Page 312 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE
GUNDRILLS Gundrill Recommended Machining Conditions Material Cutting 2.0-9.79 9.8-11.69 11.7-13.19 13.2-16.19 16.2-40

Tensile
Feed (mm/rev) vs. Drill Diameter (mm)
Strength Hardness Group Speed vc
ISO
No.
Condition
HB
Material
[N/mm ]
2
(1)
m/min
Annealed
<0.25% C
Annealed
650
80-110
190
Non-alloy
steel and >=0.25% C Quenched 420 125 1 2 70-110
cast steel, <0.55% C and tempered 850 250 3 70-100 0.01-0.03 0.03-0.05 0.035-0.06 0.04-0.07 0.02-0.10
free cutting >=0.55% C Annealed 750 220 4 70-110
steel Quenched
and tempered 1000 300 5 70-90
Annealed 600 200 6 80-110
P Low alloy and cast 930 275 7 70-110
steel (less than 5% of Quenched 0.01-0.03 0.03-0.05 0.035-0.06 0.04-0.07 0.02-0.10
alloying elements) and tempered 1000 300 8 60-90
1200 350 9 50-80
Annealed 680 200 10 50-70 0.01-0.03 0.025-0.04 0.03-0.045 0.035-0.05 0.12-0.10
High alloyed steel, cast
steel and tool steel Quenched 1100 325 11
and tempered
Ferritic/ 40-70 0.01-0.03 0.025-0.04 0.03-0.045 0.035-0.05 0.12-0.10
Stainless steel martensitic 680 200 12
and cast steel
Martensitic 820 240 13
Stainless steel Austenitic,
M 600 180 14 40-80 0.01-0.03 0.025-0.04 0.03-0.045 0.035-0.05 0.02-0.10
and cast steel duplex
Ferritic/
pearlitic 180 15 70-100
Grey cast iron (GG)
Pearlitic/
martensitic 260 16 70-100
K Ferritic 160 17 80-110 0.01-0.40 0.04-0.1 0.05-0.12 0.06-0.14 0.05-0.20
Nodular cast iron (GGG)
Pearlitic 250 18 80-110
Ferritic 130 19 90-115
Malleable cast iron
Pearlitic 230 20 90-115
Not 60 21
Aluminum-wrought alloys hardenable
Hardenable 100 22 80-160
Not
<=12% Si hardenable 75 23 0.02-0.04 0.03-0.17 0.03-0.18 0.035-0.19 0.03-0.15
Aluminum-
cast alloys Hardenable 90 24
>12% Si High 130 25 80-120
N temperature
>1% Pb Free cutting 110 26
Copper Brass 90 27
alloys Electrolitic
copper 100 28 80-180 0.02-0.04 0.02-0.13 0.03-0.16 0.04-0.18 0.03-0.15
Duroplastics, 29
Non-metallic fiber plastics
Hard rubber 30
Annealed 200 31
Fe based
Hardened 280 32
High temp. Annealed 250 33
alloys Ni or Co Hardened 350 34
S based Cast 320 35 25-60 0.01-0.03 0.025-0.03 0.03-0.035 0.03-0.04 0.02-0.10
Pure 400 36
Titanium alloys Alpha+beta
alloys 1050 37
hardened
Hardened 55 HRC 38 20-50 0.025-0.03 0.03-0.035 0.03-0.04
Hardened steel
H Hardened 60 HRC 39 0.01-0.03 0.02-0.10
Chilled cast iron Cast 400 40
Cast iron Hardened 55 HRC 41
(1) For workpiece materials list, see pages 495-524

310 ISCAR