USER GUIDE THREAD MILLING TOOLS Machining Data for Indexable Threading Tools Indexable Cutting Tensile Strength Hardness Material Material Condition Speed for IC908 [N/mm2] HB No. ISO 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 ferritic/martensitic 680 200 12 110-170 stainless steel and cast steel martensitic 820 240 13 100-160 M stainless steel austenitic, duplex 600 180 14 90-145 ferritic/pearlitic 160 17 65-135 grey cast iron (GG) pearlitic /martensitic 250 18 65-110 ferritic 180 15 65-135 K cast iron nodular (GGG) pearlitic 260 16 60-100 ferritic 130 19 65-135 malleable cast iron pearlitic 230 20 60-120 not hardenable 60 21 110-260 aluminum- wrought alloy hardenable 100 22 110-200 =<12% Si not hardenable 75 23 145-350 aluminum- hardenable 90 24 145-275 cast, alloyed >12% Si high temperature 130 25 95-225 N >1% Pb free cutting 110 26 145-350 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 annealed 200 31 20-60 Fe based hardened 280 32 20-50 high temperature annealed 250 33 20-30 alloys S Ni or Co based hardened 350 34 10-20 cast 320 35 15-25 400 36 30-90 titanium alloys alpha+beta alloys, hardened 1050 37 20-70 hardened 55 HRC 38 25-60 hardened steel hardened 60 HRC 39 20-40 H chilled cast iron cast 400 40 25-60 cast iron hardened 55 HRC 41 20-50 Calculating RPM: Metric Example: V=120 m/min, D=30 mm Vc x 1000 120 x 10 00 n n= πxD = 3.14x30 = 1274 RPM Inch Example: V= 410 SFM, D=1.5 inch Vc x 12 410 x 12 Vc n= πxD = 3.14x1.5 = 1045 RPM D Feed: 0.05-0.15 mm/tooth 0.002-0.006 Inch/tooth 497