Page 77 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE

Material Groups Recommended Machining Conditions

Feed vs. Drill Diameter

Tensile D=12-13.9 D=14-15.9 D=16-17.9 D=18-19.9 D=20-21.9 D=22-23.9 D=24-25.9 INDEXABLE DRILLS
Strength
Rm Hardness Mtl. VC
ISO Material Condition [N/mm ] HB No. m/min mm/rev
2
< 0.25 %C Annealed 420 125 1
≥ 0.25 %C Annealed 650 190 2 80-100-120
Non-alloy steel < 0.55 %C Quenched and 850 250 3 0.30 0.36 0.45 0.48 0.51 0.54 0.57
and cast steel, tempered 0.39 0.45 0.51 0.57 0.60 0.63 0.66
free cutting steel Annealed 750 220 4 70-85-100 0.45 0.51 0.57 0.63 0.66 0.69 0.72
≥ 0.55 %C Quenched and 1000 300 5 50-65-80
P tempered
Annealed 600 200 6 70-90-110
Low alloy and cast steel (less Quenched and 930 275 7 70-85-100 0.33 0.36 0.39 0.42 0.45 0.48 0.51
0.39
0.42
0.57
0.54
0.60
0.48
0.51
than 5% of alloying elements) 1000 300 8 50-65-80
tempered 0.42 0.48 0.54 0.60 0.63 0.66 0.69
1200 350 9 40-50-60
Annealed 680 200 10 50-70-90 0.27 0.30 0.33 0.36 0.39 0.42 0.45
High alloyed steel, cast
steel and tool steel Quenched and 1100 325 11 40-60-80 0.33 0.36 0.39 0.42 0.45 0.48 0.51
tempered 0.36 0.39 0.42 0.45 0.48 0.51 0.54
Ferritic / pearlitic 180 15 90-125-140
Gray cast iron (GG) Pearlitic /
martensitic 260 16 80-110-120 0.40 0.45 0.54 0.60 0.66 0.72 0.78
K Nodular cast iron (GGG) Ferritic 160 17 90-135-160 0.60 0.66 0.72 0.78 0.84 0.90 0.96
Pearlitic 250 18 80-110-120 0.78 0.84 0.90 0.96 1.02 1.08 1.14
Ferritic 130 19 90-125-140
Malleable cast iron
Pearlitic 230 20 80-110-120
Recommended cutting data

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