USER GUIDE




          Troubleshooting
                  Problem                    Cause                                  Solution
           Chipping on the chisel edge   •  Poor clamping of the chuck  •  Check the clamping. Use hydraulic clamping chuck,
                                                                maxin power chuck or a shrink system.
                                 •  Unsuitable cutting conditions  •  Decrease feed, increase coolant pressure.
                                 •  Chisel runout             •  Check or replace the clamping adaptation.            SOLID CARBIDE DRILLS
                                 •  Workpiece movement        •  Increase workpiece chucking force.





             Chipping on the cutting   •  Poor clamping of the chuck  •  Check the clamping. Use hydraulic clamping chuck,
              edges / built-up edge                             maxin power chuck or a shrink system.
                                 •  Unsuitable cutting conditions  •  Increase cutting speed, reduce feed rate.
                                 •  Insufficient coolant      •  Check cooling lubricant. Increase coolant
                                                                pressure. In the case of external coolant supply,
                                                                improve jet direction and add cooling jets.
                                 •  Rough application         •  Reduce feed rate by 30-50% during entry and exiting.




             Excessive wear on the   •  Insufficient coolant   •  Check cooling lubricant. Increase coolant
                cutting corners                                 pressure. In the case of external coolant supply,
                                                                improve jet direction and add coolant jets.
                                 •  Large runout              •  Check if the runout is within 0.02 mm T.I.R. (radial & axial)
                                 •  Unsuitable cutting conditions  •  Reduce cutting speed, increase feed.
                                 •  Rough application         •  Reduce feed rate by 30-50% during entry and exit.
                                 •  Poor clamping of the chuck  •  Check the clamping. Use hydraulic clamping chuck,
                                                                maxin power chuck or a shrink system.

             Chipping on the lands  •  Workpiece movement     •  Increase workpiece chucking force.
                                 •  Insufficient coolant      •  Check cooling lubricant. Increase coolant
                                                                pressure. In the case of external coolant supply,
                                                                improve jet direction and add coolant jets.
                                 •  Wrong drill               •  Check drill type, drilling depth, cooling
                                                                system and workpiece material.
                                 •  Unsuitable cutting conditions  •  Increase feed. When spot drilling, reduce feed.
           Hole diameter out of tolerance •  Unsuitable cutting conditions  •  If hole size is too large, increase cutting speed or reduce feed.
                                                                If hole size is too small, reduce cutting speed or increase feed.
                                 •  Poor clamping of the chuck  •  Check the clamping. Use hydraulic clamping chuck,
                                                                maxin power chuck or a shrink system.
                                 •  Large runout              •  Make sure that the drill’s runout is within
                                                                0.02 mm (radial & axial).
                                 •  Worn out center point (chisel)  •  Regrind cutting edge or replace the drill.

               Hole not straight  •  Insufficient chip evacuation  •  Use pecking cycle.
                                 •  Poor clamping of the chuck  •  Check the clamping. Use hydraulic clamping chuck,
                                                                maxin power chuck or a shrink system.
                                 •  Workpiece rigidity        •  Increase workpiece chucking force.
                                 •  Worn out drill center point (chisel)  •  Regrind cutting edge.
                                 •  Unsuitable cutting conditions  •  Increase feed. When spot drilling, reduce feed.




















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