Rollomatic Guide Bars; Rollomatic E - Stihl OILOMATIC Manual

TM
On the 1/4" RAPID Micro
Spezial, the forward sloping tail of
the top plate (arrow) does not make
contact when cutting with the bar
nose. The clearance between the
cutter and kerf prevents the top
plate snagging – the cutting edge is
not pushed out of the cut.
– Reduced load on bar nose
– High plunge cutting speed
– Less feed effort for plunge cutting
– Smooth cutting with bar nose
– Low vibrations
Applications
Tree service, wood carving and
woodworking
Chain and Bar Manual
4.2.3

Rollomatic Guide Bars

2
TM
The main feature of Rollomatic bars
is the nose sprocket (1). It is
supported in a ring of cylindrical
rollers (2). The nose sprocket
carries the chain from one side of
the bar to the other. Friction and
wear on the bar nose are
substantially reduced in comparison
with a Duromatic guide bar (rolling
friction instead of sliding friction).
The nose sprocket bearing is
protected from dust and dirt by thin
sheet steel covers (3) at both sides
and is maintenance-free. The chain
oil that reaches the bearing from the
bar groove provides sufficient
lubrication, i.e. no special
lubrication is necessary.
Assuming the same driving power,
Rollomatic bars have a much higher
cutting capacity than Duromatic
bars. This increase in performance
is most noticeable on lower
powered chainsaws. The lower rate
of frictional wear and higher cutting
capacity also have a positive effect
when limbing.
These benefits and the narrow
contour make Rollomatic bars the
ideal choice for limbing applications.
Rollomatic guide bars are available
in several versions to suit the
different chainsaw power categories
3
and operating requirements.
1
4.2.4

Rollomatic E

The blade of the Rollomatic E
consists of three electrically welded
steel plates (a center plate
sandwiched between two side
plates). The thickness and outer
contour of the center plate produce
the specified groove width and
depth. Large areas of the center
plate are punched out to save
weight.
Compared to a solid-blade
Duromatic bar, the Rollomatic E is
much lighter and very strong.
Guide bar rails are induction
hardened and the nose sprocket is
replaceable. The size of the nose
sprocket is expressed as the
number of teeth. The size of the bar
nose (nose sprocket) has an effect
on the cutting and kickback
behavior of the guide bar.
Rollomatic E guide bars are
manufactured with a pitch of 3/8"
and with two different sizes of nose
sprockets (bar noses) to cover a
wide range of applications:
39