DIN 844 and DIN 845 Machining parameters
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Recommended machining parameters for end mills center
cutting DIN 844 and DIN 845
for the machining of N group materials. |
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| Type of the machined material |
Vc.[m/min] |
Feed [mm/min] depended diameter of end mill [D] |
| to Φ5 |
Over Φ5
to Φ10 |
over. Φ10 to Φ20 |
over. Φ20 to Φ35 |
over. Φ35 to Φ44 |
over. Φ44 to Φ63 |
Alloy steel
Rm <= 800 N/mm2 |
30 |
180 |
200 |
185 |
150 |
120 |
95 |
Alloy steelnarz.
Rm <=1000 N/mm2 |
22 |
150 |
180 |
145 |
110 |
90 |
70 |
Alloy steel
Rm <= 1000 N/mm2 |
15 |
150 |
180 |
145 |
110 |
90 |
70 |
| Stainless and acid-resisting steel |
10 |
65 |
80 |
65 |
50 |
40 |
30 |
| Grey and malleable cast iron |
30 |
300 |
310 |
300 |
225 |
185 |
100 |
| Ductile cast iron |
22 |
150 |
180 |
145 |
110 |
90 |
70 |
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| Remarks:
- For end mills manufactured from SK8M (HSS-E) steel
machining parameters should be increased by 35%.
- The above parameters can be used for the model
machining conditions (plentiful cooling, right selected for particular
group coolant, stiffness of the machine tool, etc.)
- Feed values concern depth of machining 0,1D; for other depths
are obligatory below rules:
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| Depth of machining |
Feed |
| 0,25D |
65% of feed from table 1 |
| 0,5D |
40% of feed from table 1 |
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- For the long variation "L" feed value is reduced by
next 50 %
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