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DIN 326 i DIN 327 - Machining
parameters |
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Recommended machining parameters for slot drills DIN
326 / 327
manufactured from SW7M (HSS-E) steel for the machining of materiale of
N group |
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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 |
Carbon steel
Rm <= 800 N/mm2 |
30 |
65 |
85 |
100 |
80 |
57 |
42 |
Alloy steel
Rm <=1000 N/mm2 |
22 |
49 |
58 |
67 |
60 |
45 |
33 |
Alloy steel
Rm <= 1000 N/mm2 |
15 |
40 |
49 |
51 |
48 |
37 |
25 |
| Stainless and acid-resisting steel |
10 |
14 |
23 |
27 |
21 |
15 |
11 |
| Grey and malleable cast iron |
30 |
68 |
100 |
95 |
87 |
75 |
57 |
| Ductile cast iron |
22 |
61 |
65 |
69 |
57 |
45 |
33 |
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Remarks:
- For the and mills made from SK8M (HSS-E) machining
parameters should be increased by 35%
- The above parameters can be used for the model machining conditions
(plentiful cooling, right selected coolant, stiffness of the machine
tool, etc.),
- For the long "L" type the value of feed should be reduced
at next 50%,
- For the end mills 3 flutes (z=3) feed should be increased at 30%
(f min x 1.3);
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