Каталог Iscar сверла со сменной режущей частью 2022 - страница 135

ISO INDEXABLE DRILLS USER GUIDE • DR-DH drills can be used with any type of adaptation. Double-ended Pad However, concentric adapters such as hydraulic chucks Worn support pads provide poor surface finish in a drilled are advantageous for better runout. When machining hole. In this case, pads should be rotated or replaced. high temperature alloys or applying very high machining loads, it is advisable to use strong gripping adapters Rotate when wear shows on the back side of the pad such as: side lock adapters, power / hydraulic chucks. • In case of chip formation or chip evacuation problems, the following sequence is recommended: 1 Reduce cutting speed by 10% 2 Increase internal coolant pressure 3 Apply a pecking cycle 4 Interrupted cut will have a direct influence on hole accuracy, quality and drill life. (Sometimes even tool breakage can occur). DR-DH Machining Recommendations Material Condition Tensile Strength HardnessRm [N/mm2]HBMtl. No.CuttingSpeed vcm/minFeed mm/rev 0.1 - 0.25 %C Annealed0.25 - 0.25 %CAnnealed420650 125190 12 100-150 0.10-0.250.10-0.25 Non-alloy steeland cast steel,0.25 - 0.25 %CQuenched andtempered 850 250 3 0.15-0.30 free cutting steel 0.55 - 0.80 %C Annealed 750 220 4 0.15-0.30 80-150 P 0.55 - 0.80 %C Quenched andtempered 1000 300 5 0.15-0.30 Annealed 600 200 6 0.15-0.30 Low alloy and cast steel (lessthan 5% of alloying elements) 930 275 7 0.15-0.30Quenched andtempered1000300870-1200.15-0.30 1200 350 9 0.15-0.30 Annealed 680 200 10 80-150 0.10-0.25 High alloyed steel, caststeel and tool steelQuenched andtempered 1100 325 11 70-120 0.10-0.25 Ferritic / pearlitic 180 15 0.18-0.35 Grey cast iron (GG) Pearlitic / martensitic 260 16 180-300 0.18-0.35 K Ferritic 160 17 0.15-0.30 Nodular cast iron (GGG) PearliticMalleable cast ironFerritic 250130 1819 150-250 0.15-0.300.15-0.35 Pearlitic 230 20 0.15-0.35 133