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4) Always wear heavy-duty protective
gloves.
5) Ensure the chain is correctly
tensioned. Tighten the chain tension
so that the saw chain is taut and does
not wobble. Refer to “The Chain
Tension”.
NOTE:
Always file the saw chain at the
midpoint of the guide bar.
6) Use a suitable round file and file
holder, whose diameter is 1.1 times
the cutting tooth depth. Make sure
20% of the file diameter is above the
cutter's top plate. To sharpen the top
plate and side plate of each cutter.
Use a 5/32 inch (4 mm) diameter file.
Keep the file level with the top plate
of the cutter. Do not let the file dip or
rock. Use light, but firm pressure.
File toward the front corner of the
cutter. Lift the file away from the
cutter at the end of the forward stroke.
Only file on the forward stroke.
maintaining a 30 angle.
Apply a few firm strokes to each tooth.
When filed correctly, the top plate will
be at a 30° angle and the side plate
will be at an 80° angle. Using the
correct file and file holder will
automatically produce the correct
angles.
