WARNING:
A dull or improperly
sharpened chain can cause excessive
motor speed during cutting, which may
result in severe motor damage.
WARNING:
Improper
sharpening increases the potential of
kickback.
WARNING:
Failure to replace or
repair a damaged chain can cause
serious injury.
Top Plate Sharpening Angles (Fig.
36)
•
CORRECT 30
obtained only when the specified files and
proper setting are used. File holders are
marked with guide marks to align the file
properly to produce the correct top plate
angle.
•
LESS THAN 30
•
MORE THAN 30
is feathered and dulls quickly.
Side Plate Angle (Figure 37)
•
CORRECT 55'- The optimal angle can be
produced automatically if the correct diameter
file is used in the file holder.
•
HOOK- "Grabs" and dulls quickly. Increases
potential of KICKBACK. Results from using a file
with a diameter that is too small, or a file held
too low.
•
BACKWARD SLOPE- Needs too much feed
pressure, causes excessive wear to bar and
chain. Results from using a file with a diameter
too large, or a file held too high.
chain
17
o
- This optimal angle can be
o
- The tooth is too dull for cutting.
o
- The edge Ofthe cutting tooth