Page 78 - HOLE MAKING CATALOG p001-148

USER GUIDE

Feed vs. Drill Diameter F [mm/rev]
INDEXABLE DRILLS
ISO
Hardness HB
Material No.(1)
26< ØD <28
29< ØD <32
33< ØD <35
36< ØD <43
44< ØD <50
Recommended Machining Conditions for MNC drills

Material Tensile Cutting
Strength Speed Vc
Condition [N/mm2] [m/min]
Vc Vc f f f f f f f f f f
min max min max min max min max min max min max

< 0.25 %C Annealed 420 125 1 120 200
≥ 0.25 %C Annealed 650 190 2

Non-alloy steel < 0.55 %C Quenched 850 250 3 0.25 0.35 0.25 0.35 0.25 0.40 0.25 0.40 0.28 0.45
and cast steel, and tempered

free cutting steel Annealed 750 220 4 130 190

≥ 0.55 %C Quenched 1000 300 5
and tempered

Annealed 600 200 6

P Low alloy and cast steel (less Quenched 930 275 7 120 180 0.25 0.33 0.25 0.33 0.25 0.38 0.25 0.38 0.26 0.43
than 5% of alloying elements) and tempered 1000 300 8
1200 350
9

High alloyed steel, cast Annealed 680 200 10
steel and tool steel 1100 325 11 100 160 0.25 0.33 0.25 0.33 0.25 0.36 0.25 0.36 0.26 0.41
Quenched
and tempered

Ferritic/ 680 200 12 90 140 0.12 0.24 0.12 0.24 0.16 0.25 0.18 0.25 0.18 0.30
Stainless steel and cast steel martensitic

Martensitic 820 240 13

M Stainless steel and cast steel Austenitic, 600 180 14 90 140 0.12 0.24 0.12 0.24 0.16 0.25 0.18 0.25 0.18 0.30
duplex

Gray cast iron (GG) Ferritic / 180 15
K pearlitic
260 16
Nodular cast iron (GGG) Pearlitic / 160 17 150 250 0.25 0.40 0.25 0.45 0.3 0.50 0.3 0.50 0.35 0.55
martensitic 250 18

Ferritic

Pearlitic

Malleable cast iron Ferritic 130 19
Pearlitic 230 20

Aluminum-wrought alloys Not 60 21
hardenable

Hardenable 100 22 160 260 0.3 0.50 0.3 0.50 0.35 0.55 0.35 0.55 0.4 0.60

Aluminum- ≤12% Si Not 75 23
cast alloys >12% Si hardenable 90 24
130 25
N Hardenable

High
temperature

>1% Pb Free cutting 110 26

Copper alloys Brass 90 27
100 28
Electrolytic
copper

Non metallic Duroplastics, 29
fiber plastics

Hard rubber 30

Fe based Annealed 200 31
Hardened 280 32
High temperature Annealed 250 33
Hardened 350 34
alloys Ni or Co 320 35
Cast
S based

Pure 400 36

Titanium alloys Alpha+beta 1050 37
alloys,

hardened

Hardened steel Hardened 55 HRC 38 20 50 0.1 0.16 0.12 0.18 0.14 0.2 0.14 0.2 0.16 0.22
H Chilled cast iron Hardened 60 HRC 39
40
Cast 400

Cast iron Hardened 55 HRC 41

(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.

76 ISCAR