40
9.7.1 - Recommended cutting parameters
Mild steel
R = 350-
500 N/mm
2
Semi-ha
rd steel
R = 500-
700 N/mm
2
Hard steel
R = 750-
950 N/mm
2
Extra-hard ste
el
R = 950-
1000 N/m
m
2
Heat-t
reated steel
R = 950-
1300 N/m
m
2
Austenitic stainless steel
R = 500-
800 N/mm
2
Martensitic
stainle
ss steel
R = 500-
800 N/mm
2
Grey cast
iron
Alum
inium
and alloys
R = 200-
400 N/mm
2
Alum
inium
and alloys
R = 300-
300 N/mm
2
Copper
R = 200-
350 N/mm
2
Phosph
or
br
onze
R = 400-
600 N/mm
2
Har
d
br
onze
R = 600-
900 N/mm
2
Brass
R = 200-
400 N/mm
2
Alloyed br
ass
R = 400-
700 N/mm
2
T
itanium
and alloy
s
R = 300-
800 N/mm
2
T
ubes and beam
s
0,
05 D
R = 300-
600 N/mm
2
T
ubes and beam
s
0,
025 D
R = 300-
600 N/mm
2
γ
20 18 15 12 10 12 15 12 22 20 20 15 12 16 12 18 18 15
CUTTING
ANGLES
α
8
8
8
6
6
8
6
8 10
8 10
8
8 16 16
8
8
8
*T mm
5 4 4 3 2 4 4 4 6 5 6 5 4 5 5 4 3 2
Vt m/1’
50 30 20 15 9 20 20 25 1100 200
400
400
120 600 500 50 19 35
10-20
Av mm/1’
160 130 110 60 35 50 50 100 1800 400 600 800 160 1100 700 160 130 130
*T mm
7 6 6 4 3 6 6 6 8 7 8 7 8 6 7 4 4 3
Vt m/1’
45 30 20 15 9 19 19 23 1000 180
350
400
110 600 400 45 18 33
20-40
Av mm/1’
150 120 110 60 33 45 45 100 1700 400 600 700 150 1100 600 150 120 120
*T mm
10 9 8 6 4 8 8 8 12 10
11
10 8 10 10 6 5 4
Vt m/1’
45 25 18 14 9 18 18 22 900 160
300
350
100 550 350 45 18 30
40-60
Av mm/1’
140 110 100 50 30 45 45 90 1600 350 550 700 140 1000 600 140 110 110
*T mm
12 12 11 9 6 11 11 11 16 12 14 12 10 12 12 10 6 5
Vt m/1’
40 25 17 14 8 17 17 20 800 160
250
300 90 550 350 45 17 30
60-90
Av mm/1’
130 110 50 50 28 40 40 80 1400 300 550 600 130 900 500 130 110 110
*T mm
14 14 14 12 8 14 14 14 18 14 17 14 12 16 16 12 6 5
Vt m/1’
40 20 15 13 8 15 15 19 700 140
200
250 70 500 300 40 16 28
90-110
Av mm/1’
110 100 80 45 25 40 40 880 1300 300 500 600 110 900 500 110 100 100
*T mm
16 16 16 14 10 16 16 16 20 16 18 16 14 18 18 14 8 6
Vt m/1’
35 20 14 13 7 14 14 17 600 130
150
200 60 500 300 35 16 26
110-130
Av mm/1’
100 90 70 45 25 35 35 70 1100 250
500
500
100 800 400
100 90 90
*T mm
18 16 16 14 12 16 16 16 20 16 20 18 16 18 18 16 10 6
Vt m/1’
30 15 12 12 7 12 12 16 500 130
120
150 50 450 200 30 15 24
SECTI
ON TO
B
E
CUT
(I
N M
M
)
130-150
Av mm/1’
90 80 60 40 22 35 35 60 900 250
400
400 90 800 400 90 80 80
RECOMMENDED
LUBRICANTS
Emulsion - Cutting oil
Dry
Kerosene
Dry
Emulsion
Cutting oil
Emulsion
9.7.2 - Diagram of cutting speeds according to blade diameter
T
Tooth pitch in millimetres
d
Diameter of the tooth fillet cone distance
Av mm/min
Advance in millimetres per minute
h
Tooth protrusion
Vt m/min
Cutting speed in metres per minute
γ
Front
rake
Az Tooth
advance
α
Rear
rake
Ng/min
Number of revs per minute
N/mm
Ultimate tensile stress
Z
Number of teeth on the blade
a-f
Flat parts of the cutting edge
p Tooth
depth
∅
Tube diameter or profile width