Stihl MSA 160 T Instruction Manual page 70

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English
Cutter shapes
Micro = Semi-chisel
The specified angles A and B are
obtained automatically if the
recommended files or sharpening tools
and correct settings are used.
The angles must be the same on all
cutters. If the angles are uneven: Chain
will run roughly, not in a straight line,
wear quickly and finally break.
File holder
As these requirements can be met only
after sufficient and constant practice:
Use a file holder
N
A file holder must be used for manual
resharpening (see table "Sharpening
Tools"). The correct filing angles are
marked on the file holder.
Use only special saw chain sharpening
files. Other files have the wrong shape
and cut.
68
For checking angles
Use a STlHL filing gauge (special
accessory, see table "Sharpening
Tools"). This is a universal tool for
checking the filing and side plate angles,
depth gauge setting, cutter length and
groove depth. It also cleans the guide
bar groove and oil inlet holes.
File correctly
Take the battery out of the machine.
N
Select sharpening tools according
N
to chain pitch.
If you use an FG 2, HOS or USG
N
sharpener: Remove the chain from
the bar and sharpen according to
the instructions supplied with the
tool.
Clamp the bar in a vise if necessary.
N
Sharpen the chain frequently, take
N
away as little metal as possible –
two or three strokes of the file are
usually enough.
Hold the file horizontally (at a right
N
angle to the side of the guide bar)
and file according to the angles
marked on the file holder. Rest the
file holder on the top plate and depth
gauge.
Always file from the inside to the
N
outside of the cutter.
The file only sharpens on the
N
forward stroke – lift the file off the
cutter on the backstroke.
Avoid touching the tie straps and
N
drive links with the file.
Rotate the file at regular intervals
N
while filing to avoid one-sided wear.
Use a piece of hardwood to remove
N
burrs from the cutting edge.
Check angles with the filing gauge.
N
All cutters must be the same length.
90°
MSA 160 T

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