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USER GUIDE
Material Groups Recommended Machining Conditions
SUMOCHAM
Feed vs. Drill Diameter
Tensile
Material Condition Strength Hardness Material V m/min INDEXABLE DRILLS
HB
No.
(1)
[N/mm ] D=4-4.9 D=5-5.9 D=6-7.9 D=8-9.9 D=10-11.9 D=12-13.9 D=14-15.9 D=16-19.9 D=20-25.9 D=26-32.9
2
ISO mm/rev
< 0.25 %C Annealed 420 125 1 80-110-140
≥ 0.25 %C Annealed 650 190 2 80-105-130
Non-alloy Quenched and
steel and cast < 0.55 %C 850 250 3 80-100-120 0.04 0.07 0.09 0.12 0.15 0.18 0.20 0.25 0.25 0.30
steel, free tempered 0.06 0.09 0.11 0.17 0.21 0.24 0.27 0.35 0.35 0.40
0.08 0.11 0.13 0.22 0.28 0.30 0.35 0.45 0.45 0.50
cutting steel Annealed 750 220 4 70-90-110
≥ 0.55 %C Quenched and 1000 300 5 50-70-90
tempered
Annealed 600 200 6 80-100-120
Low alloy and cast 0.04 0.07 0.09 0.12 0.14 0.16 0.18 0.23 0.25 0.30
P 930 275 7 70-90-110
steel (less than 5% of Quenched and 0.06 0.09 0.12 0.18 0.21 0.24 0.26 0.31 0.35 0.40
alloying elements) tempered 1000 300 8 50-70-90 0.08 0.11 0.15 0.25 0.28 0.32 0.35 0.40 0.45 0.50
1200 350 9 40-55-70
Annealed 680 200 10 50-70-90 0.06 0.07 0.09 0.12 0.12 0.15 0.18 0.20 0.22 0.25
High alloyed steel, cast
steel and tool steel Quenched and 1100 325 11 40-60-80 0.07 0.09 0.11 0.16 0.17 0.20 0.23 0.25 0.27 0.30
tempered 0.08 0.10 0.12 0.20 0.22 0.25 0.28 0.30 0.33 0.35
Ferritic/ 0.05 0.06 0.08 0.11 0.11 0.14 0.17 0.22 0.21 0.24
Stainless steel and cast steel martensitic 680 200 12 40-55-70 0.06 0.07 0.10 0.15 0.16 0.19 0.22 0.24 0.26 0.29
Martensitic 820 240 13 0.07 0.08 0.11 0.19 0.21 0.24 0.27 0.29 0.32 0.34
Ferritic /
pearlitic 180 15 90-125-160
Gray cast iron (GG)
Pearlitic /
martensitic 260 16 80-110-140 0.04 0.10 0.12 0.15 0.20 0.25 0.30 0.35 0.35 0.40
K Ferritic 160 17 90-135-180 0.06 0.13 0.15 0.22 0.27 0.32 0.37 0.45 0.47 0.50
Nodular cast iron (GGG) 0.08 0.15 0.18 0.30 0.35 0.40 0.45 0.55 0.60 0.60
Pearlitic 250 18 80-110-140
Ferritic 130 19 90-125-160
Malleable cast iron
Pearlitic 230 20 80-110-140
Recommended cutting data
(1) For workpiece materials list, see pages 495-524 . As a starting value, the middle of the recommended machining range should be used.
Then, according to the wear results, conditions can be changed to optimize performance.
The data refers to IC908
• When using external coolant supply only, reduce cutting speed by 10%
• When using more than 5XD drill ratio, reduce cutting parameters by 10%
No need to reduce the cutting parameters while using 8XD and up holders
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