Page 179 - ISCAR(HOLE_MAKING_CATALOG_65)

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Recommended Machining Conditions for Solid Carbide Drills D=0.8-2.9 mm
Tensile Hardness Material Cutting Feed (mm/rev) vs. Drill Diameter
Material Condition Strength Speed Vc
ISO [N/mm ] HB No. (1) (m/min) Ø0.8-1.4 Ø1.5-1.9 Ø2-2.4 Ø2.5-2.9
2
< 0.25 %C Annealed 420 125 1 50-100 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
>= 0.25 %C Annealed 650 190 2 40-100 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Non-alloy Quenched and SOLID CARBIDE DRILLS
steel and cast < 0.55 %C tempered 850 250 3 40-85 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
steel, free
cutting steel >= 0.55 %C Annealed 750 220 4 40-85 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Quenched and 1000 300 5 40-85 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
tempered
Annealed 600 200 6 40-75 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
P Low alloy and cast steel (less 930 275 7 40-60 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
than 5% of alloying elements) Quenched and 1000 300 8 40-60 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
tempered
1200 350 9 40-60 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Annealed 680 200 10 30-50 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
High alloyed steel, cast
steel and tool steel Quenched and 1100 325 11 30-50 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
tempered
Ferritic/ 680 200 12 20-35 0.03-0.06 0.04-0.08 0.05-0.10 0.06-0.10
Stainless steel and cast steel martensitic
Martensitic 820 240 13 20-35 0.03-0.06 0.04-0.08 0.05-0.10 0.06-0.10
M Stainless steel Austenitic 600 180 14 20-35 0.03-0.06 0.04-0.08 0.05-0.10 0.06-0.10
Ferritic/pearlitic 180 15 40-80 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Grey cast iron (GG)
Pearlitic 260 16 40-70 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Ferritic 160 17 40-95 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
K Nodular cast iron (GGG)
Pearlitic 250 18 50-95 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Ferritic 130 19 40-80 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Malleable cast iron
Pearlitic 230 20 40-80 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Not cureable 60 21 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Aluminum- wrought alloy
Cured 100 22 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
<=12% Si Not cureable 75 23 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Aluminum- Cured 90 24 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
cast, alloyed
>12% Si High temperature 130 25 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
N >1% Pb Free cutting 110 26 80-150 0.03-0.10 0.05-0.15 0.07-0.17 0.08-0.20
Copper alloys Brass 90 27 50-150 0.05-0.12 0.07-0.15 0.08-0.18 0.09-0.18
Electrolitic copper 100 28 60-160 0.05-0.15 0.07-0.18 0.08-0.20 0.09-0.22
Duroplastics, 29
fiber plastics
Non-metallic
Hard rubber 30

Fe based Annealed 200 31 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08
Cured 280 32 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08
High temp. Annealed 250 33 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08
alloys Ni or Co
S based Cured 350 34 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08
Cast 320 35 10-20 0.02-0.04 0.03-0.06 0.04-0.07 0.04-0.08
RM 400 36 10-20 0.02-0.03 0.02-0.03 0.03-0.04 0.03-0.04
Titanium Ti alloys Alpha+beta
alloys cured RM 1050 37 10-20 0.02-0.03 0.02-0.03 0.03-0.04 0.03-0.04
Hardened 55 HRC 38 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03
Hardened steel
H Hardened 60 HRC 39 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03
Chilled cast iron Cast 400 40 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03
Cast iron Hardened 55 HRC 41 10-20 0.01-0.02 0.01-0.02 0.02-0.03 0.02-0.03
• For drill with lengh to diameter ratio larger than 6xD, reduce feed by 20%
• If the RPM exceeds 10,000, a dynamic balance should be done to the system
• Maximal radial and axial runout should not exceed 0.01 mm
• As a starting value, the middle of the recommended machining range should be used, then (according to wear results),
conditions can be changed in order to optimize performance.
(1) For workpiece materials list, see pages 495-524

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