ISO THREAD MILLING TOOLS USER GUIDE Machining Data for Indexable Insert Threading Tools Indexable Cutting Tensile Strength Hardness Material Speed for IC908 Material Condition [N/mm2] HB No. m/min < 0.25 %C Annealed 420 125 1 100-200 Non-alloy steel ≥ 0.25 %C Annealed 650 190 2 95-190 and cast steel, < 0.55 %C Quenched and tempered 850 250 3 90-180 free cutting steel ≥ 0.55 %C Annealed 750 220 4 90-170 Quenched and tempered 1000 300 5 80-150 Annealed 600 200 6 120-170 P Low alloy and cast steel (less 930 275 7 115-160 than 5% of alloying elements) Quenched and tempered 1000 300 8 105-150 1200 350 9 90-140 High alloyed steel, cast Annealed 680 200 10 90-170 steel and tool steel Quenched and tempered 1100 325 11 75-145 Stainless steel and cast steel Ferritic/martensiticMartensitic 680 200 12 110-17082024013100-160 M Stainless steel Austenitic, duplex 600 180 14 90-145 Grey cast iron (GG) Ferritic/pearliticPearlitic /martensitic 160 17 65-1352501865-110 K Cast iron nodular (GGG) Ferritic Pearlitic 180 15 65-1352601660-100 Malleable cast iron FerriticPearlitic 130 19 65-1352302060-120 Not hardenable 60 21 110-260 Aluminum- wrought alloy Hardenable 100 22 110-200 =<12% Si Not hardenable 75 23 145-350 Aluminum-cast, alloyed Hardenable 90 24 145-275 N >12% Si High temperature>1% PbFree cutting 130 25 95-22511026145-350 Copper alloys Brass 90 27 145-350 Electrolytic copper 100 28 145-350 Duroplastics, fiber plastics 29 90-370 Non-metallic Hard rubber 30 80-330 Fe based Annealed 200 31 20-60 Hardened 280 32 20-50 High temperaturealloys Annealed 250 33 20-30 S Ni or Co based Hardened 350 34 10-20 Cast 320 35 15-25 Titanium alloys 400Alpha+beta alloys, hardened105036 30-903720-70 Hardened steelHChilled cast iron HardenedHardenedCast 55 HRC 38 25-6060 HRC3920-404004025-60 Cast iron Hardened 55 HRC 41 20-50 Calculating RPM: Metric Example: V=120 m/min, D=30 mm n n= Vc x 1000πxD = 120 x 1000 3.14x30 = 1274 RPM Inch Example: V= 410 SFM, D=1.5 inch Vc D n = Vc x 12πxD = 410 x 123.14x1.5= 1045 RPM Feed: 0.05-0.15 mm/tooth 0.002-0.006 inch/tooth 435