2017 International Forest Industries Magazines October November 2017 | Page 51
The 30RH-II is a heavier and more robust head for track-based harvesters and excavators up to 25 t
Kesla is a Finnish technology group
well known to the forestry space as
a leading international harvester
head manufacturer. The extensive
Kesla range covers both roller
and stroke harvester heads for
professionals, from small thinning
heads up to heavy-duty heads for
clear cuttings and processing at
landings.
At Elmia this year, Kesla
the new series of large heads,
replacing the existing 28RH and
30RH models. The new, modular
series of the heads includes three
different models, 27RH-II, 28RH-II
and 30RH-II, and a wide range of
options.
The Kesla 27RH-II is a light but
powerful head for large rubber-
wheeled harvesters and excavators
up to 20 t in capacity. The head
features 2WD feeding with the
Kesla’s unique variable roller angle
linkage. With three delimbing
knives and short frame design, it
offers exceptionally high power-to-
weight ratio a nd excellent features
for processing curved trees and
eucalyptus.
The Design of the 28RH-II is
similar to the 27RH-II, but it is
equipped with four delimbing
knives and the option of 2WD or
3WD synchro-feeding.
The 30RH-II is a heavier and
more robust head for track-based
harvesters and excavators up to
25 t.
It has, like the 28RH-II, four
delimbing knives and it can be
equipped with whether 2WD or
3WD synchro-feeding. Max sawing
diameter of the new heads is 780
mm with JPS R5500 saw unit, and
max delimbing force is 36 kN.
The new heads suit coniferous
to hardwoods, according to Kesla.
It includes lots of options to equip
the head to different working
conditions, from the borealis
coniferous woods to hardwoods
or processing and debarking of
eucalyptus and acacia.
and quality, leading to improved
durability and longer service life.
Overall, the design is much
more protected, offering better
protection for hoses and sensitive
components, meanwhile
serviceability has also been
improved.
“Altogether, the new heads
have more than 100 improvements,
compared with the old ones, that
lift them to a totally new level,” the
manufacturer stated.
Improved performance,
durability and reliability
Performance of the new heads
has been greatly improved by the
new hydraulics, valves, hosing
and feeding motors. Feeding
and sawing power especially has
increased remarkably.
The length and diameter
measuring systems have been
redesigned for better measuring
accuracy to meet the highest
standards in the industry. For
debarking applications, the heads
can be equipped with optional
length encoders in the feed motors
and optical butt-end sensor.
The sturdier frame construction
includes many changes and more
mechanized parts to further
improve manufacturing accuracy
The Kesla 30RH II
The Kesla 27RH-II is a light but powerful head for large rubber-wheeled
harvesters and excavators up to 20 t in capacity
International Forest Industries | OCTOBER / NOVEMBER 2017 49