Selecting The Speed; Standard Values For Cutting Speeds - Optimum OPTImill MH 25 SV Betriebsanleitung

4.12

Selecting the speed

The correct speed is an important factor for milling. The speed determines the cutting speed by
which the cutting edges cut the material. By selecting the correct cutting speed, the service life
of the tool is increased and the working result is optimized.
The optimum cutting speed largely depends on the material of the workpiece and the material
the tool is made of. With tools (milling cutters) made of hard metal or ceramic insert it is possi-
ble to work with higher speeds than with tools made of high-alloy high speed steel (HSS). You
will achieve the optimal cutting speed by selecting the correct rotation speed.
In order to determine the correct cutting speed for your tool and for the material to be cut you
may refer to the following standard values or a table reference book (e.g. Tabellenbuch Metall,
Europa Lehrmittel, ISBN 3808517220).
The required speed is calculated as follows:
V
----------- -
n =
π ×
d
-1
n = speed in min (revolutions per minute)
V = cutting speed in m/min (meter per minute)
d = tool diameter in m (Meter)

4.12.1 Standard values for cutting speeds

[ m/min ] with high-speed steel and hard metal in upcut milling.
Tool
Plain mill and side milling cutters [ m/min ]
Relieved form cutters [ m/min ]
Cutter head with SS [ m/min ]
Cutter head with HM [ m/min ]
The results are the following standard values for speeds depending on the
milling cutter diameter, cutter type and material.
Tool diameter
[ mm ] shell end mill and
side milling cutters
35
40
45
50
55
60
65
Version 1.0.1 dated 2015-12-17
Steel Grey cast iron
10 - 25 10 - 22
15 - 24 10 - 20
15 - 30 12 - 25
100 - 200 30 - 100
Steel Grey cast iron
10 - 25 m/min 10 - 22 m/min
Speed [
91 - 227 91 - 200
80 - 199 80 - 175
71 - 177 71 - 156
64 - 159 64 - 140
58 - 145 58 - 127
53 - 133 53 - 117
49 - 122 49 - 108
Original operating instructions
OPTIMUM
M A S C H I N E N - G E R M A N Y
Al
alloy
hardened
150 - 350
150 - 250
200 - 300
300 - 400
Al alloy
cured 150 - 350
m/min
-1
min
]
1365 - 3185
1195 - 2790
1062 - 2470
955 - 2230
870 - 2027
795 - 1860
735 - 1715
MH25SV GB
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