Page 77 - HOLE MAKING CATALOG p001-148

USER GUIDE
ISO
D=12-13.9Material Groups
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
Recommended Machining Conditions

Feed vs. Drill Diameter

Material Condition Tensile Hardness Mtl. VC mm/rev
Annealed Strength HB No. m/min
Non-alloy steel Annealed
and cast steel, Quenched and Rm
free cutting steel tempered [N/mm2]

P < 0.25 %C Annealed 420 125 1
≥ 0.25 %C
< 0.55 %C Quenched and 650 190 2 80-100-120 0.30 0.36 0.45 0.48 0.51 0.54 0.57
tempered 0.39 0.45 0.51 0.57 0.60 0.63 0.66
≥ 0.55 %C Annealed 850 250 3

Quenched and 750 220 4 70-85-100 0.45 0.51 0.57 0.63 0.66 0.69 0.72
tempered
1000 300 5 50-65-80
Annealed
Low alloy and cast steel (less Quenched and 600 200 6 70-90-110 0.33 0.36 0.39 0.42 0.45 0.48 0.51
than 5% of alloying elements) 930 275 7 70-85-100
tempered 1000 300 8 50-65-80 0.39 0.42 0.48 0.51 0.54 0.57 0.60
1200 350 9 40-50-60 0.42 0.48 0.54 0.60 0.63 0.66 0.69
Ferritic / pearlitic 680
High alloyed steel, cast Pearlitic / 200 10 50-70-90 0.27 0.30 0.33 0.36 0.39 0.42 0.45
steel and tool steel martensitic 1100
Ferritic 325 11 40-60-80 0.33 0.36 0.39 0.42 0.45 0.48 0.51
0.36 0.39 0.42 0.45 0.48 0.51 0.54
Pearlitic
180 15 90-125-140
Ferritic
Gray cast iron (GG) 260 16 80-110-120
K Nodular cast iron (GGG) Pearlitic
160 17 90-135-160 0.40 0.45 0.54 0.60 0.66 0.72 0.78
Malleable cast iron 0.60 0.66 0.72 0.78 0.84 0.90 0.96

Recommended cutting data 250 18 80-110-120 0.78 0.84 0.90 0.96 1.02 1.08 1.14

130 19 90-125-140

230 20 80-110-120

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