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120 ISCAR GENERAL PURPOSE DRILLINGMULTI-FUNCTION TOOLSTroubleshootingChipping caused by built-up edge1 Increase cutting speed.2 Reduce feed.3 Check tool and workpiece rigidity.4 Reduce tool and workpiece overhang.Excessive flank wear1 Reduce cutting speed.2 Use a harder grade (special).3 Increase coolant flow.4 Check cutting edge height.Edge deformation1 Reduce cutting speed.2 Use a harder grade (special).3 Increase coolant flow.4 Reduce feed.Poor surface quality1 Reduce feed.2 Increase coolant flow.3 Check tool and workpiece rigidity.4 Increase cutting speed.Long chips1 Increase feed.2 Reduce cutting speed.3 Increase coolant flow.Tight chipsReduce feedVibrations1 Check tool and workpiece rigidity.2 Reduce tool and workpiece overhang.3 Reduce cutting speed.4 Increase feed.5 Check cutting edge height.6 Reduce feed and increase cutting speed on very soft materials.

