Page 93 - Demo

91GENERAL PURPOSE DRILLINGCHAM-DRILLMaterial Groups Recommended Machining ConditionsISOMaterial Condition Tensile Strength [N/mm2] Hardness HB Material No. Cutting Speed Vc m/minFeed vs. Drill Diameter mm/revD=6.8-10.9 D=11-12.9 D=13-14.9 D=15-16.9 D=17-20.9 D=21-25.9Pnon-alloy steel and cast steel, free cutting steel<0.25% C annealed 420 125 1 50-1300.12-0.2 0.15-0.25 0.2-0.3 0.25-0.35 0.25-0.45 0.25-0.45%u22650.25% C annealed 650 190 2 100-120<0.55% C quenched and tempered 850 250 3 90-110%u22650.55% Cannealed 750 220 4 90-120quenched and tempered 1000 300 5 70-90low alloy and cast steel (less than 5% of alloying elements)annealed 600 200 6 80-130quenched and 0.12-0.2 0.15-0.25 0.2-0.3 0.25-0.35 0.3-0.4 0.3-0.45tempered930 275 7 70-1101000 300 8 60-901200 350 9 40-70high alloyed steel, cast steel and tool steelannealed 680 200 10 50-80quenched and 0.12-0.2 0.12-0.22 0.15-0.25 0.2-0.28 0.25-0.33 0.25-0.35tempered 1100 325 11 40-70stainless steel and cast steelferritic / martensitic 680 200 12 20-50 0.08-0.14 0.12-0.22 0.12-0.15 0.14-0.20 0.16-0.24 0.15-0.28martensitic 820 240 13M stainless steel and cast steelaustenitic, duplex 600 180 14 20-50 0.08-0.14 0.12-0.22 0.12-0.15 0.14-0.20 0.16-0.24 0.15-0.28Kgray cast iron (GG) ferritic / pearlitic 180 15 90-1400.2-0.3 0.25-0.35 0.3-0.4 0.35-0.45 0.4-0.5 0.4-0.6pearlitic / martensitic 260 16 80-130nodular cast iron (GGG) ferritic 160 17 100-180pearlitic 250 18 90-160malleable cast iron ferritic 130 19pearlitic 230 20Naluminum-wrought alloys not hardenable 60 21 90-160hardenable 100 22 80-120 0.2-0.35 0.25-0.4 0.3-0.45 0.35-0.5 0.4-0.6 0.4-0.65aluminumcast alloys%u226412% Si not hardenable 75 23 90-160 hardenable 90 24>12% Si high temperature 130 25copper alloys>1% Pb free cutting 110 26brass 90 27electrolytic copper100 28non metallicduroplastics, fiber plastics 29hard rubber 30Shigh temperature alloysFe based annealed 200 31 30-50 0.05-0.1 0.08-0.13 0.1-0.15 0.12-0.18 0.12-0.2 0.12-0.22 hardened 280 32 20-40Ni or Co basedannealed 250 33 20-50 0.06-0.12 0.09-0.15 0.12-0.18 0.15-0.2 0.15-0.23 0.15-0.25hardened 350 34cast 320 35titanium alloyspure 400 36alpha+beta alloys, hardened 1050 37Hhardened steel hardened 55 HRC 38 20-50 0.06-0.12 0.09-0.15 0.12-0.18 0.15-0.2 0.15-0.23 0.15-0.25hardened 60 HRC 39chilled cast iron cast 400 40 20-50 0.06-0.12 0.09-0.15 0.12-0.18 0.15-0.2 0.15-0.23 0.15-0.25cast iron hardened 55 HRC 41%u2022 When using external coolant supply only, reduce cutting speed by 10% %u2022 When using more than 5XD drill ratio, reduce cutting parameters by 10% As a starting value, the middle of the recommended machining range should be used. Then, according to the wear results, conditions can be changed to optimize performance. The data refers to IC908. For IC1008, cutting speed should be increased by 15%.