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In addition, the powerful drive enables
asphalt pavements to be removed not
just layer by layer, levelling unevenness
in the surface course or increasing
the grip, but also by removing entire
roadways down to a maximum milling
depth of 350mm in a single pass. The
Franco brothers agree: “This extra
power often makes all the difference on
large, time-critical projects at airports
or on highways.” Particularly when
operating at large milling depths, the
W 220 has another handy feature up
its sleeve: The right-hand side plate can
be raised by 450mm, so that a curb can
be scanned as a reference, even when
working at large milling depths, and
the machine can remove the pavement
completely.
A glance at the traction drive shows
that its power is harnessed intelligently,
since Wirtgen has equipped the W 220
with the intelligent ISC traction drive. It
delivers optimum traction with electronic
traction control, adapts the advance rate
of the machine to the current engine
load, and regulates the current speed
of the external and internal crawler
tracks on bends. On the SS 26, this was
particularly advantageous on the many
hairpin bends.
Adapted milling drum speed
Thanks to the variable milling drum speed
of the W 220, on which three speeds
can be set from the operator’s stand,
the machine operator can also influence
the milling texture; that is, the surface
finish and the peak-to-valley depth. For
the project on the SS 26, the Italfrese
team decided to combine the maximum
milling drum speed with a high advance
rate when milling off the surface course.
Meanwhile, the HT 22 quick-change tool-
holder system and type W 7 cutting tools
ensured cost-efficiency.
8
MAY 2019
The W 220 has plenty of steam, even when operating at large milling widths.
Intelligent use of power
answer was: the new W 220. Though
the milling machine was operating
at quite a high milling speed, it had
not yet reached its technical limits.
The immense engine power and the
sophisticated control system enabled
the machine to mill at a constant speed,
even in regions at higher altitudes and
on hairpin bends — a feat achieved
while maintaining a moderate fuel
consumption,” say the Franco brothers.
Milling performances like these
are achievable thanks to the excellent
weight-to-power ratio of the new W 220:
An operating weight of 36 360kg meets
an engine output of 571kW (777HP).
From left: Emanuele Franco (technical director), Ernesto Franco (managing director),
and Pop Vasilev Gonco (senior milling machine operator) from Italfrese.
High machine utilisation
Thanks to its powerful engine, the
W 220 has plenty of steam, even when
operating at large milling widths. The
large milling machine therefore is not
only available with the standard 2.2m
milling drum assembly, but also is
optionally available with a 2.5m-wide
version. To enable the machine to flexibly
produce certain surface textures, the
FCS Light milling drum changing system
also is optionally available for the 2.2m
milling drum assembly. As a result,
milling drums can be exchanged quickly
for drums with another tool spacing —
be it standard milling drums, Eco Cutters,
or fine milling drums — equipping the
machine for a wide range of applications.
Quiet power development
Despite creating a machine with an
immense power development, Wirtgen’s
development engineers were able to
greatly reduce noise emissions. The
Italfrese team immediately noticed this
on the job at the foot of Mont Blanc.
Thanks to this feature, the team has no
concerns about working in residential
areas, and indeed the milling contractor
already has such a job lined up for its
new powerhouse.
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