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5.4
Table cutting speeds
Reference values for cutting speeds
v
c
in
m/min
when turning high speed steel and hard metal. (Excerpt from VDF 8799, Gebr. Boehringer GmbH, Göppingen)
1) The entered values apply for a chipping depth of up to 2.24 mm. From 2.24 mm to 7.1 mm the values must be reduced by 1 stage of the row R10 by approximately 20%. From 7.1 mm to 22.4
mm the values must be reduced by 1 stage of the row R5 by approximately 40%.
2) The values
v
c
must be reduced by 30 .... to 50% for turning a crust, for removal of cast skin or for sand inclusions.
3) The service life
t
for hard metal P10, K10, K20 = 240 min; for high speed steel SS = 60 min.
Material
Tensile
strength
R
m
in
N
mm
2
Cutting material
3
)
Infeed
f
in mm/rev. and setting angle
k
r
1
)
2
)
0.063
0.1
0.16
0.25
0.4
0.63
1
1.6
2.5
45
0
60
0
90
0
45
0
60
0
90
0
45
0
60
0
90
0
45
0
60
0
90
0
45
0
60
0
90
0
45
0
60
0
90
0
45
0
60
0
90
0
45
0
60
0
90
0
45
0
60
0
90
0
St 34; St 37; C22;
St 42
High-speed steel
50
40
34.5
45
35.5
28
35.5
28
22.4
28
22.4
18
25
20
16
20
16
12.5
16
12.5
10
up to 500
P 10
250
236
224
224
212
200
200
190
180
180
170
160
162
150
140
140
132
125
125
118
112
112
106
100
St 50; C 35
500...600
High-speed steel
45
35.5
28
35.5
28
22.4
28
22.4
18
25
20
16
20
16
12.5
16
12.5
10
12.5
10
8
P 10
224
212
200
200
180
170
160
160
150
140
140
132
125
125
118
112
112
106
100
100
95
90
St 60; C45
600...700
High-speed steel
35.5
28
22.4
28
22.4
18
25
20
16
20
16
12.5
16
12.5
10
12.5
10
8
10
8
6.3
P 10
212
200
190
190
180
170
170
160
150
150
140
132
132
125
118
118
112
106
106
100
95
St 70; C60
700...850
High-speed steel
28
22.4
18
25
20
16
12.5
16
12.5
16
12.5
10
12.5
10
8
10
8
6.3
8
6.3
5
P 10
180
170
160
160
150
140
140
132
125
125
118
112
106
100
95
95
90
85
85
80
75
Mn-;
CrNi-,
CrMo-
among others
alloyed steels
700...850
High-speed steel
25
20
16
20
16
12.5
16
12.5
10
12.5
10
8
11
9
7
9
7
5.6
7.5
6
4.5
P 10
180
170
160
160
150
140
140
132
125
125
118
112
106
100
95
95
90
85
85
80
75
850...1000
High-speed steel
20
16
12.5
16
12.5
10
12.5
10
8
10
8
6.3
8
6.3
5
7.1
5.6
4.5
5.6
4.5
3.6
P 10
140
132
125
125
118
112
100
95
90
90
85
80
71
67
63
63
60
56
56
53
50
1000..1400
High-speed steel
14
11
9
11
9
7
9
7
5.6
7
5.6
4.5
5.6
4.5
3.6
4.5
3.6
2.8
3.6
2.8
2.2
P 10
80
75
71
71
67
63
63
60
56
56
53
50
50
47.5
45
45
42.5
40
33.5
33.5
31.5
Rust-resistant steel
600..700
P 10
80
75
71
71
67
63
56
53
50
50
47.5
45
45
42.5
40
33.5
33.5
31.5
31.5
30
28
Tool steel
1500..1800
High-speed steel
9
7
5.6
5.6
4.5
3.6
4
3.2
2.5
P 10
45
42.5
40
40
37.5
35.5
35.5
33.5
31.5
28
26.5
25
25
23.4
22
22
21
20
18
17
16
Mn - High-carbon steel
P 10
33.5
33.5
31.5
31.5
30
28
28
26.5
25
22
21
20
20
19
18
18
17
16
GS-45
300..500
High-speed steel
45
35.5
28
35.5
28
22
31.5
25
20
25
20
16
20
16
12.5
16
12.5
10
12.5
10
8
P 10
150
140
132
118
112
106
106
100
95
95
90
85
85
80
75
75
71
67
67
63
60
GS-52
500..700
High-speed steel
28
22
18
25
20
16
20
16
12.5
16
12.5
10
12.5
10
8
11
9
7
9
7
5.6
P 10
106
100
95
95
90
85
85
80
75
75
71
67
67
63
60
60
56
53
53
50
47.5
GS-15
HB...2000
High-speed steel
45
40
31.5
31.5
28
22
22
20
16
18
16
12.5
12.5
11
9
11
10
8
9
8
6.3
K20
125
118
112
112
106
106
100
95
95
90
85
85
80
75
75
71
67
67
63
60
GS-25
HB
2000..2500
High-speed steel
28
25
20
20
18
14
14
12.5
10
11
10
8
9
8
6.3
7.5
6.7
5.3
6
5.3
4.25
K10
95
90
85
85
80
75
75
71
67
67
63
60
60
56
53
53
50
47.5
47.5
45
42.5
42.5
40
37.5
GTS-35
GTW-40
High-speed steel
37.5
33.5
33.5
28
26.5
25
22
21
20
18
17
16
12.5
12
11
11
10
10
9
8.5
8
K10/P10
95
90
85
85
80
75
75
71
67
67
63
60
60
56
53
53
50
47.5
47.5
45
42.5
42.5
40
37.5
White cast iron
RC420..570
K10
19
18
17
17
16
15
15
14
13.2
13.2
12.5
11.8
11.8
11.2
10.6
10.6
10
9.5
9
8.5
8
8
7.5
7.1
Cast bronze
DIN 1705
High-speed steel
53
50
47.5
47.5
45
42.5
42.5
40
37.5
37.5
35.5
33.5
31.5
30
28
28
26.5
25
25
23.6
22.4
K 20
315
300
280
280
265
250
250
236
224
224
212
200
200
190
180
180
170
160
160
150
140
140
132
125
Red brass
DIN 1705
High-speed steel
75
71
67
63
60
56
50
47.5
45
40
37.5
35.5
31.5
30
28
28
26.5
25
25
23.6
22.4
K 20
425
400
375
400
375
355
355
335
315
335
315
300
300
280
265
265
250
236
250
236
224
236
224
212
Brass
DIN 1709
HB
800..1200
High-speed steel
112
106
100
90
85
80
67
63
60
50
47.5
45
37.5
33.5
33.5
26.5
25
23.6
K 20
500
475
450
475
450
425
450
425
400
400
375
355
355
335
315
335
315
300
300
280
265
280
265
250
AL cast
DIN 1725
300..420
High-speed steel
125
118
112
100
95
85
75
71
67
56
53
50
42.5
40
37.5
31.5
30
28
25
23.6
22.4
K 20
250
236
224
224
212
200
200
190
180
180
170
160
160
150
140
140
132
125
125
118
112
118
112
106
100
95
90
Mg alloy
DIN 1729
High-speed steel
850
800
750
800
750
710
750
710
670
670
630
600
630
600
560
600
560
530
600
560
530
560
530
500
530
500
475
K 20
1600 1500 1400 1320 1250 1250 1180 1120 1120 1120 1060 1000 1000
950
900
900
850
800
800
750
710
710
670
630
630
600
560
