Sandvik Coromant Silent tools - application guide - Manual (Page 19)

17
2. Milling
Cutter pitch
When multiple inserts are in contact with the material, the risk of
vibration increases. As long as you are working with cutting depths
under the critical depth for vibration, an increased number of
inserts is more productive however. Work with both radial engage-
ment and the pitch of the cutter to find the best performance. In
most cases a coarse pitch is the best choice for productive
machining with dampened tools.
Differentially pitched cutter
with reduced number of
inserts. First choice for
unstable operations due to
the lowest cutting forces. Evenly or differentially
pitched cutter, depending
on concept, with medium
number of inserts. First
choice for roughing in
stable conditions. Evenly pitched cutter
with maximum number of
inserts. First choice for
high productivity with low
a
e
(more than one edge in
contact).
Coarse pitch – L Close pitch – M Extra close pitch – H
Differentially pitched cutter
Harmonic forces cause vibration and a differentially pitched cutter
is therefore an effective way to minimize vibration. It breaks the
harmonic forces and therefore increases stability and is especially
useful when a
e
is high and you have long overhangs.