Stihl OILOMATIC Manual page 31

®
STIHL OILOMATIC chain offers
the following advantages:
– Service life of the chain is
considerably increased – this has
been verified in the laboratory
and in field trials
– Optimum lubrication
– Less wear
– Service life of the bar and
sprocket is also extended.
The STIHL Ematic system (see 4.4)
®
consists of an OILOMATIC
a STIHL Ematic guide bar and a
variable-flow or reduced-flow oil
pump.
It is designed to better utilize and
help reduce the consumption of
chain lubricating oil by up to 50%.
The Ematic system is yet another
STIHL contribution to a cleaner
environment.
In conventional lubricating systems
the sliding faces on the chain and
guide bar normally receive sufficient
lubrication, but too little oil reaches
the chain joints. This causes
excessive wear in the chain joints.
The result is premature wear of the
chain, sprocket and roller nose.
30
3.17.7 Bar and Chain Oil
The ability of the film of lubricant to
reduce friction is dependent to a
large extent on the chemical
composition and consistency of the
lubricant used. The quality of the
lubricating oil is therefore vitally
importance for the efficiency of
chain lubrication and thus the life of
the entire cutting attachment.
In addition to good lubricating
properties a chain oil must possess
the following characteristics:
– Good adhesive properties to
ensure that as little oil as possible
is thrown off the cutting
attachment by centrifugal force.
– A low setting point to ensure that
it still flows at extremely low
temperatures.
– A high flash point to ensure that it
cannot be ignited by the heat
generated during cutting.
chain,
– Wear protection to ensure that
the wear on the chain and guide
bar is reduced to an absolute
minimum.
– Antioxidant additive (in biological
oils) to provide long-term
protection of lubricated
components against
resinification of the oil when it
comes into contact with oxygen.
STIHL high-grade chain lubricants
meet all these specifications. They
achieved excellent results in terms
of the wear life of the cutting
attachment.
We recommend the use of STIHL
chain lubricating oils.
Those owners who wish to minimize
environmental impact should use
STIHL Bioplus. Unlike STIHL
Bioplus, unalloyed biological chain
oil offers inadequate resistance to
oxidation.
Once air is admitted this can
relatively quickly result in serious
gumming up and encrustations
which can damage the saw's oil
pump and the chain beyond repair.
Never use waste oil.
Waste oil does not have the
required lubricating properties and
is unsuitable for chain lubrication.
Prolonged and repeated contact
with waste oil can cause skin
cancer, and also pollutes the
environment.
3.18 Sharpening the Saw
Chain
Every cutting tool, including the saw
chain, is subject to wear and tear.
The cutting edges become dull. As
dullness increases so does the
effort required for cutting. The
cutters have to be resharpened.
Less material has to be removed if
the cutters are always sharpened
before they get dull and this in turn
increases saw chain life.
Chain and Bar Manual