Page 22 - Die_and_Molds_User_Guide_7861458_2017

Table 5 Estimated Starting Feed fz
Harder Tougher
ISO Class Workpiece material Starting feed fz, mm/tooth, for grades
DIN/ISO 513 Mat. σ Hard-
Type T ness, IC808 IC5100 IC810 DT7150 IC830 IC330
Group* N/
mm 2 HB
Plain carbon 1-4 <850 <250 0.1-0.25 0.1-0.25 0.1-0.25 0.1-0.35 0.1-0.4
>850 >250
steel 5 <1000 <300 0.1-0.25 0.1-0.25 0.1-0.25 0.1-0.3 0.1-0.4
6, 7 <1000 <300 0.1-0.25 0.1-0.2 0.1-0.25 0.1-0.3 0.1-0.4
P Alloy steel 8, 9 >1000 >300 0.1-0.2 0.1-0.18 0.1-0.2 0.1-0.25 0.1-0.3
and <1200 <350
<850
tool steel 10 >1100 <250 0.08-0.18 0.08-0.15 0.08-0.18 0.1-0.25 0.1-0.25
11 >325 0.08-0.15 0.08-0.12 0.08-0.15 0.08-0.2 0.08-0.25
<1450
M Martensitic 12, 13 <850 <250 0.08-0.12 0.08-0.15 0.08-0.2
s.s.
Grey cast iron 15-16 <1000 <300 0.2-0.35 0.2-0.4 0.2-0.4 0.2-0.3
K Nodular cast 17-18 <1000 <300 0.2-0.35 0.2-0.4 0.2-0.4 0.2-0.3
iron
>1480 HRC
38.1 0.07-0.12 0.07-0.1
<1700 45-49
>1700 HRC
38.2 <2000 50-55 0.06-0.09
H Hardened
Milling Tools
steel
>2000 HRC
39 0.05-0.08
<2500 56-63
* ISCAR material group in accordance with VDI 3323 standard
- First choice for grades
For T290 milling tools the table values should be reduced by 30%.
For the face mills with inserts HP ANKX…07 and T490 LN..T…08 the table values should be reduced by 20%.
For milling hardened steel, see the appropriate chapter for further discussion.
Fig. 1. Tooth load areas

h
ap

1

3 Heavy
4 ap h
1
3 Heavy
4
1 1 Moderate
2 Moderate 2 1
4 Light
h ap
b
1 1 3 1 D
1 b 4 2 4
4 D
Light

1 1 3 b
1
4 2 4 D

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