Sandvik Coromant Heat resistant super alloys - Manual (Page 20)

18
iC
k
r
a
p
Round inserts and CoroCut®inserts with -RO geometry
Round inserts are the strongest inserts
available, and allow high productivity.
Typically aerospace components are large,
with large radii and blending profiles designed to eliminate high stress points
allowing round inserts to be used.
Entering angle –
k
r
The best performance is achieved when
the entering angle remains under 45°. This
gives a depth of cut of 0.15 x insert diam-
eter (the maximum depth of cut should be
no greater than 0.25 x diameter).
For larger depths of cut than 25% of the
diameter, it is better to use square inserts
with a constant 45° entering angle.
Note: this principle also applies to standard
inserts when the depth of cut is less than
the nose radius.
cos
k
r
=
(0.5iC–a
p
)
0.5iC