Page 182 - Demo

180 ISCAR PRE-THREAD DRILLING WITH CHAMFERING SOLID-DRILL Machining ConditionsRecommended Machining Conditions for Solid Carbide Drills D=0.8-2.9 mmISOMaterial Condition Tensile Strength [N/mm2]Hardness HBMaterial No.(1)Cutting Speed Vc(m/min)Feed (mm/rev) Vs. Drill Diameter%u00d80.8-1.4 %u00d81.5-1.9 %u00d82-2.4 %u00d82.5-2.9Pnon-alloy steel and cast steel, free cutting steel<0.25% C annealed 420 125 1 50-100 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20%u22650.25% C annealed 650 190 2 40-100 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20<0.55% C quenched and tempered 850 250 3 40-85 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20%u22650.55% C annealed 750 220 4 40-85 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20quenched and tempered 1000 300 5 40-85 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20low alloy and cast steel (less than 5% of alloying elements)annealed 600 200 6 40-75 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20quenched and tempered930 275 7 40-60 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.201000 300 8 40-60 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.201200 350 9 40-60 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20high alloyed steel, cast steel and tool steelannealed 680 200 10 30-50 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20quenched and tempered 1100 325 11 30-50 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20stainless steel and cast steelferritic / martensitic 680 200 12 20-35 0.03-0.06 0.04-0.08 0.05-0.10 0.06-0.10martensitic 820 240 13 20-35 0.03-0.06 0.04-0.08 0.05-0.10 0.06-0.10M stainless steel and cast steel austenitic, duplex 600 180 14 20-35 0.03-0.06 0.04-0.08 0.05-0.10 0.06-0.10Kgray cast iron (GG) ferritic / pearlitic 180 15 40-80 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20pearlitic / martensitic 260 16 40-70 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20nodular cast iron (GGG) ferritic 160 17 40-95 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20pearlitic 250 18 50-95 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20malleable cast ironferritic 130 19 40-80 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20pearlitic 230 20 40-80 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20Naluminum-wrought alloysnot hardenable 60 21 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20hardenable 100 22 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20aluminumcast alloys%u226412% Sinot hardenable 75 23 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20hardenable 90 24 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20>12% Si high temperature 130 25 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20copper alloys>1% Pb free cutting 110 26 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20brass 90 27 50-150 0.05-0.12 0.07-0.15 0.08-0.18 0.09-0.18electrolytic copper 100 28 60-160 0.05-0.15 0.07-0.18 0.08-0.20 0.09-0.22non metallicduroplastics, fiber plastics 29hard rubber 30Shigh temperature alloysFe basedannealed 200 31 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08hardened 280 32 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08Ni or Co basedannealed 250 33 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08hardened 350 34 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08cast 320 35 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08titanium alloys pure RM 400 36 10-20 0.02-0.03 0.02-0.03 0.03-0.04 0.03-0.04alpha+beta alloys, hardened RM 1050 37 10-20 0.02-0.03 0.02-0.03 0.03-0.04 0.03-0.04Hhardened steelhardened 55 HRC 38 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03hardened 60 HRC 39 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03chilled cast iron cast 400 40 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03cast iron hardened 55 HRC 41 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03%u2022 For drill with lengh to diameter ratio larger than 6xD, reduce feed by 20%%u2022 If the RPM exceeds 10,000, a dynamic balance should be done to the system%u2022 Maximal radial and axial runout should not exceed 0.01 mm%u2022 As a starting value, the middle of the recommended machining range should be used, then (according to wear results), conditions can be changed in order to optimize performance.