Material Groups Recommended Machining Conditions

SUMOCHAM
Feed vs. Drill Diameter

D=10-11.9

D=12-13.9

D=14-15.9

D=16-19.9

D=20-25.9

D=26-32.9
D=5-5.9

D=6-7.9

D=8-9.9
D=4-4.9
Tensile
Strength Hardness
ISO Material Condition [N/mm2] HB Vc m/min mm/rev
< 0.25 %C Annealed 420 125 80-110-140

Non-alloy steel >= 0.25 %C Annealed 650 190 80-105-130 0.04 0.07 0.09 0.12 0.15 0.18 0.20 0.25 0.25 0.30
and cast steel, < 0.55 %C Quenched and tempered 850 250 80-100-120 0.06 0.09 0.11 0.17 0.21 0.24 0.27 0.35 0.35 0.40
free cutting steel >= 0.55 %C Annealed 750 220 70-90-110 0.08 0.11 0.13 0.22 0.28 0.30 0.35 0.45 0.45 0.50
Quenched and tempered 1000 300 50-70-90
Annealed 600 200 80-100-120
Low alloy steel and cast steel 0.04 0.07 0.09 0.12 0.14 0.16 0.18 0.23 0.25 0.30
P 930 275 70-90-110
(less than 5% of alloying 0.06 0.10 0.12 0.18 0.21 0.24 0.26 0.31 0.35 0.40
elements) Quenched and tempered 1000 300 50-70-90
0.08 0.13 0.15 0.25 0.28 0.32 0.35 0.40 0.45 0.50
1200 350 40-55-70
High alloyed steel, cast steel Annealed 680 200 50-70-90 0.06 0.07 0.09 0.12 0.12 0.15 0.18 0.20 0.22 0.25
and tool steel Quenched and tempered 1100 325 40-60-80 0.07 0.09 0.11 0.16 0.17 0.20 0.23 0.25 0.27 0.30
Stainless steel and Ferritic/martensitic 680 200 40-55-70 0.05 0.06 0.08 0.10 0.12 0.14 0.16 0.16 0.18 0.20
cast steel Martensitic 820 240 40-55-70 0.06 0.07 0.09 0.12 0.15 0.17 0.20 0.21 0.24 0.27
0.05 0.06 0.08 0.10 0.12 0.14 0.16 0.16 0.18 0.20
M Stainless steel and cast steel Austenitic 600 180 30-50-70 0.06 0.07 0.09 0.12 0.15 0.17 0.20 0.21 0.24 0.27
0.07 0.08 0.10 0.15 0.18 0.20 0.24 0.26 0.30 0.35
Ferritic/pearlitic 180 90-125-160
Grey cast iron (GG)
Pearlitic / martensitic 260 80-110-140
0.04 0.10 0.12 0.15 0.20 0.25 0.30 0.35 0.35 0.40
Ferritic 160 90-135-180
K Nodular cast iron (GGG) 0.06 0.13 0.15 0.22 0.27 0.32 0.37 0.45 0.47 0.50
Pearlitic 250 80-110-140
0.08 0.15 0.18 0.30 0.35 0.40 0.45 0.55 0.60 0.60
Ferritic 130 90-125-160
Malleable cast iron
Pearlitic 230 80-110-140
Aluminum- Not hardenable 60
wrought alloys Hardenable 100
90-155-220
<=12% Si Not hardenable 75
Aluminum-cast 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Hardenable 90
N alloys 0.27 0.32 0.37 0.42 0.50 0.57 0.67
>12% Si High temperature 130 80-120-160
0.35 0.40 0.45 0.50 0.60 0.70 0.75
>1% Pb Free cutting 110
Copper alloys Brass 90 90-155-220
Electrolytic copper 100
Fe based Annealed 200 30-45-60
Hardened 280 0.05 0.06 0.08 0.10 0.12 0.12 0.14 0.16
High temperature
Annealed 250 20-35-50 0.06 0.08 0.10 0.12 0.15 0.16 0.18 0.20
alloys Ni or Co
S Hardened 350 0.07 0.11 0.13 0.15 0.18 0.20 0.22 0.25
based
Cast 320
400 0.05 0.06 0.08 0.10 0.12 0.14 0.16 0.18
Titanium alloys 20-35-50
Alpha+beta alloys, hardened 1050 0.06 0.09 0.11 0.14 0.16 0.18 0.20 0.22

Hardened 55 HRC 0.05 0.06 0.08 0.10 0.12 0.14 0.16 0.18
H Hardened steel 20-35-50 0.06 0.09 0.11 0.14 0.16 0.18 0.20 0.22
Hardened 60 HRC 0.07 0.12 0.15 0.18 0.20 0.22 0.25 0.27
Recommended cutting data
• When using external coolant supply only, reduce cutting speed by 10%. As a starting value, the middle of the recommended machining range should be used.
• Use internal coolant supply when machining austenitic stainless steel. Then, according to the wear results, conditions can be changed to optimize performance.
• When using more than 5XD drill ratio, reduce cutting parameters by 10%. The data refers to IC908