Sandvik Coromant Heat resistant super alloys - Manual (Page 66)

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CoroMill® 300 CoroMill® 245 CoroMill® 390
CoroMill® 300 CoroMill® 390 CoroMill® Plura CoroMill® 316
S-R120R/CoroMill® 300C
Cutter concept
Modern milling is a very universal machin-
ing method. During the past few years hand
in hand with machine tool developments,
milling has evolved into a method that
machines a very broad range of configura-
tions. The choice of cutter concept is no
longer straightforward – in addition to all
the conventional applications, milling is
a strong contender for producing holes,
threads, cavities and surfaces that used to
be turned, drilled, or tapped etc. (See hole
making chapter). Tooling developments have
also contributed to the new possibilities
along with the gains in productivity, reliabil-
ity and quality consistency that have been
made in indexable and ceramic inserts. The aim is to have a strategy suited to the
machine tool and feature to be machined
giving a maximum metal removal rate (Q
cm
3 /min) that can be balanced with an
economic tool life.
For milling there are many variables to
consider:
D
c
– cutter diameter
z
n
– number of effective teeth
k
r
– entering angle
a
p max
– maximum cutting depth
a
e max
– maximum radial cut
End mills
Round inserts 90º Solid carbide Exchangeable head
Design types
Face mills
Round inserts 45º 90º
Ceramic insert cutter Ball nose
CoroMill® Ball nose 216