Каталог Iscar сверла ружейные и для глубокого сверления 2022 - страница 125

USER GUIDE GUNDRILLS Gundrill Troubleshooting Guide Possible Causes A gap between bushing and workpiece Head outside angle excessive wear Head inside angle excessive wear Material shrinking due to heat Workpiece thin wall section Rough cutting edge finish Too small flute clearance Loss of coolant pressure Insufficient coolant flow Too short carbide head Spindle speed too high Spindle speed too low Worn supporting pads Incorrect coolant type High coolant pressure Incorrect head angles Low coolant pressure Interrupted chip flow Overheating coolant Incorrect drill profile Oversized bushing Insufficent coolant Bushing undersize Material structure Feed fluctuations Undersized hole Worn out edge Poor clamping Tool heal drag Too high feed Built up edge Misalignment Too low feed Vibrations Hole Problems Oversize + + + + + + ++ + + + + + + + + + Undersize + + ++ + + + + + Rough surface finish + + + + + + + + + + + ++ + + + + + + + + + Runout + + + + + + + + + + + + ++ + + + + + + + + + + Conical entrance + + + + + + Curved hole axis + + + + + + + + + + + + + + + + + + + Drill Problems Breakage + + + + + + + + + + + + + + + + + + + + + + + + + + Chipping + + + + + + + + + Poor drill life + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + Excessive margin wear + + + + + + + + + + + + + Excessive corner wear + + + + + + + + + + + + + + Excessive flank wear + + + + + + + + + + + + + + Drill heat + + + + + + + + + + + + Flute bending + + + + + + + + + + + + + + + + Damaged wear pad + + + + + + + + + + + + + + + + + + Built-up edge + + + + + + + + + + + + + + + Cratering + + + + + + + + + + + + + 309