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KI.

Recommended Feed Rates for Solid-Carbide End Mills

Extra long version, helix angle 30°:

rel. width of cut a_e

0,140 0,120 +| 0,100 0,080 0,060

0,040

N

sz

o

-t-» l_

<D Q.

■D

f_z = 0,035

0,020 0,010

0,005

0,0

dT¡~

4

6 {

8

I

10

I

1

₂

14

i

16

i

Mill diameter

18 20

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1

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f

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1

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1

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f

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J

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0,4 x d 0,8 x d

1,2 x d 1,6 x d 2,0 x d 2,4 x d 2,8 x d

3,2 x d 3,6 x d

4,0 x d 4,4 x d 4,8 x d

a.

.c ■(-»

.

~o

CO

'■4-»

-t-»

Ü 0

Application example

Helical end milling (finishing)

Material............................................:

Tensile strength................................:

Milling tool........................................:

Milling diameter................................:

Carbide grade..................................:

Number of edges z..........................:

1.2379 (X155CrVMo121) 1020 N/mm²

F4AJ0800AWL50L200 KC635M 8 mm extra long cutting edge

KC635M

4 cutting edges

Cutting speed v_c..............................: 110 m/min

Cutting depth ap..........................

Width of cut a_e ...........................

16 mm 0,8 mm

Result: Feed per tooth f_z Feed rate Vf Speed n

Slot cutting : 0,040 mm 700 mm/min 4377 min"¹

Attention: In plunging (drilling) only one cutting edge over centre

is in contact, i.e. only 1 x f_z should be used to calculate the feed rate v_f!

119