Top: Depth gauge setting
Bottom: Filing down depth gauge
The file must be lifted off the cutter
on
the backstroke. Make
sure you do not touch
the tie straps
an
drive links with the
file. Burrs
on
the cutting edge can be rubbed smooth with a
piece of hardwood.
Rotate the file at frequent intervals in order to prevent it
becoming worn on one side.
Important: Sharpen your chain frequently and take away
as
little material as possible. Two or three strokes of the file
are usually sufficient to keep the chain sharp.
A STIHL electric sharpener greatly simplifies chain shar-
pening.
Depth gauges
The depth gauge determines the height at which the cutter
enters the wood and thus the thickness of the chip
removed. The cutting capacity and life of a saw chain are
therefore influenced by the distance between the depth
gauge and the cutting edge,
i.
e.
the depth gauge setting.
This setting is 0.65 mm on Oilomatic-Picco chain and is
checked with the STIHL filing gauge
1110
8934000.
The best cutting results are obtained with the depth gauges
set to this value. However, the depth gauge setting may be
increased by 0.2 mm for cutting softwood
in
mild weather
conditions.
As
the cutter is sharpened the depth gauge setting
is
reduced. This means that the height of the depth gauge
must be checked and lowered if necessary. If the depth
Q
gauge projects from the filing gauge, it must be filed down
level with a flat or triangular file.
General chain maintenance
Chain maintenance begins as soon as the chain
is
fitted on
the bar and sprocket. The essential points are correct
chain tension and ample lUbrication. See
also"
Cutting
Attachment
".
Clean the chain thoroughly
in
gasoline after sharpening
in
order to remove filings or grinding dust. 37
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