Page 30 - HOLE MAKING CATALOG p149-184

SOLID CARBIDE DRILLS USER GUIDE
ISO
Recommended Machining Conditions for Solid Carbide Drills D=3.0-20.0 mm

Material Condition Tensile Hardness Material Cutting Feed (mm/rev) vs. Drill Diameter
Strength HB No.(1) Speed Vc Ø3-5 Ø5.1-8 Ø8.1-12 Ø12.1-16 Ø16.1-20
[N/mm2]
m/min

< 0.25 %C Annealed 420 125 1 80-120 0.10-0.18 0.15-0.25 0.2-0.30 0.20-0.35 0.25-0.40

>= 0.25 %C Annealed 650 190 2 80-110 0.10-0.18 0.15-0.25 0.2-0.30 0.20-0.35 0.25-0.40

Non-alloy Quenched

steel and < 0.55 %C and 850 250 3 70-100

cast steel, tempered 750 220 4 0.10-0.20 0.15-0.28 0.2-0.35 0.20-0.38 0.25-0.42
free cutting >= 0.55 %C 1000 300 5
steel Annealed

Quenched
and

tempered

P Low alloy and cast Annealed 600 200 6 70-90 0.10-0.18 0.15-0.25 0.2-0.30 0.20-0.35 0.25-0.40
steel (less than 5% of 930 275 7
alloying elements) Quenched 1000 300
and 1200 350 8 60-80 0.10-0.18 0.15-0.25 0.2-0.30 0.20-0.35 0.25-0.40

tempered 9 50-70 0.10-0.20 0.15-0.28 0.2-0.35 0.20-0.38 0.25-0.42

Annealed 680 200 10 60-80 0.10-0.20 0.15-0.28 0.18-0.35 0.20-0.38 0.25-0.42

High alloyed steel, cast Quenched 1100 325 11 50-70 0.10-0.15 0.12-0.20 0.14-0.25 0.16-0.30 0.18-0.32
steel and tool steel and

tempered

Stainless steel Ferritic/ 680 200 12 25-75 0.04-0.10 0.05-0.15 0.05-0.18 0.08-0.20 0.10-0.20
and cast steel martensitic

Martensitic 820 240 13 25-75 0.04-0.10 0.05-0.15 0.05-0.18 0.08-0.20 0.10-0.20

M Stainless steel Austenitic 600 180 14 25-75 0.04-0.10 0.05-0.15 0.05-0.18 0.08-0.20 0.10-0.20

Grey cast iron (GG) Ferritic/ 180 15 85-105 0.15-0.25 0.20-0.35 0.25-0.45 0.30-0.50 0.35-0.55
pearlitic

Pearlitic 260 16 75-90 0.15-0.25 0.20-0.35 0.25-0.45 0.30-0.50 0.35-0.55

K Nodular cast iron (GGG) Ferritic 160 17
Malleable cast iron Pearlitic
Ferritic 250 18 65-80 0.12-0.20 0.15-0.25 0.20-0.35 0.25-0.40 0.30-0.45
Pearlitic 130 19

230 20

Aluminum- wrought alloy Not cureable 60 21 70-300 0.10-0.25 0.15-0.35 0.25-0.45 0.30-0.50 0.35-0.55
Cured 100 22 70-200

Aluminum- <=12% Si Not cureable 75 23 70-300 0.07-0.18 0.12-0.25 0.20-0.35 0.25-0.45 0.30-0.50
cast, >12% Si 90 24
alloyed Cured
130 25
High
temperature

N >1% Pb Free cutting 110 26

Copper Brass 90 27

alloys Electrolitic 100 28
copper

Non-metallic Duroplastics, 29
fiber plastics

Hard rubber 30

Fe based Annealed 200 31

High temp. Cured 280 32
Annealed 250 33
alloys Ni or Co 350 34
Cured 320 35
S based Cast

RM 400 36

Titanium Ti alloys Alpha+beta RM 1050 37 15-35 0.02-0.07 0.04-0.10 0.06-0.12 0.08-0.15 0.08-0.18
alloys cured

Hardened steel Hardened 55 HRC 38 40-70 0.06-0.10 0.08-0.12 0.10-0.14 0.12-0.16 0.14-0.18
H Chilled cast iron Hardened 60 HRC 39
40
Cast 400

Cast iron Hardened 55 HRC 41

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.

• When using external coolant supply only, reduce cutting speed by 10%

• Use internal coolant supply when machining austenitic stainless steel

(1) For workpiece materials list, see pages 495-524

178 ISCAR