Top:
File position
lor
Rapid-Standard
Bottom: Sharpening with file holder
heights will be uneven
if
the cutter lengths are different.
If
the cutters are not all the same height the chain will run
roughly and eventually break.
As
it
is very important to achieve uniform cutter lengths it is
best to measure them with a slide caliper. Find and sharpen
the shortest cutter first and then use it as a masterfor
aH
the
others,
i.
e.
alii
cutters must be filed back to the same'length
as
the master cutter. Sharpen all the cutters on one side of
the chain first and then repeat the procedure
on
the other
side.
File position lor Rapid-Micro, Rapid-Super and Topic-Super
------
--J
The file must be held level for Rapid-Standard chain
so
that
it
is
at
90° to the perpendicular faces of the chain links.
On
Rapid-Micro, Rapid-Super and Topic-Super chains
the file and file holder must be guided so that the handle is
10°
lower than the tip of the file,
i.
e.in this case the file must
run upward at an angle of
10°
to the horizontal. Afile holder
must always be used for manual sharpening of Rapid-
Super and Topic-Super chains.
File evenly and steadily and note that the file
only
sharpens on the forward stroke. The file must be lifted
off the cutter
on
the backstroke. Make sure that you do not
touch the tie straps and drive links.
Burrs
on
the cutting
edge can be removed with a piece
of hardwood.
Rotate the file at frequent intervals
in
Order to prevent it
becoming worn unevenly.
Important: Sharpen the chain frequently and take away
as little material as possible. Two or three strokes of the file
are usually sufficient to
Ikeep
the chain sharp.
A STIHL electric sharpener greatly simplifies chain shar-
pening.
33
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