Threading Technology – Clamping Technology 520

428 Twist Drills VA STEEL Accessories 3 x D 5 x D 6 x D Tech. Info v c / f Product Finder 8 x D 2-3.5 x D 5.13 Problems, possible causes and solutions in drilling Problem: • Built-up edge on the primary cutting edge Possible causes: • Wrong cutting data • Excessive wear on relief surfaces • Damage on the cutting edges • Bad coolant supply Solutions: • Use coolant-lubricant with higher oil content, or additives • Increase cutting speed • Reduce feed • Exchange tools Problem: • Splintering on the chisel edge Possible causes: • Vibrations • Concentricity run-out > 0.02 mm • Rough or slanted workpiece surface Solutions: • Reduce feed • Use a different clamping tool • Improve workpiece surface (e.g. by spot-facing)