Stihl Ematic Principle; Stihl Ematic System; Maintenance - Stihl OILOMATIC Manual

4.4

STIHL Ematic Principle

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1
2
1
The distinguishing features on the
guide bars are the oil inlet hole (1)
drilled through one side of the bar
rail and the ramp-like hump (2) in
the groove at both sides of the bar
tail – next to the oil inlet hole. The
one-sided oil inlet hole prevents oil
seeping between the guide bar and
chain sprocket cover. The ramp
ensures that the chain oil in the bar
groove is transported with very little
loss through the groove to the chain
joints and bar rails as soon as the
chain starts running.
The Ematic principle therefore
makes more efficient use of the
lubricating oil. The oil feed rate can
be reduced to the amount actually
needed at the chain joints. It is not
necessary to increase oil flow to
make up for waste. This minimizes
environmental impact and reduces
running costs.
Ematic S is a further development of
the Ematic principle and is available
on long guide bars. An elliptic oil
inlet hole increases the flow speed
of the chain oil and improves
lubricating efficiency. This extends
the wear life of the guide bar and
saw chain.
Chain and Bar Manual
4.5

STIHL Ematic system

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STIHL Ematic is a system designed
to better utilize and help reduce the
consumption of chain lubricating oil
by up to 50%.
The STIHL Ematic system consists
of the three components:
– STIHL OILOMATIC
which the lubricating oil is fed
directly to the chain joints.
– STIHL Ematic guide bars on
which the chain lubricating oil is
conveyed through the entire
length of the bar groove with a
minimum of loss.
– STIHL Ematic oil pumps. When
an adjustable oil pump is used
together with an STIHL
®
OILOMATIC chain and a STIHL
Ematic guide bar its flow rate may
be reduced as described in the
instruction manual. Oil pumps
with no manual control are preset
at the factory for a reduced oil
feed rate.
Adjustable oil pump set to Ematic
4.6

Maintenance

Guide bar wear is highest in the
area where most of the cutting is
done. That is normally the
underside of the bar. On Duromatic
®
chain on
bars, the bar nose is another highly
stressed area.
Before mounting the guide bar and
chain:
– Clean the oil inlet holes and the
bar groove. The groove cleaner
on the filing gauges is suitable for
this purpose.
– Check the groove depth.
– Turn the guide bar over to ensure
it wears as evenly as possible on
both sides.
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